Catalogue API¶

Workspaces¶

A workspace is a container for any number of stores. All workspaces can be obtained with the getWorkspaces(). A workspace is identified by its name ( WorkspaceInfo.getName()``). A workspace can be looked up by its name with the getWorkspaceByName(String) method.

Stores¶

The getStores(Class) method provides access to all the stores in the catalog of a specific type. For instance, the following would obtain all datstores from the catalog:

//get all datastores
List<DataStoreInfo> dataStores = catalog.getStores( DataStoreInfo.class );

The methods getDataStores() and getCoverageStores() provide a convenience for the two well known types.

A store is contained within a workspace (see StoreInfo.getWorkspace()). The Catalog.getStoresByWorkspace(WorkspaceInfo, Class) method for only stores contained with a specific workspace. For instance, the following would obtain all datastores contained within a particular workspace:

//get a workspace
WorkspaceInfo workspace = catalog.getWorkspace( "myWorkspace" );

//get all datastores in that workspace
List<DataStoreInfo> dataStores = catalog.getStoresByWorkspace( workspace, DataStoreInfo.class );

Resources¶

The getResources(Class) method provides access to all resources in the catalog of a particular type. For instance, to acess all feature types in the catalog:

List<FeatureTypeInfo> featureTypes = catalog.getResources( FeatureTypeInfo.class );

The getFeatureTypes() and getCoverages() methods are a convenience for the well known types.

A resource is contained within a namespace, therefore it is identified by a namespace uri, local name pair. The getResourceByName(String, String, Class) method provides access to a resource by its namespace qualified name. The method getResourceByName(String, Class) provides access to a resource by its unqualified name. The latter method will do an exhaustive search of all namespaces for a resource with the specified name. If only a single resource with the name is found it is returned. Some examples:

//get a feature type by its qualified name
FeatureTypeInfo ft = catalog.getResourceByName(
   "http://myNamespace.org", "myFeatureType", FeatureTypeInfo.class );

//get a feature type by its unqualified name
ft = catalog.getResourceByName( "myFeatureType", FeatureTypeInfo.class );

//get all feature types in a namespace
NamespaceInfo ns = catalog.getNamespaceByURI( "http://myNamespace.org" );
List<FeatureTypeInfo> featureTypes = catalog.getResourcesByNamespace( ns, FeatureTypeINfo.class );

Layers¶

A layer is used to publish a resource. The getLayers() method provides access to all layers in the catalog. A layer is uniquely identified by its name. The getLayerByName(String) method provides access to a layer by its name. The getLayers(ResourceInfo) return all the layers published from a specific resource. Some examples:

//get a layer by its name
LayerInfo layer = catalog.getLayer( "myLayer" );

//get all the layers for a particualr feature type
FeatureTypeInfo ft = catalog.getFeatureType( "http://myNamespace", "myFeatureType" );
List<LayerInfo> layers = catalog.getLayers( ft );

Modifing the Catalog¶

Catalog objects such as stores and resoures are mutable and can be modified. However, any modifications made on an object do not apply until they are saved. For instance, consider the following example of modifying a feature type:

//get a feature type
FeatureTypeInfo featureType = catalog.getFeatureType( "http://myNamespace.org", "myFeatureType" );

//modify it
featureType.setBoundingBox( new Envelope(...) );

//save it
catalog.save( featureType );

Isolated Workspaces¶

It is possible to request a catalog object using its workspace prefix or its namespace URI, the last method will not work to retrieve the content of an isolated workspace unless in the context of a virtual service belonging to that workspace.