/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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.seasar.framework.jpa.impl;
import java.util.Map;
import java.util.Map.Entry;
import javax.persistence.EntityManager;
import org.seasar.framework.jpa.Dialect;
import org.seasar.framework.jpa.DialectManager;
import org.seasar.framework.jpa.exception.DialectNotFoundException;
import org.seasar.framework.util.tiger.CollectionsUtil;
/**
* {@link DialectManager}の実装クラスです。
*
* @author koichik
*/
public class DialectManagerImpl implements DialectManager {
/** JPA実装が提供する{@link EntityManager}の実装クラスをキー、{@link Dialect}を値とするマップ */
protected Map<Class<?>, Dialect> dialects = CollectionsUtil
.newLinkedHashMap();
public void addDialect(final Class<?> delegateClass, final Dialect dialect) {
dialects.put(delegateClass, dialect);
}
public void removeDialect(final Class<?> delegateClass) {
dialects.remove(delegateClass);
}
public Dialect getDialect(final EntityManager em) {
final Object delegate = em.getDelegate();
for (final Entry<Class<?>, Dialect> entry : dialects.entrySet()) {
if (entry.getKey().isInstance(delegate)) {
return entry.getValue();
}
}
throw new DialectNotFoundException(em);
}
}