Class ShapeGISMap.Layer

public void forAllObjects(BiConsumer<org.locationtech.jts.geom.Geometry,org.geotools.api.feature.simple.SimpleFeature> action)

Parameters:

action - the action to be called on each geometry read from the file, after filtering (if any). If shapefile contains geometry collection with a single element inside, it is handled 'unwrapped' (the surrounding collection isn't returned).
Action example (here 'g' stands for Geometry and 'f' for SimpleFeature which may be used to access data from DBF-file records):

 forAllObjects((g, f) -> {
        // Data from DBF file record:
        traceln("DBF attribute: " + f.getAttribute("CNTRY_NAME") + " : " + f.getAttribute("AREA"));
 
        // Shapefile (geometry) data:
        int n = g.getNumGeometries();
        if (n > 1) {
                traceln("geometry list, n: " + n);
        }
        for (int i = 0; i < n; i++) {
                var element = g.getGeometryN(i); // returns 'g' itself, if n == 1
                if (element instanceof org.locationtech.jts.geom.Polygon geometry) {
                        var exteriorRing = geometry.getExteriorRing();
                        traceln("polygon with number of points of exterior ring: " + exteriorRing.getNumPoints());
                        double[] latLonPoints = java.util.stream.Stream.of(exteriorRing.getCoordinates())
                                                .flatMapToDouble(coord -> java.util.stream.DoubleStream.of( coord.y, coord.x ))
                                                .toArray();
                        // Use the following code to access the 'holes', if needed:
                        //for (int j = 0; j < geometry.getNumInteriorRing(); j++) {
                        //      var interior = geometry.getInteriorRingN(j);
                        //}
                } else if (element instanceof org.locationtech.jts.geom.Point geometry) {
                        traceln("point with lat,lon: " + geometry.getY() + ", " + geometry.getX());
                } else if (element instanceof org.locationtech.jts.geom.LineString geometry) {
                        traceln("line with number of points: " + geometry.getNumPoints());
                } else {
                        traceln("unknown geometry: " + element.getClass());
                }
        }
 });
 

public void forAllObjects(BiFunction<org.geotools.api.filter.FilterFactory,org.geotools.api.feature.type.FeatureType,org.geotools.api.filter.Filter> filterProvider,
 BiConsumer<org.locationtech.jts.geom.Geometry,org.geotools.api.feature.simple.SimpleFeature> action)

Parameters:

filterProvider - may be null (to disable filtering), or otherwise a code constructing Filter instance. Two arguments are provided here: FilterFactory (ff in the code below) instance (provided for convenience, but may also be obtained using CommonFactoryFinder.getFilterFactory()), and FeatureType (schema in the code below) - the schema that will apply to features retrieved from the shapefile (may be used e.g. to check the CSR used in the file or other common attributes).
Here are some Filter examples:

• Filter by DBF-contained info:

   forAllObjects(
     (ff, schema) -> ff.equals( ff.property("CNTRY_NAME"), ff.literal("United States") ),
     (g, f) -> { ... });
   

• Filter by bounds:

   forAllObjects(
     (ff, schema) -> ff.bbox(
       schema.getGeometryDescriptor().getLocalName(),
       -88, 41, -87, 42,
       null),
     (g, f) -> { ... });
   

• Combine filters:

   var attributeFilter = // ...
   var boundsFilter = // ...
   var combinedFilter = ff.and(attributeFilter, boundsFilter);
   

action - see forAllObjects(BiConsumer)

public boolean isVisible()

public void setVisible(boolean visible)

public void setLineColor(List<Integer> shapes,
 Color color)

Parameters:

shapes - the list of shape indices, 0-based

color - the new line color

public void setFillColor(List<Integer> shapes,
 Color color)

Parameters:

shapes - the list of shape indices, 0-based

color - the new fill color