org.geotools.data.collection
Class CollectionDataStore

java.lang.Object
  org.geotools.data.AbstractDataStore
      org.geotools.data.collection.CollectionDataStore

All Implemented Interfaces:

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 org.geotools.data.AbstractDataStore

isWriteable, listenerManager, LOGGER

Constructor Summary

CollectionDataStore(FeatureCollection collection)
Builds a data store wrapper on top of a feature collection

Method Summary

protected com.vividsolutions.jts.geom.Envelope	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 com.vividsolutions.jts.geom.Envelope	getBoundsInternal(Query query)
FeatureCollection	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	getFeatureReader(java.lang.String typeName) Provides FeatureReader over the entire contents of typeName.
FeatureType	getSchema(java.lang.String typeName) Retrive schema information for typeName
java.lang.String[]	getTypeNames() Convience method for retriving all the names from the Catalog Entires

Methods inherited from class org.geotools.data.AbstractDataStore

createFeatureWriter, createLockingManager, createMetadata, createSchema, getFeatureReader, getFeatureReader, getFeatureSource, getFeatureWriter, getFeatureWriter, getFeatureWriter, getFeatureWriterAppend, getLockingManager, getUnsupportedFilter, getView, updateSchema

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionDataStore

public CollectionDataStore(FeatureCollection collection)

Builds a data store wrapper on top of a feature collection

Parameters:

collection -

Method Detail

getTypeNames

public java.lang.String[] getTypeNames()

Description copied from class: AbstractDataStore

Convience method for retriving all the names from the Catalog Entires

Specified by:

getTypeNames in interface DataStore

Specified by:

getTypeNames in class AbstractDataStore

See Also:

DataStore.getTypeNames()

getSchema

public FeatureType getSchema(java.lang.String typeName)
                      throws java.io.IOException

Description copied from class: AbstractDataStore

Retrive schema information for typeName

Specified by:

getSchema in interface DataStore

Specified by:

getSchema in class AbstractDataStore

Throws:

java.io.IOException

See Also:

DataStore.getSchema(java.lang.String)

getFeatureReader

public FeatureReader getFeatureReader(java.lang.String typeName)
                               throws java.io.IOException

Provides FeatureReader over the entire contents of typeName.

Implements getFeatureReader contract for AbstractDataStore.

Specified by:

getFeatureReader in class AbstractDataStore

Parameters:

typeName -

Returns:

Throws:

java.io.IOException - If typeName could not be found

DataSourceException - See IOException

See Also:

AbstractDataStore.getFeatureSource(java.lang.String)

getCollection

public FeatureCollection getCollection()

Returns the feature collection held by this data store

Returns:

getBounds

protected com.vividsolutions.jts.geom.Envelope 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

Parameters:

query -

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 com.vividsolutions.jts.geom.Envelope getBoundsInternal(Query query)

Parameters:

query -

getCount

protected int getCount(Query query)
                throws java.io.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:

java.io.IOException - if there are errors getting the count

See Also:

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