org.pepstock.charba.client.commons

Class CallbackPropertyHandler<T>

java.lang.Object

org.pepstock.charba.client.commons.CallbackPropertyHandler<T>

Type Parameters:

T - type of callback

public final class CallbackPropertyHandler<T>
extends Object

It is managing property where can set a callback.
It uses a cache in order to be able to use the callback even if defined at default or chart options level, both for chart or plugin options.

Author:

Andrea "Stock" Stocchero

Constructor Summary

Constructors

Constructor and Description
CallbackPropertyHandler(Key property) Creates the object storing the property key to manage.

Method Summary

Modifier and Type	Method and Description
T	getCallback(NativeObjectContainer container) Returns the callback stored in the native object or null if not exists.
T	getCallback(NativeObjectContainer container, T defaultValue) Returns the callback stored in the native object or the default value passed as argument, if not exists.
Key	getHashCodeProperty() Returns the property key used to store the class name plus hash code, as key of callback instance in the cache.
Key	getProperty() Returns the property key to manage
boolean	removeChartScope(String scope) Called by CallbackPropertyManager when a chart is destroy in order to remove the scope (and then teh callback if needed) from cache.
void	setCallback(AbstractNode container, String scope, T callback, CallbackProxy.Proxy proxy) Stores the callback in the the cache, storing the proxy function and the hash code property key (unique id of callback) in the native object.

Methods inherited from class java.lang.Object

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

Constructor Detail

CallbackPropertyHandler

public CallbackPropertyHandler(Key property)

Creates the object storing the property key to manage.

Parameters:

property - the property key to manage

Method Detail

getProperty

public Key getProperty()

Returns the property key to manage

Returns:

the property key to manage

getHashCodeProperty

public Key getHashCodeProperty()

Returns the property key used to store the class name plus hash code, as key of callback instance in the cache.

Returns:

the property key used to store the class name plus hash code, as key of callback instance in the cache

setCallback

public void setCallback(AbstractNode container,
                        String scope,
                        T callback,
                        CallbackProxy.Proxy proxy)

Stores the callback in the the cache, storing the proxy function and the hash code property key (unique id of callback) in the native object.

Parameters:

container - container instance of native object to use to store the properties

scope - the scope of callback, could be the default, chart type options, chart options, plugin objects, data sets

callback - the java callback instance to cache

proxy - the proxy java script function to store in the native object

getCallback

public T getCallback(NativeObjectContainer container)

Returns the callback stored in the native object or null if not exists.

Parameters:

container - container instance of native object to use to get the unique key to retrieve the callback from cache

Returns:

the callback stored in the native object or null if not exists

getCallback

public T getCallback(NativeObjectContainer container,
                     T defaultValue)

Returns the callback stored in the native object or the default value passed as argument, if not exists.

Parameters:

container - container instance of native object to use to get the unique key to retrieve the callback from cache

defaultValue - default value to return if the callback does not exist

Returns:

the callback stored in the native object or the default value passed as argument, if not exists

removeChartScope

public boolean removeChartScope(String scope)

Called by CallbackPropertyManager when a chart is destroy in order to remove the scope (and then teh callback if needed) from cache.

Parameters:

scope - the scope of the callback, is chart id

Returns:

true if this callback handler has got 1 or more scope related to charts.