org.apache.tapestry5.internal.plastic
Class TryCatchBlockImpl

java.lang.Object
  org.apache.tapestry5.internal.plastic.Lockable
      org.apache.tapestry5.internal.plastic.TryCatchBlockImpl

All Implemented Interfaces:

TryCatchBlock

public class TryCatchBlockImpl
extends Lockable
implements TryCatchBlock

Method Summary

void	addCatch(String exceptionClassName, InstructionBuilderCallback callback) Ends the block (if not already ended) and inserts a catch block for the named exception.
void	addFinally(InstructionBuilderCallback callback) As with TryCatchBlock.addCatch(String, InstructionBuilderCallback), but the exception caught is null, which acts as a finally block in the Java language.
void	addTry(InstructionBuilderCallback callback) Invoked first, to generate the code in which exceptions may be caught.

Methods inherited from class org.apache.tapestry5.internal.plastic.Lockable

check, lock

Methods inherited from class java.lang.Object

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

Method Detail

addTry

public void addTry(InstructionBuilderCallback callback)

Description copied from interface: TryCatchBlock

Invoked first, to generate the code in which exceptions may be caught.

Specified by:

addTry in interface TryCatchBlock

addCatch

public void addCatch(String exceptionClassName,
                     InstructionBuilderCallback callback)

Description copied from interface: TryCatchBlock

Ends the block (if not already ended) and inserts a catch block for the named exception. The InstructionBuilder is returned so that the code for handling the exception can be added. The exception object will be on top of the stack. This should be called after TryCatchBlock.addTry(InstructionBuilderCallback).

Note: no attempt is made currently to sort the handlers; for example adding a catch for java.lang.Exception first will mean that more specific exception handlers added later will never be invoked.

Specified by:

addCatch in interface TryCatchBlock

Parameters:

exceptionClassName - caught exception class

callback - that implements the logic of the catch block

addFinally

public void addFinally(InstructionBuilderCallback callback)

Description copied from interface: TryCatchBlock

As with TryCatchBlock.addCatch(String, InstructionBuilderCallback), but the exception caught is null, which acts as a finally block in the Java language. This must be called last (after TryCatchBlock.addTry(InstructionBuilderCallback) and any calls to TryCatchBlock.addCatch(String, InstructionBuilderCallback).

Specified by:

addFinally in interface TryCatchBlock

Parameters:

callback - implements the logic of the finally block