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/*******************************************************************************
* Copyright (C) 2006, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
*
* 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
*******************************************************************************/
package org.eclipse.egit.core.internal.storage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.eclipse.core.internal.resources.ResourceException;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.Repository;
/** Accesses a blob from Git. */
class BlobStorage implements IStorage {
private final Repository db;
private final String path;
private final ObjectId blobId;
BlobStorage(final Repository repository, final String fileName,
final ObjectId blob) {
db = repository;
path = fileName;
blobId = blob;
}
public InputStream getContents() throws CoreException {
try {
return open();
} catch (IOException e) {
throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL,
getFullPath(), "IO error reading Git blob " + blobId + ".",
e);
}
}
private InputStream open() throws IOException, ResourceException,
IncorrectObjectTypeException {
final ObjectLoader reader = db.openBlob(blobId);
if (reader == null)
throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL,
getFullPath(), "Git blob " + blobId + " not found.", null);
final byte[] data = reader.getBytes();
if (reader.getType() != Constants.OBJ_BLOB)
throw new IncorrectObjectTypeException(blobId, Constants.TYPE_BLOB);
return new ByteArrayInputStream(data);
}
public IPath getFullPath() {
return Path.fromPortableString(path);
}
public String getName() {
final int last = path.lastIndexOf('/');
return last >= 0 ? path.substring(last + 1) : path;
}
public boolean isReadOnly() {
return true;
}
public Object getAdapter(final Class adapter) {
return null;
}
}
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