/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.mappings.transformers; | |
import org.eclipse.persistence.sessions.Session; | |
/** | |
* <p><b>Purpose</b>: Allows a field to always be mapped to a constant value. | |
* This allows default values to be provided for un-mapped fields. | |
* @see org.eclipse.persistence.mappings.FieldTransformer | |
* @author James Sutherland | |
* @since 10.1.3 | |
*/ | |
public class ConstantTransformer extends FieldTransformerAdapter { | |
protected Object value; | |
public ConstantTransformer() { | |
super(); | |
} | |
/** | |
* PUBLIC: | |
* Return a constant transformer for the constant value. | |
*/ | |
public ConstantTransformer(Object value) { | |
this.value = value; | |
} | |
/** | |
* PUBLIC: | |
* Return the value of the constant. | |
*/ | |
public Object getValue() { | |
return value; | |
} | |
/** | |
* PUBLIC: | |
* Set the value of the constant. | |
*/ | |
public void setValue(Object value) { | |
this.value = value; | |
} | |
/** | |
* INTERNAL: | |
* Always return the constant value. | |
*/ | |
public Object buildFieldValue(Object object, String fieldName, Session session) { | |
return value; | |
} | |
} |