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JPA support for Querydsl
There is a newer version: 6.10.1
/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * 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.querydsl.jpa.hibernate;

import com.querydsl.core.DefaultQueryMetadata;
import com.querydsl.core.QueryMetadata;
import com.querydsl.core.Tuple;
import com.querydsl.core.types.Expression;
import com.querydsl.jpa.HQLTemplates;
import com.querydsl.jpa.JPQLQuery;
import com.querydsl.jpa.JPQLTemplates;
import org.hibernate.Session;
import org.hibernate.StatelessSession;

/**
 * {@code HibernateQuery} is the default implementation of the JPQLQuery interface for Hibernate
 *
 * @param  result type
 * @author tiwe
 */
public class HibernateQuery extends AbstractHibernateQuery>
    implements JPQLQuery {

  /** Creates a detached query The query can be attached via the clone method */
  public HibernateQuery() {
    super(NoSessionHolder.DEFAULT, HQLTemplates.DEFAULT, new DefaultQueryMetadata());
  }

  /**
   * Creates a new Session bound query
   *
   * @param session session
   */
  public HibernateQuery(Session session) {
    super(new DefaultSessionHolder(session), HQLTemplates.DEFAULT, new DefaultQueryMetadata());
  }

  /**
   * Creates a new Session bound query
   *
   * @param session session
   */
  public HibernateQuery(Session session, QueryMetadata metadata) {
    super(new DefaultSessionHolder(session), HQLTemplates.DEFAULT, metadata);
  }

  /**
   * Creates a new Session bound query
   *
   * @param session session
   * @param templates templates
   */
  public HibernateQuery(Session session, JPQLTemplates templates) {
    super(new DefaultSessionHolder(session), templates, new DefaultQueryMetadata());
  }

  /**
   * Creates a new Stateless session bound query
   *
   * @param session session
   */
  public HibernateQuery(StatelessSession session) {
    super(new StatelessSessionHolder(session), HQLTemplates.DEFAULT, new DefaultQueryMetadata());
  }

  /**
   * Creates a new Session bound query
   *
   * @param session session
   * @param templates templates
   */
  public HibernateQuery(SessionHolder session, JPQLTemplates templates) {
    super(session, templates, new DefaultQueryMetadata());
  }

  /**
   * Creates a new Session bound query
   *
   * @param session session
   * @param templates templates
   * @param metadata query metadata
   */
  public HibernateQuery(SessionHolder session, JPQLTemplates templates, QueryMetadata metadata) {
    super(session, templates, metadata);
  }

  @Override
  protected HibernateQuery clone(SessionHolder sessionHolder) {
    HibernateQuery q =
        new HibernateQuery(sessionHolder, getTemplates(), getMetadata().clone());
    q.clone(this);
    return q;
  }

  @Override
  public  HibernateQuery select(Expression expr) {
    queryMixin.setProjection(expr);
    @SuppressWarnings("unchecked") // This is the new type
    HibernateQuery newType = (HibernateQuery) this;
    return newType;
  }

  @Override
  public HibernateQuery select(Expression... exprs) {
    queryMixin.setProjection(exprs);
    @SuppressWarnings("unchecked") // This is the new type
    HibernateQuery newType = (HibernateQuery) this;
    return newType;
  }
}