org.apache.xmlgraphics.ps.dsc
Class FilteringEventListener

java.lang.Object
  org.apache.xmlgraphics.ps.dsc.FilteringEventListener

All Implemented Interfaces:

DSCListener

public class FilteringEventListener
extends java.lang.Object
implements DSCListener

DSCListener implementation that filters certain DSC events.

Constructor Summary

FilteringEventListener(DSCFilter filter)
Main constructor.

Method Summary

void	processEvent(DSCEvent event, DSCParser parser) Called for each DSC event.

Methods inherited from class java.lang.Object

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

Constructor Detail

FilteringEventListener

public FilteringEventListener(DSCFilter filter)

Main constructor.

Parameters:

filter - the filter

Method Detail

processEvent

public void processEvent(DSCEvent event,
                         DSCParser parser)
                  throws java.io.IOException,
                         DSCException

Called for each DSC event. You can call methods on the DSC parser to skip comments, for example. But implementations need to be good citizens and take into account that multiple listeners can be active at the same time and that they might interfere with other listeners. When returning from the call, state information such as filters should be restored.

Specified by:

processEvent in interface DSCListener

Parameters:

event - the DSC event

parser - the DSC parser

Throws:

java.io.IOException - if an I/O error occurs

DSCException - if a DSC-specific error occurs