org.eclipse.jdt.launching/launching/org/eclipse/jdt/launching/StandardSourcePathProvider.java

package org.eclipse.jdt.launching;

/*******************************************************************************
 * Copyright (c) 2001, 2002 International Business Machines Corp. and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v0.5 
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v05.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;

/**
 * Default implementation of source lookup path computation and resolution.
 * <p>
 * This class may be subclassed.
 * </p>
 * @since 2.0
 */
public class StandardSourcePathProvider extends StandardClasspathProvider {
	
	/**
	 * @see IRuntimeClasspathProvider#computeUnresolvedClasspath(ILaunchConfiguration)
	 */
	public IRuntimeClasspathEntry[] computeUnresolvedClasspath(ILaunchConfiguration configuration) throws CoreException {
		boolean useDefault = configuration.getAttribute(IJavaLaunchConfigurationConstants.ATTR_DEFAULT_SOURCE_PATH, true);
		IRuntimeClasspathEntry[] entries = null;
		if (useDefault) {
			// the default source lookup path is the same as the classpath
			entries = super.computeUnresolvedClasspath(configuration);
		} else {
			// recover persisted source path
			entries = recoverRuntimePath(configuration, IJavaLaunchConfigurationConstants.ATTR_SOURCE_PATH);
		}
		return entries;

	}

	/**
	 * @see IRuntimeClasspathProvider#resolveClasspath(IRuntimeClasspathEntry[], ILaunchConfiguration)
	 */
	public IRuntimeClasspathEntry[] resolveClasspath(IRuntimeClasspathEntry[] entries, ILaunchConfiguration configuration) throws CoreException {
		List all = new ArrayList(entries.length);
		for (int i = 0; i < entries.length; i++) {
			if (entries[i].getType() == IRuntimeClasspathEntry.PROJECT) {
				// a project resolves to itself for source lookup (rather than the class file output locations)
				all.add(entries[i]);
			} else {
				IRuntimeClasspathEntry[] resolved =JavaRuntime.resolveRuntimeClasspathEntry(entries[i], configuration);
				for (int j = 0; j < resolved.length; j++) {
					all.add(resolved[j]);
				}				
			}
		}
		return (IRuntimeClasspathEntry[])all.toArray(new IRuntimeClasspathEntry[all.size()]);
	}

}