GitObjects.java

/*
 * Copyright (c) 2011, 2012 Roberto Tyley
 *
 * This file is part of 'Agit' - an Android Git client.
 *
 * Agit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Agit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/ .
 */

package com.madgag.agit.git;

import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
import static org.eclipse.jgit.lib.Constants.OBJ_COMMIT;
import static org.eclipse.jgit.lib.Constants.OBJ_TAG;
import static org.eclipse.jgit.lib.Constants.OBJ_TREE;

import org.eclipse.jgit.revwalk.RevBlob;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevTag;
import org.eclipse.jgit.revwalk.RevTree;

public class GitObjects {
    public static <T> T evaluate(RevObject revObject, GitObjectFunction<T> f) {
        switch (revObject.getType()) {
            case OBJ_COMMIT:
                return f.apply((RevCommit) revObject);
            case OBJ_TREE:
                return f.apply((RevTree) revObject);
            case OBJ_BLOB:
                return f.apply((RevBlob) revObject);
            case OBJ_TAG:
                return f.apply((RevTag) revObject);
            default:
                throw new IllegalArgumentException("Git object type '" + revObject.getType() + "' unknown");
        }
    }
}