jdk8-mips64-public/nashorn: src/jdk/nashorn/api/scripting/AbstractJSObject.java@fb99aafd5c0d (annotated)

src/jdk/nashorn/api/scripting/AbstractJSObject.java@fb99aafd5c0d (annotated)

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

Wed, 03 Jun 2015 16:44:24 +0200

author: attila
date: Wed, 03 Jun 2015 16:44:24 +0200
changeset 1395: fb99aafd5c0d
parent 1250: 9ee1fc3f6136
child 1526: d731e6ba5037
permissions: -rw-r--r--

8081813: JSONListAdapter should delegate its [[DefaultValue]] to wrapped object
Reviewed-by: lagergren, sundar

 /*
  * 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.util.Collection;
 import java.util.Collections;
 import java.util.Set;
 import jdk.nashorn.internal.runtime.JSONListAdapter;
 import jdk.nashorn.internal.runtime.JSType;
 /**
  * This is the base class for nashorn ScriptObjectMirror class.
  *
  * This class can also be subclassed by an arbitrary Java class. Nashorn will
  * treat objects of such classes just like nashorn script objects. Usual nashorn
  * operations like obj[i], obj.foo, obj.func(), delete obj.foo will be glued
  * to appropriate method call of this class.
  *
  * @since 1.8u40
  */
 @jdk.Exported
 public abstract class AbstractJSObject implements JSObject {
     /**
      * Call this object as a JavaScript function. This is equivalent to
      * 'func.apply(thiz, args)' in JavaScript.
      *
      * @param thiz 'this' object to be passed to the function
      * @param args arguments to method
      * @return result of call
      */
     @Override
     public Object call(final Object thiz, final Object... args) {
         throw new UnsupportedOperationException("call");
     }
     /**
      * Call this 'constructor' JavaScript function to create a new object.
      * This is equivalent to 'new func(arg1, arg2...)' in JavaScript.
      *
      * @param args arguments to method
      * @return result of constructor call
      */
     @Override
     public Object newObject(final Object... args) {
         throw new UnsupportedOperationException("newObject");
     }
     /**
      * Evaluate a JavaScript expression.
      *
      * @param s JavaScript expression to evaluate
      * @return evaluation result
      */
     @Override
     public Object eval(final String s) {
         throw new UnsupportedOperationException("eval");
     }
     /**
      * Retrieves a named member of this JavaScript object.
      *
      * @param name of member
      * @return member
      */
     @Override
     public Object getMember(final String name) {
         return null;
     }
     /**
      * Retrieves an indexed member of this JavaScript object.
      *
      * @param index index slot to retrieve
      * @return member
      */
     @Override
     public Object getSlot(final int index) {
         return null;
     }
     /**
      * Does this object have a named member?
      *
      * @param name name of member
      * @return true if this object has a member of the given name
      */
     @Override
     public boolean hasMember(final String name) {
         return false;
     }
     /**
      * Does this object have a indexed property?
      *
      * @param slot index to check
      * @return true if this object has a slot
      */
     @Override
     public boolean hasSlot(final int slot) {
         return false;
     }
     /**
      * Remove a named member from this JavaScript object
      *
      * @param name name of the member
      */
     @Override
     public void removeMember(final String name) {
         //empty
     }
     /**
      * Set a named member in this JavaScript object
      *
      * @param name  name of the member
      * @param value value of the member
      */
     @Override
     public void setMember(final String name, final Object value) {
         //empty
     }
     /**
      * Set an indexed member in this JavaScript object
      *
      * @param index index of the member slot
      * @param value value of the member
      */
     @Override
     public void setSlot(final int index, final Object value) {
         //empty
     }
     // property and value iteration
     /**
      * Returns the set of all property names of this object.
      *
      * @return set of property names
      */
     @Override
     public Set<String> keySet() {
         return Collections.emptySet();
     }
     /**
      * Returns the set of all property values of this object.
      *
      * @return set of property values.
      */
     @Override
     public Collection<Object> values() {
         return Collections.emptySet();
     }
     // JavaScript instanceof check
     /**
      * Checking whether the given object is an instance of 'this' object.
      *
      * @param instance instace to check
      * @return true if the given 'instance' is an instance of this 'function' object
      */
     @Override
     public boolean isInstance(final Object instance) {
         return false;
     }
     /**
      * Checking whether this object is an instance of the given 'clazz' object.
      *
      * @param clazz clazz to check
      * @return true if this object is an instance of the given 'clazz'
      */
     @Override
     public boolean isInstanceOf(final Object clazz) {
         if (clazz instanceof JSObject) {
             return ((JSObject)clazz).isInstance(this);
         }
         return false;
     }
     /**
      * ECMA [[Class]] property
      *
      * @return ECMA [[Class]] property value of this object
      */
     @Override
     public String getClassName() {
         return getClass().getName();
     }
     /**
      * Is this a function object?
      *
      * @return if this mirror wraps a ECMAScript function instance
      */
     @Override
     public boolean isFunction() {
         return false;
     }
     /**
      * Is this a 'use strict' function object?
      *
      * @return true if this mirror represents a ECMAScript 'use strict' function
      */
     @Override
     public boolean isStrictFunction() {
         return false;
     }
     /**
      * Is this an array object?
      *
      * @return if this mirror wraps a ECMAScript array object
      */
     @Override
     public boolean isArray() {
         return false;
     }
     /**
      * Returns this object's numeric value.
      *
      * @return this object's numeric value.
      * @deprecated use {@link #getDefaultValue(Class)} with {@link Number} hint instead.
      */
     @Override @Deprecated
     public double toNumber() {
         return JSType.toNumber(JSType.toPrimitive(this, Number.class));
     }
     /**
      * Implements this object's {@code [[DefaultValue]]} method. The default implementation follows ECMAScript 5.1
      * section 8.6.2 but subclasses are free to provide their own implementations.
      *
      * @param hint the type hint. Should be either {@code null}, {@code Number.class} or {@code String.class}.
      * @return this object's default value.
      * @throws UnsupportedOperationException if the conversion can't be performed. The engine will convert this
      * exception into a JavaScript {@code TypeError}.
      */
     public Object getDefaultValue(final Class<?> hint) {
         return DefaultValueImpl.getDefaultValue(this, hint);
     }
     /**
      * When passed an {@link AbstractJSObject}, invokes its {@link #getDefaultValue(Class)} method. When passed any
      * other {@link JSObject}, it will obtain its {@code [[DefaultValue]]} method as per ECMAScript 5.1 section
      * 8.6.2.
      *
      * @param jsobj the {@link JSObject} whose {@code [[DefaultValue]]} is obtained.
      * @param hint the type hint. Should be either {@code null}, {@code Number.class} or {@code String.class}.
      * @return this object's default value.
      * @throws UnsupportedOperationException if the conversion can't be performed. The engine will convert this
      * exception into a JavaScript {@code TypeError}.
      */
     public static Object getDefaultValue(final JSObject jsobj, final Class<?> hint) {
         if (jsobj instanceof AbstractJSObject) {
             return ((AbstractJSObject)jsobj).getDefaultValue(hint);
         } else if (jsobj instanceof JSONListAdapter) {
             return ((JSONListAdapter)jsobj).getDefaultValue(hint);
         }
         return DefaultValueImpl.getDefaultValue(jsobj, hint);
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/api/scripting/AbstractJSObject.java@fb99aafd5c0d (annotated)

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