Package org.gcube.informationsystem.resourceregistry.types

Class SchemaSnapshotTypesDiscoverer

java.lang.Object
org.gcube.informationsystem.resourceregistry.types.SchemaSnapshotTypesDiscoverer
All Implemented Interfaces:
org.gcube.informationsystem.model.knowledge.TypesDiscoverer<org.gcube.informationsystem.types.reference.Type>
public class SchemaSnapshotTypesDiscoverer extends Object implements org.gcube.informationsystem.model.knowledge.TypesDiscoverer<org.gcube.informationsystem.types.reference.Type>
TypesDiscoverer backed by an already-loaded SchemaSnapshot: discovers types by filtering its flat SchemaSnapshot.getTypes() by Type.getAccessType(), in-process and with no additional I/O.

Unlike RRCTypesDiscoverer/RRCCTypesDiscoverer, which fetch types from the Resource Registry server over HTTP, this discoverer runs inside the server itself: the snapshot it reads from has already paid the cost of walking the type graph, so this class only partitions what is already in memory.

Author:
Luca Frosini (ISTI - CNR)

  • Constructor Details

    • SchemaSnapshotTypesDiscoverer

      public SchemaSnapshotTypesDiscoverer(SchemaSnapshot snapshot)
      Creates a discoverer backed by the given snapshot.
      Parameters:
      snapshot - the schema snapshot to discover types from

  • Method Details

    • discover

      public Collection<org.gcube.informationsystem.types.reference.Type> discover(org.gcube.informationsystem.base.reference.AccessType accessType)

      Returns every type in the snapshot whose own Type.getAccessType() equals the requested one -- each leaf schema type (e.g. ResourceSchemaImpl, FacetSchemaImpl) reports its own concrete AccessType rather than an ancestor's, so this is exactly the subtree a server-side getTypeFromServer(accessType.getTypeClass(), DEPTH_UNLIMITED) call would return.

      Specified by:
      discover in interface org.gcube.informationsystem.model.knowledge.TypesDiscoverer<org.gcube.informationsystem.types.reference.Type>