org.eclipse.egit.ui.internal.repository.tree.command.SubmoduleCommand.java Source code

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/******************************************************************************
 *  Copyright (c) 2012 GitHub Inc.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  Contributors:
 *    Kevin Sawicki (GitHub Inc.) - initial API and implementation
 *****************************************************************************/
package org.eclipse.egit.ui.internal.repository.tree.command;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.egit.ui.internal.repository.tree.RepositoryTreeNode;
import org.eclipse.egit.ui.internal.repository.tree.RepositoryTreeNodeType;
import org.eclipse.jgit.lib.Repository;

/**
 * Base submodule command with helpers for finding the selected submodule paths
 * and parent repositories
 *
 * @param <V>
 */
public abstract class SubmoduleCommand<V> extends RepositoriesViewCommandHandler<V> {

    /**
     * Get submodule from selected nodes
     * <p>
     * Keys with null values denote repositories where all submodules should be
     * used for the current command being executed
     *
     * @param nodes
     * @return non-null but possibly empty map of parent repository's to
     *         submodule paths
     */
    protected Map<Repository, List<String>> getSubmodules(final List<RepositoryTreeNode<?>> nodes) {
        final Map<Repository, List<String>> repoPaths = new HashMap<Repository, List<String>>();
        for (RepositoryTreeNode<?> node : nodes) {
            if (node.getType() == RepositoryTreeNodeType.REPO) {
                Repository parent = node.getParent().getRepository();
                String path = Repository.stripWorkDir(parent.getWorkTree(), node.getRepository().getWorkTree());
                List<String> paths = repoPaths.get(parent);
                if (paths == null) {
                    paths = new ArrayList<String>();
                    repoPaths.put(parent, paths);
                }
                paths.add(path);
            }
        }
        for (RepositoryTreeNode<?> node : nodes)
            if (node.getType() == RepositoryTreeNodeType.SUBMODULES)
                // Clear paths so all submodules are updated
                repoPaths.put(node.getParent().getRepository(), null);
        return repoPaths;
    }

}