Package org.geotools.feature.collection
Class SubFeatureCollection
Object
BaseFeatureCollection<SimpleFeatureType,SimpleFeature>
BaseSimpleFeatureCollection
SubFeatureCollection
- All Implemented Interfaces:
SimpleFeatureCollection
,FeatureCollection<SimpleFeatureType,
SimpleFeature>
- Direct Known Subclasses:
SubFeatureList
Reasonable default implementation for subCollection making use of parent
SimpleFeatureCollection.features()
and provided Filter.
This is only a reasonable implementation and is not optimal. It is recommended that implementors construct a new
Query
and use SimpleFeatureSource.getFeatures(Query)
.
- Author:
- Jody Garnett, Refractions Research, Inc.
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected SimpleFeatureCollection
Original Collectionprotected FilterFactory
protected Filter
FilterFields inherited from class BaseFeatureCollection
id, schema
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Constructor Summary
ConstructorsConstructorDescriptionSubFeatureCollection
(SimpleFeatureCollection collection) SubFeatureCollection
(SimpleFeatureCollection collection, Filter subfilter) -
Method Summary
Modifier and TypeMethodDescriptionprotected Filter
Override to implement subsettingfeatures()
Subclasses required to implement this method to traverse FeatureCollection contents.protected Filter
filter()
Generate filter to use for content, makes use ofcreateFilter()
if needed.Calculates the bounds of the features without caching.getID()
ID used when serializing to GMLint
size()
Returns the number of elements in this collection.Obtained sorted contents, only implemented for SimpleFeature at present.subCollection
(Filter filter) Convenience implementation that just wraps this collection into aFilteringFeatureCollection
.Methods inherited from class BaseFeatureCollection
accepts, contains, containsAll, getSchema, isEmpty, toArray, toArray
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface FeatureCollection
accepts, contains, containsAll, getSchema, isEmpty, toArray, toArray
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Field Details
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filter
Filter -
collection
Original Collection -
ff
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Constructor Details
-
SubFeatureCollection
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SubFeatureCollection
- Parameters:
collection
- Collection or AbstractFeatureCollection
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Method Details
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features
Description copied from class:BaseSimpleFeatureCollection
Subclasses required to implement this method to traverse FeatureCollection contents.Note that
FeatureIterator.close()
is available to clean up after any resource use required during traversal.- Specified by:
features
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Specified by:
features
in interfaceSimpleFeatureCollection
- Specified by:
features
in classBaseSimpleFeatureCollection
- Returns:
- A FeatureIterator.
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size
public int size()Description copied from class:BaseFeatureCollection
Returns the number of elements in this collection.- Specified by:
size
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Overrides:
size
in classBaseFeatureCollection<SimpleFeatureType,
SimpleFeature> - Returns:
- Number of items, or Interger.MAX_VALUE
- See Also:
-
filter
Generate filter to use for content, makes use ofcreateFilter()
if needed.- Returns:
- Filter to use for content
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createFilter
Override to implement subsetting -
subCollection
Description copied from class:BaseFeatureCollection
Convenience implementation that just wraps this collection into aFilteringFeatureCollection
. Subclasses might want to override this in case the filter can be cascaded to their data sources.- Specified by:
subCollection
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Specified by:
subCollection
in interfaceSimpleFeatureCollection
- Overrides:
subCollection
in classBaseSimpleFeatureCollection
- Returns:
- SimpleFeatureCollection identified as subset.
- See Also:
-
FeatureList
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sort
Description copied from class:BaseFeatureCollection
Obtained sorted contents, only implemented for SimpleFeature at present.This method only supports SimpleFeature at present, consider use of FeatureSource.features( Query ).
- Specified by:
sort
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Specified by:
sort
in interfaceSimpleFeatureCollection
- Overrides:
sort
in classBaseSimpleFeatureCollection
- Parameters:
order
- Sort order- Returns:
- FeatureCollection sorted in the indicated order
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getID
Description copied from interface:FeatureCollection
ID used when serializing to GML- Specified by:
getID
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Overrides:
getID
in classBaseFeatureCollection<SimpleFeatureType,
SimpleFeature>
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getBounds
Calculates the bounds of the features without caching.- Specified by:
getBounds
in interfaceFeatureCollection<SimpleFeatureType,
SimpleFeature> - Overrides:
getBounds
in classBaseFeatureCollection<SimpleFeatureType,
SimpleFeature> - Returns:
- An Envelope containing the total bounds of this collection.
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