content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   *
   *     https://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.apache.avro.tool;
  
  import java.io.BufferedInputStream;
  import java.io.BufferedOutputStream;
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.nio.Buffer;
  import java.nio.ByteBuffer;
  import java.util.List;
  
  import joptsimple.OptionParser;
  import joptsimple.OptionSet;
  import joptsimple.OptionSpec;
  
  import org.apache.avro.Schema;
  import org.apache.avro.file.CodecFactory;
  import org.apache.avro.file.DataFileWriter;
  import org.apache.avro.generic.GenericDatumWriter;
  
  /**
   * Reads a text file into an Avro data file.
   *
   * Can accept a file name, and HDFS file URI, or stdin. Can write to a file
   * name, an HDFS URI, or stdout.
   */
  public class FromTextTool implements Tool {
    private static final String TEXT_FILE_SCHEMA = "\"bytes\"";
  
    @Override
    public String getName() {
      return "fromtext";
    }
  
    @Override
    public String getShortDescription() {
      return "Imports a text file into an avro data file.";
    }
  
    @Override
    public int run(InputStream stdin, PrintStream out, PrintStream err, List<String> args) throws Exception {
  
      OptionParser p = new OptionParser();
      OptionSpec<Integer> level = Util.compressionLevelOption(p);
      OptionSpec<String> codec = Util.compressionCodecOption(p);
  
      OptionSet opts = p.parse(args.toArray(new String[0]));
  
      List<String> nargs = (List<String>) opts.nonOptionArguments();
      if (nargs.size() != 2) {
        err.println("Expected 2 args: from_file to_file (local filenames," + " Hadoop URI's, or '-' for stdin/stdout");
        p.printHelpOn(err);
        return 1;
      }
  
      CodecFactory codecFactory = Util.codecFactory(opts, codec, level);
  
      BufferedInputStream inStream = Util.fileOrStdin(nargs.get(0), stdin);
      BufferedOutputStream outStream = Util.fileOrStdout(nargs.get(1), out);
  
      DataFileWriter<ByteBuffer> writer = new DataFileWriter<>(new GenericDatumWriter<>());
      writer.setCodec(codecFactory);
      writer.create(new Schema.Parser().parse(TEXT_FILE_SCHEMA), outStream);
  
      ByteBuffer line = ByteBuffer.allocate(128);
      boolean returnSeen = false;
      byte[] buf = new byte[8192];
      for (int end = inStream.read(buf); end != -1; end = inStream.read(buf)) {
        for (int i = 0; i < end; i++) {
          int b = buf[i] & 0xFF;
          if (b == '\n') { // newline
            if (!returnSeen) {
              System.out.println("Writing line = " + line.position());
              ((Buffer) line).flip();
              writer.append(line);
              ((Buffer) line).clear();
            } else {
              returnSeen = false;
            }
          } else if (b == '\r') { // return
            ((Buffer) line).flip();
            writer.append(line);
            ((Buffer) line).clear();
            returnSeen = true;
          } else {
            if (line.position() == line.limit()) { // reallocate longer line
              ByteBuffer tempLine = ByteBuffer.allocate(line.limit() * 2);
              ((Buffer) line).flip();
              tempLine.put(line);
              line = tempLine;
            }
            line.put((byte) b);
            returnSeen = false;
          }
        }
      }
      writer.close();
      inStream.close();
      return 0;
    }
  
  }
  