org.apache.tapestry5.internal.services
Class MethodInvocationFailResult

java.lang.Object
  org.apache.tapestry5.internal.services.MethodInvocationFailResult

All Implemented Interfaces:

MethodInvocationResult

public class MethodInvocationFailResult
extends Object
implements MethodInvocationResult

Implementation of MethodInvocationResult for failed invocations (where a checked exception was thrown).

Since:

5.2.0

Constructor Summary

MethodInvocationFailResult(Throwable thrown)

Method Summary

Object	getReturnValue() The return value from the method invocation.
<T extends Throwable> T	getThrown(Class<T> throwableClass) If MethodInvocationResult.isFail() is true, this method provides access to the actual checked exception that was thrown.
boolean	isFail() If true, then the method invocation ended with a checked exception being thrown.
void	rethrow() If the invocation threw a checked exception, this method will wrap that exception in a RuntimeException and throw that.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodInvocationFailResult

public MethodInvocationFailResult(Throwable thrown)

Method Detail

getReturnValue

public Object getReturnValue()

Description copied from interface: MethodInvocationResult

The return value from the method invocation. This will be null if the method returns null, is a void method, or if a checked exception was thrown by the method.

Specified by:

getReturnValue in interface MethodInvocationResult

getThrown

public <T extends Throwable> T getThrown(Class<T> throwableClass)

Description copied from interface: MethodInvocationResult

If MethodInvocationResult.isFail() is true, this method provides access to the actual checked exception that was thrown.

Specified by:

getThrown in interface MethodInvocationResult

Parameters:

throwableClass - the type of exception to match

Returns:

the exception, if the method invocation threw a checked exception, and the exception is assignable to the provided type. In other cases, null is returned.

isFail

public boolean isFail()

Description copied from interface: MethodInvocationResult

If true, then the method invocation ended with a checked exception being thrown.

Specified by:

isFail in interface MethodInvocationResult

rethrow

public void rethrow()

Description copied from interface: MethodInvocationResult

If the invocation threw a checked exception, this method will wrap that exception in a RuntimeException and throw that. For most code that doesn't specifically care about the thrown exception, this method should be invoked before continuing on to examine MethodInvocationResult.getReturnValue().

Specified by:

rethrow in interface MethodInvocationResult