org.apache.hadoop.mapred.lib.db
Class DBInputFormat.NullDBWritable

java.lang.Object
  org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable

All Implemented Interfaces:

Writable, DBWritable

Enclosing class:

DBInputFormat<T extends DBWritable>

public static class DBInputFormat.NullDBWritable
extends java.lang.Object
implements DBWritable, Writable

A Class that does nothing, implementing DBWritable

Constructor Summary

DBInputFormat.NullDBWritable()

Method Summary

void	readFields(java.io.DataInput in) Deserialize the fields of this object from in.
void	readFields(java.sql.ResultSet arg0) Reads the fields of the object from the ResultSet.
void	write(java.io.DataOutput out) Serialize the fields of this object to out.
void	write(java.sql.PreparedStatement arg0) Sets the fields of the object in the PreparedStatement.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DBInputFormat.NullDBWritable

public DBInputFormat.NullDBWritable()

Method Detail

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

java.io.IOException

readFields

public void readFields(java.sql.ResultSet arg0)
                throws java.sql.SQLException

Description copied from interface: DBWritable

Reads the fields of the object from the ResultSet.

Specified by:

readFields in interface DBWritable

Parameters:

arg0 - the ResultSet to get the fields from.

Throws:

java.sql.SQLException

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

java.io.IOException

write

public void write(java.sql.PreparedStatement arg0)
           throws java.sql.SQLException

Description copied from interface: DBWritable

Sets the fields of the object in the PreparedStatement.

Specified by:

write in interface DBWritable

Parameters:

arg0 - the statement that the fields are put into.

Throws:

java.sql.SQLException