jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/Global.java@d50e1752f59b (annotated)

src/jdk/nashorn/internal/objects/Global.java@d50e1752f59b (annotated)

src/jdk/nashorn/internal/objects/Global.java

Tue, 12 Feb 2013 12:47:51 +0100

author: attila
date: Tue, 12 Feb 2013 12:47:51 +0100
changeset 84: d50e1752f59b
parent 82: abea4ba28901
child 89: 43e32b36153c
permissions: -rw-r--r--

8007900: Function binding is inefficient
Reviewed-by: jlaskey, lagergren

 /*
  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package jdk.nashorn.internal.objects;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 import static jdk.nashorn.internal.runtime.linker.Lookup.MH;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.ref.SoftReference;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.runtime.ConsString;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.GlobalFunctions;
 import jdk.nashorn.internal.runtime.GlobalObject;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.NativeJavaPackage;
 import jdk.nashorn.internal.runtime.OptionsObject;
 import jdk.nashorn.internal.runtime.PropertyDescriptor;
 import jdk.nashorn.internal.runtime.RegExpMatch;
 import jdk.nashorn.internal.runtime.Scope;
 import jdk.nashorn.internal.runtime.ScriptFunction;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.ScriptRuntime;
 import jdk.nashorn.internal.runtime.ScriptingFunctions;
 import jdk.nashorn.internal.runtime.Source;
 import jdk.nashorn.internal.runtime.linker.InvokeByName;
 import jdk.nashorn.internal.scripts.JO$;
 import org.dynalang.dynalink.linker.GuardedInvocation;
 import org.dynalang.dynalink.linker.LinkRequest;
 /**
  * Representation of global scope.
  */
 @ScriptClass("Global")
 public final class Global extends ScriptObject implements GlobalObject, Scope {
     private static final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
     private static final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
     /** ECMA 15.1.2.2 parseInt (string , radix) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object parseInt;
     /** ECMA 15.1.2.3 parseFloat (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object parseFloat;
     /** ECMA 15.1.2.4 isNaN (number) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object isNaN;
     /** ECMA 15.1.2.5 isFinite (number) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object isFinite;
     /** ECMA 15.1.3.3 encodeURI */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object encodeURI;
     /** ECMA 15.1.3.4 encodeURIComponent */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object encodeURIComponent;
     /** ECMA 15.1.3.1 decodeURI */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object decodeURI;
     /** ECMA 15.1.3.2 decodeURIComponent */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object decodeURIComponent;
     /** ECMA B.2.1 escape (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object escape;
     /** ECMA B.2.2 unescape (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object unescape;
     /** Nashorn extension: global.print */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object print;
     /** Nashorn extension: global.load */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object load;
     /** Nashorn extension: global.exit */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object exit;
     /** Nashorn extension: global.quit */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object quit;
     /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object NaN = Double.NaN;
     /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object Infinity = Double.POSITIVE_INFINITY;
     /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object undefined = UNDEFINED;
     /** ECMA 15.1.2.1 eval(x) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object eval;
     /** ECMA 15.1.4.1 Object constructor. */
     @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object object;
     /** ECMA 15.1.4.2 Function constructor. */
     @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object function;
     /** ECMA 15.1.4.3 Array constructor. */
     @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object array;
     /** ECMA 15.1.4.4 String constructor */
     @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object string;
     /** ECMA 15.1.4.5 Boolean constructor */
     @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object _boolean;
     /** ECMA 15.1.4.6 - Number constructor */
     @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object number;
     /** ECMA 15.1.4.7 Date constructor */
     @Property(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object date;
     /** ECMA 15.1.4.8 RegExp constructor */
     @Property(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object regexp;
     /** ECMA 15.12 - The JSON object */
     @Property(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object json;
     /** Nashorn extension: global.JSAdapter */
     @Property(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object jsadapter;
     /** ECMA 15.8 - The Math object */
     @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object math;
     /** Error object */
     @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object error;
     /** EvalError object */
     @Property(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object evalError;
     /** RangeError object */
     @Property(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object rangeError;
     /** ReferenceError object */
     @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object referenceError;
     /** SyntaxError object */
     @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object syntaxError;
     /** TypeError object */
     @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object typeError;
     /** URIError object */
     @Property(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uriError;
     /** ArrayBuffer object */
     @Property(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object arrayBuffer;
     /** TypedArray (int8) */
     @Property(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int8Array;
     /** TypedArray (uint8) */
     @Property(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint8Array;
     /** TypedArray (uint8) - Clamped */
     @Property(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint8ClampedArray;
     /** TypedArray (int16) */
     @Property(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int16Array;
     /** TypedArray (uint16) */
     @Property(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint16Array;
     /** TypedArray (int32) */
     @Property(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int32Array;
     /** TypedArray (uint32) */
     @Property(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint32Array;
     /** TypedArray (float32) */
     @Property(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object float32Array;
     /** TypedArray (float64) */
     @Property(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object float64Array;
     /** Nashorn extension: Java access - global.Packages */
     @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object packages;
     /** Nashorn extension: Java access - global.java */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object java;
     /** Nashorn extension: Java access - global.javax */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object javax;
     /** Nashorn extension: Java access - global.javaImporter */
     @Property(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javaImporter;
     /** Nashorn extension: global.Java Object constructor. */
     @Property(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javaApi;
     /** Nashorn extension: current script's file name */
     @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public Object __FILE__;
     /** Nashorn extension: current script's directory */
     @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public Object __DIR__;
     /** Nashorn extension: current source line number being executed */
     @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public Object __LINE__;
     /** Used as Date.prototype's default value */
     public NativeDate   DEFAULT_DATE;
     /** Used as RegExp.prototype's default value */
     public NativeRegExp DEFAULT_REGEXP;
     /*
      * Built-in constructor objects: Even if user changes dynamic values of
      * "Object", "Array" etc., we still want to keep original values of these
      * constructors here. For example, we need to be able to create array,
      * regexp literals even after user overwrites global "Array" or "RegExp"
      * constructor - see also ECMA 262 spec. Annex D.
      */
     private ScriptFunction builtinFunction;
     private ScriptFunction builtinObject;
     private ScriptFunction builtinArray;
     private ScriptFunction builtinBoolean;
     private ScriptFunction builtinDate;
     private ScriptObject   builtinJSON;
     private ScriptFunction builtinJSAdapter;
     private ScriptObject   builtinMath;
     private ScriptFunction builtinNumber;
     private ScriptFunction builtinRegExp;
     private ScriptFunction builtinString;
     private ScriptFunction builtinError;
     private ScriptFunction builtinEval;
     private ScriptFunction builtinEvalError;
     private ScriptFunction builtinRangeError;
     private ScriptFunction builtinReferenceError;
     private ScriptFunction builtinSyntaxError;
     private ScriptFunction builtinTypeError;
     private ScriptFunction builtinURIError;
     private ScriptObject   builtinPackages;
     private ScriptObject   builtinJava;
     private ScriptObject   builtinJavax;
     private ScriptObject   builtinJavaImporter;
     private ScriptObject   builtinJavaApi;
     private ScriptObject   builtinArrayBuffer;
     private ScriptObject   builtinInt8Array;
     private ScriptObject   builtinUint8Array;
     private ScriptObject   builtinUint8ClampedArray;
     private ScriptObject   builtinInt16Array;
     private ScriptObject   builtinUint16Array;
     private ScriptObject   builtinInt32Array;
     private ScriptObject   builtinUint32Array;
     private ScriptObject   builtinFloat32Array;
     private ScriptObject   builtinFloat64Array;
     // Flag to indicate that a split method issued a return statement
     private int splitState = -1;
     // class cache
     private ClassCache classCache;
     // Used to store the last RegExp result to support deprecated RegExp constructor properties
     private RegExpMatch lastRegExpMatch;
     private static final MethodHandle EVAL    = findOwnMH("eval",    Object.class, Object.class, Object.class);
     private static final MethodHandle PRINT   = findOwnMH("print",   Object.class, Object.class, Object[].class);
     private static final MethodHandle PRINTLN = findOwnMH("println", Object.class, Object.class, Object[].class);
     private static final MethodHandle LOAD    = findOwnMH("load",    Object.class, Object.class, Object.class);
     private static final MethodHandle EXIT    = findOwnMH("exit",    Object.class, Object.class, Object.class);
     private final Context context;
     /**
      * Constructor
      */
     public Global(final Context context) {
         this.context = context;
         this.setIsScope();
         /*
          * Duplicate global's map and use it. This way the initial Map filled
          * by nasgen (referenced from static field in this class) is retained
          * 'as is'. This allows multiple globals to be used within a context.
          */
         this.setMap(getMap().duplicate());
         final int cacheSize = context._class_cache_size;
         if (cacheSize > 0) {
             classCache = new ClassCache(cacheSize);
         }
     }
     /**
      * Script access to "current" Global instance
      *
      * @return the global singleton
      */
     public static Global instance() {
         ScriptObject global = Context.getGlobal();
         if (! (global instanceof Global)) {
             throw new IllegalStateException("no current global instance");
         }
         return (Global)global;
     }
     /**
      * Script access to {@link Context}
      *
      * @return the context
      */
     static Context getThisContext() {
         return instance().context;
     }
     /**
      * Script access check for strict mode
      *
      * @return true if strict mode enabled in {@link Global#getThisContext()}
      */
     static boolean isStrict() {
         return getThisContext()._strict;
     }
     // GlobalObject interface implementation
     @Override
     public void initBuiltinObjects() {
         if (this.builtinObject != null) {
             // already initialized, just return
             return;
         }
         init();
     }
     @Override
     public ScriptFunction newScriptFunction(final String name, final MethodHandle handle, final ScriptObject scope, final boolean strict) {
         return new ScriptFunctionImpl(name, handle, scope, null, strict, false, true);
     }
     @Override
     public Object wrapAsObject(final Object obj) {
         if (obj instanceof Boolean) {
             return new NativeBoolean((Boolean)obj);
         } else if (obj instanceof Number) {
             return new NativeNumber(((Number)obj).doubleValue());
         } else if (obj instanceof String || obj instanceof ConsString) {
             return new NativeString((CharSequence)obj);
         } else if (obj instanceof Object[]) { // extension
             return new NativeArray((Object[])obj);
         } else if (obj instanceof double[]) { // extension
             return new NativeArray((double[])obj);
         } else if (obj instanceof long[]) {
             return new NativeArray((long[])obj);
         } else if (obj instanceof int[]) {
             return new NativeArray((int[])obj);
         } else {
             // FIXME: more special cases? Map? List?
             return obj;
         }
     }
     @Override
     public GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
         if (self instanceof String || self instanceof ConsString) {
             return NativeString.lookupPrimitive(request, self);
         } else if (self instanceof Number) {
             return NativeNumber.lookupPrimitive(request, self);
         } else if (self instanceof Boolean) {
             return NativeBoolean.lookupPrimitive(request, self);
         }
         throw new IllegalArgumentException("Unsupported primitive: " + self);
     }
     @Override
     public ScriptObject newObject() {
         return newEmptyInstance();
     }
     @Override
     public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
         // When the [[DefaultValue]] internal method of O is called with no hint,
         // then it behaves as if the hint were Number, unless O is a Date object
         // in which case it behaves as if the hint were String.
         Class<?> hint = typeHint;
         if (hint == null) {
             hint = Number.class;
         }
         try {
             if (hint == String.class) {
                 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
                 if (toString instanceof ScriptFunction) {
                     final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
                 if (valueOf instanceof ScriptFunction) {
                     final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 typeError(this, "cannot.get.default.string");
             }
             if (hint == Number.class) {
                 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
                 if (valueOf instanceof ScriptFunction) {
                     final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
                 if (toString instanceof ScriptFunction) {
                     final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 typeError(this, "cannot.get.default.number");
             }
         } catch (final RuntimeException | Error e) {
             throw e;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
         return UNDEFINED;
     }
     @Override
     public boolean isError(final ScriptObject sobj) {
         final ScriptObject errorProto = getErrorPrototype();
         ScriptObject proto = sobj.getProto();
         while (proto != null) {
             if (proto == errorProto) {
                 return true;
             }
             proto = proto.getProto();
         }
         return false;
     }
     @Override
     public ScriptObject newError(final String msg) {
         return new NativeError(msg);
     }
     @Override
     public ScriptObject newEvalError(final String msg) {
         return new NativeEvalError(msg);
     }
     @Override
     public ScriptObject newRangeError(final String msg) {
         return new NativeRangeError(msg);
     }
     @Override
     public ScriptObject newReferenceError(final String msg) {
         return new NativeReferenceError(msg);
     }
     @Override
     public ScriptObject newSyntaxError(final String msg) {
         return new NativeSyntaxError(msg);
     }
     @Override
     public ScriptObject newTypeError(final String msg) {
         return new NativeTypeError(msg);
     }
     @Override
     public ScriptObject newURIError(final String msg) {
         return new NativeURIError(msg);
     }
     @Override
     public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
         return new GenericPropertyDescriptor(configurable, enumerable);
     }
     @Override
     public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
         return new DataPropertyDescriptor(configurable, enumerable, writable, value);
     }
     @Override
     public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
         final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set);
         final boolean strict = context._strict;
         if (get == null) {
             desc.delete(PropertyDescriptor.GET, strict);
         }
         if (set == null) {
             desc.delete(PropertyDescriptor.SET, strict);
         }
         return desc;
     }
     /**
      * Cache for compiled script classes.
      */
     @SuppressWarnings("serial")
     private static class ClassCache extends LinkedHashMap<Source, SoftReference<Class<?>>> {
         private final int size;
         ClassCache(int size) {
             super(size, 0.75f, true);
             this.size = size;
         }
         @Override
         protected boolean removeEldestEntry(final Map.Entry<Source, SoftReference<Class<?>>> eldest) {
             return size() >= size;
         }
     }
     // Class cache management
     @Override
     public Class<?> findCachedClass(final Source source) {
         assert classCache != null : "Class cache used without being initialized";
         SoftReference<Class<?>> ref = classCache.get(source);
         if (ref != null) {
             final Class<?> clazz = ref.get();
             if (clazz == null) {
                 classCache.remove(source);
             }
             return clazz;
         }
         return null;
     }
     @Override
     public void cacheClass(final Source source, final Class<?> clazz) {
         assert classCache != null : "Class cache used without being initialized";
         classCache.put(source, new SoftReference<Class<?>>(clazz));
     }
     /**
      * This is the eval used when 'indirect' eval call is made.
      *
      * var global = this;
      * global.eval("print('hello')");
      *
      * @param self  eval scope
      * @param str   eval string
      *
      * @return the result of eval
      */
     public static Object eval(final Object self, final Object str) {
         return directEval(self, str, UNDEFINED, UNDEFINED, UNDEFINED);
     }
     /**
      * Direct eval
      *
      * @param self     The scope of eval passed as 'self'
      * @param str      Evaluated code
      * @param callThis "this" to be passed to the evaluated code
      * @param location location of the eval call
      * @param strict   is eval called a strict mode code?
      *
      * @return the return value of the eval
      *
      * This is directly invoked from generated when eval(code) is called in user code
      */
     public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final Object strict) {
         if (!(str instanceof String || str instanceof ConsString)) {
             return str;
         }
         final Global global = Global.instance();
         final ScriptObject scope = (self instanceof ScriptObject) ? (ScriptObject)self : global;
         return global.context.eval(scope, str.toString(), callThis, location, Boolean.TRUE.equals(strict));
     }
     /**
      * Global print implementation - Nashorn extension
      *
      * @param self    scope
      * @param objects arguments to print
      *
      * @return result of print (undefined)
      */
     public static Object print(final Object self, final Object... objects) {
         return printImpl(false, objects);
     }
     /**
      * Global println implementation - Nashorn extension
      *
      * @param self    scope
      * @param objects arguments to print
      *
      * @return result of println (undefined)
      */
     public static Object println(final Object self, final Object... objects) {
         return printImpl(true, objects);
     }
     /**
      * Global load implementation - Nashorn extension
      *
      * @param self    scope
      * @param source  source to load
      *
      * @return result of load (undefined)
      *
      * @throws IOException if source could not be read
      */
     public static Object load(final Object self, final Object source) throws IOException {
         final Global global = Global.instance();
         final ScriptObject scope = (self instanceof ScriptObject) ? (ScriptObject)self : global;
         return global.context.load(scope, source);
     }
     /**
      * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
      *
      * @param self  self reference
      * @param code  exit code
      *
      * @return undefined (will never be reacheD)
      */
     public static Object exit(final Object self, final Object code) {
         System.exit(JSType.toInt32(code));
         return UNDEFINED;
     }
     ScriptObject getFunctionPrototype() {
         return ScriptFunction.getPrototype(builtinFunction);
     }
     ScriptObject getObjectPrototype() {
         return ScriptFunction.getPrototype(builtinObject);
     }
     ScriptObject getArrayPrototype() {
         return ScriptFunction.getPrototype(builtinArray);
     }
     ScriptObject getBooleanPrototype() {
         return ScriptFunction.getPrototype(builtinBoolean);
     }
     ScriptObject getNumberPrototype() {
         return ScriptFunction.getPrototype(builtinNumber);
     }
     ScriptObject getDatePrototype() {
         return ScriptFunction.getPrototype(builtinDate);
     }
     ScriptObject getRegExpPrototype() {
         return ScriptFunction.getPrototype(builtinRegExp);
     }
     ScriptObject getStringPrototype() {
         return ScriptFunction.getPrototype(builtinString);
     }
     ScriptObject getErrorPrototype() {
         return ScriptFunction.getPrototype(builtinError);
     }
     ScriptObject getEvalErrorPrototype() {
         return ScriptFunction.getPrototype(builtinEvalError);
     }
     ScriptObject getRangeErrorPrototype() {
         return ScriptFunction.getPrototype(builtinRangeError);
     }
     ScriptObject getReferenceErrorPrototype() {
         return ScriptFunction.getPrototype(builtinReferenceError);
     }
     ScriptObject getSyntaxErrorPrototype() {
         return ScriptFunction.getPrototype(builtinSyntaxError);
     }
     ScriptObject getTypeErrorPrototype() {
         return ScriptFunction.getPrototype(builtinTypeError);
     }
     ScriptObject getURIErrorPrototype() {
         return ScriptFunction.getPrototype(builtinURIError);
     }
     ScriptObject getJavaImporterPrototype() {
         return ScriptFunction.getPrototype(builtinJavaImporter);
     }
     ScriptObject getJSAdapterPrototype() {
         return ScriptFunction.getPrototype(builtinJSAdapter);
     }
     ScriptObject getArrayBufferPrototype() {
         return ScriptFunction.getPrototype(builtinArrayBuffer);
     }
     ScriptObject getInt8ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt8Array);
     }
     ScriptObject getUint8ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint8Array);
     }
     ScriptObject getUint8ClampedArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint8ClampedArray);
     }
     ScriptObject getInt16ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt16Array);
     }
     ScriptObject getUint16ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint16Array);
     }
     ScriptObject getInt32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt32Array);
     }
     ScriptObject getUint32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint32Array);
     }
     ScriptObject getFloat32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinFloat32Array);
     }
     ScriptObject getFloat64ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinFloat64Array);
     }
     private ScriptFunction getBuiltinArray() {
         return builtinArray;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin array has not been overridden
      */
     public static boolean isBuiltinArray() {
         final Global instance = Global.instance();
         return instance.array == instance.getBuiltinArray();
     }
     private ScriptFunction getBuiltinBoolean() {
         return builtinBoolean;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin boolean has not been overridden
      */
     public static boolean isBuiltinBoolean() {
         final Global instance = Global.instance();
         return instance._boolean == instance.getBuiltinBoolean();
     }
     private ScriptFunction getBuiltinDate() {
         return builtinDate;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin date has not been overridden
      */
     public static boolean isBuiltinDate() {
         final Global instance = Global.instance();
         return instance.date == instance.getBuiltinDate();
     }
     private ScriptFunction getBuiltinError() {
         return builtinError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin error has not been overridden
      */
     public static boolean isBuiltinError() {
         final Global instance = Global.instance();
         return instance.error == instance.getBuiltinError();
     }
     private ScriptFunction getBuiltinEvalError() {
         return builtinEvalError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin eval error has not been overridden
      */
     public static boolean isBuiltinEvalError() {
         final Global instance = Global.instance();
         return instance.evalError == instance.getBuiltinEvalError();
     }
     private ScriptFunction getBuiltinFunction() {
         return builtinFunction;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin function has not been overridden
      */
     public static boolean isBuiltinFunction() {
         final Global instance = Global.instance();
         return instance.function == instance.getBuiltinFunction();
     }
     private ScriptFunction getBuiltinJSAdapter() {
         return builtinJSAdapter;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin JSAdapter has not been overridden
      */
     public static boolean isBuiltinJSAdapter() {
         final Global instance = Global.instance();
         return instance.jsadapter == instance.getBuiltinJSAdapter();
     }
     private ScriptObject getBuiltinJSON() {
         return builtinJSON;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin JSON has has not been overridden
      */
     public static boolean isBuiltinJSON() {
         final Global instance = Global.instance();
         return instance.json == instance.getBuiltinJSON();
     }
     private ScriptObject getBuiltinJava() {
         return builtinJava;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java has not been overridden
      */
     public static boolean isBuiltinJava() {
         final Global instance = Global.instance();
         return instance.java == instance.getBuiltinJava();
     }
     private ScriptObject getBuiltinJavax() {
         return builtinJavax;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Javax has not been overridden
      */
     public static boolean isBuiltinJavax() {
         final Global instance = Global.instance();
         return instance.javax == instance.getBuiltinJavax();
     }
     private ScriptObject getBuiltinJavaImporter() {
         return builtinJavaImporter;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java importer has not been overridden
      */
     public static boolean isBuiltinJavaImporter() {
         final Global instance = Global.instance();
         return instance.javaImporter == instance.getBuiltinJavaImporter();
     }
     private ScriptObject getBuiltinMath() {
         return builtinMath;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin math has not been overridden
      */
     public static boolean isBuiltinMath() {
         final Global instance = Global.instance();
         return instance.math == instance.getBuiltinMath();
     }
     private ScriptFunction getBuiltinNumber() {
         return builtinNumber;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin number has not been overridden
      */
     public static boolean isBuiltinNumber() {
         final Global instance = Global.instance();
         return instance.number == instance.getBuiltinNumber();
     }
     private ScriptFunction getBuiltinObject() {
         return builtinObject;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin object has not been overridden
      */
     public static boolean isBuiltinObject() {
         final Global instance = Global.instance();
         return instance.object == instance.getBuiltinObject();
     }
     private ScriptObject getBuiltinPackages() {
         return builtinPackages;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin package has not been overridden
      */
     public static boolean isBuiltinPackages() {
         final Global instance = Global.instance();
         return instance.packages == instance.getBuiltinPackages();
     }
     private ScriptFunction getBuiltinRangeError() {
         return builtinRangeError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin range error has not been overridden
      */
     public static boolean isBuiltinRangeError() {
         final Global instance = Global.instance();
         return instance.rangeError == instance.getBuiltinRangeError();
     }
     private ScriptFunction getBuiltinReferenceError() {
         return builtinReferenceError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin reference error has not been overridden
      */
     public static boolean isBuiltinReferenceError() {
         final Global instance = Global.instance();
         return instance.referenceError == instance.getBuiltinReferenceError();
     }
     private ScriptFunction getBuiltinRegExp() {
         return builtinRegExp;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin regexp has not been overridden
      */
     public static boolean isBuiltinRegExp() {
         final Global instance = Global.instance();
         return instance.regexp == instance.getBuiltinRegExp();
     }
     private ScriptFunction getBuiltinString() {
         return builtinString;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java has not been overridden
      */
     public static boolean isBuiltinString() {
         final Global instance = Global.instance();
         return instance.string == instance.getBuiltinString();
     }
     private ScriptFunction getBuiltinSyntaxError() {
         return builtinSyntaxError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin syntax error has not been overridden
      */
     public static boolean isBuiltinSyntaxError() {
         final Global instance = Global.instance();
         return instance.syntaxError == instance.getBuiltinSyntaxError();
     }
     private ScriptFunction getBuiltinTypeError() {
         return builtinTypeError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin type error has not been overridden
      */
     public static boolean isBuiltinTypeError() {
         final Global instance = Global.instance();
         return instance.typeError == instance.getBuiltinTypeError();
     }
     private ScriptFunction getBuiltinURIError() {
         return builtinURIError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin URI error has not been overridden
      */
     public static boolean isBuiltinURIError() {
         final Global instance = Global.instance();
         return instance.uriError == instance.getBuiltinURIError();
     }
     @Override
     public String getClassName() {
         return "global";
     }
     /**
      * Copy function used to clone NativeRegExp objects.
      *
      * @param regexp a NativeRegExp to clone
      *
      * @return copy of the given regexp object
      */
     public static Object regExpCopy(final Object regexp) {
         return new NativeRegExp((NativeRegExp)regexp);
     }
     /**
      * Convert given object to NativeRegExp type.
      *
      * @param obj object to be converted
      * @return NativeRegExp instance
      */
     public static NativeRegExp toRegExp(final Object obj) {
         if (obj instanceof NativeRegExp) {
             return (NativeRegExp)obj;
         }
         return new NativeRegExp(JSType.toString(obj));
     }
     /**
      * ECMA 9.9 ToObject implementation
      *
      * @param obj  an item for which to run ToObject
      * @return ToObject version of given item
      */
     public static Object toObject(final Object obj) {
         if (obj == null || obj == UNDEFINED) {
             typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
         if (obj instanceof ScriptObject) {
             return obj;
         }
         return instance().wrapAsObject(obj);
     }
     /**
      * Allocate a new object array.
      *
      * @param initial object values.
      * @return the new array
      */
     public static NativeArray allocate(final Object[] initial) {
         return new NativeArray(initial);
     }
     /**
      * Allocate a new number array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final double[] initial) {
         return new NativeArray(initial);
     }
     /**
      * Allocate a new long array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final long[] initial) {
         return new NativeArray(initial);
     }
     /**
      * Allocate a new integer array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final int[] initial) {
         return new NativeArray(initial);
     }
     /**
      * Allocate a new object array for arguments.
      *
      * @param arguments initial arguments passed.
      * @param callee reference to the function that uses arguments object
      * @param numParams actual number of declared parameters
      *
      * @return the new array
      */
     public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
         return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
     }
     /**
      * Called from generated to check if given function is the builtin 'eval'. If
      * eval is used in a script, a lot of optimizations and assumptions cannot be done.
      *
      * @param  fn function object that is checked
      * @return true if fn is the builtin eval
      */
     public static boolean isEval(final Object fn) {
         return fn == Global.instance().builtinEval;
     }
     /**
      * Create a new RegExp object.
      *
      * @param expression Regular expression.
      * @param options    Search options.
      *
      * @return New RegExp object.
      */
     public static Object newRegExp(final String expression, final String options) {
         if (options == null) {
             return new NativeRegExp(expression);
         }
         return new NativeRegExp(expression, options);
     }
     /**
      * Get the object prototype
      *
      * @return the object prototype
      */
     public static ScriptObject objectPrototype() {
         return Global.instance().getObjectPrototype();
     }
     /**
      * Create a new empty object instance.
      *
      * @return New empty object.
      */
     public static ScriptObject newEmptyInstance() {
         final ScriptObject sobj = new JO$();
         sobj.setProto(objectPrototype());
         return sobj;
     }
     /**
      * Check if a given object is a ScriptObject, raises an exception if this is
      * not the case
      *
      * @param obj and object to check
      */
     public static void checkObject(final Object obj) {
         if (!(obj instanceof ScriptObject)) {
             typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
     }
     /**
      * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
      * if this object is null or undefined.
      *
      * @param obj an object to check
      */
     public static void checkObjectCoercible(final Object obj) {
         if (obj == null || obj == UNDEFINED) {
             typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
     }
     /**
      * Get the current split state.
      *
      * @return current split state
      */
     @Override
     public int getSplitState() {
         return splitState;
     }
     /**
      * Set the current split state.
      *
      * @param state current split state
      */
     @Override
     public void setSplitState(final int state) {
         splitState = state;
     }
     private void init() {
         assert Context.getGlobal() == this : "this global is not set as current";
         // initialize Function and Object constructor
         initFunctionAndObject();
         // Now fix Global's own proto.
         this.setProto(getObjectPrototype());
         // initialize global function properties
         this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
         this.parseInt           = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT);
         this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
         this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
         this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
         this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
         this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
         this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
         this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
         this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
         this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
         this.print              = ScriptFunctionImpl.makeFunction("print",      context._print_no_newline ? PRINT : PRINTLN);
         this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
         this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
         this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
         // built-in constructors
         this.builtinArray     = (ScriptFunction)initConstructor("Array");
         this.builtinBoolean   = (ScriptFunction)initConstructor("Boolean");
         this.builtinDate      = (ScriptFunction)initConstructor("Date");
         this.builtinJSON      = initConstructor("JSON");
         this.builtinJSAdapter = (ScriptFunction)initConstructor("JSAdapter");
         this.builtinMath      = initConstructor("Math");
         this.builtinNumber    = (ScriptFunction)initConstructor("Number");
         this.builtinRegExp    = (ScriptFunction)initConstructor("RegExp");
         this.builtinString    = (ScriptFunction)initConstructor("String");
         // initialize String.prototype.length to 0
         // add String.prototype.length
         final ScriptObject stringPrototype = getStringPrototype();
         stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
         // add Array.prototype.length
         final ScriptObject arrayPrototype = getArrayPrototype();
         arrayPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
         this.DEFAULT_DATE = new NativeDate(Double.NaN);
         // initialize default regexp object
         this.DEFAULT_REGEXP = new NativeRegExp("(?:)");
         // RegExp.prototype should behave like a RegExp object. So copy the
         // properties.
         final ScriptObject regExpProto = getRegExpPrototype();
         regExpProto.addBoundProperties(DEFAULT_REGEXP);
         // Error stuff
         initErrorObjects();
         // java access
         initJavaAccess();
         initTypedArray();
         if (context._scripting) {
             initScripting();
         }
         if (Context.DEBUG && System.getSecurityManager() == null) {
             initDebug();
         }
         copyBuiltins();
         // initialized with strings so that typeof will work as expected.
         this.__FILE__ = "";
         this.__DIR__  = "";
         this.__LINE__ = 0.0;
         // expose script (command line) arguments as "arguments" property of global
         final List<String> arguments = context.getOptions().getArguments();
         final Object argsObj = wrapAsObject(arguments.toArray());
         addOwnProperty("arguments", Attribute.NOT_ENUMERABLE, argsObj);
         if (context._scripting) {
             // synonym for "arguments" in scripting mode
             addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, argsObj);
         }
     }
     private void initErrorObjects() {
         // Error objects
         this.builtinError = (ScriptFunction)initConstructor("Error");
         final ScriptObject errorProto = getErrorPrototype();
         final boolean strict = Global.isStrict();
         // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
         final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
         final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
         errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
         final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
         final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
         errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
         final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
         final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
         errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
         final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
         final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
         errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
         // ECMA 15.11.4.2 Error.prototype.name
         // Error.prototype.name = "Error";
         errorProto.set(NativeError.NAME, "Error", strict);
         // ECMA 15.11.4.3 Error.prototype.message
         // Error.prototype.message = "";
         errorProto.set(NativeError.MESSAGE, "", strict);
         this.builtinEvalError = initErrorSubtype("EvalError", errorProto);
         this.builtinRangeError = initErrorSubtype("RangeError", errorProto);
         this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
         this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
         this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
         this.builtinURIError = initErrorSubtype("URIError", errorProto);
     }
     private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
         final ScriptObject cons = initConstructor(name);
         final ScriptObject prototype = ScriptFunction.getPrototype(cons);
         final boolean strict = Global.isStrict();
         prototype.set(NativeError.NAME, name, strict);
         prototype.set(NativeError.MESSAGE, "", strict);
         prototype.setProto(errorProto);
         return (ScriptFunction)cons;
     }
     private void initJavaAccess() {
         final ScriptObject objectProto = getObjectPrototype();
         this.builtinPackages = new NativeJavaPackage("", objectProto);
         this.builtinJava = new NativeJavaPackage("java", objectProto);
         this.builtinJavax = new NativeJavaPackage("javax", objectProto);
         this.builtinJavaImporter = initConstructor("JavaImporter");
         this.builtinJavaApi = initConstructor("Java");
     }
     private void initScripting() {
         Object value;
         value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
         addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
         value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
         addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
         final String execName = ScriptingFunctions.EXEC_NAME;
         value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
         addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
         // Nashorn extension: global.echo (scripting-mode-only)
         // alias for "print"
         value = get("print");
         addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
         // Nashorn extension: global.$OPTIONS (scripting-mode-only)
         value = new OptionsObject(context);
         addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, value);
         // Nashorn extension: global.$ENV (scripting-mode-only)
         if (System.getSecurityManager() == null) {
             // do not fill $ENV if we have a security manager around
             // Retrieve current state of ENV variables.
             final ScriptObject env = newEmptyInstance();
             env.putAll(System.getenv());
             addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
         } else {
             addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         }
         // add other special properties for exec support
         addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
     }
     private void initTypedArray() {
         this.builtinArrayBuffer       = initConstructor("ArrayBuffer");
         this.builtinInt8Array         = initConstructor("Int8Array");
         this.builtinUint8Array        = initConstructor("Uint8Array");
         this.builtinUint8ClampedArray = initConstructor("Uint8ClampedArray");
         this.builtinInt16Array        = initConstructor("Int16Array");
         this.builtinUint16Array       = initConstructor("Uint16Array");
         this.builtinInt32Array        = initConstructor("Int32Array");
         this.builtinUint32Array       = initConstructor("Uint32Array");
         this.builtinFloat32Array      = initConstructor("Float32Array");
         this.builtinFloat64Array      = initConstructor("Float64Array");
     }
     private void copyBuiltins() {
         this.array             = this.builtinArray;
         this._boolean          = this.builtinBoolean;
         this.date              = this.builtinDate;
         this.error             = this.builtinError;
         this.evalError         = this.builtinEvalError;
         this.function          = this.builtinFunction;
         this.jsadapter         = this.builtinJSAdapter;
         this.json              = this.builtinJSON;
         this.java              = this.builtinJava;
         this.javax             = this.builtinJavax;
         this.javaImporter      = this.builtinJavaImporter;
         this.javaApi           = this.builtinJavaApi;
         this.math              = this.builtinMath;
         this.number            = this.builtinNumber;
         this.object            = this.builtinObject;
         this.packages          = this.builtinPackages;
         this.rangeError        = this.builtinRangeError;
         this.referenceError    = this.builtinReferenceError;
         this.regexp            = this.builtinRegExp;
         this.string            = this.builtinString;
         this.syntaxError       = this.builtinSyntaxError;
         this.typeError         = this.builtinTypeError;
         this.uriError          = this.builtinURIError;
         this.arrayBuffer       = this.builtinArrayBuffer;
         this.int8Array         = this.builtinInt8Array;
         this.uint8Array        = this.builtinUint8Array;
         this.uint8ClampedArray = this.builtinUint8ClampedArray;
         this.int16Array        = this.builtinInt16Array;
         this.uint16Array       = this.builtinUint16Array;
         this.int32Array        = this.builtinInt32Array;
         this.uint32Array       = this.builtinUint32Array;
         this.float32Array      = this.builtinFloat32Array;
         this.float64Array      = this.builtinFloat64Array;
     }
     private void initDebug() {
         this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug"));
     }
     @SuppressWarnings("resource")
     private static Object printImpl(final boolean newLine, final Object... objects) {
         final PrintWriter out = Global.getThisContext().getOut();
         boolean first = true;
         for (final Object object : objects) {
             if (first) {
                 first = false;
             } else {
                 out.print(' ');
             }
             out.print(JSType.toString(object));
         }
         if (newLine) {
             out.println();
         }
         out.flush();
         return UNDEFINED;
     }
     /**
      * These classes are generated by nasgen tool and so we have to use
      * reflection to load and create new instance of these classes.
      */
     private ScriptObject initConstructor(final String name) {
         try {
             // Assuming class name pattern for built-in JS constructors.
             final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
             sb.append("Native");
             sb.append(name);
             sb.append("$Constructor");
             final Class<?>     funcClass = Class.forName(sb.toString());
             final ScriptObject res       = (ScriptObject)funcClass.newInstance();
             if (res instanceof ScriptFunction) {
                 // All global constructor prototypes are not-writable,
                 // not-enumerable and not-configurable.
                 final ScriptFunction func = (ScriptFunction)res;
                 func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
             }
             if (res.getProto() == null) {
                 res.setProto(getObjectPrototype());
             }
             return res;
         } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
             throw new RuntimeException(e);
         }
     }
     // Function and Object constructors are inter-dependent. Also,
     // Function.prototype
     // functions are not properly initialized. We fix the references here.
     // NOTE: be careful if you want to re-order the operations here. You may
     // have
     // to play with object references carefully!!
     private void initFunctionAndObject() {
         // First-n-foremost is Function
         this.builtinFunction = (ScriptFunction)initConstructor("Function");
         // create global anonymous function
         final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
         // need to copy over members of Function.prototype to anon function
         anon.addBoundProperties(getFunctionPrototype());
         // Function.prototype === Object.getPrototypeOf(Function) ===
         // <anon-function>
         builtinFunction.setProto(anon);
         builtinFunction.setPrototype(anon);
         anon.set("constructor", builtinFunction, anon.isStrict());
         anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
         // now initialize Object
         this.builtinObject = (ScriptFunction)initConstructor("Object");
         final ScriptObject ObjectPrototype = getObjectPrototype();
         // Object.getPrototypeOf(Function.prototype) === Object.prototype
         anon.setProto(ObjectPrototype);
         // Function valued properties of Function.prototype were not properly
         // initialized. Because, these were created before global.function and
         // global.object were not initialized.
         jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
         for (final jdk.nashorn.internal.runtime.Property property : properties) {
             final Object key = property.getKey();
             final Object value = builtinFunction.get(key);
             if (value instanceof ScriptFunction && value != anon) {
                 final ScriptFunction func = (ScriptFunction)value;
                 func.setProto(getFunctionPrototype());
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setProto(ObjectPrototype);
                 }
             }
         }
         // For function valued properties of Object and Object.prototype, make
         // sure prototype's proto chain ends with Object.prototype
         for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
             final Object key = property.getKey();
             final Object value = builtinObject.get(key);
             if (value instanceof ScriptFunction) {
                 final ScriptFunction func = (ScriptFunction)value;
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setProto(ObjectPrototype);
                 }
             }
         }
         properties = getObjectPrototype().getMap().getProperties();
         for (final jdk.nashorn.internal.runtime.Property property : properties) {
             final Object key   = property.getKey();
             final Object value = ObjectPrototype.get(key);
             if (key.equals("constructor")) {
                 continue;
             }
             if (value instanceof ScriptFunction) {
                 final ScriptFunction func = (ScriptFunction)value;
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setProto(ObjectPrototype);
                 }
             }
         }
     }
     private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) {
         return MH.findStatic(MethodHandles.publicLookup(), Global.class, name, MH.type(rtype, types));
     }
     RegExpMatch getLastRegExpMatch() {
         return lastRegExpMatch;
     }
     void setLastRegExpMatch(RegExpMatch regExpMatch) {
         this.lastRegExpMatch = regExpMatch;
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/Global.java@d50e1752f59b (annotated)

src/jdk/nashorn/internal/objects/Global.java