donaldp 02/02/06 05:19:31
Added: proposal/myrmidon/src/java/org/apache/antlib/core
IfTask.java
Log:
Add a simple if task that will eventually help with ant1.x compat
Revision Changes Path
1.1
jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/IfTask.java
Index: IfTask.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.antlib.core;
import java.util.ArrayList;
import org.apache.avalon.excalibur.i18n.ResourceManager;
import org.apache.avalon.excalibur.i18n.Resources;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.myrmidon.api.TaskException;
import org.apache.myrmidon.framework.AbstractContainerTask;
import org.apache.myrmidon.framework.Condition;
import org.apache.myrmidon.interfaces.executor.ExecutionFrame;
import org.apache.myrmidon.interfaces.executor.Executor;
/**
* A simple task to test a supplied condition. If the condition is true
* then it will execute the inner tasks, else it won't.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/02/06 13:19:31 $
* @ant:task name="if"
*/
public class IfTask
extends AbstractContainerTask
{
private static final Resources REZ =
ResourceManager.getPackageResources( IfTask.class );
private Condition m_condition;
private ArrayList m_tasks = new ArrayList();
/**
* Set if clause on pattern.
*
* @param condition the condition
* @exception TaskException if an error occurs
*/
public void setTest( final String condition )
throws TaskException
{
verifyConditionNull();
m_condition = new Condition( true, condition );
}
/**
* Set unless clause of pattern.
*
* @param condition the unless clause
* @exception TaskException if an error occurs
*/
public void setNotTest( final String condition )
throws TaskException
{
verifyConditionNull();
m_condition = new Condition( false, condition );
}
public void add( final Configuration task )
{
m_tasks.add( task );
}
public void execute()
throws TaskException
{
if( null == m_condition )
{
final String message = REZ.getString( "if.no-condition.error" );
throw new TaskException( message );
}
final Configuration[] tasks =
(Configuration[])m_tasks.toArray( new Configuration[
m_tasks.size() ] );
final ExecutionFrame frame = (ExecutionFrame)getService(
ExecutionFrame.class );
final Executor executor = (Executor)getService( Executor.class );
for( int i = 0; i < tasks.length; i++ )
{
final Configuration task = tasks[ i ];
executor.execute( task, frame );
}
}
public String toString()
{
return "If['" + m_condition + "]";
}
/**
* Utility method to make sure condition unset.
* Made so that it is not possible for both if and unless to be set.
*
* @exception TaskException if an error occurs
*/
private void verifyConditionNull()
throws TaskException
{
if( null != m_condition )
{
final String message = REZ.getString( "if.ifelse-duplicate.error"
);
throw new TaskException( message );
}
}
}
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