org.postgis.hibernate.GeometryType.java Source code

Introduction

Here is the source code for org.postgis.hibernate.GeometryType.java

Source

/*
 * GeometryType.java
 * 
 * PostGIS extension for PostgreSQL JDBC driver - EJB3 Tutorial
 * 
 * (C) 2006  Norman Barker <norman.barker@gmail.com>
 * 
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 2.1 of the License.
 * 
 * This library 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 library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit the web at
 * http://www.gnu.org.
 * 
 */
package org.postgis.hibernate;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.sql.Blob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import java.io.InputStream;
import org.postgis.Geometry;
import org.postgis.binary.BinaryParser;
import org.postgis.binary.BinaryWriter;

/**
 * @author nbarker $date 16/8/06
 */
public class GeometryType implements UserType {
    private static final int[] SQL_TYPES = { Types.BLOB };

    /**
     * @see org.hibernate.usertype.UserType#deepCopy(java.lang.Object)
     */
    public Object deepCopy(Object value) throws HibernateException {
        return value;
    }

    /**
     * @see org.hibernate.usertype.UserType#equals(java.lang.Object, java.lang.Object)
     */
    public boolean equals(Object x, Object y) throws HibernateException {
        if (x == y) {
            return true;
        } else if (x == null || y == null) {
            return false;
        } else {
            return x.equals(y);
        }
    }

    /**
     * @see org.hibernate.usertype.UserType#hashCode(java.lang.Object)
     */
    public int hashCode(Object arg0) throws HibernateException {
        // TODO Auto-generated method stub
        return 0;
    }

    /**
     * @see org.hibernate.usertype.UserType#isMutable()
     */
    public boolean isMutable() {
        return false;
    }

    /**)
     * @see org.hibernate.usertype.UserType#nullSafeGet(java.sql.ResultSet, java.lang.String[], java.lang.Object)
     */
    public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
            throws HibernateException, SQLException {
        Geometry result = null;
        String geom = resultSet.getString(names[0]);
        if (geom != null) {
            BinaryParser parser = new BinaryParser();
            result = parser.parse(geom);
        }
        return result;
    }

    /**
     * @see org.hibernate.usertype.UserType#nullSafeSet(java.sql.PreparedStatement, java.lang.Object, int)
     */
    public void nullSafeSet(PreparedStatement statement, Object value, int index)
            throws HibernateException, SQLException {
        if (value == null) {
            statement.setBytes(index, null);
        } else {
            BinaryWriter bw = new BinaryWriter();

            byte[] bytes = bw.writeBinary((Geometry) value);
            statement.setBytes(index, bytes);
        }
    }

    /* (non-Javadoc)
     * @see org.hibernate.usertype.UserType#replace(java.lang.Object, java.lang.Object, java.lang.Object)
     */
    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }

    /* (non-Javadoc)
     * @see org.hibernate.usertype.UserType#returnedClass()
     */
    public Class returnedClass() {
        return Geometry.class;
    }

    /**
     * @see org.hibernate.usertype.UserType#sqlTypes()
     */
    public int[] sqlTypes() {
        return GeometryType.SQL_TYPES;
    }

    /**
     * @see org.hibernate.usertype.UserType#assemble(java.io.Serializable, java.lang.Object)
     */
    public Object assemble(Serializable cached, Object owner) throws HibernateException {
        return cached;
    }

    /**
     * @see org.hibernate.usertype.UserType#disassemble(java.lang.Object)
     */
    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable) value;
    }

}