donaldp 02/02/08 20:49:47
Modified: proposal/myrmidon/src/java/org/apache/antlib/core
Resources.properties
Added: proposal/myrmidon/src/java/org/apache/antlib/core
TryCatchTask.java TaskList.java
Log:
Add a try-catch taks to emulate javas try-catch constructs
Revision Changes Path
1.7 +9 -1
jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/Resources.properties
Index: Resources.properties
===================================================================
RCS file:
/home/cvs/jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/Resources.properties,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -r1.6 -r1.7
--- Resources.properties 25 Jan 2002 11:26:45 -0000 1.6
+++ Resources.properties 9 Feb 2002 04:49:46 -0000 1.7
@@ -25,4 +25,12 @@
invalid.enum.error=Invalid value "{0}" for enum, expected one of {1}.
if.ifelse-duplicate.error=Can only set one of if/else for If task type.
-if.no-condition.error=No condition was specified for If task.
\ No newline at end of file
+if.no-condition.error=No condition was specified for If task.
+
+trycatch.multiple-trys.error=Multiple <try/> elements can not be placed
inside <try-catch/> task.
+trycatch.missing-try-before-catch.error=There needs to be a <try/> element
before <catch/> element.
+trycatch.multiple-catches.error=Multiple <catch/> elements can not be placed
inside <try-catch/> task.
+trycatch.missing-try-before-finally.error=There needs to be a <try/> element
before <finally/> element.
+trycatch.multiple-finallys.error=Multiple <finally/> elements can not be
placed inside <try-catch/> task.
+trycatch.no-try.error=Missing <try/> element from <try-catch/> task.
+trycatch.missing-second.error=Missing <catch/> or <finally/> elements from
<try-catch/> task.
\ No newline at end of file
1.1
jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/TryCatchTask.java
Index: TryCatchTask.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 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.interfaces.executor.ExecutionFrame;
import org.apache.myrmidon.interfaces.executor.Executor;
/**
* A task that emulates the try-catch-finally construct in a number
* of languages.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/02/09 04:49:46 $
* @ant:task name="try-catch"
*/
public final class TryCatchTask
extends AbstractContainerTask
{
private final static Resources REZ =
ResourceManager.getPackageResources( TryCatchTask.class );
private TaskList m_try;
private TaskList m_catch;
private TaskList m_finally;
public void addTry( final TaskList taskList )
throws TaskException
{
if( null != m_try )
{
final String message = REZ.getString(
"trycatch.multiple-trys.error" );
throw new TaskException( message );
}
m_try = taskList;
}
public void addCatch( final TaskList taskList )
throws TaskException
{
if( null == m_try )
{
final String message = REZ.getString(
"trycatch.missing-try-before-catch.error" );
throw new TaskException( message );
}
else if( null != m_catch )
{
final String message = REZ.getString(
"trycatch.multiple-catches.error" );
throw new TaskException( message );
}
m_catch = taskList;
}
public void addFinally( final TaskList taskList )
throws TaskException
{
if( null == m_try )
{
final String message = REZ.getString(
"trycatch.missing-try-before-finally.error" );
throw new TaskException( message );
}
else if( null != m_finally )
{
final String message = REZ.getString(
"trycatch.multiple-finallys.error" );
throw new TaskException( message );
}
m_finally = taskList;
}
public void execute()
throws TaskException
{
validate();
final ExecutionFrame frame = (ExecutionFrame)getService(
ExecutionFrame.class );
final Executor executor = (Executor)getService( Executor.class );
try
{
final Configuration[] tasks = m_try.getTasks();
executeTasks( executor, frame, tasks );
}
catch( final TaskException te )
{
if( null != m_catch )
{
final Configuration[] tasks = m_catch.getTasks();
executeTasks( executor, frame, tasks );
}
else
{
throw te;
}
}
finally
{
if( null != m_finally )
{
final Configuration[] tasks = m_finally.getTasks();
executeTasks( executor, frame, tasks );
}
}
}
private void validate()
throws TaskException
{
if( null == m_try )
{
final String message = REZ.getString( "trycatch.no-try.error" );
throw new TaskException( message );
}
else if( null == m_catch && null == m_finally )
{
final String message = REZ.getString(
"trycatch.missing-second.error" );
throw new TaskException( message );
}
}
/**
* Utility method to execute the tasks in an appropriate environment.
*/
private void executeTasks( final Executor executor,
final ExecutionFrame frame,
final Configuration[] tasks )
throws TaskException
{
for( int i = 0; i < tasks.length; i++ )
{
final Configuration task = tasks[ i ];
executor.execute( task, frame );
}
}
public String toString()
{
return "Try-Catch-Finally";
}
}
1.1
jakarta-ant/proposal/myrmidon/src/java/org/apache/antlib/core/TaskList.java
Index: TaskList.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.framework.configuration.Configuration;
/**
* This object contains an ordered list of tasks.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/02/09 04:49:46 $
*/
public class TaskList
{
private ArrayList m_tasks = new ArrayList();
public void add( final Configuration task )
{
m_tasks.add( task );
}
public Configuration[] getTasks()
{
return (Configuration[])m_tasks.toArray( new Configuration[
m_tasks.size() ] );
}
}
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