Examples of FeatureVisitor

org.opengis.feature.FeatureVisitor
FeatureVisitor interface to allow for container optimised traversal.
The iterator construct from the Collections api is well understood and loved, but breaks down for working with large GIS data volumes. By using a visitor we allow the implementor of a Feature Collection to make use of additional resources (such as multiple processors or tiled data) concurrently.
This interface is most often used for calculations and data transformations and an implementations may intercept known visitors (such as "bounds" or reprojection) and engage an alternate work flow.
@author Cory Horner (Refractions Research, Inc) @source $URL$

Examples of org.opengis.feature.FeatureVisitor

                IONIC_STATISTICAL_UNIT.DATA);


        int nof = parser.getNumberOfFeatures();
        assertEquals(-1, nof);


        FeatureVisitor assertor = new FeatureAssertor(featureType);
        testParseGetFeatures(featureName, featureType, parser, assertor, 2);
    }

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Examples of org.opengis.feature.FeatureVisitor

        public List<Object[]> doInBackground() {
            List<Object[]> list = new ArrayList<Object[]>();
            
            final NullProgressListener listener = new NullProgressListener();
            try {
                features.accepts( new FeatureVisitor() {                
                    public void visit(Feature feature) {
                        SimpleFeature simple = (SimpleFeature) feature;
                        Object[] values = simple.getAttributes().toArray();
                        ArrayList<Object> row = new ArrayList<Object>( Arrays.asList( values ));
                        row.add(0, simple.getID() );

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Examples of org.opengis.feature.FeatureVisitor

    public void testMultiLine() throws Exception {
        SimpleFeatureSource road = storeMultiline.getFeatureSource( "multiline" );
        FeatureId fid1 = ff.featureId("fid1");
        Filter select = ff.id( Collections.singleton(fid1));
        SimpleFeatureCollection featureCollection = road.getFeatures( select );
        featureCollection.accepts(new FeatureVisitor() {
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                String name = (String) feature.getAttribute("name");
                assertEquals( "jody \ngarnett", name );
            }

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Examples of org.opengis.feature.FeatureVisitor

        SimpleFeatureSource table = storeTable.getFeatureSource( "table" );
        //GenericEntity.f004=description-f004|name-f004
        FeatureId fid1 = ff.featureId("GenericEntity.f004");
        Filter select = ff.id( Collections.singleton(fid1));
        SimpleFeatureCollection featureCollection = table.getFeatures( select );
        featureCollection.accepts(new FeatureVisitor() {
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                String name = (String) feature.getAttribute("name");
                assertEquals( "name-f004", name );
            }
        },null);
        //GenericEntity.f003=description-f003|<null>
        fid1 = ff.featureId("GenericEntity.f003");
        select = ff.id( Collections.singleton(fid1));
        featureCollection = table.getFeatures( select );
        featureCollection.accepts(new FeatureVisitor() {
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                String name = (String) feature.getAttribute("name");
                System.out.println( name );
                assertNull( "represent null", name );
            }
        },null);
        //GenericEntity.f007=description-f007|
        fid1 = ff.featureId("GenericEntity.f007");
        select = ff.id( Collections.singleton(fid1));
        featureCollection = table.getFeatures( select );
        featureCollection.accepts(new FeatureVisitor() {
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                String name = (String) feature.getAttribute("name");
                assertEquals( "represent empty string", "", name );
            }
        },null);
        //"  GenericEntity.f009=description-f009| "
        fid1 = ff.featureId("GenericEntity.f009");
        select = ff.id( Collections.singleton(fid1));
        featureCollection = table.getFeatures( select );
        featureCollection.accepts(new FeatureVisitor() {
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                String name = (String) feature.getAttribute("name");
                assertEquals( "represent empty string", " ", name );
            }

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Examples of org.opengis.feature.FeatureVisitor

        try {
            while( iterator.hasNext()) {
              SimpleFeature feature = (SimpleFeature) iterator.next();
    
                for (int i = 0; i < visitors.length; i++) {
                    FeatureVisitor visitor = visitors[i];
                    visitor.visit(feature);
                }
            }
        } finally {
            iterator.close();
        }

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Examples of org.opengis.feature.FeatureVisitor

    @Test
    public void testWkbSidecars() throws Exception {
        // create wkb sidecar files
        ShapefileDataStore ds = new ShapefileDataStore(DataUtilities.fileToURL(new File(
                footprintsSource, "footprints.shp")));
        ds.getFeatureSource().getFeatures().accepts(new FeatureVisitor() {


            @Override
            public void visit(Feature feature) {
                try {
                    SimpleFeature sf = (SimpleFeature) feature;

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Examples of org.opengis.feature.FeatureVisitor

    @Test
    public void testWktSidecars() throws Exception {
        // create wkb sidecar files
        ShapefileDataStore ds = new ShapefileDataStore(DataUtilities.fileToURL(new File(
                footprintsSource, "footprints.shp")));
        ds.getFeatureSource().getFeatures().accepts(new FeatureVisitor() {


            @Override
            public void visit(Feature feature) {
                try {
                    SimpleFeature sf = (SimpleFeature) feature;

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Examples of org.opengis.feature.FeatureVisitor

    @Test
    public void testShapefileSidecars() throws Exception {
        // create wkb sidecar files
        ShapefileDataStore ds = new ShapefileDataStore(DataUtilities.fileToURL(new File(
                footprintsSource, "footprints.shp")));
        ds.getFeatureSource().getFeatures().accepts(new FeatureVisitor() {


            @Override
            public void visit(Feature feature) {
                try {
                    SimpleFeature sf = (SimpleFeature) feature;

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Examples of org.opengis.feature.FeatureVisitor

        assertEquals("stored", list.size(), trip.getCount(Query.ALL));
        
        final Map<String,SimpleFeature> cache = new HashMap<String,SimpleFeature>();
        SimpleFeatureCollection readFeatures = trip.getFeatures();
        
        FeatureVisitor cacheResults = new FeatureVisitor() {
            @Override
            public void visit(Feature f) {
                SimpleFeature feature = (SimpleFeature) f;
                cache.put( feature.getID(), feature );
            }

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Examples of org.opengis.feature.FeatureVisitor

            String[] dynamicProperties = getDynamicProperties(dynamicRules);
            query.setPropertyNames(dynamicProperties);
            
            // visit all features and evaluate buffer size
            final DynamicBufferEstimator dbe = new DynamicBufferEstimator(); 
            fs.getFeatures(query).accepts(new FeatureVisitor() {
                
                @Override
                public void visit(Feature feature) {
                    dbe.setFeature(feature);
                    for (Rule rule : dynamicRules) {

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