| // Copyright 2019 The Bazel Authors. All rights reserved. |
| // |
| // 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 com.google.devtools.build.lib.util.io; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.protobuf.Message; |
| import com.google.protobuf.util.JsonFormat; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** Creates a MessageOutputStream from an OutputStream. */ |
| public class MessageOutputStreamWrapper { |
| |
| private MessageOutputStreamWrapper() {} |
| |
| /** Writes the messages in length-delimited protobuf wire format. */ |
| public static class BinaryOutputStreamWrapper<T extends Message> |
| implements MessageOutputStream<T> { |
| private final OutputStream stream; |
| |
| public BinaryOutputStreamWrapper(OutputStream stream) { |
| this.stream = checkNotNull(stream); |
| } |
| |
| @Override |
| public void write(T m) throws IOException { |
| checkNotNull(m); |
| m.writeDelimitedTo(stream); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |
| |
| /** Writes the messages in concatenated JSON text format. */ |
| public static class JsonOutputStreamWrapper<T extends Message> implements MessageOutputStream<T> { |
| private static final JsonFormat.Printer PRINTER = |
| JsonFormat.printer().includingDefaultValueFields(); |
| |
| private final OutputStream stream; |
| |
| public JsonOutputStreamWrapper(OutputStream stream) { |
| this.stream = checkNotNull(stream); |
| } |
| |
| @Override |
| public void write(T m) throws IOException { |
| checkNotNull(m); |
| stream.write(PRINTER.print(m).getBytes(UTF_8)); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |
| } |