Examples of org.opengis.feature.Property

org.opengis.feature.Property
he value property.setValue( "foo" ); //get the value String value = (String) property.getValue();

Every property has a type. This {@link PropertyType} defines informationabout the property. This includes which java class the value of the property is an instance of, any restrictions on the value, etc... The type is available via the {@link #getType()} method.
```
 Property property = ...; //get the type PropertyType type = property.getType(); //get the class of the value Class<String> valueClass = (Class<String>)type.getBinding(); 
```
A property can often be part of another entity such as a {@link Feature} or {@link ComplexAttribute}. When this is the case, the relationship between the property and its "container" is described by a {@link PropertyDescriptor}. The descriptor of a property defines things like nilablility, multiplicity, etc... See the javadoc of {@link PropertyDescriptor} for more details. Thedescriptor is available via the {@link #getDescriptor()} method.
```
 Property property = ...; //get the descriptor PropertyDescriptor descriptor = property.getDescriptor()l //is the value allowed to be null? descriptor.isNillable(); //how many instances of this property are allowed? descriptor.getMaxOccurs(); 
```
@author Jody Garnett (Refractions Research) @author Justin Deoliveira (The Open Planning Project) @source $URL$

            Name geometryAttributeName = builder.getFeatureType().getGeometryDescriptor().getName();
            builder.set(geometryAttributeName, next.getDefaultGeometryProperty().getValue());
            for (AttributeDescriptor attribute : builder.getFeatureType().getAttributeDescriptors()) {
                Name name = attribute.getName();
                if (!name.equals(geometryAttributeName)) {
                    Property property = next.getProperty(name);
                    if (property == null) {
                        throw new GeoToolsOpException(
                                GeoToolsOpException.StatusCode.INCOMPATIBLE_FEATURE_TYPE);
                    }
                    builder.set(name, next.getProperty(name).getValue());

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    public Collection<Property> getProperties(Name name) {
        return getProperties(name.getLocalPart());
    }


    public Collection<Property> getProperties(String name) {
        Property p = createProperty(name);
        if (p == null)
            return Collections.emptyList();
        else
            return Collections.singletonList(p);
    }

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        SimpleFeatureCollection features = road.getFeatures();
        assertEquals(4, features.size());


        SimpleFeature feature;
        Geometry geom;
        Property prop;
        GeometryType geomType;
        SimpleFeatureIterator iterator = features.features();
        while (iterator.hasNext()) {
            feature = iterator.next();
            prop = feature.getProperty("geom");
            assertTrue(prop.getType() instanceof GeometryType);
            geomType = (GeometryType) prop.getType();


            Object val = prop.getValue();
            assertTrue(val != null && val instanceof Geometry);
            geom = (Geometry) val;


            Object userData = geom.getUserData();
            assertTrue(userData != null && userData instanceof CoordinateReferenceSystem);

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        FeatureIterator<Feature> features = exCollection.features();
        try {
            while (features.hasNext()) {
                Feature feature = features.next();
                String fId = feature.getIdentifier().getID();
                Property attribute = feature.getProperty("someAttribute");
                // <OCQL>Categorize(getID(), 'missing value', 2, 'a valid value')</OCQL>
                assertEquals(attribute.getValue(), VALUE_MAP.get(fId));
            }
        }
        finally {
            features.close();
        }

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     * @param value
     *            Value for the simple content.
     * @return The attribute with simple content type.
     */
    private Attribute setSimpleContentValue(Attribute attribute, Object value) {
        Property simpleContent = null;
        if (attribute instanceof ComplexAttribute) {
          simpleContent = ((ComplexAttribute)attribute).getProperty(ComplexFeatureConstants.SIMPLE_CONTENT);
        }
        if (simpleContent == null) {
            Collection<Property> contents = new ArrayList<Property>();
          simpleContent = buildSimpleContent(attribute.getType(), value);
            contents.add(simpleContent);
            ArrayList<Attribute> nestedAttContents = new ArrayList<Attribute>();
            Attribute nestedAtt = new ComplexAttributeImpl(contents, attribute.getDescriptor(),
                    attribute.getIdentifier());
            nestedAttContents.add(nestedAtt);
            attribute.setValue(nestedAttContents);
            
            return nestedAtt;
        } else {
          PropertyType simpleContentType = getSimpleContentType((AttributeType) simpleContent.getType());
            Object convertedValue = FF.literal(value).evaluate(value,
                    simpleContentType.getBinding());
          simpleContent.setValue(convertedValue);
          return attribute;
        }        
    }

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        Object convertedValue = null;
        Map <Object, Object> simpleContentProperties = null;
        if (isFeatureChainedSimpleContent(descriptor, value)) {
            List<Property> nestedPropList = getSimpleContentList(value);
            if (!nestedPropList.isEmpty()) {
              Property nestedProp = nestedPropList.iterator().next();
              if (Types.isGeometryType(descriptor.getType())
                  || nestedProp.getName().equals(descriptor.getName())) {
                convertedValue = nestedProp.getValue();
              } else {
                    convertedValue = nestedPropList;
              }
                simpleContentProperties = nestedProp.getUserData();
            }
        } else {
            // adapt value to context
            convertedValue = convertValue(descriptor, value);   
        }

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    protected void cleanEmptyElements(Feature target) throws DataSourceException {
        try {
            ArrayList values = new ArrayList<Property>();
            for (Iterator i = target.getValue().iterator(); i.hasNext();) {
                Property p = (Property) i.next();
                if (hasChild(p) || p.getDescriptor().getMinOccurs() > 0 || getEncodeIfEmpty(p)) {
                    values.add(p);
                }
            }
            target.setValue(values);
        } catch (DataSourceException e) {

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     * @param xpath
     *            The xPath matching the attribute
     * @return The first matching attribute
     */
    private Property getProperty(Attribute root, StepList xpath) {
        Property property = root;


        final StepList steps = new StepList(xpath);


        Iterator<Step> stepsIterator = steps.iterator();

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        /**
         * We can handle *one* case and one case only 
         */
        public boolean canHandle(Object object, String xpath, Class target) {
            if( object instanceof Property ){
                Property property = (Property) object;
                final Name name = property.getName();
                if( name != null ){
                    return name.getLocalPart().equals( xpath );
                } else {
                    // A property with no name? this is probably a place holder
                    // or Null Object (such as TransactionStateDiff.NULL).

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   * @return
   */
  private Object unpack(Object value) {
      
      if (value instanceof org.opengis.feature.ComplexAttribute){
                Property simpleContent = ((org.opengis.feature.ComplexAttribute)value).getProperty(new NameImpl("simpleContent"));
                if (simpleContent == null) {
                    return null;
                } else {
                    return simpleContent.getValue();
                }
            }
            
            if(value instanceof org.opengis.feature.Attribute){
                return ((org.opengis.feature.Attribute)value).getValue();

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