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/*
* Copyright (C) 2010, Google Inc. and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.internal.storage.file;
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;
class LargePackedWholeObject extends ObjectLoader {
private final int type;
private final long size;
private final long objectOffset;
private final int headerLength;
private final Pack pack;
private final FileObjectDatabase db;
LargePackedWholeObject(int type, long size, long objectOffset,
int headerLength, Pack pack, FileObjectDatabase 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 {
try {
throw new LargeObjectException(getObjectId());
} catch (IOException cannotObtainId) {
throw new LargeObjectException(cannotObtainId);
}
}
@Override
public ObjectStream openStream() throws MissingObjectException, IOException {
WindowCursor wc = new WindowCursor(db);
InputStream in;
try {
in = new PackInputStream(pack, objectOffset + headerLength, wc);
} 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.
//
return wc.open(getObjectId(), type).openStream();
}
in = new BufferedInputStream( //
new InflaterInputStream( //
in, //
wc.inflater(), //
8192), //
8192);
return new ObjectStream.Filter(type, size, in);
}
private ObjectId getObjectId() throws IOException {
return pack.findObjectForOffset(objectOffset);
}
}
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