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Hibernate example source code file (BooleanTypeDescriptor.java)

This example Hibernate source code file (BooleanTypeDescriptor.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

boolean, booleantypedescriptor, booleantypedescriptor, false, string, string, suppresswarnings, suppresswarnings, true, unnecessaryboxing, wrapperoptions, x, x, y

The Hibernate BooleanTypeDescriptor.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 org.hibernate.type.descriptor.WrapperOptions;

import static java.lang.Boolean.FALSE;
import static java.lang.Boolean.TRUE;

/**
 * Descriptor for {@link Boolean} handling.
 *
 * @author Steve Ebersole
 */
public class BooleanTypeDescriptor extends AbstractTypeDescriptor<Boolean> {
	public static final BooleanTypeDescriptor INSTANCE = new BooleanTypeDescriptor();

	private final char characterValueTrue;
	private final char characterValueFalse;

	private final char characterValueTrueLC;

	private final String stringValueTrue;
	private final String stringValueFalse;

	public BooleanTypeDescriptor() {
		this( 'Y', 'N' );
	}

	public BooleanTypeDescriptor(char characterValueTrue, char characterValueFalse) {
		super( Boolean.class );
		this.characterValueTrue = Character.toUpperCase( characterValueTrue );
		this.characterValueFalse = Character.toUpperCase( characterValueFalse );

		characterValueTrueLC = Character.toLowerCase( characterValueTrue );

		stringValueTrue = String.valueOf( characterValueTrue );
		stringValueFalse = String.valueOf( characterValueFalse );
	}

	public String toString(Boolean value) {
		return value == null ? null : value.toString();
	}

	public Boolean fromString(String string) {
		return Boolean.valueOf( string );
	}

	@SuppressWarnings({ "unchecked" })
	public <X> X unwrap(Boolean value, Class type, WrapperOptions options) {
		if ( value == null ) {
			return null;
		}
		if ( Boolean.class.isAssignableFrom( type ) ) {
			return (X) value;
		}
		if ( Byte.class.isAssignableFrom( type ) ) {
			return (X) toByte( value );
		}
		if ( Short.class.isAssignableFrom( type ) ) {
			return (X) toShort( value );
		}
		if ( Integer.class.isAssignableFrom( type ) ) {
			return (X) toInteger( value );
		}
		if ( Long.class.isAssignableFrom( type ) ) {
			return (X) toInteger( value );
		}
		if ( Character.class.isAssignableFrom( type ) ) {
			return (X) Character.valueOf( value ? characterValueTrue : characterValueFalse );
		}
		if ( String.class.isAssignableFrom( type ) ) {
			return (X) (value ? stringValueTrue : stringValueFalse);
		}
		throw unknownUnwrap( type );
	}

	@SuppressWarnings({ "UnnecessaryUnboxing" })
	public <X> Boolean wrap(X value, WrapperOptions options) {
		if ( value == null ) {
			return null;
		}
		if ( Boolean.class.isInstance( value ) ) {
			return (Boolean) value;
		}
		if ( Number.class.isInstance( value ) ) {
			final int intValue = ( (Number) value ).intValue();
			return intValue == 0 ? FALSE : TRUE;
		}
		if ( Character.class.isInstance( value ) ) {
			return isTrue( ( (Character) value ).charValue() ) ? TRUE : FALSE;
		}
		if ( String.class.isInstance( value ) ) {
			return isTrue( ( (String) value ).charAt( 0 ) ) ? TRUE : FALSE;
		}
		throw unknownWrap( value.getClass() );
	}

	private boolean isTrue(char charValue) {
		return charValue == characterValueTrue || charValue == characterValueTrueLC;
	}

	public int toInt(Boolean value) {
		return value ? 1 : 0;
	}

	@SuppressWarnings({ "UnnecessaryBoxing" })
	public Byte toByte(Boolean value) {
		return Byte.valueOf( (byte) toInt( value ) );
	}

	@SuppressWarnings({ "UnnecessaryBoxing" })
	public Short toShort(Boolean value) {
		return Short.valueOf( (short ) toInt( value ) );
	}

	@SuppressWarnings({ "UnnecessaryBoxing" })
	public Integer toInteger(Boolean value) {
		return Integer.valueOf( toInt( value ) );
	}

	@SuppressWarnings({ "UnnecessaryBoxing" })
	public Long toLong(Boolean value) {
		return Long.valueOf( toInt( value ) );
	}
}

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