Hibernate example source code file (DoubleStringType.java)

This example Hibernate source code file (DoubleStringType.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

class, compositeusertype, hibernateexception, hibernateexception, io, jdbc, object, object, serializable, sessionimplementor, sessionimplementor, sql, sqlexception, string, string, type, types

The Hibernate DoubleStringType.java source code

//$Id: DoubleStringType.java 4599 2004-09-26 05:18:27Z oneovthafew $
package org.hibernate.test.legacy;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.StringType;
import org.hibernate.type.Type;
import org.hibernate.usertype.CompositeUserType;

public class DoubleStringType implements CompositeUserType {

	private static final int[] TYPES = { Types.VARCHAR, Types.VARCHAR };

	public int[] sqlTypes() {
		return TYPES;
	}

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

	public boolean equals(Object x, Object y) {
		if (x==y) return true;
		if (x==null || y==null) return false;
		return ( (String[]) x )[0].equals( ( (String[]) y )[0] ) && ( (String[]) x )[1].equals( ( (String[]) y )[1] );
	}

	public int hashCode(Object x) throws HibernateException {
		String[] a = (String[]) x;
		return a[0].hashCode() + 31 * a[1].hashCode(); 
	}

	public Object deepCopy(Object x) {
		if (x==null) return null;
		String[] result = new String[2];
		String[] input = (String[]) x;
		result[0] = input[0];
		result[1] = input[1];
		return result;
	}

	public boolean isMutable() { return true; }

	public Object nullSafeGet(ResultSet rs,	String[] names, SessionImplementor session,	Object owner)
	throws HibernateException, SQLException {

		String first = StringType.INSTANCE.nullSafeGet( rs, names[0], session );
		String second = StringType.INSTANCE.nullSafeGet( rs, names[1], session );

		return ( first==null && second==null ) ? null : new String[] { first, second };
	}

	public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
	throws HibernateException, SQLException {

		String[] strings = (value==null) ? new String[2] : (String[]) value;

		StringType.INSTANCE.nullSafeSet( st, strings[0], index, session );
		StringType.INSTANCE.nullSafeSet( st, strings[1], index+1, session );
	}

	public String[] getPropertyNames() {
		return new String[] { "s1", "s2" };
	}

	public Type[] getPropertyTypes() {
		return new Type[] { StringType.INSTANCE, StringType.INSTANCE };
	}

	public Object getPropertyValue(Object component, int property) {
		return ( (String[]) component )[property];
	}

	public void setPropertyValue(
		Object component,
		int property,
		Object value) {

		( (String[]) component )[property] = (String) value;
	}

	public Object assemble(
		Serializable cached,
		SessionImplementor session,
		Object owner) {

		return deepCopy(cached);
	}

	public Serializable disassemble(Object value, SessionImplementor session) {
		return (Serializable) deepCopy(value);
	}
	
	public Object replace(Object original, Object target, SessionImplementor session, Object owner) 
	throws HibernateException {
		return original;
	}

}