public class MongoFeatureSource extends ContentFeatureSource
entry, hints, lock, query, queryCapabilities, schema, transaction| Constructor and Description |
|---|
MongoFeatureSource(ContentEntry entry,
Query query,
DBCollection collection) |
| Modifier and Type | Method and Description |
|---|---|
protected SimpleFeatureType |
buildFeatureType()
Creates the feature type or schema for the feature source.
|
protected boolean |
canFilter()
Determines if the datastore can natively perform a filtering.
|
protected boolean |
canLimit()
Determines if the datastore can natively limit the number of features returned in a query.
|
protected boolean |
canOffset()
Determines if the datastore can natively skip the first
offset number of
features returned in a query. |
protected boolean |
canRetype()
Determines if the datasatore can natively perform "retyping" which includes limiting the
number of attributes returned and reordering of those attributes
If the subclass can handle retyping natively it should override this method to return
true. |
protected boolean |
canSort()
Determines if the datastore can natively perform sorting.
|
protected ReferencedEnvelope |
getBoundsInternal(Query query)
Calculates the bounds of a specified query.
|
DBCollection |
getCollection() |
protected int |
getCountInternal(Query query)
Calculates the number of features of a specified query.
|
MongoDataStore |
getDataStore()
The datastore that this feature source originated from.
|
CollectionMapper |
getMapper() |
protected FeatureReader<SimpleFeatureType,SimpleFeature> |
getReaderInternal(Query query)
Subclass method for returning a native reader from the datastore.
|
protected boolean |
handleVisitor(Query query,
FeatureVisitor visitor)
Subclass method which allows subclasses to natively handle a visitor.
|
void |
setMapper(CollectionMapper mapper) |
accepts, addFeatureListener, addHints, buildQueryCapabilities, canEvent, canLock, canReproject, canTransact, doLockInternal, doUnlockInternal, getAbsoluteSchema, getBounds, getBounds, getCount, getEntry, getFeatures, getFeatures, getFeatures, getInfo, getName, getQueryCapabilities, getReader, getReader, getReader, getSchema, getState, getSupportedHints, getTransaction, getView, getView, isView, joinQuery, lockFeatures, lockFeatures, lockFeatures, processLock, removeFeatureListener, resolvePropertyNames, resolvePropertyNames, setFeatureLock, setTransaction, unLockFeatures, unLockFeatures, unLockFeaturespublic MongoFeatureSource(ContentEntry entry, Query query, DBCollection collection)
public DBCollection getCollection()
public CollectionMapper getMapper()
public void setMapper(CollectionMapper mapper)
protected SimpleFeatureType buildFeatureType() throws IOException
ContentFeatureSourceImplementations should use SimpleFeatureTypeBuilder to build the feature type.
Also, the builder should be injected with the feature factory which has been set on the
DataStore (see ContentDataStore.getFeatureFactory(). Example:
SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder(); b.setFeatureTypeFactory( getDataStore().getFeatureTypeFactory() ); //build the feature type ...
buildFeatureType in class ContentFeatureSourceIOExceptionpublic MongoDataStore getDataStore()
ContentFeatureSourceSubclasses may wish to extend this method in order to type narrow its return type.
getDataStore in interface FeatureSource<SimpleFeatureType,SimpleFeature>getDataStore in class ContentFeatureSourceFeatureSourceprotected ReferencedEnvelope getBoundsInternal(Query query) throws IOException
ContentFeatureSourcegetBoundsInternal in class ContentFeatureSourceIOExceptionprotected int getCountInternal(Query query) throws IOException
ContentFeatureSourcegetCountInternal in class ContentFeatureSourceIOExceptionprotected FeatureReader<SimpleFeatureType,SimpleFeature> getReaderInternal(Query query) throws IOException
ContentFeatureSourceIt is important to note that if the native reader intends to handle any of the following natively:
true:
ContentFeatureSource.canReproject() - handles Query.getCoordinateSystemReproject() internally.
Example would be PostGIS using Proj to handle reproejction internallyContentFeatureSource.canFilter() - handles Query#getFilter() internally.getReaderInternal in class ContentFeatureSourceIOExceptionprotected boolean handleVisitor(Query query, FeatureVisitor visitor) throws IOException
ContentFeatureSourceSubclasses would override this method and return true in cases where the specific visitor could be handled without iterating over the entire result set of query. An example would be handling visitors that calculate aggregate values.
handleVisitor in class ContentFeatureSourcequery - The query being made.visitor - The visitor toIOExceptionprotected boolean canOffset()
ContentFeatureSourceoffset number of
features returned in a query.
If the subclass can handle a map feature cap natively then it should override this method
to return true. In this case it must do the cap or throw an exception.
Not overriding this method or returning false will case the feature reader
created by the subclass to be be accesset offset times before being returned to the caller.
canOffset in class ContentFeatureSourceprotected boolean canLimit()
ContentFeatureSourceIf the subclass can handle a map feature cap natively then it should override this method
to return true. In this case it must do the cap or throw an exception.
Not overriding this method or returning false will case the feature reader
created by the subclass to be wrapped in a max feature capping decorator when the query
specifies a max feature cap.
canLimit in class ContentFeatureSourceMaxFeatureReaderprotected boolean canRetype()
ContentFeatureSourceIf the subclass can handle retyping natively it should override this method to return
true. In this case it must do the retyping or throw an exception.
Not overriding this method or returning false will cause the feature reader
created by the subclass to be wrapped in a retyping feature reader when the query specifies a
retype.
canRetype in class ContentFeatureSourceReTypeFeatureReaderprotected boolean canSort()
ContentFeatureSourceIf the subclass can handle retyping natively it should override this method to return
true. In this case it must do the retyping or throw an exception.
Not overriding this method or returning false will cause an exception to be
thrown when the query specifies sorting.
canSort in class ContentFeatureSourceSortedFeatureReaderprotected boolean canFilter()
ContentFeatureSourceIf the subclass can handle filtering natively it should override this method to return
true. In this case it must do the filtering or throw an exception. This
includes the case of partial native filtering where the datastore can only handle part of the
filter natively. In these cases it is up to the subclass to apply a decorator to the reader
it returns which will handle any part of the filter can was not applied natively. See FilteringFeatureReader.
Not overriding this method or returning false will cause the feature reader
created by the subclass to be wrapped in a filtering feature reader when the query specifies
a filter. See FilteringFeatureReader.
canFilter in class ContentFeatureSourceCopyright © 1996–2019 Geotools. All rights reserved.