Package org.apache.hadoop.mapred.LineRecordReader

Examples of org.apache.hadoop.mapred.LineRecordReader.LineReader.readLine()


      for (Path indexFinalPath : paths) {
        FSDataInputStream ifile = fs.open(indexFinalPath);
        LineReader lr = new LineReader(ifile, conf);
        Text line = new Text();
        while (lr.readLine(line) > 0) {
          add(line);
        }
        // this will close the input stream
        lr.close();
      }
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    public void run() {
      try {
        in_ = connectInputStream();
        LineReader lineReader = new LineReader((InputStream)in_, conf_);
        Text line = new Text();
        while (lineReader.readLine(line) > 0) {
          buf_.append(line.toString());
          buf_.append('\n');
          line.clear();
        }
        lineReader.close();
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  }
 
  public void testUTF8() throws Exception {
    LineReader in = makeStream("abcd\u20acbdcd\u20ac");
    Text line = new Text();
    in.readLine(line);
    assertEquals("readLine changed utf8 characters",
                 "abcd\u20acbdcd\u20ac", line.toString());
    in = makeStream("abc\u200axyz");
    in.readLine(line);
    assertEquals("split on fake newline", "abc\u200axyz", line.toString());
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    Text line = new Text();
    in.readLine(line);
    assertEquals("readLine changed utf8 characters",
                 "abcd\u20acbdcd\u20ac", line.toString());
    in = makeStream("abc\u200axyz");
    in.readLine(line);
    assertEquals("split on fake newline", "abc\u200axyz", line.toString());
  }

  public void testNewLines() throws Exception {
    LineReader in = makeStream("a\nbb\n\nccc\rdddd\r\neeeee");
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  }

  public void testNewLines() throws Exception {
    LineReader in = makeStream("a\nbb\n\nccc\rdddd\r\neeeee");
    Text out = new Text();
    in.readLine(out);
    assertEquals("line1 length", 1, out.getLength());
    in.readLine(out);
    assertEquals("line2 length", 2, out.getLength());
    in.readLine(out);
    assertEquals("line3 length", 0, out.getLength());
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  public void testNewLines() throws Exception {
    LineReader in = makeStream("a\nbb\n\nccc\rdddd\r\neeeee");
    Text out = new Text();
    in.readLine(out);
    assertEquals("line1 length", 1, out.getLength());
    in.readLine(out);
    assertEquals("line2 length", 2, out.getLength());
    in.readLine(out);
    assertEquals("line3 length", 0, out.getLength());
    in.readLine(out);
    assertEquals("line4 length", 3, out.getLength());
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    Text out = new Text();
    in.readLine(out);
    assertEquals("line1 length", 1, out.getLength());
    in.readLine(out);
    assertEquals("line2 length", 2, out.getLength());
    in.readLine(out);
    assertEquals("line3 length", 0, out.getLength());
    in.readLine(out);
    assertEquals("line4 length", 3, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 4, out.getLength());
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    assertEquals("line1 length", 1, out.getLength());
    in.readLine(out);
    assertEquals("line2 length", 2, out.getLength());
    in.readLine(out);
    assertEquals("line3 length", 0, out.getLength());
    in.readLine(out);
    assertEquals("line4 length", 3, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 4, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 5, out.getLength());
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    assertEquals("line2 length", 2, out.getLength());
    in.readLine(out);
    assertEquals("line3 length", 0, out.getLength());
    in.readLine(out);
    assertEquals("line4 length", 3, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 4, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 5, out.getLength());
    assertEquals("end of file", 0, in.readLine(out));
  }
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    assertEquals("line3 length", 0, out.getLength());
    in.readLine(out);
    assertEquals("line4 length", 3, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 4, out.getLength());
    in.readLine(out);
    assertEquals("line5 length", 5, out.getLength());
    assertEquals("end of file", 0, in.readLine(out));
  }
 
  private static void writeFile(FileSystem fs, Path name,
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