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