Hibernate example source code file (ParameterBinder.java)

This example Hibernate source code file (ParameterBinder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

hibernateexception, hibernateexception, jdbc, namedparametersource, parameterbinder, preparedstatement, preparedstatement, queryparameters, sessionimplementor, sessionimplementor, sql, sqlexception, sqlexception, string, type, typedvalue, util

The Hibernate ParameterBinder.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, Red Hat Inc. 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 Inc.
 *
 * 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.engine.internal;

import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Iterator;
import java.util.Map;

import org.jboss.logging.Logger;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.type.Type;

/**
 * Centralizes the commonality regarding binding of parameter values into PreparedStatements as this logic is
 * used in many places.
 * <p/>
 * Ideally would like to move to the parameter handling as it is done in the hql.ast package.
 *
 * @author Steve Ebersole
 */
public class ParameterBinder {

    private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, ParameterBinder.class.getName());

	public static interface NamedParameterSource {
		public int[] getNamedParameterLocations(String name);
	}

	private ParameterBinder() {
	}

	public static int bindQueryParameters(
	        final PreparedStatement st,
	        final QueryParameters queryParameters,
	        final int start,
	        final NamedParameterSource source,
	        SessionImplementor session) throws SQLException, HibernateException {
		int col = start;
		col += bindPositionalParameters( st, queryParameters, col, session );
		col += bindNamedParameters( st, queryParameters, col, source, session );
		return col;
	}

	public static int bindPositionalParameters(
	        final PreparedStatement st,
	        final QueryParameters queryParameters,
	        final int start,
	        final SessionImplementor session) throws SQLException, HibernateException {
		return bindPositionalParameters(
		        st,
		        queryParameters.getPositionalParameterValues(),
		        queryParameters.getPositionalParameterTypes(),
		        start,
		        session
		);
	}

	public static int bindPositionalParameters(
	        final PreparedStatement st,
	        final Object[] values,
	        final Type[] types,
	        final int start,
	        final SessionImplementor session) throws SQLException, HibernateException {
		int span = 0;
		for ( int i = 0; i < values.length; i++ ) {
			types[i].nullSafeSet( st, values[i], start + span, session );
			span += types[i].getColumnSpan( session.getFactory() );
		}
		return span;
	}

	public static int bindNamedParameters(
	        final PreparedStatement ps,
	        final QueryParameters queryParameters,
	        final int start,
	        final NamedParameterSource source,
	        final SessionImplementor session) throws SQLException, HibernateException {
		return bindNamedParameters( ps, queryParameters.getNamedParameters(), start, source, session );
	}

	public static int bindNamedParameters(
	        final PreparedStatement ps,
	        final Map namedParams,
	        final int start,
	        final NamedParameterSource source,
	        final SessionImplementor session) throws SQLException, HibernateException {
		if ( namedParams != null ) {
			// assumes that types are all of span 1
			Iterator iter = namedParams.entrySet().iterator();
			int result = 0;
			while ( iter.hasNext() ) {
				Map.Entry e = ( Map.Entry ) iter.next();
				String name = ( String ) e.getKey();
				TypedValue typedval = (TypedValue) e.getValue();
				int[] locations = source.getNamedParameterLocations( name );
				for ( int i = 0; i < locations.length; i++ ) {
                    LOG.debugf("bindNamedParameters() %s -> %s [%s]", typedval.getValue(), name, locations[i] + start);
					typedval.getType().nullSafeSet( ps, typedval.getValue(), locations[i] + start, session );
				}
				result += locations.length;
			}
			return result;
		}
        return 0;
	}
}