org.xchain

Interface Filter

All Superinterfaces:

Command

All Known Implementing Classes:

ExecuteCommand, FilterChainCommand, FilterChainImpl, FilterChooseCommand, FilterChooseCommand.OtherwiseClause, FilterChooseCommand.WhenClause, FilterIfCommand, FilterList, FilterVariableCommand

public interface Filter
extends Command

The interface for JXPathContext filters. Filters extend command and provide a hook, postProcess(JXPathContext, Exception), to clean up the command after it finishes executing. This method will be called once for every call to execute on the command. If the parent command encounters an exception the postProcess will be invoked on any Filters that have run. Each filter will have a chance to handle the exception in the post process. If any filter inside the parent command handles the exception then execution will continue to the next sibling of the parent command. If no filter handles the exception then the exception will be thrown to the parent command's parent.

Author:

Devon Tackett, Christian Trimble

Method Summary

Methods

Modifier and Type	Method and Description
boolean	postProcess(org.apache.commons.jxpath.JXPathContext context, java.lang.Exception exception) Invoked after the parent command has completed execution or an exception is encountered.

Methods inherited from interface org.xchain.Command

execute

Method Detail

postProcess

boolean postProcess(org.apache.commons.jxpath.JXPathContext context,
                  java.lang.Exception exception)

Invoked after the parent command has completed execution or an exception is encountered.

Parameters:

context - The current context for the command chain.

exception - The exception the parent command encountered. Null if no exception was encountered.

Returns:

Whether the given exception was handled. If no exception was encountered, the result is ignored.