bboss.org.apache.velocity.app.event

接口 EventHandlerMethodExecutor

所有已知实现类:

IncludeEventHandler.IncludeEventExecutor, InvalidReferenceEventHandler.InvalidGetMethodExecutor, InvalidReferenceEventHandler.InvalidMethodExecutor, InvalidReferenceEventHandler.InvalidSetMethodExecutor, MethodExceptionEventHandler.MethodExceptionExecutor, NullSetEventHandler.ShouldLogOnNullSetExecutor, ReferenceInsertionEventHandler.referenceInsertExecutor

public interface EventHandlerMethodExecutor

Strategy object used to execute event handler method. Will be called while looping through all the chained event handler implementations. Each EventHandler method call should have a parallel executor object defined.

从以下版本开始:

1.5

方法概要

限定符和类型	方法和说明
void	execute(EventHandler handler) Execute the event handler method.
java.lang.Object	getReturnValue() Get return value at end of all the iterations
boolean	isDone() Called after execute() to see if iterating should stop.

方法详细资料

execute

void execute(EventHandler handler)
      throws java.lang.Exception

Execute the event handler method. If Object is not null, do not iterate further through the handler chain. If appropriate, the returned Object will be the return value.

参数:

handler - call the appropriate method on this handler

抛出:

java.lang.Exception - generic exception potentially thrown by event handlers

isDone

boolean isDone()

Called after execute() to see if iterating should stop. Should always return false before method execute() is run.

返回:

true if no more event handlers for this method should be called.

getReturnValue

java.lang.Object getReturnValue()

Get return value at end of all the iterations

返回:

null if no return value is required