Examples of SimpleFeature

org.geomajas.layer.hibernate.simple.pojo.SimpleFeature

Hibernate test feature. @author Pieter De Graef @author Jan De Moerloose

org.opengis.feature.simple.SimpleFeature

An instance of {@link SimpleFeatureType} composed of fixed list values in a known order.

The definition of a "simple feature" can be summed up as the following:

made up of only non-complex attributes, no associations
attributes are of multiplicity 1
attributes are ordered
attribute names are unqualified (namespaceURI == null)

Attribute Access

The order and multiplicity restrictions on simple feature make attribute values accessible via an index. For example consider the following shapefile entry:

 | GEOMETRY   | INT | STRING | | POINT(0 0) |  0  | "zero" |

Accessing attributes via index would look like:

 SimpleFeature feature = ...; Geometry g = (Geometry) feature.getAttribute( 0 ); Integer i = (Integer) feature.getAttribute( 1 ); String s = (String) feature.getAttribute( 2 );

One could also access by name:

 SimpleFeature feature = ...; Geometry g = (Geometry) feature.getAttribute( "GEOMETRY" ); Integer i = (Integer) feature.getAttribute( "INT" ); String s = (String) feature.getAttribute( "STRING" );

Note: Attribute access via getAttribute() methods returns attribute values, and not the attributes themselves. For access to the actual attributes {@link ComplexAttribute#getProperty(String)} can be used.

@see SimpleFeatureType @author Jody Garnett (LISAsoft) @author Justin Deoliveira (The Open Planning Project) @since 2.5 @version 8.0 @source $URL$


    private void goToFeature() throws IOException {
        if (featureList == null) {
            initLayer();
        }
        SimpleFeature currentFeature = featureList.get(index);


        SimpleFeatureType featureType = currentFeature.getFeatureType();
        List<AttributeDescriptor> attributeDescriptors = featureType.getAttributeDescriptors();
        List<String> attributeNames = new ArrayList<String>();
        for( AttributeDescriptor attributeDescriptor : attributeDescriptors ) {
            String name = attributeDescriptor.getLocalName();
            attributeNames.add(name);
        }
        final StringBuilder infoSb = new StringBuilder();
        for( String name : attributeNames ) {
            Object attribute = currentFeature.getAttribute(name);
            if (attribute != null) {
                infoSb.append(name).append(" = ").append(attribute.toString()).append("\n");
            }
        }
        final StringBuilder numSb = new StringBuilder();
        numSb.append("  (");
        numSb.append(index + 1);
        numSb.append("/");
        numSb.append(featureList.size());
        numSb.append(")");
        index++;
        if (index == featureList.size()) {
            index = 0;
        }


        Display.getDefault().asyncExec(new Runnable(){
            public void run() {
                currentFeatureInfo.setText(infoSb.toString());
                featureNumLabel.setText(numSb.toString());
            }
        });


        Geometry geometry = (Geometry) currentFeature.getDefaultGeometry();
        Envelope envelope = geometry.getEnvelopeInternal();
        envelope.expandBy(zoomBuffer);
        ReferencedEnvelope ref = new ReferencedEnvelope(envelope, crs);
        try {
            ref = ref.transform(activeMap.getViewportModel().getCRS(), true);

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Examples of SimpleFeature

Attribute Access

Examples of org.opengis.feature.simple.SimpleFeature