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## org.apache.hadoop.io
Class SetFile.Writer

    java.lang.Object
      org.apache.hadoop.io.MapFile.Writer
          org.apache.hadoop.io.SetFile.Writer

All Implemented Interfaces:
  Closeable

Enclosing class:
  SetFile

    public static class SetFile.Writer

extends MapFile.Writer

Write a new set file.

Constructor Summary
`SetFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, SequenceFile.CompressionType compress)` Create a set naming the element class and compression type.
`SetFile.Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, SequenceFile.CompressionType compress)` Create a set naming the element comparator and compression type.
`SetFile.Writer(FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass)` Deprecated. pass a Configuration too

Method Summary
`void` | `append(WritableComparable key)` Append a key to a set.

Methods inherited from class org.apache.hadoop.io.MapFile.Writer
`append, close, getIndexInterval, setIndexInterval, setIndexInterval`

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

Constructor Detail

### SetFile.Writer

    public SetFile.Writer(FileSystem fs,
                          String dirName,
                          Class<? extends WritableComparable> keyClass)
                   throws IOException

  Deprecated. pass a Configuration too

  Create the named set for keys of the named class.

  Throws:
    `IOException`

### SetFile.Writer

    public SetFile.Writer(Configuration conf,
                          FileSystem fs,
                          String dirName,
                          Class<? extends WritableComparable> keyClass,
                          SequenceFile.CompressionType compress)
                   throws IOException

  Create a set naming the element class and compression type.

  Throws:
    `IOException`

### SetFile.Writer

    public SetFile.Writer(Configuration conf,
                          FileSystem fs,
                          String dirName,
                          WritableComparator comparator,
                          SequenceFile.CompressionType compress)
                   throws IOException

  Create a set naming the element comparator and compression type.

  Throws:
    `IOException`

Method Detail

### append

    public void append(WritableComparable key)
                throws IOException

  Append a key to a set. The key must be strictly greater than the previous key added to the set.

  Throws:
    `IOException`

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Copyright © 2009 The Apache Software Foundation