Hibernate example source code file (CasterStringType.java)

This example Hibernate source code file (CasterStringType.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

cast, cast, casterstringtype, class, hibernateexception, hibernateexception, io, jdbc, object, object, serializable, sessionimplementor, sql, sqlexception, string, string, usertype, util

The Hibernate CasterStringType.java source code

//$Id$
package org.hibernate.test.annotations.entity;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;

/**
 * Sample of parameter type
 *
 * @author Emmanuel Bernard
 */
public class CasterStringType implements UserType, ParameterizedType {
	private static final String CAST = "cast";
	private Properties parameters;

	public int[] sqlTypes() {
		return new int[]{Types.VARCHAR};
	}

	public Class returnedClass() {
		return String.class;
	}

	public boolean equals(Object x, Object y) throws HibernateException {
		return ( x == y ) || ( x != null && x.equals( y ) );
	}

	public int hashCode(Object x) throws HibernateException {
		return x.hashCode();
	}

	public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner) throws HibernateException, SQLException {
		String result = rs.getString( names[0] );
		if ( rs.wasNull() ) return null;
		if ( parameters.getProperty( CAST ).equals( "lower" ) ) {
			return result.toLowerCase();
		}
		else {
			return result.toUpperCase();
		}
	}

	public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session) throws HibernateException, SQLException {
		if ( value == null ) {
			st.setNull( index, sqlTypes()[0] );
		}
		else {
			String string = (String) value;
			if ( parameters.getProperty( CAST ).equals( "lower" ) ) {
				string = string.toLowerCase();
			}
			else {
				string = string.toUpperCase();
			}
			st.setString( index, string );
		}
	}

	public Object deepCopy(Object value) throws HibernateException {
		return value;
	}

	public boolean isMutable() {
		return false;
	}

	public Serializable disassemble(Object value) throws HibernateException {
		return (Serializable) value;
	}

	public Object assemble(Serializable cached, Object owner) throws HibernateException {
		return cached;
	}

	public Object replace(Object original, Object target, Object owner) throws HibernateException {
		return original;
	}

	public void setParameterValues(Properties parameters) {
		this.parameters = parameters;
	}
}