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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.core.sourcelookup;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.sourcelookup.*;
/**
* Proxy to contributed source path computer extension.
*/
public class SourcePathComputer implements ISourcePathComputer {
// lazily instantiated delegate
private ISourcePathComputerDelegate fDelegate = null;
// extension definition
private IConfigurationElement fElement = null;
/**
* Constructs a source path computer on the given extension.
*
* @param element extension definition
*/
public SourcePathComputer(IConfigurationElement element) {
fElement = element;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.sourcelookup.ISourceContainerType#getId()
*/
public String getId() {
return fElement.getAttribute("id"); //$NON-NLS-1$
}
/**
* Lazily instantiates and returns the underlying source container type.
*
* @exception CoreException if unable to instantiate
*/
private ISourcePathComputerDelegate getDelegate() throws CoreException {
if (fDelegate == null) {
fDelegate = (ISourcePathComputerDelegate) fElement.createExecutableExtension("class"); //$NON-NLS-1$
}
return fDelegate;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.sourcelookup.ISourcePathComputer#computeSourceContainers(org.eclipse.debug.core.ILaunchConfiguration, org.eclipse.core.runtime.IProgressMonitor)
*/
public ISourceContainer[] computeSourceContainers(ILaunchConfiguration configuration, IProgressMonitor monitor) {
try {
return getDelegate().computeSourceContainers(configuration, monitor);
} catch (CoreException e) {
DebugPlugin.log(e);
}
return new ISourceContainer[0];
}
}
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