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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.das.rdb;
/**
* A lightweight Tabele-column <--> DataObject-property converter framework.
* Converters allow a user to insert a transformation between a column value and
* is destination DataObject property value. For example, by default, a VARCHAR
* column will be represented as a String in its corresponding DataObject
* property. A user could insert a converter that transforms the the VARCHAR
* value to an Integer. If this is done then although the column returns
* character data, the DataObject property will be an Integer
*
*
*/
public interface Converter {
/**
* Transform the columnData object to a new value and possibly new type.
* This should be the invers operation of #getColumnValue
*
* @param columnData
* The column value to transorm
* @return Returns the transformed value
*/
public Object getPropertyValue(Object columnData);
/**
* Transform the columnData object to a new value and possibly new type.
* This should be the invers operation of #getPropertyValue
*
* @param propertyData
* The property value to transform
* @return Returns the transformed value
*/
public Object getColumnValue(Object propertyData);
}
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