net.sourceforge.htmlunit.corejs.javascript
Class Synchronizer

java.lang.Object
  net.sourceforge.htmlunit.corejs.javascript.Delegator
      net.sourceforge.htmlunit.corejs.javascript.Synchronizer

All Implemented Interfaces:

Callable, Function, Scriptable

public class Synchronizer
extends Delegator

This class provides support for implementing Java-style synchronized methods in Javascript. Synchronized functions are created from ordinary Javascript functions by the Synchronizer constructor, e.g. new Packages.net.sourceforge.htmlunit.corejs.javascript.Synchronizer(fun) . The resulting object is a function that establishes an exclusive lock on the this object of its invocation. The Rhino shell provides a short-cut for the creation of synchronized methods: sync(fun) has the same effect as calling the above constructor.

Author:

Matthias Radestock

See Also:

Delegator

Field Summary

Fields inherited from class net.sourceforge.htmlunit.corejs.javascript.Delegator

obj

Fields inherited from interface net.sourceforge.htmlunit.corejs.javascript.Scriptable

NOT_FOUND

Constructor Summary

Synchronizer(Scriptable obj)
Create a new synchronized function from an existing one.

Synchronizer(Scriptable obj, java.lang.Object syncObject)
Create a new synchronized function from an existing one using an explicit object as synchronization object.

Method Summary

java.lang.Object

call(Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args) Call the function.

Methods inherited from class net.sourceforge.htmlunit.corejs.javascript.Delegator

construct, delete, delete, get, get, getClassName, getDefaultValue, getDelegee, getIds, getParentScope, getPrototype, has, has, hasInstance, newInstance, put, put, setDelegee, setParentScope, setPrototype

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Synchronizer

public Synchronizer(Scriptable obj)

Create a new synchronized function from an existing one.

Parameters:

obj - the existing function

Synchronizer

public Synchronizer(Scriptable obj,
                    java.lang.Object syncObject)

Create a new synchronized function from an existing one using an explicit object as synchronization object.

Parameters:

obj - the existing function

syncObject - the object to synchronized on

Method Detail

call

public java.lang.Object call(Context cx,
                             Scriptable scope,
                             Scriptable thisObj,
                             java.lang.Object[] args)

Description copied from interface: Function

Call the function. Note that the array of arguments is not guaranteed to have length greater than 0.

Specified by:

call in interface Callable

Specified by:

call in interface Function

Overrides:

call in class Delegator

Parameters:

cx - the current Context for this thread

scope - the scope to execute the function relative to. This is set to the value returned by getParentScope() except when the function is called from a closure.

thisObj - the JavaScript this object

args - the array of arguments

Returns:

the result of the call

See Also:

Function.call(net.sourceforge.htmlunit.corejs.javascript.Context, net.sourceforge.htmlunit.corejs.javascript.Scriptable, net.sourceforge.htmlunit.corejs.javascript.Scriptable, java.lang.Object[])