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java.lang.Object org.apache.hadoop.io.NullWritable
public class NullWritable
Singleton Writable with no data.
Method Summary | |
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static NullWritable |
get()
Returns the single instance of this class. |
void |
readFields(DataInput in)
Reads the fields of this object from in . |
void |
write(DataOutput out)
Writes the fields of this object to out . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static NullWritable get()
public void readFields(DataInput in) throws IOException
Writable
in
. For efficiency,
implementations should attempt to re-use storage in the existing object
where possible.
readFields
in interface Writable
IOException
public void write(DataOutput out) throws IOException
Writable
out
.
write
in interface Writable
IOException
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