org.coliper.ibean.proxy.handler

Class LazyInitHandler

java.lang.Object

org.coliper.ibean.proxy.handler.StatefulExtensionHandler

org.coliper.ibean.proxy.handler.LazyInitHandler

All Implemented Interfaces:

ExtensionHandler

public class LazyInitHandler
extends StatefulExtensionHandler

ExtensionHandler implementation for bean extension interfaces LazyInit, LazyInitParent and LazyInitChild.

Field Summary

Fields

Modifier and Type	Field and Description
static ExtensionSupport	SUPPORT ExtensionSupport related to this handler supposed to be used when configuring extension handlers in IBeanFactorys, for example in ProxyIBeanFactory.Builder#withInterfaceSupport(ExtensionSupport).

Constructor Summary

Constructors

Constructor and Description
LazyInitHandler()

Method Summary

Modifier and Type	Method and Description
Object	interceptGetterCall(IBeanContext<?> context, IBeanFieldMetaInfo fieldMeta, Object returnValue, Object proxyInstance) Called as an optional hook with every getter call on an IBean.
void	onInitStateful(Object proxyInstance, IBeanTypeMetaInfo<?> metaInfo, IBeanFactory factory) Initialization method for stateful handlers that is called after initialization of the IBean.

Methods inherited from class org.coliper.ibean.proxy.handler.StatefulExtensionHandler

handleExtendedInterfaceCall

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.coliper.ibean.proxy.ExtensionHandler

interceptSetterCall

Field Detail

SUPPORT

public static final ExtensionSupport SUPPORT

ExtensionSupport related to this handler supposed to be used when configuring extension handlers in IBeanFactorys, for example in ProxyIBeanFactory.Builder#withInterfaceSupport(ExtensionSupport).

Constructor Detail

LazyInitHandler

public LazyInitHandler()

Method Detail

onInitStateful

public void onInitStateful(Object proxyInstance,
                           IBeanTypeMetaInfo<?> metaInfo,
                           IBeanFactory factory)

Description copied from interface: ExtensionHandler

Initialization method for stateful handlers that is called after initialization of the IBean. If a handler is registered as stateful a new instance of the ExtensionHandler implementation is created for each new IBean. After the IBean itself and all handlers created this method is called on all stateful handlers. This method should therefore be overwritten if a handler needs some initialization after creation.

The default implementation does nothing.

Parameters:

proxyInstance - the IBean instance

metaInfo - meta information about the IBean

factory - the factory that creates the IBean instance

interceptGetterCall

public Object interceptGetterCall(IBeanContext<?> context,
                                  IBeanFieldMetaInfo fieldMeta,
                                  Object returnValue,
                                  Object proxyInstance)

Description copied from interface: ExtensionHandler

Called as an optional hook with every getter call on an IBean. Getter calls on IBeans are handled by the IBean implementation itself but an ExtensionHandler can implement this method to hook into the getter call. It can just peak on the return value or it can even change it or throw an exception.

When you have several extension handlers registered for an IBean type the intercept calls will be called in the order in which the handlers are registered in the ProxyIBeanFactory. See also ProxyIBeanFactory.Builder.withInterfaceSupport(ExtensionSupport).

The default implementation just returns returnValue.

Parameters:

context - provides meta information about the IBean

fieldMeta - provides meta information about the field related to the getter

returnValue - the current return value of the getter. This must not match to the field value of the IBean as the value might have already been changed by intercept calls from other handlers

proxyInstance - the IBean instance itself

Returns:

the value to be returned from the getter call. If you do not want to change the getter return value just pass the value provided in returnValue