Community/collection hierarchy navigation object

README.md

• ChecksumRest (algorithm, value) - value object - no database id
• MetadataEntryRest(key, value, language)
• BaseObjectRest (id) - object with a database identifier (may or may not have metadata)
  • BitstreamFormatRest (description, mime, etc)
  • DSpaceObjectRest (uuid, type, name) - lightweight representation of an object id without metadata
    • BrowsableObjectRest(handle, link to breadcrumb list) - representation of a node with a handle and parents
      • ItemRest(metadata, item prop) - actual item object
      • BreadcrumbObjectRest - ancestor object without descendant nodes populated
        • DescendantTreeObjectRest(children) - representation of an ancestor node with descendants fully populated
        • HierarchicalObjectRest(metadata) - representation of a node with metadata
          • CollectionRest(collection prop)
          • CommunityRest(community prop)
          • SiteRest(site prop)
    • NonNavigableObjectRest(metadata) - non hiearchical objects that contain metadata
      • BitstreamRest
      • EPersonRest
      • EPersonGroupRest

LightweightNavigableObjectRest.java

DSpaceObjectRest extends BaseObjectRest {
  private String uuid;
  private String name;
  private String type}
}

BrowsableObjectRest extends DSpaceObjectRest {
  private String handle;
	
  //link to breadcrumb trail
  private List<BreadcrumbObjectRest> breadcrumbList;

  //link to fully instatiated DSO
  private DescibableObjectRest dso;
}

interface DescribableObjectRest {
  public List<MetadataEntryRest> getMetadata();
}

ItemRest extends BrowsableObjectRest implementes DescribableObjectRest {
  private List<MetadataEntryRest> metadata;
  private boolean inArchive = false;
  private boolean discoverable = false;
  private boolean withdrawn = false;
  private Date lastModified = new Date();
  @JsonIgnore
  private CollectionRest owningCollection;
  @JsonIgnore
  private CollectionRest templateItemOf;
  //private EPerson submitter;
	
  List<BitstreamRest> bitstreams;
}

BreadcrumbObjectRest extends BrowsableObjectRest {
}

//instantiation of a hiearchical node with all descendant nodes populated
DescendantTreeObjectRest extends BreadcrumbObjectRest {
  List<AncestorObjectRest> children;
}

HierarchicalObjectRest extends BreadcrumbObjectRest imlements DescribableObjectRest {
  private List<MetadataEntryRest> metadata;
  //link to object returning descendants
  List<DescendantTreeObjectRest> getDescendants();
}

CollectionRest extends HiearchicalObjectRest {
}

CommunityRest extends HiearchicalObjectRest {
}

SiteRest extends HiearchicalObjectRest {
}

//Bitstream, EPerson, EPersonGroup
NonNavigableObjectRest extends DSpaceObjectRest implements DescribableObjectRest {
  private List<MetadataEntryRest> metadata;
}