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/*
 *  Copyright 2001-2012 Stephen Colebourne
 *
 *  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 org.joda.time.contrib.hibernate;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;

import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.Type;
import org.hibernate.usertype.CompositeUserType;
import org.joda.time.DateTime;
import org.joda.time.Interval;

/**
 * Persist {@link org.joda.time.Interval} via hibernate. Internally, this class
 * collaborates with {@link org.joda.time.contrib.hibernate.PersistentDateTime}
 * to convert the start and end components of an Interval to and from the
 * database correspondents. This class allows clients to execute hibernate or
 * JPA queries using the attribute names "start" and "end." For example,
 * 
*
* "from Foo where :date is between barInterval.start and barInterval.end" *
* * @author Christopher R. Gardner ([email protected]) */ public class PersistentInterval implements CompositeUserType, Serializable { private static final String[] PROPERTY_NAMES = new String[] { "start", "end" }; private static final Type[] TYPES = new Type[] { StandardBasicTypes.TIMESTAMP, StandardBasicTypes.TIMESTAMP }; public Object assemble(Serializable cached, SessionImplementor session, Object owner) throws HibernateException { return cached; } public Object deepCopy(Object value) throws HibernateException { return value; } public Serializable disassemble(Object value, SessionImplementor session) throws HibernateException { return (Serializable) value; } public boolean equals(Object x, Object y) throws HibernateException { if (x == y) { return true; } if (x == null || y == null) { return false; } return x.equals(y); } public String[] getPropertyNames() { return PROPERTY_NAMES; } public Type[] getPropertyTypes() { return TYPES; } public Object getPropertyValue(Object component, int property) throws HibernateException { Interval interval = (Interval) component; return (property == 0) ? interval.getStart().toDate() : interval.getEnd().toDate(); } public int hashCode(Object x) throws HibernateException { return x.hashCode(); } public boolean isMutable() { return false; } public Object nullSafeGet(ResultSet resultSet, String[] names, SessionImplementor session, Object owner) throws HibernateException, SQLException { if (resultSet == null) { return null; } PersistentDateTime pst = new PersistentDateTime(); DateTime start = (DateTime) pst.nullSafeGet(resultSet, names[0]); DateTime end = (DateTime) pst.nullSafeGet(resultSet, names[1]); if (start == null || end == null) { return null; } return new Interval(start, end); } public void nullSafeSet(PreparedStatement statement, Object value, int index, SessionImplementor session) throws HibernateException, SQLException { if (value == null) { statement.setNull(index, StandardBasicTypes.TIMESTAMP.sqlType()); statement.setNull(index + 1, StandardBasicTypes.TIMESTAMP.sqlType()); return; } Interval interval = (Interval) value; statement.setTimestamp(index, asTimeStamp(interval.getStart())); statement.setTimestamp(index + 1, asTimeStamp(interval.getEnd())); } private Timestamp asTimeStamp(DateTime time) { return new Timestamp(time.getMillis()); } public Object replace(Object original, Object target, SessionImplementor session, Object owner) throws HibernateException { return original; } public Class returnedClass() { return Interval.class; } public void setPropertyValue(Object component, int property, Object value) throws HibernateException { throw new UnsupportedOperationException("Immutable Interval"); } }




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