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

java.lang.Object
  extended by 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 Object
implements DBWritable, Writable

A Class that does nothing, implementing DBWritable


Constructor Summary
DBInputFormat.NullDBWritable()
           
 
Method Summary
 void readFields(DataInput in)
          Deserialize the fields of this object from in.
 void readFields(ResultSet arg0)
          Reads the fields of the object from the ResultSet.
 void write(DataOutput out)
          Serialize the fields of this object to out.
 void write(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(DataInput in)
                throws 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:
IOException

readFields

public void readFields(ResultSet arg0)
                throws 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:
SQLException

write

public void write(DataOutput out)
           throws 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:
IOException

write

public void write(PreparedStatement arg0)
           throws 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:
SQLException


Copyright © 2009 The Apache Software Foundation