content: /*
   * Copyright (C) 2017 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 com.google.android.apps.common.testing.broker;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  import static com.google.common.io.Closeables.close;
  
  import com.google.common.base.Charsets;
  import com.google.common.io.LineProcessor;
  import java.io.IOException;
  import java.io.OutputStream;
  
  /**
   * Copies all lines to an output stream.
   *
   */
  class StreamWritingProcessor implements LineProcessor<Void> {
  
    private final OutputStream outStream;
  
    public StreamWritingProcessor(OutputStream outStream) {
      this.outStream = checkNotNull(outStream);
    }
  
    @Override
    public final boolean processLine(String line) {
      try {
        outStream.write(line.getBytes(Charsets.UTF_8));
        outStream.write('\n');
      } catch (IOException ioe) {
        throw new RuntimeException(ioe);
      }
  
      return true;
    }
  
    @Override
    /**
     * Closes the output stream.
     */
    public Void getResult() {
      try {
        close(outStream, true);
      } catch (IOException e) {
        // Exception logged as Level.WARNING by close()
      }
      return null;
    }
  
  }
  