001/*
002 * ModeShape (http://www.modeshape.org)
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *       http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.modeshape.connector.git;
017
018import java.io.BufferedInputStream;
019import java.io.IOException;
020import java.io.InputStream;
021import org.eclipse.jgit.lib.ObjectId;
022import org.eclipse.jgit.lib.ObjectLoader;
023import org.modeshape.jcr.mimetype.MimeTypeDetector;
024import org.modeshape.jcr.value.BinaryKey;
025import org.modeshape.jcr.value.BinaryValue;
026import org.modeshape.jcr.value.binary.AbstractBinary;
027import org.modeshape.jcr.value.binary.ExternalBinaryValue;
028
029/**
030 * A {@link BinaryValue} implementation used to read the content of a specific object ID from the supplied repository. This class
031 * computes the {@link AbstractBinary#getMimeType() MIME type} lazily or upon serialization.
032 */
033public class GitBinaryValue extends ExternalBinaryValue {
034    private static final long serialVersionUID = 1L;
035
036    private transient ObjectLoader loader;
037
038    public GitBinaryValue( ObjectId id,
039                           ObjectLoader loader,
040                           String sourceName,
041                           String nameHint,
042                           MimeTypeDetector mimeTypeDetector ) {
043        super(new BinaryKey(id.getName()), sourceName, id.getName(), loader.getSize(), nameHint, mimeTypeDetector);
044        this.loader = loader;
045    }
046
047    @Override
048    protected InputStream internalStream() throws IOException {
049        return new BufferedInputStream(loader.openStream());
050    }
051}