| // 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 com.google.common.base.Preconditions; |
| import com.google.protobuf.Message; |
| import com.google.protobuf.util.JsonFormat; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| |
| /** Creating a MessageOutputStream from an OutputStream */ |
| public class MessageOutputStreamWrapper { |
| /** Outputs the messages in binary format */ |
| public static class BinaryOutputStreamWrapper implements MessageOutputStream { |
| private final OutputStream stream; |
| |
| public BinaryOutputStreamWrapper(OutputStream stream) { |
| this.stream = Preconditions.checkNotNull(stream); |
| } |
| |
| @Override |
| public void write(Message m) throws IOException { |
| Preconditions.checkNotNull(m); |
| m.writeDelimitedTo(stream); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |
| |
| /** Outputs the messages in JSON text format */ |
| public static class JsonOutputStreamWrapper implements MessageOutputStream { |
| private final OutputStream stream; |
| private final JsonFormat.Printer printer = JsonFormat.printer().includingDefaultValueFields(); |
| |
| public JsonOutputStreamWrapper(OutputStream stream) { |
| Preconditions.checkNotNull(stream); |
| this.stream = stream; |
| } |
| |
| @Override |
| public void write(Message m) throws IOException { |
| Preconditions.checkNotNull(m); |
| stream.write(printer.print(m).getBytes(StandardCharsets.UTF_8)); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |
| |
| /** Outputs the messages in JSON text format */ |
| public static class MessageOutputStreamCollection implements MessageOutputStream { |
| private final ArrayList<MessageOutputStream> streams = new ArrayList<>(); |
| |
| public boolean isEmpty() { |
| return streams.isEmpty(); |
| } |
| |
| public void addStream(MessageOutputStream m) { |
| streams.add(m); |
| } |
| |
| @Override |
| public void write(Message m) throws IOException { |
| for (MessageOutputStream stream : streams) { |
| stream.write(m); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| IOException firstException = null; |
| for (MessageOutputStream stream : streams) { |
| try { |
| stream.close(); |
| } catch (IOException e) { |
| if (firstException == null) { |
| firstException = e; |
| } else { |
| firstException.addSuppressed(e); |
| } |
| } |
| } |
| if (firstException != null) { |
| throw firstException; |
| } |
| } |
| } |
| } |