donaldp 02/04/25 01:15:26
Added: api/src/java/org/apache/myrmidon/listeners
TaskToProjectListenerAdapter.java
Log:
Add an adaptor between TaskListener and ProjectListener.
Revision Changes Path
1.1
jakarta-ant-myrmidon/api/src/java/org/apache/myrmidon/listeners/TaskToProjectListenerAdapter.java
Index: TaskToProjectListenerAdapter.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.myrmidon.listeners;
import java.util.StringTokenizer;
import org.apache.myrmidon.api.event.TaskEvent;
import org.apache.myrmidon.api.event.TaskListener;
/**
* This is a class that adapts [EMAIL PROTECTED] TaskListener} interface to
* the [EMAIL PROTECTED] ProjectListener} interface.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/04/25 08:15:26 $
*/
public class TaskToProjectListenerAdapter
implements TaskListener
{
private final ProjectListener m_listener;
/**
* Create an adaptor for specified listener.
*
* @param listener the ProjectListener to redirect events to
*/
public TaskToProjectListenerAdapter( final ProjectListener listener )
{
m_listener = listener;
}
/**
* Notify the listener that the task is starting.
* This is called prior to task starting.
*
* @param event the TaskEvent
*/
public void taskStarting( final TaskEvent event )
{
final ProjectEvent projectEvent = toProjectEvent( event );
if( null == projectEvent.getTarget() )
{
m_listener.projectStarted( projectEvent );
}
else if( null == projectEvent.getTask() )
{
m_listener.targetStarted( projectEvent );
}
else
{
m_listener.taskStarted( projectEvent );
}
}
/**
* Notify the listener that the task logged
* a message.
*
* @param event the TaskEvent
*/
public void taskMessage( TaskEvent event )
{
final ProjectEvent projectEvent = toProjectEvent( event );
m_listener.log( projectEvent );
}
/**
* Notify the listener that the task has finished.
* This is called after task has finished.
*
* @param event the TaskEvent
*/
public void taskFinished( TaskEvent event )
{
final ProjectEvent projectEvent = toProjectEvent( event );
if( null == projectEvent.getTarget() )
{
m_listener.projectFinished( projectEvent );
}
else if( null == projectEvent.getTask() )
{
m_listener.targetFinished( projectEvent );
}
else
{
m_listener.taskFinished( projectEvent );
}
}
/**
* Convert the specified [EMAIL PROTECTED] TaskEvent} to a [EMAIL
PROTECTED] ProjectEvent}.
*
* @param event the TaskEvent
* @return the Project event representing TaskEvent
*/
private ProjectEvent toProjectEvent( final TaskEvent event )
{
final String path = event.getPath();
final String[] elements = split( path, "/" );
String projectName = null;
String targetName = null;
String taskName = null;
if( 1 >= elements.length )
{
projectName = elements[ 0 ];
}
if( 2 >= elements.length )
{
targetName = elements[ 1 ];
}
if( 3 >= elements.length )
{
taskName = elements[ elements.length - 1 ];
}
return new ProjectEvent( event,
projectName,
targetName,
taskName,
event.getMessage(),
event.getThrowable() );
}
/**
* Splits the string on every token into an array of strings.
*
* @param string the string
* @param onToken the token
* @return the resultant array
*/
protected final String[] split( final String string, final String onToken
)
{
final StringTokenizer tokenizer = new StringTokenizer( string,
onToken );
final String[] result = new String[ tokenizer.countTokens() ];
for( int i = 0; i < result.length; i++ )
{
result[ i ] = tokenizer.nextToken();
}
return result;
}
}
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