/*
* Copyright 2011, Mysema Ltd
*
* 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 com.mysema.query.jpa.impl;
import javax.annotation.Nullable;
import javax.inject.Provider;
import javax.persistence.EntityManager;
import com.mysema.query.jpa.JPASubQuery;
import com.mysema.query.jpa.JPQLQueryFactory;
import com.mysema.query.jpa.JPQLTemplates;
import com.mysema.query.types.EntityPath;
/**
* Factory class for query and DML clause creation
*
* @author tiwe
*
*/
public class JPAQueryFactory implements JPQLQueryFactory {
@Nullable
private final JPQLTemplates templates;
private final Provider<EntityManager> entityManager;
public JPAQueryFactory(Provider<EntityManager> entityManager) {
this.entityManager = entityManager;
this.templates = null;
}
public JPAQueryFactory(JPQLTemplates templates, Provider<EntityManager> entityManager) {
this.entityManager = entityManager;
this.templates = templates;
}
@Override
public JPADeleteClause delete(EntityPath<?> path) {
if (templates != null) {
return new JPADeleteClause(entityManager.get(), path, templates);
} else {
return new JPADeleteClause(entityManager.get(), path);
}
}
@Override
public JPAQuery from(EntityPath<?> from) {
return query().from(from);
}
@Override
public JPAUpdateClause update(EntityPath<?> path) {
if (templates != null) {
return new JPAUpdateClause(entityManager.get(), path, templates);
} else {
return new JPAUpdateClause(entityManager.get(), path);
}
}
@Override
public JPAQuery query() {
if (templates != null) {
return new JPAQuery(entityManager.get(), templates);
} else {
return new JPAQuery(entityManager.get());
}
}
@Override
public JPASubQuery subQuery() {
return new JPASubQuery();
}
}