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The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented
applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or
annotations. Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping
tools.
/*
* Copyright 2009-2012 the original author or authors.
*
* 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.ibatis.executor.result;
import java.util.Map;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.ResultContext;
import org.apache.ibatis.session.ResultHandler;
/**
* @author Clinton Begin
*/
public class DefaultMapResultHandler implements ResultHandler {
private final Map mappedResults;
private final String mapKey;
private final ObjectFactory objectFactory;
private final ObjectWrapperFactory objectWrapperFactory;
@SuppressWarnings("unchecked")
public DefaultMapResultHandler(String mapKey, ObjectFactory objectFactory, ObjectWrapperFactory objectWrapperFactory) {
this.objectFactory = objectFactory;
this.objectWrapperFactory = objectWrapperFactory;
this.mappedResults = objectFactory.create(Map.class);
this.mapKey = mapKey;
}
public void handleResult(ResultContext context) {
// TODO is that assignment always true?
final V value = (V) context.getResultObject();
final MetaObject mo = MetaObject.forObject(value, objectFactory, objectWrapperFactory);
// TODO is that assignment always true?
final K key = (K) mo.getValue(mapKey);
mappedResults.put(key, value);
}
public Map getMappedResults() {
return mappedResults;
}
}
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