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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.IOException;
import org.eclipse.jgit.internal.storage.pack.StoredObjectRepresentation;
import org.eclipse.jgit.lib.ObjectId;
class LocalObjectRepresentation extends StoredObjectRepresentation {
static LocalObjectRepresentation newWhole(Pack pack, long offset, long length) {
LocalObjectRepresentation r = new LocalObjectRepresentation() {
@Override
public int getFormat() {
return PACK_WHOLE;
}
};
r.pack = pack;
r.offset = offset;
r.length = length;
return r;
}
static LocalObjectRepresentation newDelta(Pack pack, long offset, long length,
ObjectId base) {
LocalObjectRepresentation r = new Delta();
r.pack = pack;
r.offset = offset;
r.length = length;
r.baseId = base;
return r;
}
static LocalObjectRepresentation newDelta(Pack pack, long offset, long length,
long base) {
LocalObjectRepresentation r = new Delta();
r.pack = pack;
r.offset = offset;
r.length = length;
r.baseOffset = base;
return r;
}
Pack pack;
long offset;
long length;
private long baseOffset;
private ObjectId baseId;
@Override
public int getWeight() {
return (int) Math.min(length, Integer.MAX_VALUE);
}
@Override
public ObjectId getDeltaBase() {
if (baseId == null && getFormat() == PACK_DELTA) {
try {
baseId = pack.findObjectForOffset(baseOffset);
} catch (IOException error) {
return null;
}
}
return baseId;
}
private static final class Delta extends LocalObjectRepresentation {
@Override
public int getFormat() {
return PACK_DELTA;
}
}
}
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