jdk8-mips64-public/nashorn: src/jdk/nashorn/api/scripting/ScriptObjectMirror.java@51a5ee93d6bc (annotated)

src/jdk/nashorn/api/scripting/ScriptObjectMirror.java@51a5ee93d6bc (annotated)

src/jdk/nashorn/api/scripting/ScriptObjectMirror.java

Mon, 24 Jun 2013 19:06:01 +0530

author: sundar
date: Mon, 24 Jun 2013 19:06:01 +0530
changeset 376: 51a5ee93d6bc
parent 350: 3d947baa33cc
child 414: ec84ba68ad39
permissions: -rw-r--r--

8015959: Can't call foreign constructor
Reviewed-by: jlaskey, hannesw

 /*
  * 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.api.scripting;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.Callable;
 import javax.script.Bindings;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.ScriptFunction;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.ScriptRuntime;
 /**
  * Mirror object that wraps a given ScriptObject instance. User can
  * access ScriptObject via the javax.script.Bindings interface or
  * netscape.javascript.JSObject interface.
  */
 public final class ScriptObjectMirror extends JSObject implements Bindings {
     private final ScriptObject sobj;
     private final ScriptObject global;
     ScriptObjectMirror(final ScriptObject sobj, final ScriptObject global) {
         this.sobj = sobj;
         this.global = global;
     }
     @Override
     public boolean equals(final Object other) {
         if (other instanceof ScriptObjectMirror) {
             return sobj.equals(((ScriptObjectMirror)other).sobj);
         }
         return false;
     }
     @Override
     public int hashCode() {
         return sobj.hashCode();
     }
     @Override
     public String toString() {
         return inGlobal(new Callable<String>() {
             @Override
             public String call() {
                 return ScriptRuntime.safeToString(sobj);
             }
         });
     }
     private <V> V inGlobal(final Callable<V> callable) {
         final ScriptObject oldGlobal = NashornScriptEngine.getNashornGlobal();
         final boolean globalChanged = (oldGlobal != global);
         if (globalChanged) {
             NashornScriptEngine.setNashornGlobal(global);
         }
         try {
             return callable.call();
         } catch (final RuntimeException e) {
             throw e;
         } catch (final Exception e) {
             throw new AssertionError("Cannot happen", e);
         } finally {
             if (globalChanged) {
                 NashornScriptEngine.setNashornGlobal(oldGlobal);
             }
         }
     }
     // JSObject methods
     @Override
     public Object call(final String functionName, final Object... args) {
         final ScriptObject oldGlobal = NashornScriptEngine.getNashornGlobal();
         final boolean globalChanged = (oldGlobal != global);
         try {
             if (globalChanged) {
                 NashornScriptEngine.setNashornGlobal(global);
             }
             final Object val = functionName == null? sobj : sobj.get(functionName);
             if (! (val instanceof ScriptFunction)) {
                 throw new RuntimeException("No such function " + ((functionName != null)? functionName : ""));
             }
             final Object[] modArgs = globalChanged? wrapArray(args, oldGlobal) : args;
             return wrap(ScriptRuntime.checkAndApply((ScriptFunction)val, sobj, unwrapArray(modArgs, global)), global);
         } catch (final RuntimeException | Error e) {
             throw e;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         } finally {
             if (globalChanged) {
                 NashornScriptEngine.setNashornGlobal(oldGlobal);
             }
         }
     }
     @Override
     public Object newObject(final String functionName, final Object... args) {
         final ScriptObject oldGlobal = NashornScriptEngine.getNashornGlobal();
         final boolean globalChanged = (oldGlobal != global);
         try {
             if (globalChanged) {
                 NashornScriptEngine.setNashornGlobal(global);
             }
             final Object val = functionName == null? sobj : sobj.get(functionName);
             if (! (val instanceof ScriptFunction)) {
                 throw new RuntimeException("not a constructor " + ((functionName != null)? functionName : ""));
             }
             final Object[] modArgs = globalChanged? wrapArray(args, oldGlobal) : args;
             return wrap(ScriptRuntime.checkAndConstruct((ScriptFunction)val, unwrapArray(modArgs, global)), global);
         } catch (final RuntimeException | Error e) {
             throw e;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         } finally {
             if (globalChanged) {
                 NashornScriptEngine.setNashornGlobal(oldGlobal);
             }
         }
     }
     @Override
     public Object eval(final String s) {
         return inGlobal(new Callable<Object>() {
             @Override
             public Object call() {
                 final Context context = AccessController.doPrivileged(
                         new PrivilegedAction<Context>() {
                             @Override
                             public Context run() {
                                 return Context.getContext();
                             }
                         });
                 return wrap(context.eval(global, s, null, null, false), global);
             }
         });
     }
     @Override
     public Object getMember(final String name) {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return wrap(sobj.get(name), global);
             }
         });
     }
     @Override
     public Object getSlot(final int index) {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return wrap(sobj.get(index), global);
             }
         });
     }
     @Override
     public void removeMember(final String name) {
         remove(name);
     }
     @Override
     public void setMember(final String name, final Object value) {
         put(name, value);
     }
     @Override
     public void setSlot(final int index, final Object value) {
         inGlobal(new Callable<Void>() {
             @Override public Void call() {
                 sobj.set(index, unwrap(value, global), global.isStrictContext());
                 return null;
             }
         });
     }
     @Override
     public void clear() {
         inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 sobj.clear();
                 return null;
             }
         });
     }
     @Override
     public boolean containsKey(final Object key) {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return sobj.containsKey(unwrap(key, global));
             }
         });
     }
     @Override
     public boolean containsValue(final Object value) {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return sobj.containsValue(unwrap(value, global));
             }
         });
     }
     @Override
     public Set<Map.Entry<String, Object>> entrySet() {
         return inGlobal(new Callable<Set<Map.Entry<String, Object>>>() {
             @Override public Set<Map.Entry<String, Object>> call() {
                 final Iterator<String>               iter    = sobj.propertyIterator();
                 final Set<Map.Entry<String, Object>> entries = new LinkedHashSet<>();
                 while (iter.hasNext()) {
                     final String key   = iter.next();
                     final Object value = translateUndefined(wrap(sobj.get(key), global));
                     entries.add(new AbstractMap.SimpleImmutableEntry<>(key, value));
                 }
                 return Collections.unmodifiableSet(entries);
             }
         });
     }
     @Override
     public Object get(final Object key) {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return translateUndefined(wrap(sobj.get(key), global));
             }
         });
     }
     @Override
     public boolean isEmpty() {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return sobj.isEmpty();
             }
         });
     }
     @Override
     public Set<String> keySet() {
         return inGlobal(new Callable<Set<String>>() {
             @Override public Set<String> call() {
                 final Iterator<String> iter   = sobj.propertyIterator();
                 final Set<String>      keySet = new LinkedHashSet<>();
                 while (iter.hasNext()) {
                     keySet.add(iter.next());
                 }
                 return Collections.unmodifiableSet(keySet);
             }
         });
     }
     @Override
     public Object put(final String key, final Object value) {
         final ScriptObject oldGlobal = NashornScriptEngine.getNashornGlobal();
         final boolean globalChanged = (oldGlobal != global);
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 final Object modValue = globalChanged? wrap(value, oldGlobal) : value;
                 return translateUndefined(wrap(sobj.put(key, unwrap(modValue, global)), global));
             }
         });
     }
     @Override
     public void putAll(final Map<? extends String, ? extends Object> map) {
         final ScriptObject oldGlobal = NashornScriptEngine.getNashornGlobal();
         final boolean globalChanged = (oldGlobal != global);
         final boolean strict = sobj.isStrictContext();
         inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 for (final Map.Entry<? extends String, ? extends Object> entry : map.entrySet()) {
                     final Object value = entry.getValue();
                     final Object modValue = globalChanged? wrap(value, oldGlobal) : value;
                     sobj.set(entry.getKey(), unwrap(modValue, global), strict);
                 }
                 return null;
             }
         });
     }
     @Override
     public Object remove(final Object key) {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return wrap(sobj.remove(unwrap(key, global)), global);
             }
         });
     }
     /**
      * Delete a property from this object.
      *
      * @param key the property to be deleted
      *
      * @return if the delete was successful or not
      */
     public boolean delete(final Object key) {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return sobj.delete(unwrap(key, global));
             }
         });
     }
     @Override
     public int size() {
         return inGlobal(new Callable<Integer>() {
             @Override public Integer call() {
                 return sobj.size();
             }
         });
     }
     @Override
     public Collection<Object> values() {
         return inGlobal(new Callable<Collection<Object>>() {
             @Override public Collection<Object> call() {
                 final List<Object>     values = new ArrayList<>(size());
                 final Iterator<Object> iter   = sobj.valueIterator();
                 while (iter.hasNext()) {
                     values.add(translateUndefined(wrap(iter.next(), global)));
                 }
                 return Collections.unmodifiableList(values);
             }
         });
     }
     // Support for ECMAScript Object API on mirrors
     /**
      * Return the __proto__ of this object.
      * @return __proto__ object.
      */
     public Object getProto() {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return wrap(getScriptObject().getProto(), global);
             }
         });
     }
     /**
      * ECMA 8.12.1 [[GetOwnProperty]] (P)
      *
      * @param key property key
      *
      * @return Returns the Property Descriptor of the named own property of this
      * object, or undefined if absent.
      */
     public Object getOwnPropertyDescriptor(final String key) {
         return inGlobal(new Callable<Object>() {
             @Override public Object call() {
                 return wrap(getScriptObject().getOwnPropertyDescriptor(key), global);
             }
         });
     }
     /**
      * return an array of own property keys associated with the object.
      *
      * @param all True if to include non-enumerable keys.
      * @return Array of keys.
      */
     public String[] getOwnKeys(final boolean all) {
         return inGlobal(new Callable<String[]>() {
             @Override public String[] call() {
                 return getScriptObject().getOwnKeys(all);
             }
         });
     }
     /**
      * Flag this script object as non extensible
      *
      * @return the object after being made non extensible
      */
     public ScriptObjectMirror preventExtensions() {
         return inGlobal(new Callable<ScriptObjectMirror>() {
             @Override public ScriptObjectMirror call() {
                 getScriptObject().preventExtensions();
                 return ScriptObjectMirror.this;
             }
         });
     }
     /**
      * Check if this script object is extensible
      * @return true if extensible
      */
     public boolean isExtensible() {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return getScriptObject().isExtensible();
             }
         });
     }
     /**
      * ECMAScript 15.2.3.8 - seal implementation
      * @return the sealed script object
      */
     public ScriptObjectMirror seal() {
         return inGlobal(new Callable<ScriptObjectMirror>() {
             @Override public ScriptObjectMirror call() {
                 getScriptObject().seal();
                 return ScriptObjectMirror.this;
             }
         });
     }
     /**
      * Check whether this script object is sealed
      * @return true if sealed
      */
     public boolean isSealed() {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return getScriptObject().isSealed();
             }
         });
     }
     /**
      * ECMA 15.2.39 - freeze implementation. Freeze this script object
      * @return the frozen script object
      */
     public ScriptObjectMirror freeze() {
         return inGlobal(new Callable<ScriptObjectMirror>() {
             @Override public ScriptObjectMirror call() {
                 getScriptObject().freeze();
                 return ScriptObjectMirror.this;
             }
         });
     }
     /**
      * Check whether this script object is frozen
      * @return true if frozen
      */
     public boolean isFrozen() {
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return getScriptObject().isFrozen();
             }
         });
     }
     // ECMAScript instanceof check
     /**
      * Checking whether a script object is an instance of another by
      * walking the proto chain
      *
      * @param instance instace to check
      * @return true if 'instance' is an instance of this object
      */
     public boolean isInstance(final ScriptObjectMirror instance) {
         // if not belongs to my global scope, return false
         if (instance == null || global != instance.global) {
             return false;
         }
         return inGlobal(new Callable<Boolean>() {
             @Override public Boolean call() {
                 return getScriptObject().isInstance(instance.getScriptObject());
             }
         });
     }
     /**
      * Utility to check if given object is ECMAScript undefined value
      *
      * @param obj object to check
      * @return true if 'obj' is ECMAScript undefined value
      */
     public static boolean isUndefined(final Object obj) {
         return obj == ScriptRuntime.UNDEFINED;
     }
     /**
      * is this a function object?
      *
      * @return if this mirror wraps a ECMAScript function instance
      */
     public boolean isFunction() {
         return getScriptObject() instanceof ScriptFunction;
     }
     /**
      * is this a 'use strict' function object?
      *
      * @return true if this mirror represents a ECMAScript 'use strict' function
      */
     public boolean isStrictFunction() {
         return isFunction() && ((ScriptFunction)getScriptObject()).isStrict();
     }
     /**
      * is this an array object?
      *
      * @return if this mirror wraps a ECMAScript array object
      */
     public boolean isArray() {
         return getScriptObject().isArray();
     }
     // These are public only so that Context can access these.
     /**
      * Make a script object mirror on given object if needed.
      *
      * @param obj object to be wrapped
      * @param homeGlobal global to which this object belongs
      * @return wrapped object
      */
     public static Object wrap(final Object obj, final ScriptObject homeGlobal) {
         return (obj instanceof ScriptObject) ? new ScriptObjectMirror((ScriptObject)obj, homeGlobal) : obj;
     }
     /**
      * Unwrap a script object mirror if needed.
      *
      * @param obj object to be unwrapped
      * @param homeGlobal global to which this object belongs
      * @return unwrapped object
      */
     public static Object unwrap(final Object obj, final ScriptObject homeGlobal) {
         if (obj instanceof ScriptObjectMirror) {
             final ScriptObjectMirror mirror = (ScriptObjectMirror)obj;
             return (mirror.global == homeGlobal)? mirror.sobj : obj;
         }
         return obj;
     }
     /**
      * Wrap an array of object to script object mirrors if needed.
      *
      * @param args array to be unwrapped
      * @param homeGlobal global to which this object belongs
      * @return wrapped array
      */
     public static Object[] wrapArray(final Object[] args, final ScriptObject homeGlobal) {
         if (args == null || args.length == 0) {
             return args;
         }
         final Object[] newArgs = new Object[args.length];
         int index = 0;
         for (final Object obj : args) {
             newArgs[index] = wrap(obj, homeGlobal);
             index++;
         }
         return newArgs;
     }
     /**
      * Unwrap an array of script object mirrors if needed.
      *
      * @param args array to be unwrapped
      * @param homeGlobal global to which this object belongs
      * @return unwrapped array
      */
     public static Object[] unwrapArray(final Object[] args, final ScriptObject homeGlobal) {
         if (args == null || args.length == 0) {
             return args;
         }
         final Object[] newArgs = new Object[args.length];
         int index = 0;
         for (final Object obj : args) {
             newArgs[index] = unwrap(obj, homeGlobal);
             index++;
         }
         return newArgs;
     }
     // package-privates below this.
     ScriptObject getScriptObject() {
         return sobj;
     }
     static Object translateUndefined(Object obj) {
         return (obj == ScriptRuntime.UNDEFINED)? null : obj;
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/api/scripting/ScriptObjectMirror.java@51a5ee93d6bc (annotated)

src/jdk/nashorn/api/scripting/ScriptObjectMirror.java