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/*
* 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;
/**
* This interface can be implemented 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 interface.
*/
public interface 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
*/
public Object call(final Object thiz, final Object... args);
/**
* 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
*/
public Object newObject(final Object... args);
/**
* Evaluate a JavaScript expression.
*
* @param s JavaScript expression to evaluate
* @return evaluation result
*/
public Object eval(final String s);
/**
* Retrieves a named member of this JavaScript object.
*
* @param name of member
* @return member
*/
public Object getMember(final String name);
/**
* Retrieves an indexed member of this JavaScript object.
*
* @param index index slot to retrieve
* @return member
*/
public Object getSlot(final int index);
/**
* Does this object have a named member?
*
* @param name name of member
* @return true if this object has a member of the given name
*/
public boolean hasMember(final String name);
/**
* Does this object have a indexed property?
*
* @param slot index to check
* @return true if this object has a slot
*/
public boolean hasSlot(final int slot);
/**
* Remove a named member from this JavaScript object
*
* @param name name of the member
*/
public void removeMember(final String name);
/**
* Set a named member in this JavaScript object
*
* @param name name of the member
* @param value value of the member
*/
public void setMember(final String name, final Object value);
/**
* Set an indexed member in this JavaScript object
*
* @param index index of the member slot
* @param value value of the member
*/
public void setSlot(final int index, final Object value);
// property and value iteration
/**
* Returns the set of all property names of this object.
*
* @return set of property names
*/
public Set<String> keySet();
/**
* Returns the set of all property values of this object.
*
* @return set of property values.
*/
public Collection<Object> values();
// 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
*/
public boolean isInstance(final Object instance);
/**
* 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'
*/
public boolean isInstanceOf(final Object clazz);
/**
* ECMA [[Class]] property
*
* @return ECMA [[Class]] property value of this object
*/
public String getClassName();
/**
* Is this a function object?
*
* @return if this mirror wraps a ECMAScript function instance
*/
public boolean isFunction();
/**
* Is this a 'use strict' function object?
*
* @return true if this mirror represents a ECMAScript 'use strict' function
*/
public boolean isStrictFunction();
/**
* Is this an array object?
*
* @return if this mirror wraps a ECMAScript array object
*/
public boolean isArray();
/**
* Returns this object's numeric value.
*
* @return this object's numeric value.
*/
public double toNumber();
}
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