Package org.hibernate.impl

Source Code of org.hibernate.impl.AbstractSessionImpl

/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors.  All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA  02110-1301  USA
*
*/
package org.hibernate.impl;

import org.hibernate.MappingException;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.HibernateException;
import org.hibernate.ScrollableResults;
import org.hibernate.SessionException;
import org.hibernate.engine.query.sql.NativeSQLQuerySpecification;
import org.hibernate.engine.NamedQueryDefinition;
import org.hibernate.engine.NamedSQLQueryDefinition;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.QueryParameters;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.query.HQLQueryPlan;
import org.hibernate.engine.query.NativeSQLQueryPlan;

import java.util.List;

/**
* Functionality common to stateless and stateful sessions
*
* @author Gavin King
*/
public abstract class AbstractSessionImpl implements SessionImplementor {

  protected transient SessionFactoryImpl factory;
  private boolean closed = false;

  protected AbstractSessionImpl(SessionFactoryImpl factory) {
    this.factory = factory;
  }

  public SessionFactoryImplementor getFactory() {
    return factory;
  }

  public boolean isClosed() {
    return closed;
  }

  protected void setClosed() {
    closed = true;
  }

  protected void errorIfClosed() {
    if ( closed ) {
      throw new SessionException( "Session is closed!" );
    }
  }

  public Query getNamedQuery(String queryName) throws MappingException {
    errorIfClosed();
    NamedQueryDefinition nqd = factory.getNamedQuery( queryName );
    final Query query;
    if ( nqd != null ) {
      String queryString = nqd.getQueryString();
      query = new QueryImpl(
          queryString,
              nqd.getFlushMode(),
              this,
              getHQLQueryPlan( queryString, false ).getParameterMetadata()
      );
      query.setComment( "named HQL query " + queryName );
    }
    else {
      NamedSQLQueryDefinition nsqlqd = factory.getNamedSQLQuery( queryName );
      if ( nsqlqd==null ) {
        throw new MappingException( "Named query not known: " + queryName );
      }
      query = new SQLQueryImpl(
          nsqlqd,
              this,
              factory.getQueryPlanCache().getSQLParameterMetadata( nsqlqd.getQueryString() )
      );
      query.setComment( "named native SQL query " + queryName );
      nqd = nsqlqd;
    }
    initQuery( query, nqd );
    return query;
  }

  public Query getNamedSQLQuery(String queryName) throws MappingException {
    errorIfClosed();
    NamedSQLQueryDefinition nsqlqd = factory.getNamedSQLQuery( queryName );
    if ( nsqlqd==null ) {
      throw new MappingException( "Named SQL query not known: " + queryName );
    }
    Query query = new SQLQueryImpl(
        nsqlqd,
            this,
            factory.getQueryPlanCache().getSQLParameterMetadata( nsqlqd.getQueryString() )
    );
    query.setComment( "named native SQL query " + queryName );
    initQuery( query, nsqlqd );
    return query;
  }

  private void initQuery(Query query, NamedQueryDefinition nqd) {
    query.setCacheable( nqd.isCacheable() );
    query.setCacheRegion( nqd.getCacheRegion() );
    if ( nqd.getTimeout()!=null ) query.setTimeout( nqd.getTimeout().intValue() );
    if ( nqd.getFetchSize()!=null ) query.setFetchSize( nqd.getFetchSize().intValue() );
    if ( nqd.getCacheMode() != null ) query.setCacheMode( nqd.getCacheMode() );
    query.setReadOnly( nqd.isReadOnly() );
    if ( nqd.getComment() != null ) query.setComment( nqd.getComment() );
  }

  public Query createQuery(String queryString) {
    errorIfClosed();
    QueryImpl query = new QueryImpl(
        queryString,
            this,
            getHQLQueryPlan( queryString, false ).getParameterMetadata()
    );
    query.setComment( queryString );
    return query;
  }

  public SQLQuery createSQLQuery(String sql) {
    errorIfClosed();
    SQLQueryImpl query = new SQLQueryImpl(
        sql,
            this,
            factory.getQueryPlanCache().getSQLParameterMetadata( sql )
    );
    query.setComment( "dynamic native SQL query" );
    return query;
  }

  protected HQLQueryPlan getHQLQueryPlan(String query, boolean shallow) throws HibernateException {
    return factory.getQueryPlanCache().getHQLQueryPlan( query, shallow, getEnabledFilters() );
  }

  protected NativeSQLQueryPlan getNativeSQLQueryPlan(NativeSQLQuerySpecification spec) throws HibernateException {
    return factory.getQueryPlanCache().getNativeSQLQueryPlan( spec );
  }

  public List list(NativeSQLQuerySpecification spec, QueryParameters queryParameters)
      throws HibernateException {
    return listCustomQuery( getNativeSQLQueryPlan( spec ).getCustomQuery(), queryParameters );
  }

  public ScrollableResults scroll(NativeSQLQuerySpecification spec, QueryParameters queryParameters)
      throws HibernateException {
    return scrollCustomQuery( getNativeSQLQueryPlan( spec ).getCustomQuery(), queryParameters );
  }

}
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