org.geotools.data.collection
Class CollectionDataStore

Object
  AbstractDataStore
      CollectionDataStore

All Implemented Interfaces:

DataAccess<SimpleFeatureType,SimpleFeature>, DataStore

public class CollectionDataStore
extends AbstractDataStore

Simple data store wrapper for feature collections. Allows to use feature collections in the user interface layer and everything else where a data store or a feature source is needed.

Field Summary

Fields inherited from class AbstractDataStore

isWriteable, listenerManager, LOGGER

Constructor Summary

CollectionDataStore(FeatureCollection<SimpleFeatureType,SimpleFeature> collection)
Builds a data store wrapper on top of a feature collection

CollectionDataStore(SimpleFeatureType schema)
Builds a data store wrapper around an empty collection.

Method Summary

protected ReferencedEnvelope	getBounds(Query query) Computes the bounds of the features for the specified feature type that satisfy the query provided that there is a fast way to get that result.
protected ReferencedEnvelope	getBoundsInternal(Query query)
FeatureCollection<SimpleFeatureType,SimpleFeature>	getCollection() Returns the feature collection held by this data store
protected int	getCount(Query query) Gets the number of the features that would be returned by this query for the specified feature type.
FeatureReader<SimpleFeatureType,SimpleFeature>	getFeatureReader(String typeName) Provides FeatureReader over the entire contents of typeName.
SimpleFeatureType	getSchema(String typeName) Retrive schema information for typeName
String[]	getTypeNames() helper method for retrieving all the names.

Methods inherited from class AbstractDataStore

createFeatureWriter, createLockingManager, createMetadata, createSchema, dispose, getFeatureReader, getFeatureReader, getFeatureSource, getFeatureSource, getFeatureWriter, getFeatureWriter, getFeatureWriterAppend, getInfo, getLockingManager, getNames, getSchema, getSupportedHints, getUnsupportedFilter, state, updateSchema, updateSchema

Methods inherited from class Object

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

Constructor Detail

CollectionDataStore

public CollectionDataStore(SimpleFeatureType schema)

Builds a data store wrapper around an empty collection.

Parameters:

collection -

CollectionDataStore

public CollectionDataStore(FeatureCollection<SimpleFeatureType,SimpleFeature> collection)

Builds a data store wrapper on top of a feature collection

Parameters:

collection -

Method Detail

getTypeNames

public String[] getTypeNames()

Description copied from class: AbstractDataStore

helper method for retrieving all the names.

Specified by:

getTypeNames in interface DataStore

Specified by:

getTypeNames in class AbstractDataStore

Returns:

names of feature types available in this DataStore

See Also:

DataStore.getTypeNames()

getSchema

public SimpleFeatureType getSchema(String typeName)
                            throws IOException

Description copied from class: AbstractDataStore

Retrive schema information for typeName

Specified by:

getSchema in interface DataStore

Specified by:

getSchema in class AbstractDataStore

Parameters:

typeName - the feature type name

Returns:

the requested feature type

Throws:

IOException - if typeName is not available

See Also:

DataStore.getSchema(java.lang.String)

getFeatureReader

public FeatureReader<SimpleFeatureType,SimpleFeature> getFeatureReader(String typeName)
                                                                throws IOException

Provides FeatureReader over the entire contents of typeName.

Implements getFeatureReader contract for AbstractDataStore.

Specified by:

getFeatureReader in class AbstractDataStore

Parameters:

typeName -

Returns:

FeatureReader over contents of typeName

Throws:

IOException - If typeName could not be found

DataSourceException - See IOException

See Also:

AbstractDataStore.getFeatureSource(java.lang.String)

getCollection

public FeatureCollection<SimpleFeatureType,SimpleFeature> getCollection()

Returns the feature collection held by this data store

getBounds

protected ReferencedEnvelope getBounds(Query query)
                                throws SchemaNotFoundException

Description copied from class: AbstractDataStore

Computes the bounds of the features for the specified feature type that satisfy the query provided that there is a fast way to get that result.

Will return null if there is not fast way to compute the bounds. Since it's based on some kind of header/cached information, it's not guaranteed to be real bound of the features

Overrides:

getBounds in class AbstractDataStore

Returns:

the bounds, or null if too expensive

Throws:

SchemaNotFoundException

See Also:

org.geotools.data.AbstractDataStore#getBounds(java.lang.String, org.geotools.data.Query)

getBoundsInternal

protected ReferencedEnvelope getBoundsInternal(Query query)

Parameters:

query -

getCount

protected int getCount(Query query)
                throws IOException

Description copied from class: AbstractDataStore

Gets the number of the features that would be returned by this query for the specified feature type.

If getBounds(Query) returns -1 due to expense consider using getFeatures(Query).getCount() as a an alternative.

Overrides:

getCount in class AbstractDataStore

Parameters:

query - Contains the Filter and MaxFeatures to find the bounds for.

Returns:

The number of Features provided by the Query or -1 if count is too expensive to calculate or any errors or occur.

Throws:

IOException

See Also:

org.geotools.data.AbstractDataStore#getCount(java.lang.String, org.geotools.data.Query)