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java.lang.Object org.apache.hadoop.io.NullWritable
public class NullWritable
Singleton Writable with no data.
Nested Class Summary | |
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static class |
NullWritable.Comparator
A Comparator "optimized" for NullWritable. |
Method Summary | |
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int |
compareTo(Object 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(Object other)
compareTo
in interface Comparable
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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