Examples of org.opengis.feature.simple.SimpleFeature

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 $URL$

    filter = filterService.createCompareFilter("POP_OTHER", ">", "1000000");
  }


  @Test
  public void read() throws Exception {
    SimpleFeature f = (SimpleFeature) layer.read(LAYER_NAME + ".2"); // id always starts with layer id
    Assert.assertNotNull(f);
    Assert.assertEquals("Vatican City", f.getAttribute("NAME"));
  }

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  }


  @Test
  public void delete() {
    try {
      SimpleFeature f = (SimpleFeature) layer.read(LAYER_NAME + ".3");
      Assert.assertNotNull(f);
      layer.delete(LAYER_NAME + ".3");
      Assert.assertTrue(true);
    } catch (Exception e) {
      Assert.assertTrue(false);

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  @Test
  public void testFIDFilter() throws Exception {
    Filter filter = filterCreator.createFidFilter(new String[] { "filtertest.1" });
    Iterator<?> it = layer.getElements(filter, 0, 0);
    SimpleFeature f = (SimpleFeature) it.next();
    Assert.assertEquals("centraal", f.getAttribute("textAttr"));
  }

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  @Test
  public void fidFilter() throws LayerException {
    Filter filter = filterService.createFidFilter(new String[] { LAYER_NAME + ".1", LAYER_NAME + ".2" });
    Iterator<?> it = layer.getElements(filter, 0, 0);
    SimpleFeature f = (SimpleFeature) it.next();
    f = (SimpleFeature) it.next();
    Assert.assertEquals("inside", f.getAttribute(PARAM_TEXT_ATTR));
  }

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    Assert.assertEquals("inside", f.getAttribute(PARAM_TEXT_ATTR));
  }


  @Test
  public void containsFilter() throws LayerException {
    SimpleFeature feature = (SimpleFeature) layer.read(LAYER_NAME+".1");
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Filter filter = filterService.createContainsFilter(geom, PARAM_GEOMETRY_ATTR);
    Iterator<?> it = layer.getElements(filter, 0, 0);


    int t = 0;
    while (it.hasNext()) {

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    Assert.assertEquals(3, t);
  }


  @Test
  public void withinFilter() throws LayerException {
    SimpleFeature feature = (SimpleFeature) layer.read(LAYER_NAME+".7");
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Filter filter = filterService.createWithinFilter(geom, PARAM_GEOMETRY_ATTR);
    Iterator<?> it = layer.getElements(filter, 0, 0);


    int t = 0;
    while (it.hasNext()) {

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    Assert.assertEquals(4, t);
  }


  @Test
  public void intersectsFilter() throws LayerException {
    SimpleFeature feature = (SimpleFeature) layer.read(LAYER_NAME+".7");
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Filter filter = filterService.createIntersectsFilter(geom, PARAM_GEOMETRY_ATTR);
    Iterator<?> it = layer.getElements(filter, 0, 0);


    int t = 0;
    while (it.hasNext()) {

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    Assert.assertEquals(6, t);
  }


  @Test
  public void touchesFilter() throws LayerException {
    SimpleFeature feature = (SimpleFeature) layer.read(LAYER_NAME+".7");
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Filter filter = filterService.createTouchesFilter(geom, PARAM_GEOMETRY_ATTR);
    Iterator<?> it = layer.getElements(filter, 0, 0);


    int t = 0;
    while (it.hasNext()) {

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    Assert.assertEquals(3, t);
  }


  @Test
  public void overlapsFilter() throws LayerException {
    SimpleFeature feature = (SimpleFeature) layer.read(LAYER_NAME+".2");
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Filter filter = filterService.createOverlapsFilter(geom, PARAM_GEOMETRY_ATTR);
    Iterator<?> it = layer.getElements(filter, 0, 0);


    int t = 0;
    while (it.hasNext()) {

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    filter = filterCreator.createCompareFilter(ATTRIBUTE_POPULATION, ">", "1000000");
  }


  @Test
  public void testRead() throws Exception {
    SimpleFeature f = (SimpleFeature) layer.read(LAYER_NAME + ".2"); // id always starts with layer id
    Assert.assertEquals("Vatican City", f.getAttribute(ATTRIBUTE_NAME));
    Assert.assertEquals(562430, f.getAttribute(ATTRIBUTE_POPULATION));
  }

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Examples of org.opengis.feature.simple.SimpleFeature

Attribute Access

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