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Hibernate example source code file (CalendarDateTypeDescriptor.java)

This example Hibernate source code file (CalendarDateTypeDescriptor.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

abstracttypedescriptor, calendar, calendar, calendardatetypedescriptor, calendardatetypedescriptor, class, comparator, date, date, gregoriancalendar, override, util, wrapperoptions, x, x

The Hibernate CalendarDateTypeDescriptor.java source code

/*
 * 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.descriptor.java;

import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
import java.util.GregorianCalendar;

import org.hibernate.cfg.Environment;
import org.hibernate.internal.util.compare.CalendarComparator;
import org.hibernate.type.descriptor.WrapperOptions;

/**
 * Descriptor for {@link java.util.Calendar} handling, but just for the date (month, day, year) portion.
 *
 * @author Steve Ebersole
 */
public class CalendarDateTypeDescriptor extends AbstractTypeDescriptor<Calendar> {
	public static final CalendarDateTypeDescriptor INSTANCE = new CalendarDateTypeDescriptor();

	protected CalendarDateTypeDescriptor() {
		super( Calendar.class, CalendarTypeDescriptor.CalendarMutabilityPlan.INSTANCE );
	}

	public String toString(Calendar value) {
		return DateTypeDescriptor.INSTANCE.toString( value.getTime() );
	}

	public Calendar fromString(String string) {
		Calendar result = new GregorianCalendar();
		result.setTime( DateTypeDescriptor.INSTANCE.fromString( string ) );
		return result;
	}

	@Override
	public boolean areEqual(Calendar one, Calendar another) {
		if ( one == another ) {
			return true;
		}
		if ( one == null || another == null ) {
			return false;
		}

		return one.get(Calendar.DAY_OF_MONTH) == another.get(Calendar.DAY_OF_MONTH)
			&& one.get(Calendar.MONTH) == another.get(Calendar.MONTH)
			&& one.get(Calendar.YEAR) == another.get(Calendar.YEAR);
	}

	@Override
	public int extractHashCode(Calendar value) {
		int hashCode = 1;
		hashCode = 31 * hashCode + value.get(Calendar.DAY_OF_MONTH);
		hashCode = 31 * hashCode + value.get(Calendar.MONTH);
		hashCode = 31 * hashCode + value.get(Calendar.YEAR);
		return hashCode;
	}

	@Override
	public Comparator<Calendar> getComparator() {
		return CalendarComparator.INSTANCE;
	}

	@SuppressWarnings({ "unchecked" })
	public <X> X unwrap(Calendar value, Class type, WrapperOptions options) {
		if ( value == null ) {
			return null;
		}
		if ( Calendar.class.isAssignableFrom( type ) ) {
			return (X) value;
		}
		if ( java.sql.Date.class.isAssignableFrom( type ) ) {
			return (X) new java.sql.Date( value.getTimeInMillis() );
		}
		if ( java.sql.Time.class.isAssignableFrom( type ) ) {
			return (X) new java.sql.Time( value.getTimeInMillis() );
		}
		if ( java.sql.Timestamp.class.isAssignableFrom( type ) ) {
			return (X) new java.sql.Timestamp( value.getTimeInMillis() );
		}
		if ( Date.class.isAssignableFrom( type ) ) {
			return (X) new  Date( value.getTimeInMillis() );
		}
		throw unknownUnwrap( type );
	}

	public <X> Calendar wrap(X value, WrapperOptions options) {
		if ( value == null ) {
			return null;
		}
		if ( Calendar.class.isInstance( value ) ) {
			return (Calendar) value;
		}

		if ( ! Date.class.isInstance( value ) ) {
			throw unknownWrap( value.getClass() );
		}

		Calendar cal = new GregorianCalendar();
		if ( Environment.jvmHasTimestampBug() ) {
			final long milliseconds = ( (Date) value ).getTime();
			final long nanoseconds = java.sql.Timestamp.class.isInstance( value )
					? ( (java.sql.Timestamp) value ).getNanos()
					: 0;
			cal.setTime( new Date( milliseconds + nanoseconds / 1000000 ) );
		}
		else {
			cal.setTime( (Date) value );
		}
		return cal;
	}
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate CalendarDateTypeDescriptor.java source code file:

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