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HibernateUtils.java
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HibernateUtils.java
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/*
* Copyright 2016 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
*
* https://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.springframework.data.jpa.provider;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import org.hibernate.Query;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;
/**
* Utility functions to work with Hibernate. Mostly using reflection to make sure common functionality can be executed
* against all the Hibernate version we support.
*
* @since 1.10.2
* @soundtrack Benny Greb - Soulfood (Live, https://www.youtube.com/watch?v=9_ErMa_CtSw)
*/
public abstract class HibernateUtils {
private static final List<String> TYPES = Arrays.asList("org.hibernate.jpa.HibernateQuery",
"org.hibernate.ejb.HibernateQuery");
private static final Method GET_HIBERNATE_QUERY;
private static final Class<?> HIBERNATE_QUERY_INTERFACE;
private static final Method QUERY_STRING_METHOD;
private HibernateUtils() {}
static {
Class<?> type = null;
Method method = null;
ClassLoader classLoader = HibernateUtils.class.getClassLoader();
for (String typeName : TYPES) {
try {
type = ClassUtils.forName(typeName, classLoader);
method = type.getMethod("getHibernateQuery");
} catch (Exception o_O) {}
}
GET_HIBERNATE_QUERY = method;
Class<?> queryInterface = null;
try {
queryInterface = ClassUtils.forName("org.hibernate.query.Query", classLoader);
} catch (Exception o_O) {}
HIBERNATE_QUERY_INTERFACE = queryInterface == null ? type : queryInterface;
QUERY_STRING_METHOD = HIBERNATE_QUERY_INTERFACE == null ? null
: ReflectionUtils.findMethod(HIBERNATE_QUERY_INTERFACE, "getQueryString");
}
/**
* Return the query string of the underlying native Hibernate query.
*
* @param query
* @return
*/
public static String getHibernateQuery(Object query) {
if (HIBERNATE_QUERY_INTERFACE != null && QUERY_STRING_METHOD != null
&& HIBERNATE_QUERY_INTERFACE.isInstance(query)) {
return String.class.cast(ReflectionUtils.invokeMethod(QUERY_STRING_METHOD, query));
}
if (HIBERNATE_QUERY_INTERFACE != null && !HIBERNATE_QUERY_INTERFACE.isInstance(query)) {
query = ((javax.persistence.Query) query).unwrap(HIBERNATE_QUERY_INTERFACE);
}
return ((Query) ReflectionUtils.invokeMethod(GET_HIBERNATE_QUERY, query)).getQueryString();
}
}