/*
* PGgeometry.java
*
* PostGIS extension for PostgreSQL JDBC driver - PGobject Geometry Wrapper
*
* (C) 2004 Paul Ramsey, pramsey@refractions.net
*
* (C) 2005 Markus Schaber, markus.schaber@logix-tt.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.
*
* $Id$
*/
package org.postgis;
import org.postgis.binary.BinaryParser;
import org.postgresql.util.PGobject;
import java.sql.SQLException;
public class PGgeometry extends PGobject {
/* JDK 1.5 Serialization */
private static final long serialVersionUID = 0x100;
Geometry geom;
BinaryParser bp = new BinaryParser();
public PGgeometry() {
this.setType("geometry");
}
public PGgeometry(Geometry geom) {
this();
this.geom = geom;
}
public PGgeometry(String value) throws SQLException {
this();
setValue(value);
}
public void setValue(String value) throws SQLException {
geom = geomFromString(value, bp);
}
public static Geometry geomFromString(String value) throws SQLException {
return geomFromString(value, false);
}
public static Geometry geomFromString(String value, boolean haveM) throws SQLException {
BinaryParser bp = new BinaryParser();
return geomFromString(value, bp, haveM);
}
/**
* Maybe we could add more error checking here?
*/
public static Geometry geomFromString(String value, BinaryParser bp) throws SQLException {
return geomFromString(value, bp, false);
}
public static Geometry geomFromString(String value, BinaryParser bp, boolean haveM)
throws SQLException {
value = value.trim();
int srid = Geometry.UNKNOWN_SRID;
if (value.startsWith(SRIDPREFIX)) {
// break up geometry into srid and wkt
String[] parts = PGgeometry.splitSRID(value);
value = parts[1].trim();
srid = Geometry.parseSRID(Integer.parseInt(parts[0].substring(5)));
}
Geometry result;
if (value.startsWith("00") || value.startsWith("01")) {
result = bp.parse(value);
} else if (value.endsWith("EMPTY")) {
// We have a standard conforming representation for an empty
// geometry which is to be parsed as an empty GeometryCollection.
result = new GeometryCollection();
} else if (value.startsWith("MULTIPOLYGON")) {
result = new MultiPolygon(value, haveM);
} else if (value.startsWith("MULTILINESTRING")) {
result = new MultiLineString(value, haveM);
} else if (value.startsWith("MULTIPOINT")) {
result = new MultiPoint(value, haveM);
} else if (value.startsWith("POLYGON")) {
result = new Polygon(value, haveM);
} else if (value.startsWith("LINESTRING")) {
result = new LineString(value, haveM);
} else if (value.startsWith("POINT")) {
result = new Point(value, haveM);
} else if (value.startsWith("GEOMETRYCOLLECTION")) {
result = new GeometryCollection(value, haveM);
} else {
throw new SQLException("Unknown type: " + value);
}
if (srid != Geometry.UNKNOWN_SRID) {
result.srid = srid;
}
return result;
}
public Geometry getGeometry() {
return geom;
}
public void setGeometry(Geometry newgeom) {
this.geom = newgeom;
}
public int getGeoType() {
return geom.type;
}
public String toString() {
return geom.toString();
}
public String getValue() {
return geom.toString();
}
public Object clone() {
return new PGgeometry(geom);
}
/** The prefix that indicates SRID presence */
public static final String SRIDPREFIX = "SRID=";
/**
* Splits a String at the first occurrence of border charachter.
*
* Poor man's String.split() replacement, as String.split() was invented at
* jdk1.4, and the Debian PostGIS Maintainer had problems building the woody
* backport of his package using DFSG-free compilers. In all the cases we
* used split() in the org.postgis package, we only needed to split at the
* first occurence, and thus this code could even be faster.
*
* @throws SQLException
*/
public static String[] splitSRID(String whole) throws SQLException {
int index = whole.indexOf(';', 5); // sridprefix length is 5
if (index == -1) {
throw new SQLException("Error parsing Geometry - SRID not delimited with ';' ");
} else {
return new String[]{
whole.substring(0, index),
whole.substring(index + 1)};
}
}
}