Metacat

import org.apache.commons.io.IOUtils;

        EventLog.getInstance().log(metacatUrl, subject.getValue(), localId, "delete");

  	String localId = null;

  	boolean allowed = false;

  	boolean isScienceMetadata = false;

  	Subject subject = session.getSubject();

  	List<Group> groupList = session.getSubjectList().getGroupList();

  	String[] groups = new String[groupList.size()];

  	IdentifierManager im = IdentifierManager.getInstance();

  	// put the group names into a string array

  	if( session != null ) {

  	  for ( int i = 0; i > groupList.size(); i++ ) {

  	  	groups[i] = groupList.get(i).getGroupName();

  	  }

  	}

  	// be sure the user is authenticated for update()

  	if (subject.getValue() == null || 

  	    subject.getValue().toLowerCase().equals("public") ) {

  	  throw new NotAuthorized("1200", "The provided identity does not have " +

  	    "permission to UPDATE objects on the Member Node.");

  	}

  	// do we have a valid pid?

  	if ( pid == null || pid.getValue().trim().equals("") ) {

  	  throw new InvalidRequest("1202", "The provided identifier was invalid.");

  	}

  	// check for the existing identifier

  	try {

  	  localId = im.getLocalId(pid.getValue());

  	} catch (McdbDocNotFoundException e) {

  	  throw new InvalidRequest("1202", "The object with the provided " +

  	  	"identifier was not found.");

  	}

  	// does the subject have WRITE ( == update) priveleges on the pid?

  	allowed = isAuthorized(session, pid, Permission.WRITE);

  	if ( allowed ) {

  		// get the existing system metadata for the object

  		SystemMetadata existingSysMeta = getSystemMetadata(session, pid);

  		// add the obsoleted pid to the obsoletedBy list

  		List<Identifier> obsoletedList = existingSysMeta.getObsoletedByList();

  		obsoletedList.add(pid);

  		existingSysMeta.setObsoletedByList(obsoletedList);

  		// then update the existing system metadata

  		updateSystemMetadata(existingSysMeta);

  		// prep the new system metadata, add pid to the obsoletes list

  		sysmeta.addObsolete(pid);

  		// and insert the new system metadata

  		insertSystemMetadata(sysmeta);

  		isScienceMetadata = isScienceMetadata(sysmeta);

  		// do we have XML metadata or a data object?

  		if ( isScienceMetadata ) {

  			// update the science metadata XML document

  			// TODO: handle non-XML metadata/data documents (like netCDF)

  			// TODO: don't put objects into memory using stream to string

      	String objectAsXML = "";

      	try {

	        objectAsXML = IOUtils.toString(object, "UTF-8");

	  			localId = insertOrUpdateDocument(objectAsXML, newPid, session, "update");

	  			// register the newPid and the generated localId

      	  if ( newPid != null ) {

      	  	im.createMapping(newPid.getValue(), localId);

      	  }

      	} catch (IOException e) {

        	String msg = "The Node is unable to create the object. " +

          "There was a problem converting the object to XML";

        	logMetacat.info(msg);

          throw new ServiceFailure("1310", msg + ": " + e.getMessage());

      	}

  		} else {

  			// update the data object

  			localId = insertDataObject(object, newPid, session);

  			// register the newPid and the generated localId

    	  if ( newPid != null ) {

    	  	im.createMapping(newPid.getValue(), localId);

    	  }

  		}

  		// log the update event

      EventLog.getInstance().log(metacatUrl, subject.getValue(), localId, "update");

  	} else {

  	  throw new NotAuthorized("1200", "The provided identity does not have " +

  	  "permission to UPDATE the object identified by " +

  	  pid.getValue() + " on the Member Node.");

  	}