org.tranql.field
Class FieldAccessor

java.lang.Object
  org.tranql.field.FieldAccessor

All Implemented Interfaces:

java.io.Serializable, FieldTransform

Direct Known Subclasses:

CacheRowAccessor

public class FieldAccessor
extends java.lang.Object
implements FieldTransform

Public accessor to a row for use at the end of a transform pipeline.

Version:

$Revision: 45 $ $Date: 2004-04-20 00:23:20 +0200 (Tue, 20 Apr 2004) $

See Also:

Serialized Form

Field Summary

protected java.lang.Class	fieldClass
protected int	slot

Constructor Summary

FieldAccessor(int slot, java.lang.Class fieldClass)
Constructor specify the slot this is an accessor for.

Method Summary

java.lang.Object	get(Row row) Return a value from the supplied row.
java.lang.Class	getFieldClass() Return the Java Class that will be returned by fetch and that should be passed to set.
void	set(Row row, java.lang.Object value) Set a value into the supplied row.

Methods inherited from class java.lang.Object

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

Field Detail

fieldClass

protected final java.lang.Class fieldClass

slot

protected final int slot

Constructor Detail

FieldAccessor

public FieldAccessor(int slot,
                     java.lang.Class fieldClass)

Constructor specify the slot this is an accessor for.

Parameters:

slot - the slot whose data this accessor manages

fieldClass - the Class of the Objects the slot will contain

Method Detail

getFieldClass

public java.lang.Class getFieldClass()

Description copied from interface: FieldTransform

Return the Java Class that will be returned by fetch and that should be passed to set.

Specified by:

getFieldClass in interface FieldTransform

Returns:

the Java Class for this field

get

public java.lang.Object get(Row row)

Return a value from the supplied row.

Specified by:

get in interface FieldTransform

Parameters:

row - the row whose data should be returned

Returns:

the value this row contains for this accessor, may be null

set

public void set(Row row,
                java.lang.Object value)

Set a value into the supplied row.

Specified by:

set in interface FieldTransform

Parameters:

row - the row whose data should be set

value - the value to store in the row, may be null