Revision 30 org.gvsig.sextante/trunk/org.gvsig.sextante.app/org.gvsig.sextante.app.algorithm/org.gvsig.sextante.app.algorithm.convexhull/src/main/java/org/gvsig/sextante/app/algorithm/convexhull/ConvexHullOperation.java

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ConvexHullOperation.java
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package org.gvsig.sextante.app.algorithm.convexhull;
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import org.gvsig.fmap.geom.GeometryLocator;


  		




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import org.gvsig.fmap.geom.exception.CreateGeometryException;


  		




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import org.gvsig.fmap.geom.util.Converter;


  		




  
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import org.gvsig.fmap.geom.GeometryManager;


  		




  
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import org.gvsig.fmap.geom.operation.GeometryOperationContext;


  		




  
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import org.gvsig.fmap.geom.operation.GeometryOperationException;


  		




  
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import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;


  		




  
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import org.gvsig.fmap.geom.operation.tojts.ToJTS;


  		




  
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import org.gvsig.fmap.geom.operation.fromjts.FromJTS;


  		




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import com.vividsolutions.jts.geom.Geometry;


  		




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import com.vividsolutions.jts.geom.GeometryCollection;


  		




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import com.vividsolutions.jts.geom.GeometryFactory;


  		




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import es.unex.sextante.core.Sextante;


  		




  
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/**


  		




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 * Convex Hull operation


  		




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 * @author Nacho Brodin (nachobrodin@gmail.com)


  		




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 */


  		




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public class ConvexHullOperation {


  		




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	public static final String  NAME     = "ConvexHull";


  		




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	public static final int     CODE     = GeometryLocator.getGeometryManager().getGeometryOperationCode(NAME);


  		




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	Geometry                    geometry = null;


  		




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	GeometryFactory             geomFact = null;


  		




  
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	public static final String  NAME             = "ConvexHull";


  		




  
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	public static final int     CODE             = GeometryLocator.getGeometryManager().getGeometryOperationCode(NAME);


  		




  
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	Geometry                    geometry         = null;


  		




  
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	GeometryFactory             geomFact         = null;


  		




  
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	private GeometryManager     geometryManager  = null;


  		




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	public ConvexHullOperation() {


  		




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		geometry = null;


  		




  
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		geometryManager = GeometryLocator.getGeometryManager();


  		




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	}


  		




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	/**


  		




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	 * @return


  		




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	 */


  		




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	public org.gvsig.fmap.geom.Geometry getGeometry() {


  		




  
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		if(geometry == null)


  		




  
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			return null;


  		




  
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		GeometryOperationContext ctx = new GeometryOperationContext();


  		




  
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		ctx.setAttribute(FromJTS.PARAM, geometry);


  		




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		try {


  		




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			return Converter.jtsToGeometry(geometry);


  		




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		} catch (CreateGeometryException e) {


  		




  
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			return (org.gvsig.fmap.geom.Geometry)geometryManager.invokeOperation(FromJTS.NAME, ctx);


  		




  
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		} catch (GeometryOperationNotSupportedException e) {


  		




  
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			Sextante.addErrorToLog(e);


  		




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			return null;


  		




  
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		} catch (GeometryOperationException e) {


  		




  
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			Sextante.addErrorToLog(e);


  		




  
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			return null;


  		




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		}


  		




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	}


  		




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  ......




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	public org.gvsig.fmap.geom.Geometry invoke(org.gvsig.fmap.geom.Geometry g) {


  		




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		if(g == null)


  		




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			return null;


  		




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		com.vividsolutions.jts.geom.Geometry actualGeometry = Converter.geometryToJts(g);


  		




  
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		com.vividsolutions.jts.geom.Geometry actualGeometry = null;


  		




  
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		try {


  		




  
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			actualGeometry = (Geometry)g.invokeOperation(ToJTS.CODE, null);


  		




  
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		} catch (GeometryOperationNotSupportedException e1) {


  		




  
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			Sextante.addErrorToLog(e1);


  		




  
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		} catch (GeometryOperationException e1) {


  		




  
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			Sextante.addErrorToLog(e1);


  		




  
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		}


  		




  
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		if(geometry == null)


  		




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			geometry = actualGeometry;


  		




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		else {


  		












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