org.eclipse.orion.server.git.objects.Index.java Source code

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Here is the source code for org.eclipse.orion.server.git.objects.Index.java

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/*******************************************************************************
 * Copyright (c) 2011, 2012 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.orion.server.git.objects;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.lib.*;
import org.eclipse.orion.server.core.resources.annotations.ResourceDescription;
import org.eclipse.orion.server.git.BaseToIndexConverter;

@ResourceDescription(type = Index.TYPE)
public class Index extends GitObject {

    public static final String RESOURCE = "index"; //$NON-NLS-1$
    public static final String TYPE = "Index"; //$NON-NLS-1$

    private String pattern;

    public Index(URI cloneLocation, Repository db, String pattern) {
        super(cloneLocation, db);
        this.pattern = pattern;
    }

    public ObjectStream toObjectStream() throws IOException {
        DirCache cache = db.readDirCache();
        DirCacheEntry entry = cache.getEntry(pattern);
        if (entry == null) {
            return null;
        }
        ObjectId blobId = entry.getObjectId();
        return db.open(blobId, Constants.OBJ_BLOB).openStream();
    }

    @Override
    protected URI getLocation() throws URISyntaxException {
        return BaseToIndexConverter.getIndexLocation(cloneLocation, BaseToIndexConverter.CLONE);
    }
}