/*
 *  Copyright 2012 The MyBatis Team
 *
 *  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.mybatis.generator.plugins;

import java.util.List;
import java.util.StringTokenizer;

import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;

/**
 * This plugin can be used to specify columns that act as a primary key, even
 * if they are not strictly defined as primary keys in the database.
 * 
 * To use the plugin, add a property to the table configuration
 * specifying a comma delimited list of column names to use as a primary
 * key:
 * 
 * <table...>
 *   <property name="virtualKeyColumns" value="ID1,ID2"/>
 * </table>
 * 
 * @author Jeff Butler
 *
 */
public class VirtualPrimaryKeyPlugin extends PluginAdapter {

    public boolean validate(List<String> warnings) {
        return true;
    }

    @Override
    public void initialized(IntrospectedTable introspectedTable) {
        String virtualKey =
        introspectedTable.getTableConfiguration().getProperty("virtualKeyColumns");
        
        if (virtualKey != null) {
            StringTokenizer st = new StringTokenizer(virtualKey, ", ", false);
            while (st.hasMoreTokens()) {
                String column = st.nextToken();
                introspectedTable.addPrimaryKeyColumn(column);
            }
        }
    }
}

Add virtual primary key plugin