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/*
* Copyright (C) 2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.internal.storage.dfs;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.InflaterInputStream;
import org.eclipse.jgit.errors.LargeObjectException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.ObjectStream;
final class LargePackedWholeObject extends ObjectLoader {
private final int type;
private final long size;
private final long objectOffset;
private final int headerLength;
private final DfsPackFile pack;
private final DfsObjDatabase db;
LargePackedWholeObject(int type, long size, long objectOffset,
int headerLength, DfsPackFile pack, DfsObjDatabase db) {
this.type = type;
this.size = size;
this.objectOffset = objectOffset;
this.headerLength = headerLength;
this.pack = pack;
this.db = db;
}
@Override
public int getType() {
return type;
}
@Override
public long getSize() {
return size;
}
@Override
public boolean isLarge() {
return true;
}
@Override
public byte[] getCachedBytes() throws LargeObjectException {
throw new LargeObjectException();
}
@Override
public ObjectStream openStream() throws MissingObjectException, IOException {
DfsReader ctx = db.newReader();
InputStream in;
try {
in = new PackInputStream(pack, objectOffset + headerLength, ctx);
} catch (IOException packGone) {
// If the pack file cannot be pinned into the cursor, it
// probably was repacked recently. Go find the object
// again and open the stream from that location instead.
//
try {
ObjectId obj = pack.getReverseIdx(ctx).findObject(objectOffset);
return ctx.open(obj, type).openStream();
} finally {
ctx.close();
}
} finally {
ctx.close();
}
// Align buffer to inflater size, at a larger than default block.
// This reduces the number of context switches from the
// caller down into the pack stream inflation.
int bufsz = 8192;
in = new BufferedInputStream(
new InflaterInputStream(in, ctx.inflater(), bufsz),
bufsz);
return new ObjectStream.Filter(type, size, in);
}
}
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