Package com.luciad.models.features

Class ObservableFeatureUtil

java.lang.Object

com.luciad.models.features.ObservableFeatureUtil

public final class ObservableFeatureUtil
extends Object

This class provides utility methods for Observable instance for Feature.

Method Summary

Modifier and Type	Method	Description
static Observable<@Nullable Geometry>	deriveGeometry(Observable<@NotNull Feature> observableFeature, IFeatureGeometryProvider geometryProvider)	Derives an Observable Geometry from the given observable feature.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

deriveGeometry

@NotNull
public static Observable<@Nullable Geometry> deriveGeometry(@NotNull
 Observable<@NotNull Feature> observableFeature,
 @NotNull
 IFeatureGeometryProvider geometryProvider)
                                                     throws NullPointerException

Derives an Observable Geometry from the given observable feature.

This observable geometry will be updated when the given observable feature is updated.

Notes:

• When this method can not derive a geometry instance using the given IFeatureGeometryProvider, an Observable instance will be created with a null value.
• A null value can also be set on an existing Observable Geometry instance after Observable Feature changes, and no geometry instance can be derived.
• Observable#setValue will throw an exception for derived instances.

Parameters:

observableFeature - an observable feature from which to derive a geometry. Cannot be null.

geometryProvider - the geometry provider used to extract a geometry from the feature. This provider is used initially, and when the given ObservableFeature changes. Cannot be null.

Returns:

a derived Observable

Throws:

NullPointerException - when passing null values.