/*******************************************************************************
* Copyright (C) 2006, 2012 Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
* Copyright (C) 2011, Dariusz Luksza <dariusz@luksza.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.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.egit.core.Activator;
import org.eclipse.egit.core.RepositoryUtil;
import org.eclipse.egit.core.internal.CoreText;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.treewalk.WorkingTreeOptions;
import org.eclipse.jgit.util.io.AutoCRLFInputStream;
import org.eclipse.osgi.util.NLS;
/** Accesses a blob from Git. */
class BlobStorage implements IStorage {
protected final Repository db;
protected final RepositoryUtil repositoryUtil;
private final String path;
private final ObjectId blobId;
BlobStorage(final Repository repository, final String fileName,
final ObjectId blob) {
db = repository;
path = fileName;
blobId = blob;
repositoryUtil = Activator.getDefault().getRepositoryUtil();
}
public InputStream getContents() throws CoreException {
try {
return open();
} catch (IOException e) {
throw new CoreException(Activator.error(
NLS.bind(CoreText.BlobStorage_errorReadingBlob, blobId
.name(), path), e));
}
}
private InputStream open() throws IOException, CoreException,
IncorrectObjectTypeException {
if (blobId == null)
return new ByteArrayInputStream(new byte[0]);
try {
WorkingTreeOptions workingTreeOptions = db.getConfig().get(WorkingTreeOptions.KEY);
switch (workingTreeOptions.getAutoCRLF()) {
case INPUT:
// When autocrlf == input the working tree could be either CRLF or LF, i.e. the comparison
// itself should ignore line endings.
case FALSE:
return db.open(blobId, Constants.OBJ_BLOB).openStream();
case TRUE:
default:
return new AutoCRLFInputStream(db.open(blobId, Constants.OBJ_BLOB).openStream(), true);
}
} catch (MissingObjectException notFound) {
throw new CoreException(Activator.error(NLS.bind(
CoreText.BlobStorage_blobNotFound, blobId.name(), path),
null));
}
}
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;
}
}