implementation.
Subclasses must implement:
-
getDataStore()
-
getSchema()
-
addFeatureListener()
-
removeFeatureListener()
You may find a FeatureSource implementations that is more specific to your needs - such as
JDBCFeatureSource.
For an example of this class customized for use please see MemoryDataStore.
- Author:
- Jody Garnett, Refractions Research Inc
- Module:
modules/library/main (gt-main.jar)
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
hints
protected Set hints
queryCapabilities
protected QueryCapabilities queryCapabilities
AbstractFeatureSource
public AbstractFeatureSource()
AbstractFeatureSource
public AbstractFeatureSource(Set hints)
- This constructors allows to set the supported hints
- Parameters:
hints
-
getDataStore
public abstract DataStore getDataStore()
- Overrides to explicitly type narrow the return type to
DataStore
- Specified by:
getDataStore
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- DataStore implementing this FeatureStore
getName
public Name getName()
- Returns the same name than the feature type (ie,
getSchema().getName()
to honor the simple feature land common
practice of calling the same both the Features produces and their types
- Specified by:
getName
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- the name of the AttributeDescriptor for the Features served by
this FeatureSource
- Since:
- 2.5
- See Also:
FeatureSource.getName()
getInfo
public ResourceInfo getInfo()
- Description copied from interface:
FeatureSource
- Information describing the contents of this resoruce.
Please note that for FeatureContent:
- name - unqiue with in the context of a Service
- schema - used to identify the type of resource; usually gml schema; although it may be more specific
getQueryCapabilities
public QueryCapabilities getQueryCapabilities()
- Description copied from interface:
FeatureSource
- Returns and indication of what query capabilities this FeatureSource
supports natively.
- Specified by:
getQueryCapabilities
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- a QueryCapabilities object containing the native query capabilities.
getTransaction
public Transaction getTransaction()
- Retrieve the Transaction this FeatureSource is operating against.
For a plain FeatureSource that cannot modify this will always be Transaction.AUTO_COMMIT.
- Returns:
- Transacstion FeatureSource is operating against
getFeatures
public FeatureCollection<SimpleFeatureType,SimpleFeature> getFeatures(Query query)
throws IOException
- Provides an interface to for the Results of a Query.
Various queries can be made against the results, the most basic being to retrieve Features.
- Specified by:
getFeatures
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Parameters:
query
-
- Returns:
- Collection The collection to put the features into.
- Throws:
IOException
- For all data source errors.- See Also:
FeatureSource.getFeatures(org.geotools.data.Query)
getFeatures
public FeatureCollection<SimpleFeatureType,SimpleFeature> getFeatures(Filter filter)
throws IOException
- Retrieve all Feature matching the Filter.
- Specified by:
getFeatures
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Parameters:
filter
- Indicates features to retrieve
- Returns:
- FeatureResults indicating features matching filter
- Throws:
IOException
- If results could not be obtained
getFeatures
public FeatureCollection<SimpleFeatureType,SimpleFeature> getFeatures()
throws IOException
- Retrieve all Features.
- Specified by:
getFeatures
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- FeatureResults of all Features in FeatureSource
- Throws:
IOException
- If features could not be obtained
getBounds
public ReferencedEnvelope getBounds()
throws IOException
- Retrieve Bounds of all Features.
Currently returns null, consider getFeatures().getBounds() instead.
Subclasses may override this method to perform the appropriate optimization for this result.
- Specified by:
getBounds
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- null representing the lack of an optimization
- Throws:
IOException
- DOCUMENT ME!
getBounds
public ReferencedEnvelope getBounds(Query query)
throws IOException
- Retrieve Bounds of Query results.
Currently returns null, consider getFeatures( query ).getBounds() instead.
Subclasses may override this method to perform the appropriate optimization for this result.
- Specified by:
getBounds
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Parameters:
query
- Query we are requesting the bounds of
- Returns:
- null representing the lack of an optimization
- Throws:
IOException
- DOCUMENT ME!
namedQuery
protected Query namedQuery(Query query)
- Ensure query modified with typeName.
This method will make copy of the provided query, using
DefaultQuery, if query.getTypeName is not equal to
getSchema().getTypeName().
- Parameters:
query
- Original query
- Returns:
- Query with getTypeName() equal to getSchema().getTypeName()
getCount
public int getCount(Query query)
throws IOException
- Retrieve total number of Query results.
Currently returns -1, consider getFeatures( query ).getCount() instead.
Subclasses may override this method to perform the appropriate optimization for this result.
- Specified by:
getCount
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Parameters:
query
- Query we are requesting the count of
- Returns:
- -1 representing the lack of an optimization
- Throws:
IOException
- if there are errors getting the count
getSupportedHints
public Set getSupportedHints()
- By default, no Hints are supported
- Specified by:
getSupportedHints
in interface FeatureSource<SimpleFeatureType,SimpleFeature>
- Returns:
- a set of
RenderingHints#Key
objects (eventually empty, never null).
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