Examples of org.apache.hadoop.hdfs.util.ExactSizeInputStream

org.apache.hadoop.hdfs.util.ExactSizeInputStream
An InputStream implementations which reads from some other InputStream but expects an exact number of bytes. Any attempts to read past the specified number of bytes will return as if the end of the stream was reached. If the end of the underlying stream is reached prior to the specified number of bytes, an EOFException is thrown.

      throw new EOFException("Premature EOF: no length prefix available");
    }


    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
    return new ExactSizeInputStream(input, size);
  }

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    }
    
    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
  
    return new ExactSizeInputStream(input, size);
  }

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      throw new EOFException("Premature EOF: no length prefix available");
    }


    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
    return new ExactSizeInputStream(input, size);
  }

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      throw new EOFException("Premature EOF: no length prefix available");
    }


    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
    return new ExactSizeInputStream(input, size);
  }

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      throw new EOFException("Premature EOF: no length prefix available");
    }


    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
    return new ExactSizeInputStream(input, size);
  }

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    }
    
    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
  
    return new ExactSizeInputStream(input, size);
  }

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      throw new EOFException("Premature EOF: no length prefix available");
    }


    int size = CodedInputStream.readRawVarint32(firstByte, input);
    assert size >= 0;
    return new ExactSizeInputStream(input, size);
  }

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import org.junit.Test;


public class TestExactSizeInputStream {
  @Test
  public void testBasicsReadSingle() throws IOException {
    ExactSizeInputStream s = new ExactSizeInputStream(byteStream("hello"), 3);
    assertEquals(3, s.available());
    
    assertEquals((int)'h', s.read());
    assertEquals((int)'e', s.read());
    assertEquals((int)'l', s.read());
    assertEquals(-1, s.read());
    assertEquals(0, s.available());
  }

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    assertEquals(0, s.available());
  }
  
  @Test
  public void testBasicsReadArray() throws IOException {
    ExactSizeInputStream s = new ExactSizeInputStream(byteStream("hello"), 3);
    assertEquals(3, s.available());
    
    byte[] buf = new byte[10];
    
    assertEquals(2, s.read(buf, 0, 2));
    assertEquals('h', buf[0]);
    assertEquals('e', buf[1]);
    
    assertEquals(1, s.read(buf, 0, 2));
    assertEquals('l', buf[0]);
    
    assertEquals(-1, s.read(buf, 0, 2));
  }

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    assertEquals(-1, s.read(buf, 0, 2));
  }
  
  @Test
  public void testBasicsSkip() throws IOException {
    ExactSizeInputStream s = new ExactSizeInputStream(byteStream("hello"), 3);
    assertEquals(3, s.available());
    
    assertEquals(2, s.skip(2));
    assertEquals(1, s.skip(2));
    assertEquals(0, s.skip(2));
  }

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org.apache.hadoop.hdfs.protocol.HdfsProtoUtil

org.apache.hadoop.hdfs.protocolPB.PBHelper

org.apache.hadoop.hdfs.util.TestExactSizeInputStream

java.io.EOFException

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