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/*******************************************************************************
* Copyright (c) 2020 Torbjörn Svensson and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Torbjörn Svensson - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.ui.launchConfigurations;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IPath;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
/**
* Filters out the instance of ILaunchCOnfiguration where the, possibly nested,
* launch configuration files are stored. If the launch configuration is local,
* it's simply returned.
*/
public class UniqueLaunchConfigurationFileFilter extends ViewerFilter {
@Override
public Object[] filter(Viewer viewer, Object parent, Object[] elements) {
int size = elements.length;
if (size == 0) {
return elements;
}
List<Object> filteredElements = new ArrayList<>(size);
Map<String, List<ILaunchConfiguration>> configPathMap = new HashMap<>();
for (Object element : elements) {
if (element instanceof ILaunchConfiguration) {
ILaunchConfiguration config = (ILaunchConfiguration) element;
String path = toLaunchFileLocation(config);
if (!configPathMap.containsKey(path)) {
configPathMap.put(path, new ArrayList<>());
}
configPathMap.get(path).add(config);
} else {
filteredElements.add(element);
}
}
for (Entry<String, List<ILaunchConfiguration>> entry : configPathMap.entrySet()) {
List<ILaunchConfiguration> configsWithSamePath = entry.getValue();
if (entry.getKey() == null) {
// Local configurations ends up here, add them without further filter
filteredElements.addAll(configsWithSamePath);
} else if (configsWithSamePath.size() == 1) {
// Only one configuration, add it
filteredElements.add(configsWithSamePath.get(0));
} else if (configsWithSamePath.size() > 1) {
// More than one config with same path.
// Order them with the shortest project relative path first
configsWithSamePath.sort((o1, o2) -> {
IPath path1 = o1.getFile().getProjectRelativePath();
IPath path2 = o2.getFile().getProjectRelativePath();
return Integer.compare(path1.segmentCount(), path2.segmentCount());
});
// Use the configuration with the shortest path.
// The other configurations in the list are "identical" but with
// the container set to one of the parent project(s) in the
// workspace hierarchy.
filteredElements.add(configsWithSamePath.get(0));
}
}
return filteredElements.toArray();
}
private String toLaunchFileLocation(ILaunchConfiguration config) {
if (!config.isLocal()) {
IFile file = config.getFile();
if (file != null) {
IPath path = file.getLocation();
if (path != null) {
return path.toOSString();
}
}
}
return null;
}
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
return true;
}
}
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