author | sundar |
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/* |
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* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.nashorn.api.scripting; |
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import java.util.Collection; |
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import java.util.Set; |
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import jdk.nashorn.internal.runtime.JSType; |
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/** |
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* This interface can be implemented by an arbitrary Java class. Nashorn will |
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* treat objects of such classes just like nashorn script objects. Usual nashorn |
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* operations like obj[i], obj.foo, obj.func(), delete obj.foo will be delegated |
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* to appropriate method call of this interface. |
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* |
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* @since 1.8u40 |
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*/ |
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public interface JSObject { |
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/** |
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* Call this object as a JavaScript function. This is equivalent to |
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* 'func.apply(thiz, args)' in JavaScript. |
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* |
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* @param thiz 'this' object to be passed to the function. This may be null. |
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* @param args arguments to method |
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* @return result of call |
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*/ |
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public Object call(final Object thiz, final Object... args); |
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/** |
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* Call this 'constructor' JavaScript function to create a new object. |
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* This is equivalent to 'new func(arg1, arg2...)' in JavaScript. |
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* @param args arguments to method |
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* @return result of constructor call |
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*/ |
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public Object newObject(final Object... args); |
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/** |
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* Evaluate a JavaScript expression. |
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* |
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* @param s JavaScript expression to evaluate |
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* @return evaluation result |
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*/ |
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public Object eval(final String s); |
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/** |
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* Retrieves a named member of this JavaScript object. |
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* |
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* @param name of member |
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* @return member |
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* @throws NullPointerException if name is null |
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*/ |
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public Object getMember(final String name); |
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/** |
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* Retrieves an indexed member of this JavaScript object. |
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* |
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* @param index index slot to retrieve |
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* @return member |
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*/ |
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public Object getSlot(final int index); |
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/** |
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* Does this object have a named member? |
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* |
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* @param name name of member |
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* @return true if this object has a member of the given name |
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*/ |
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public boolean hasMember(final String name); |
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/** |
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* Does this object have a indexed property? |
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* |
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* @param slot index to check |
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* @return true if this object has a slot |
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*/ |
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public boolean hasSlot(final int slot); |
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/** |
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* Remove a named member from this JavaScript object |
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* |
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* @param name name of the member |
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* @throws NullPointerException if name is null |
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*/ |
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public void removeMember(final String name); |
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/** |
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* Set a named member in this JavaScript object |
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* |
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* @param name name of the member |
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* @param value value of the member |
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* @throws NullPointerException if name is null |
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*/ |
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public void setMember(final String name, final Object value); |
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/** |
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* Set an indexed member in this JavaScript object |
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* |
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* @param index index of the member slot |
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* @param value value of the member |
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*/ |
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public void setSlot(final int index, final Object value); |
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// property and value iteration |
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/** |
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* Returns the set of all property names of this object. |
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* |
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* @return set of property names |
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*/ |
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public Set<String> keySet(); |
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/** |
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* Returns the set of all property values of this object. |
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* |
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* @return set of property values. |
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*/ |
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public Collection<Object> values(); |
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// JavaScript instanceof check |
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/** |
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* Checking whether the given object is an instance of 'this' object. |
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* |
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* @param instance instance to check |
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* @return true if the given 'instance' is an instance of this 'function' object |
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*/ |
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public boolean isInstance(final Object instance); |
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/** |
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* Checking whether this object is an instance of the given 'clazz' object. |
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* |
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* @param clazz clazz to check |
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* @return true if this object is an instance of the given 'clazz' |
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*/ |
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public boolean isInstanceOf(final Object clazz); |
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/** |
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* ECMA [[Class]] property |
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* |
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* @return ECMA [[Class]] property value of this object |
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*/ |
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public String getClassName(); |
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/** |
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* Is this a function object? |
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* |
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* @return if this mirror wraps a ECMAScript function instance |
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*/ |
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public boolean isFunction(); |
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|
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/** |
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* Is this a 'use strict' function object? |
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* |
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* @return true if this mirror represents a ECMAScript 'use strict' function |
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*/ |
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public boolean isStrictFunction(); |
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|
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/** |
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* Is this an array object? |
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* |
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* @return if this mirror wraps a ECMAScript array object |
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*/ |
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public boolean isArray(); |
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|
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/** |
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* Returns this object's numeric value. |
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* |
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* @return this object's numeric value. |
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* @deprecated use {@link #getDefaultValue(Class)} with {@link Number} hint instead. |
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*/ |
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@Deprecated |
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default double toNumber() { |
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return JSType.toNumber(JSType.toPrimitive(this, Number.class)); |
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} |
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|
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/** |
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* Implements this object's {@code [[DefaultValue]]} method as per ECMAScript 5.1 section 8.6.2. |
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* |
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* @param hint the type hint. Should be either {@code null}, {@code Number.class} or {@code String.class}. |
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* @return this object's default value. |
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* @throws UnsupportedOperationException if the conversion can't be performed. The engine will convert this |
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* exception into a JavaScript {@code TypeError}. |
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*/ |
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default Object getDefaultValue(final Class<?> hint) throws UnsupportedOperationException { |
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return DefaultValueImpl.getDefaultValue(this, hint); |
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} |
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} |