Revision 10626 trunk/extensions/extGeoProcessing/src/com/iver/cit/gvsig/geoprocess/core/fmap/AbstractGeoprocessFeatureVisitor.java
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* |
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* $Id$ |
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* $Log$ |
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* Revision 1.1 2006-07-21 09:08:15 azabala |
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* Revision 1.2 2007-03-06 16:47:58 caballero |
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* Exceptions |
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* |
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* Revision 1.1 2006/07/21 09:08:15 azabala |
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* first version in cvs |
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* |
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* |
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*/ |
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package com.iver.cit.gvsig.geoprocess.core.fmap; |
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import com.iver.cit.gvsig.exceptions.visitors.ProcessVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.StartVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.VisitorException; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.edition.EditionException; |
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import com.iver.cit.gvsig.fmap.layers.FLayer; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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/** |
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* Abstract base class to all feature visitor created |
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* processes visited features. |
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*/ |
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FeatureProcessor featureProcessor; |
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/** |
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* Constructor. |
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* It receives a FeatureProcessor to process visited features |
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public AbstractGeoprocessFeatureVisitor(FeatureProcessor processor){
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this.featureProcessor = processor; |
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} |
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public abstract void visit(IGeometry g, int index) throws VisitException; |
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public abstract void visit(IGeometry g, int index) throws VisitorException, ProcessVisitorException; |
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public abstract String getProcessDescription(); |
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/** |
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* finishes visitation by closing result layer writing. |
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*/ |
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public void stop(FLayer layer) {
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public void stop(FLayer layer) throws VisitorException {
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featureProcessor.finish(); |
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} |
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/** |
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* to start the visit process, prepares result layer. |
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*/ |
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public boolean start(FLayer layer) {
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if (layer instanceof AlphanumericData &&
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public boolean start(FLayer layer) throws StartVisitorException {
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if (layer instanceof AlphanumericData && |
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layer instanceof VectorialData) {
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try {
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this.featureProcessor.start(); |
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}catch (EditionException e) {
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return false; |
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} |
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return true; |
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} |
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return false; |
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} |
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} |
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