blob: c98da6485fa78e1de4758ce9cf746b6a8f2f6c63 [file] [log] [blame]
// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.eclipse.jgit.lib;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.eclipse.jgit.util.IO;
public class ObjectIdSerialization {
public static void writeCanBeNull(OutputStream out, AnyObjectId id) throws IOException {
if (id != null) {
out.write((byte) 1);
writeNotNull(out, id);
} else {
out.write((byte) 0);
}
}
public static void writeNotNull(OutputStream out, AnyObjectId id) throws IOException {
id.copyRawTo(out);
}
public static ObjectId readCanBeNull(InputStream in) throws IOException {
switch (in.read()) {
case 0:
return null;
case 1:
return readNotNull(in);
default:
throw new IOException("Invalid flag before ObjectId");
}
}
public static ObjectId readNotNull(InputStream in) throws IOException {
final byte[] b = new byte[20];
IO.readFully(in, b, 0, 20);
return ObjectId.fromRaw(b);
}
private ObjectIdSerialization() {}
}