/******************************************************************************
* $Id$
*
* Name: OGRTestGC.java
* Project: OGR Java Interface
* Purpose: A sample app for demonstrating the caveats with JNI and garbage collecting...
* Author: Even Rouault, <even dot rouault at mines dash paris dot org>
*
******************************************************************************
* Copyright (c) 2009, Even Rouault
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
import org.gdal.ogr.ogr;
import org.gdal.ogr.Feature;
import org.gdal.ogr.FeatureDefn;
import org.gdal.ogr.Geometry;
/* This test should run fine as we use a smarter GC for */
/* Geometry and Feature objects */
public class OGRTestGC
{
public static void main(String[] args)
{
FeatureDefn featureDefn = new FeatureDefn();
Geometry point1 = new Geometry(ogr.wkbPoint);
Geometry multipoint1 = new Geometry(ogr.wkbMultiPoint);
multipoint1.AddGeometryDirectly(point1);
try
{
/* Just to show that we are smart ! */
multipoint1.AddGeometryDirectly(point1);
System.err.println("should not reach that point");
}
catch(RuntimeException re)
{
}
Geometry multipoint2 = new Geometry(ogr.wkbMultiPoint);
multipoint2.AddGeometry(multipoint1.GetGeometryRef(0));
try
{
/* Just to show that we are smart ! */
multipoint2.AddGeometryDirectly(multipoint1.GetGeometryRef(0));
System.err.println("should not reach that point");
}
catch(RuntimeException re)
{
}
Geometry point3 = new Geometry(ogr.wkbPoint);
new Feature(featureDefn).SetGeometryDirectly(point3);
multipoint1 = null;
for (int i = 0; i < 500000; i++)
{
if ((i % 100000) == 0) System.out.println(i);
Feature feat = new Feature(featureDefn);
feat.SetGeometryDirectly(new Geometry(ogr.wkbMultiPoint));
feat.SetGeometry(null);
feat.GetGeometryRef();
}
// Add features
for (int i = 0; i < 1000000; i++)
{
if ((i % 100000) == 0) System.out.println(i);
Feature feat = new Feature(featureDefn);
feat.SetGeometry(new Geometry(ogr.wkbPoint));
Geometry point = new Geometry(ogr.wkbPoint);
Geometry multipoint = new Geometry(ogr.wkbMultiPoint);
multipoint.AddGeometryDirectly(point);
}
/* Check that the objects are still alive despite their */
/* Java containers and associated native objects */
/* would have been finalized without a trick */
System.out.println(point1.ExportToWkt());
System.out.println(point3.ExportToWkt());
}
}