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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 Table-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
*/
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
*/
Object getColumnValue(Object propertyData);
}
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