Package org.dspace.content.crosswalk

Class OREDisseminationCrosswalk

java.lang.Object
org.dspace.content.crosswalk.OREDisseminationCrosswalk
All Implemented Interfaces:
DisseminationCrosswalk
public class OREDisseminationCrosswalk extends Object implements DisseminationCrosswalk
ORE dissemination crosswalk

Produces an Atom-encoded ORE aggregation of a DSpace item.

Version:
$Revision: 1 $
Author:
Alexey Maslov

  • Field Details

  • Constructor Details

    • OREDisseminationCrosswalk

      public OREDisseminationCrosswalk()

  • Method Details

    • getNamespaces

      public org.jdom2.Namespace[] getNamespaces()
      Description copied from interface: DisseminationCrosswalk
      Get XML namespaces of the elements this crosswalk may return. Returns the XML namespaces (as JDOM objects) of the root element.
      Specified by:
      getNamespaces in interface DisseminationCrosswalk
      Returns:
      array of namespaces, which may be empty.

    • getSchemaLocation

      public String getSchemaLocation()
      Description copied from interface: DisseminationCrosswalk
      Get the XML Schema location(s) of the target metadata format. Returns the string value of the xsi:schemaLocation attribute that should be applied to the generated XML.

      It may return the empty string if no schema is known, but crosswalk authors are strongly encouraged to implement this call so their output XML can be validated correctly.

      Specified by:
      getSchemaLocation in interface DisseminationCrosswalk
      Returns:
      SchemaLocation string, including URI namespace, followed by whitespace and URI of XML schema document, or empty string if unknown.

    • disseminateElement

      public org.jdom2.Element disseminateElement(Context context, DSpaceObject dso) throws CrosswalkException, IOException, SQLException, AuthorizeException
      Description copied from interface: DisseminationCrosswalk
      Execute crosswalk, returning one XML root element as a JDOM Element object. This is typically the root element of a document.

      Specified by:
      disseminateElement in interface DisseminationCrosswalk
      Parameters:
      context - context
      dso - the DSpace Object whose metadata to export.
      Returns:
      root Element of the target metadata, never null
      Throws:
      CrosswalkInternalException - (CrosswalkException) failure of the crosswalk itself.
      CrosswalkObjectNotSupported - (CrosswalkException) Cannot crosswalk this kind of DSpace object.
      IOException - I/O failure in services this calls
      SQLException - Database failure in services this calls
      AuthorizeException - current user not authorized for this operation.
      CrosswalkException

    • disseminateList

      public List<org.jdom2.Element> disseminateList(Context context, DSpaceObject dso) throws CrosswalkException, IOException, SQLException, AuthorizeException
      Description copied from interface: DisseminationCrosswalk
      Execute crosswalk, returning List of XML elements. Returns a List of JDOM Element objects representing the XML produced by the crosswalk. This is typically called when a list of fields is desired, e.g. for embedding in a METS document xmlData field.

      When there are no results, an empty list is returned, but never null.

      Specified by:
      disseminateList in interface DisseminationCrosswalk
      Parameters:
      context - context
      dso - the DSpace Object whose metadata to export.
      Returns:
      results of crosswalk as list of XML elements.
      Throws:
      CrosswalkInternalException - (CrosswalkException) failure of the crosswalk itself.
      CrosswalkObjectNotSupported - (CrosswalkException) Cannot crosswalk this kind of DSpace object.
      IOException - I/O failure in services this calls
      SQLException - Database failure in services this calls
      AuthorizeException - current user not authorized for this operation.
      CrosswalkException

    • canDisseminate

      public boolean canDisseminate(DSpaceObject dso)
      Description copied from interface: DisseminationCrosswalk
      Predicate: Can this disseminator crosswalk the given object. Needed by OAI-PMH server implementation.
      Specified by:
      canDisseminate in interface DisseminationCrosswalk
      Parameters:
      dso - dspace object, e.g. an Item.
      Returns:
      true when disseminator is capable of producing metadata.

    • preferList

      public boolean preferList()
      Description copied from interface: DisseminationCrosswalk
      Predicate: Does this disseminator prefer to return a list of Elements, rather than a single root Element?

      Some metadata formats have an XML schema without a root element, for example, the Dublin Core and Qualified Dublin Core formats. This would be true for a crosswalk into QDC, since it would "prefer" to return a list, since any root element it has to produce would have to be part of a nonstandard schema. In most cases your implementation will want to return false

      Specified by:
      preferList in interface DisseminationCrosswalk
      Returns:
      true when disseminator prefers you call disseminateList().