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java.lang.Object org.apache.hadoop.io.NullWritable
@InterfaceAudience.Public @InterfaceStability.Stable public class NullWritable
Singleton Writable with no data.
Method Summary | |
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int |
compareTo(NullWritable other)
|
boolean |
equals(Object other)
|
static NullWritable |
get()
Returns the single instance of this class. |
int |
hashCode()
|
void |
readFields(DataInput in)
Deserialize the fields of this object from in . |
String |
toString()
|
void |
write(DataOutput out)
Serialize the fields of this object to out . |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Method Detail |
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public static NullWritable get()
public String toString()
toString
in class Object
public int hashCode()
hashCode
in class Object
public int compareTo(NullWritable other)
compareTo
in interface Comparable<NullWritable>
public boolean equals(Object other)
equals
in class Object
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
in
- DataInput
to deseriablize this object from.
IOException
public void write(DataOutput out) throws IOException
Writable
out
.
write
in interface Writable
out
- DataOuput
to serialize this object into.
IOException
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