public class PreGeneralizedFeatureCollection extends Object implements SimpleFeatureCollection
Implementation of FeatureCollection for PreGeneralizedSimpleFeature
This collection is read only, modifying methods result in UnsupportedOperationException
| Modifier and Type | Field and Description |
|---|---|
protected SimpleFeatureCollection |
backendCollection |
protected String |
backendGeomPropertyName |
protected SimpleFeatureType |
featureType |
protected String |
geomPropertyName |
protected int[] |
indexMapping |
| Constructor and Description |
|---|
PreGeneralizedFeatureCollection(SimpleFeatureCollection backendCollection,
SimpleFeatureType featureType,
int[] indexMapping,
String geomPropertyName,
String backendGeomPropertyName) |
| Modifier and Type | Method and Description |
|---|---|
void |
accepts(FeatureVisitor visitor,
ProgressListener progress)
Visit the contents of a feature collection.
|
boolean |
contains(Object feature) |
boolean |
containsAll(Collection coll) |
SimpleFeatureIterator |
features()
Obtain a SimpleFeatureIterator of the Features within this SimpleFeatureCollection.
|
ReferencedEnvelope |
getBounds()
Get the total bounds of this collection which is calculated by doing a union of the bounds of
each feature inside of it
|
String |
getID()
ID used when serializing to GML
|
SimpleFeatureType |
getSchema()
The schema for the child feature members of this collection.
|
boolean |
isEmpty()
Returns true if this feature collection contains no features.
|
int |
size()
Please note this operation may be expensive when working with remote content.
|
SimpleFeatureCollection |
sort(SortBy sortBy)
Obtained sorted contents.
|
SimpleFeatureCollection |
subCollection(Filter filter)
SimpleFeatureCollection "view" indicated by provided filter.
|
Object[] |
toArray() |
Object[] |
toArray(Object[] arg0) |
protected SimpleFeatureCollection backendCollection
protected SimpleFeatureType featureType
protected String geomPropertyName
protected String backendGeomPropertyName
protected int[] indexMapping
public PreGeneralizedFeatureCollection(SimpleFeatureCollection backendCollection, SimpleFeatureType featureType, int[] indexMapping, String geomPropertyName, String backendGeomPropertyName)
public void accepts(FeatureVisitor visitor, ProgressListener progress) throws IOException
FeatureCollectionThe order of traversal is dependent on the FeatureCollection implementation; some collections are able to make efficient use of an internal index in order to quickly visit features located in the same region.
accepts in interface FeatureCollection<SimpleFeatureType,SimpleFeature>visitor - Closure applied to each feature in turn.progress - Used to report progress, may be used to interrupt the operationIOExceptionpublic boolean contains(Object feature)
contains in interface FeatureCollection<SimpleFeatureType,SimpleFeature>Collection.contains(Object)public boolean containsAll(Collection coll)
containsAll in interface FeatureCollection<SimpleFeatureType,SimpleFeature>Collection.containsAll(Collection)public SimpleFeatureIterator features()
SimpleFeatureCollectionThe implementation of FeatureIterator must adhere to the rules of fail-fast concurrent
modification. In addition (to allow for resource backed collections) the
SimpleFeatureIterator.close() method must be called.
Example use:
SimpleFeatureIterator iterator=collection.features();
try {
while( iterator.hasNext() ){
SimpleFeature feature = iterator.next();
System.out.println( feature.getID() );
}
}
finally {
iterator.close();
}
features in interface SimpleFeatureCollectionfeatures in interface FeatureCollection<SimpleFeatureType,SimpleFeature>public ReferencedEnvelope getBounds()
FeatureCollectiongetBounds in interface FeatureCollection<SimpleFeatureType,SimpleFeature>public String getID()
FeatureCollectiongetID in interface FeatureCollection<SimpleFeatureType,SimpleFeature>public SimpleFeatureType getSchema()
FeatureCollectionRepresents the most general FeatureType in common to all the features in this collection.
getSchema in interface FeatureCollection<SimpleFeatureType,SimpleFeature>public boolean isEmpty()
FeatureCollectionisEmpty in interface FeatureCollection<SimpleFeatureType,SimpleFeature>public int size()
FeatureCollectionsize in interface FeatureCollection<SimpleFeatureType,SimpleFeature>Collection.size()public SimpleFeatureCollection sort(SortBy sortBy)
FeatureCollectionThis method may not be supported by all implementations, consider the use of FeatureSource.features( Query ).
sort in interface SimpleFeatureCollectionsort in interface FeatureCollection<SimpleFeatureType,SimpleFeature>sortBy - Sort orderpublic SimpleFeatureCollection subCollection(Filter filter)
FeatureCollectionThe contents of the returned SimpleFeatureCollection are determined by applying the provider Filter to the entire contents of this FeatureCollection. The result is "live" and modifications will be shared.
This method is used cut down on the number of filter based methods required for a useful SimpleFeatureCollection construct. The FeatureCollections returned really should be considered as a temporary "view" used to control the range of a removeAll, or modify operation.
Example Use:
collection.subCollection( filter ).clear();
The results of subCollection:
subCollection in interface SimpleFeatureCollectionsubCollection in interface FeatureCollection<SimpleFeatureType,SimpleFeature>FeatureListpublic Object[] toArray()
toArray in interface FeatureCollection<SimpleFeatureType,SimpleFeature>Collection.toArray()public Object[] toArray(Object[] arg0)
toArray in interface FeatureCollection<SimpleFeatureType,SimpleFeature>Collection.toArray(Object[])Copyright © 1996–2019 Geotools. All rights reserved.