SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader (Hadoop 1.2.1 API)
Date: 2013-07-22

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## org.apache.hadoop.mapred
Class SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader

    java.lang.Object
      org.apache.hadoop.mapred.SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader

All Implemented Interfaces:
  RecordReader<BytesWritable,BytesWritable>

Enclosing class:
  SequenceFileAsBinaryInputFormat

    public static class SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader

extends Object
implements RecordReader<BytesWritable,BytesWritable>

Read records from a SequenceFile as binary (raw) bytes.

Constructor Summary
`SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader(Configuration conf, FileSplit split)`

Method Summary
`void` | `close()` Close this `InputSplit` to future operations.
`BytesWritable` | `createKey()` Create an object of the appropriate type to be used as a key.
`BytesWritable` | `createValue()` Create an object of the appropriate type to be used as a value.
`String` | `getKeyClassName()` Retrieve the name of the key class for this SequenceFile.
`long` | `getPos()` Returns the current position in the input.
`float` | `getProgress()` Return the progress within the input split
`String` | `getValueClassName()` Retrieve the name of the value class for this SequenceFile.
`boolean` | `next(BytesWritable key, BytesWritable val)` Read raw bytes from a SequenceFile.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader

    public SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader(Configuration conf,
                                                                            FileSplit split)
                                                                     throws IOException

Throws:
  `IOException`

Method Detail

### createKey

    public BytesWritable createKey()

  Description copied from interface: `RecordReader`
  Create an object of the appropriate type to be used as a key.

  Specified by:
    `createKey` in interface `RecordReader<BytesWritable,BytesWritable>`
  Returns:
    a new key object.

### createValue

    public BytesWritable createValue()

  Description copied from interface: `RecordReader`
  Create an object of the appropriate type to be used as a value.

  Specified by:
    `createValue` in interface `RecordReader<BytesWritable,BytesWritable>`
  Returns:
    a new value object.

### getKeyClassName

    public String getKeyClassName()

  Retrieve the name of the key class for this SequenceFile.

  See Also:
    `SequenceFile.Reader.getKeyClassName()`

### getValueClassName

    public String getValueClassName()

  Retrieve the name of the value class for this SequenceFile.

  See Also:
    `SequenceFile.Reader.getValueClassName()`

### next

    public boolean next(BytesWritable key,
                        BytesWritable val)
                 throws IOException

  Read raw bytes from a SequenceFile.

  Specified by:
    `next` in interface `RecordReader<BytesWritable,BytesWritable>`
  Parameters:
    `key` - the key to read data into
    `val` - the value to read data into
  Returns:
    true iff a key/value was read, false if at EOF
  Throws:
    `IOException`

### getPos

    public long getPos()
                throws IOException

  Description copied from interface: `RecordReader`
  Returns the current position in the input.

  Specified by:
    `getPos` in interface `RecordReader<BytesWritable,BytesWritable>`
  Returns:
    the current position in the input.
  Throws:
    `IOException`

### close

    public void close()
               throws IOException

  Description copied from interface: `RecordReader`
  Close this `InputSplit` to future operations.

  Specified by:
    `close` in interface `RecordReader<BytesWritable,BytesWritable>`
  Throws:
    `IOException`

### getProgress

    public float getProgress()
                      throws IOException

  Return the progress within the input split

  Specified by:
    `getProgress` in interface `RecordReader<BytesWritable,BytesWritable>`
  Returns:
    0.0 to 1.0 of the input byte range
  Throws:
    `IOException`

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Copyright © 2009 The Apache Software Foundation