org.springframework.data.jpa.repository.support.QuerydslUtils Maven / Gradle / Ivy
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Spring Data module to provide sophisticated support for JPA repositories
/*
* Copyright 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.springframework.data.jpa.repository.support;
import javax.persistence.EntityManager;
import com.mysema.query.jpa.EclipseLinkTemplates;
import com.mysema.query.jpa.HQLTemplates;
import com.mysema.query.jpa.JPQLQuery;
import com.mysema.query.jpa.OpenJPATemplates;
import com.mysema.query.jpa.impl.JPAQuery;
/**
* Utility methods for Querydsl.
*
* @author Oliver Gierke
*/
class QuerydslUtils {
private QuerydslUtils() {
}
/**
* Creates the {@link JPQLQuery} instance based on the given {@link EntityManager} and {@link PersistenceProvider}.
*
* @return
*/
public static JPQLQuery createQueryInstance(EntityManager em, PersistenceProvider provider) {
switch (provider) {
case ECLIPSELINK:
return new JPAQuery(em, EclipseLinkTemplates.DEFAULT);
case HIBERNATE:
return new JPAQuery(em, HQLTemplates.DEFAULT);
case OPEN_JPA:
return new JPAQuery(em, OpenJPATemplates.DEFAULT);
case GENERIC_JPA:
default:
return new JPAQuery(em);
}
}
}