jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/NativeJSON.java@9ee8fd4a7266 (annotated)

src/jdk/nashorn/internal/objects/NativeJSON.java@9ee8fd4a7266 (annotated)

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

Mon, 22 Sep 2014 13:28:28 +0200

author: hannesw
date: Mon, 22 Sep 2014 13:28:28 +0200
changeset 1020: 9ee8fd4a7266
parent 962: ac62e33a99b0
child 1205: 4112748288bb
child 1251: 85a6a7545dbe
permissions: -rw-r--r--

8047764: Indexed or polymorphic set on global affects Object.prototype
Reviewed-by: lagergren, attila

 /*
  * 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 java.lang.invoke.MethodHandle;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.IdentityHashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Callable;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Function;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ConsString;
 import jdk.nashorn.internal.runtime.JSONFunctions;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.ScriptFunction;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator;
 import jdk.nashorn.internal.runtime.linker.Bootstrap;
 import jdk.nashorn.internal.runtime.linker.InvokeByName;
 /**
  * ECMAScript 262 Edition 5, Section 15.12 The NativeJSON Object
  *
  */
 @ScriptClass("JSON")
 public final class NativeJSON extends ScriptObject {
     private static final Object TO_JSON = new Object();
     private static InvokeByName getTO_JSON() {
         return Global.instance().getInvokeByName(TO_JSON,
                 new Callable<InvokeByName>() {
                     @Override
                     public InvokeByName call() {
                         return new InvokeByName("toJSON", ScriptObject.class, Object.class, Object.class);
                     }
                 });
     }
     private static final Object REPLACER_INVOKER = new Object();
     private static MethodHandle getREPLACER_INVOKER() {
         return Global.instance().getDynamicInvoker(REPLACER_INVOKER,
                 new Callable<MethodHandle>() {
                     @Override
                     public MethodHandle call() {
                         return Bootstrap.createDynamicInvoker("dyn:call", Object.class,
                             ScriptFunction.class, ScriptObject.class, Object.class, Object.class);
                     }
                 });
     }
     // initialized by nasgen
     @SuppressWarnings("unused")
     private static PropertyMap $nasgenmap$;
     private NativeJSON() {
         // don't create me!!
         throw new UnsupportedOperationException();
     }
     /**
      * ECMA 15.12.2 parse ( text [ , reviver ] )
      *
      * @param self     self reference
      * @param text     a JSON formatted string
      * @param reviver  optional value: function that takes two parameters (key, value)
      *
      * @return an ECMA script value
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
     public static Object parse(final Object self, final Object text, final Object reviver) {
         return JSONFunctions.parse(text, reviver);
     }
     /**
      * ECMA 15.12.3 stringify ( value [ , replacer [ , space ] ] )
      *
      * @param self     self reference
      * @param value    ECMA script value (usually object or array)
      * @param replacer either a function or an array of strings and numbers
      * @param space    optional parameter - allows result to have whitespace injection
      *
      * @return a string in JSON format
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
     public static Object stringify(final Object self, final Object value, final Object replacer, final Object space) {
         // The stringify method takes a value and an optional replacer, and an optional
         // space parameter, and returns a JSON text. The replacer can be a function
         // that can replace values, or an array of strings that will select the keys.
         // A default replacer method can be provided. Use of the space parameter can
         // produce text that is more easily readable.
         final StringifyState state = new StringifyState();
         // If there is a replacer, it must be a function or an array.
         if (replacer instanceof ScriptFunction) {
             state.replacerFunction = (ScriptFunction) replacer;
         } else if (isArray(replacer) ||
                 replacer instanceof Iterable ||
                 (replacer != null && replacer.getClass().isArray())) {
             state.propertyList = new ArrayList<>();
             final Iterator<Object> iter = ArrayLikeIterator.arrayLikeIterator(replacer);
             while (iter.hasNext()) {
                 String item = null;
                 final Object v = iter.next();
                 if (v instanceof String) {
                     item = (String) v;
                 } else if (v instanceof ConsString) {
                     item = v.toString();
                 } else if (v instanceof Number ||
                         v instanceof NativeNumber ||
                         v instanceof NativeString) {
                     item = JSType.toString(v);
                 }
                 if (item != null) {
                     state.propertyList.add(item);
                 }
             }
         }
         // If the space parameter is a number, make an indent
         // string containing that many spaces.
         String gap;
         // modifiable 'space' - parameter is final
         Object modSpace = space;
         if (modSpace instanceof NativeNumber) {
             modSpace = JSType.toNumber(JSType.toPrimitive(modSpace, Number.class));
         } else if (modSpace instanceof NativeString) {
             modSpace = JSType.toString(JSType.toPrimitive(modSpace, String.class));
         }
         if (modSpace instanceof Number) {
             final int indent = Math.min(10, JSType.toInteger(modSpace));
             if (indent < 1) {
                 gap = "";
             } else {
                 final StringBuilder sb = new StringBuilder();
                 for (int i = 0; i < indent; i++) {
                     sb.append(' ');
                 }
                 gap = sb.toString();
             }
         } else if (modSpace instanceof String || modSpace instanceof ConsString) {
             final String str = modSpace.toString();
             gap = str.substring(0, Math.min(10, str.length()));
         } else {
             gap = "";
         }
         state.gap = gap;
         final ScriptObject wrapper = Global.newEmptyInstance();
         wrapper.set("", value, 0);
         return str("", wrapper, state);
     }
     // -- Internals only below this point
     // stringify helpers.
     private static class StringifyState {
         final Map<ScriptObject, ScriptObject> stack = new IdentityHashMap<>();
         StringBuilder  indent = new StringBuilder();
         String         gap = "";
         List<String>   propertyList = null;
         ScriptFunction replacerFunction = null;
     }
     // Spec: The abstract operation Str(key, holder).
     private static Object str(final Object key, final ScriptObject holder, final StringifyState state) {
         Object value = holder.get(key);
         try {
             if (value instanceof ScriptObject) {
                 final InvokeByName toJSONInvoker = getTO_JSON();
                 final ScriptObject svalue = (ScriptObject)value;
                 final Object toJSON = toJSONInvoker.getGetter().invokeExact(svalue);
                 if (Bootstrap.isCallable(toJSON)) {
                     value = toJSONInvoker.getInvoker().invokeExact(toJSON, svalue, key);
                 }
             }
             if (state.replacerFunction != null) {
                 value = getREPLACER_INVOKER().invokeExact(state.replacerFunction, holder, key, value);
             }
         } catch(Error|RuntimeException t) {
             throw t;
         } catch(final Throwable t) {
             throw new RuntimeException(t);
         }
         final boolean isObj = (value instanceof ScriptObject);
         if (isObj) {
             if (value instanceof NativeNumber) {
                 value = JSType.toNumber(value);
             } else if (value instanceof NativeString) {
                 value = JSType.toString(value);
             } else if (value instanceof NativeBoolean) {
                 value = ((NativeBoolean)value).booleanValue();
             }
         }
         if (value == null) {
             return "null";
         } else if (Boolean.TRUE.equals(value)) {
             return "true";
         } else if (Boolean.FALSE.equals(value)) {
             return "false";
         }
         if (value instanceof String) {
             return JSONFunctions.quote((String)value);
         } else if (value instanceof ConsString) {
             return JSONFunctions.quote(value.toString());
         }
         if (value instanceof Number) {
             return JSType.isFinite(((Number)value).doubleValue()) ? JSType.toString(value) : "null";
         }
         final JSType type = JSType.of(value);
         if (type == JSType.OBJECT) {
             if (isArray(value)) {
                 return JA((ScriptObject)value, state);
             } else if (value instanceof ScriptObject) {
                 return JO((ScriptObject)value, state);
             }
         }
         return UNDEFINED;
     }
     // Spec: The abstract operation JO(value) serializes an object.
     private static String JO(final ScriptObject value, final StringifyState state) {
         if (state.stack.containsKey(value)) {
             throw typeError("JSON.stringify.cyclic");
         }
         state.stack.put(value, value);
         final StringBuilder stepback = new StringBuilder(state.indent.toString());
         state.indent.append(state.gap);
         final StringBuilder finalStr = new StringBuilder();
         final List<Object>  partial  = new ArrayList<>();
         final List<String>  k        = state.propertyList == null ? Arrays.asList(value.getOwnKeys(false)) : state.propertyList;
         for (final Object p : k) {
             final Object strP = str(p, value, state);
             if (strP != UNDEFINED) {
                 final StringBuilder member = new StringBuilder();
                 member.append(JSONFunctions.quote(p.toString())).append(':');
                 if (!state.gap.isEmpty()) {
                     member.append(' ');
                 }
                 member.append(strP);
                 partial.add(member);
             }
         }
         if (partial.isEmpty()) {
             finalStr.append("{}");
         } else {
             if (state.gap.isEmpty()) {
                 final int size = partial.size();
                 int       index = 0;
                 finalStr.append('{');
                 for (final Object str : partial) {
                     finalStr.append(str);
                     if (index < size - 1) {
                         finalStr.append(',');
                     }
                     index++;
                 }
                 finalStr.append('}');
             } else {
                 final int size  = partial.size();
                 int       index = 0;
                 finalStr.append("{\n");
                 finalStr.append(state.indent);
                 for (final Object str : partial) {
                     finalStr.append(str);
                     if (index < size - 1) {
                         finalStr.append(",\n");
                         finalStr.append(state.indent);
                     }
                     index++;
                 }
                 finalStr.append('\n');
                 finalStr.append(stepback);
                 finalStr.append('}');
             }
         }
         state.stack.remove(value);
         state.indent = stepback;
         return finalStr.toString();
     }
     // Spec: The abstract operation JA(value) serializes an array.
     private static Object JA(final ScriptObject value, final StringifyState state) {
         if (state.stack.containsKey(value)) {
             throw typeError("JSON.stringify.cyclic");
         }
         state.stack.put(value, value);
         final StringBuilder stepback = new StringBuilder(state.indent.toString());
         state.indent.append(state.gap);
         final List<Object> partial = new ArrayList<>();
         final int length = JSType.toInteger(value.getLength());
         int index = 0;
         while (index < length) {
             Object strP = str(index, value, state);
             if (strP == UNDEFINED) {
                 strP = "null";
             }
             partial.add(strP);
             index++;
         }
         final StringBuilder finalStr = new StringBuilder();
         if (partial.isEmpty()) {
             finalStr.append("[]");
         } else {
             if (state.gap.isEmpty()) {
                 final int size = partial.size();
                 index = 0;
                 finalStr.append('[');
                 for (final Object str : partial) {
                     finalStr.append(str);
                     if (index < size - 1) {
                         finalStr.append(',');
                     }
                     index++;
                 }
                 finalStr.append(']');
             } else {
                 final int size = partial.size();
                 index = 0;
                 finalStr.append("[\n");
                 finalStr.append(state.indent);
                 for (final Object str : partial) {
                     finalStr.append(str);
                     if (index < size - 1) {
                         finalStr.append(",\n");
                         finalStr.append(state.indent);
                     }
                     index++;
                 }
                 finalStr.append('\n');
                 finalStr.append(stepback);
                 finalStr.append(']');
             }
         }
         state.stack.remove(value);
         state.indent = stepback;
         return finalStr.toString();
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/NativeJSON.java@9ee8fd4a7266 (annotated)

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