/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.type;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.UUID;

import org.hibernate.type.descriptor.ValueBinder;
import org.hibernate.type.descriptor.ValueExtractor;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
import org.hibernate.type.descriptor.java.UUIDTypeDescriptor;
import org.hibernate.type.descriptor.sql.BasicBinder;
import org.hibernate.type.descriptor.sql.BasicExtractor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;

/**
 * Specialized type mapping for {@link UUID} and the Postgres UUID data type (which is mapped as OTHER in its
 * JDBC driver).
 *
 * @author Steve Ebersole
 * @author David Driscoll
 */
public class PostgresUUIDType extends AbstractSingleColumnStandardBasicType<UUID> {
	public static final PostgresUUIDType INSTANCE = new PostgresUUIDType();

	public PostgresUUIDType() {
		super( PostgresUUIDSqlTypeDescriptor.INSTANCE, UUIDTypeDescriptor.INSTANCE );
	}

	public String getName() {
		return "pg-uuid";
	}

	public static class PostgresUUIDSqlTypeDescriptor implements SqlTypeDescriptor {
		public static final PostgresUUIDSqlTypeDescriptor INSTANCE = new PostgresUUIDSqlTypeDescriptor();

		public int getSqlType() {
			// ugh
			return Types.OTHER;
		}

		@Override
		public boolean canBeRemapped() {
			return true;
		}

		public <X> ValueBinder<X> getBinder(final JavaTypeDescriptor<X> javaTypeDescriptor) {
			return new BasicBinder<X>( javaTypeDescriptor, this ) {
				@Override
				protected void doBind(PreparedStatement st, X value, int index, WrapperOptions options) throws SQLException {
					st.setObject( index, javaTypeDescriptor.unwrap( value, UUID.class, options ), getSqlType() );
				}
			};
		}

		public <X> ValueExtractor<X> getExtractor(final JavaTypeDescriptor<X> javaTypeDescriptor) {
			return new BasicExtractor<X>( javaTypeDescriptor, this ) {
				@Override
				protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
					return javaTypeDescriptor.wrap( rs.getObject( name ), options );
				}
			};
		}
	}
}