Class DecoratingSimpleFeatureCollection
- Object
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- DecoratingSimpleFeatureCollection
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- All Implemented Interfaces:
SimpleFeatureCollection
,FeatureCollection<SimpleFeatureType,SimpleFeature>
- Direct Known Subclasses:
ClippedFeatureCollection
,ClippingFeatureCollection
,CollectionFeatureSource.SubCollection
,FilteringSimpleFeatureCollection
,MaxSimpleFeatureCollection
,ReprojectingFeatureCollection
,ReTypingFeatureCollection
,SortedSimpleFeatureCollection
public class DecoratingSimpleFeatureCollection extends Object implements SimpleFeatureCollection
A FeatureCollection which completely delegates to another FeatureCollection.This class should be subclasses by classes which must somehow decorate another SimpleFeatureCollection and override the relevant methods.
- Since:
- 2.5
- Author:
- Justin Deoliveira, The Open Planning Project, jdeolive@openplans.org
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Field Summary
Fields Modifier and Type Field Description protected SimpleFeatureCollection
delegate
the delegate
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Constructor Summary
Constructors Modifier Constructor Description protected
DecoratingSimpleFeatureCollection(SimpleFeatureCollection delegate)
protected
DecoratingSimpleFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accepts(FeatureVisitor visitor, ProgressListener progress)
Visit the contents of a feature collection.protected boolean
canDelegate(FeatureVisitor visitor)
Methods for subclass to override in order to determine if the supplied visitor can be passed to the delegate collection.boolean
contains(Object o)
boolean
containsAll(Collection<?> c)
boolean
equals(Object o)
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 itString
getID()
ID used when serializing to GMLSimpleFeatureType
getSchema()
The schema for the child feature members of this collection.int
hashCode()
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 order)
Obtained sorted contents.SimpleFeatureCollection
subCollection(Filter filter)
SimpleFeatureCollection "view" indicated by provided filter.Object[]
toArray()
<F> F[]
toArray(F[] a)
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Field Detail
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delegate
protected SimpleFeatureCollection delegate
the delegate
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Constructor Detail
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DecoratingSimpleFeatureCollection
protected DecoratingSimpleFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate)
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DecoratingSimpleFeatureCollection
protected DecoratingSimpleFeatureCollection(SimpleFeatureCollection delegate)
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Method Detail
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accepts
public void accepts(FeatureVisitor visitor, ProgressListener progress) throws IOException
Description copied from interface:FeatureCollection
Visit the contents of a feature collection.The 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.
- Specified by:
accepts
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Parameters:
visitor
- Closure applied to each feature in turn.progress
- Used to report progress, may be used to interrupt the operation- Throws:
IOException
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canDelegate
protected boolean canDelegate(FeatureVisitor visitor)
Methods for subclass to override in order to determine if the supplied visitor can be passed to the delegate collection.The default is false and the visitor receives the decoraeted features.
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contains
public boolean contains(Object o)
- Specified by:
contains
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- See Also:
Collection.contains(Object)
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containsAll
public boolean containsAll(Collection<?> c)
- Specified by:
containsAll
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- See Also:
Collection.containsAll(Collection)
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features
public SimpleFeatureIterator features()
Description copied from interface:SimpleFeatureCollection
Obtain a SimpleFeatureIterator of the Features within this SimpleFeatureCollection.The 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(); }
- Specified by:
features
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Specified by:
features
in interfaceSimpleFeatureCollection
- Returns:
- A FeatureIterator.
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getBounds
public ReferencedEnvelope getBounds()
Description copied from interface:FeatureCollection
Get the total bounds of this collection which is calculated by doing a union of the bounds of each feature inside of it- Specified by:
getBounds
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Returns:
- An Envelope containing the total bounds of this collection.
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getSchema
public SimpleFeatureType getSchema()
Description copied from interface:FeatureCollection
The schema for the child feature members of this collection.Represents the most general FeatureType in common to all the features in this collection.
- For a collection backed by a shapefiles (or database tables) the FeatureType returned by getSchema() will complete describe each and every child in the collection.
- For mixed content FeatureCollections you will need to check the FeatureType of each Feature as it is retrived from the collection
- The degenerate case returns the "_Feature" FeatureType, where the only thing known is that the contents are Features.
- Specified by:
getSchema
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Returns:
- FeatureType describing the "common" schema to all child features of this collection
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isEmpty
public boolean isEmpty()
Description copied from interface:FeatureCollection
Returns true if this feature collection contains no features.- Specified by:
isEmpty
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Returns:
- true if this collection contains no features
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size
public int size()
Description copied from interface:FeatureCollection
Please note this operation may be expensive when working with remote content.- Specified by:
size
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- See Also:
Collection.size()
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sort
public SimpleFeatureCollection sort(SortBy order)
Description copied from interface:FeatureCollection
Obtained sorted contents.This method may not be supported by all implementations, consider the use of FeatureSource.features( Query ).
- Specified by:
sort
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Specified by:
sort
in interfaceSimpleFeatureCollection
- Parameters:
order
- Sort order- Returns:
- FeatureCollection sorted in the indicated order
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subCollection
public SimpleFeatureCollection subCollection(Filter filter)
Description copied from interface:FeatureCollection
SimpleFeatureCollection "view" indicated by provided filter.The 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:
The above recommended use is agreement with the Collections API precident of List.subList( start, end ).collection.subCollection( filter ).clear();
The results of subCollection:
- are to be considered unordered
- may be an ordered FeatureList if requested when sortBy is indicated
- Specified by:
subCollection
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- Specified by:
subCollection
in interfaceSimpleFeatureCollection
- Returns:
- SimpleFeatureCollection identified as subset.
- See Also:
FeatureList
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toArray
public Object[] toArray()
- Specified by:
toArray
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- See Also:
Collection.toArray()
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toArray
public <F> F[] toArray(F[] a)
- Specified by:
toArray
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
- See Also:
Collection.toArray(Object[])
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getID
public String getID()
Description copied from interface:FeatureCollection
ID used when serializing to GML- Specified by:
getID
in interfaceFeatureCollection<SimpleFeatureType,SimpleFeature>
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