@Override
public ArrayList<String> getIdentifiers(Context context, T dso) {
ArrayList<String> identifiers = new ArrayList<>();
IdentifierService identifierService = new DSpace().getSingletonService(IdentifierService.class);
if (identifierService != null) {
identifiers.addAll(identifierService.lookup(context, dso));
} else {
log.warn("No IdentifierService found, will return an list containing " + "the Handle only.");
if (dso.getHandle() != null) {
identifiers.add(handleService.getCanonicalForm(dso.getHandle()));
}
}
if (log.isDebugEnabled()) {
StringBuilder dbgMsg = new StringBuilder();
for (String id : identifiers) {
if (dbgMsg.capacity() == 0) {
dbgMsg.append("This DSO's Identifiers are: ");
} else {
dbgMsg.append(", ");
}
dbgMsg.append(id);
}
dbgMsg.append(".");
log.debug(dbgMsg.toString());
}
return identifiers;
}
/**
* Tries to lookup all Identifiers of this DSpaceObject.
*
* @return An array containing all found identifiers or an array with a length of 0.
*/
public String[] getIdentifiers(Context context) {
if (identifiers == null) {
log.debug("This DSO's identifiers cache is empty, looking for identifiers...");
identifiers = new String[0];
IdentifierService identifierService =
new DSpace().getSingletonService(IdentifierService.class);
if (identifierService != null) {
identifiers = identifierService.lookup(context, this);
} else {
log.warn(
"No IdentifierService found, will return an array containing " + "the Handle only.");
if (getHandle() != null) {
identifiers = new String[] {HandleManager.getCanonicalForm(getHandle())};
}
}
}
// it the DSO has no identifiers at all including handle, we should return an empty array.
// G.e. items during submission (workspace items) have no handle and no other identifier.
if (identifiers == null) {
identifiers = new String[] {};
}
if (log.isDebugEnabled()) {
StringBuilder dbgMsg = new StringBuilder();
for (String id : identifiers) {
if (dbgMsg.capacity() == 0) {
dbgMsg.append("This DSO's Identifiers are: ");
} else {
dbgMsg.append(", ");
}
dbgMsg.append(id);
}
dbgMsg.append(".");
log.debug(dbgMsg.toString());
}
return identifiers;
}