Metacat

        //transform a sid to a pid if it is applicable

        String serviceFailureCode = "1310";

        Identifier sid = getPIDForSID(pid, serviceFailureCode);

        if(sid != null) {

            pid = sid;

        }

        // verify the new pid is valid format

        if (!isValidIdentifier(newPid)) {

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

        }

        // make sure that the newPid doesn't exists

        boolean idExists = true;

        try {

            idExists = IdentifierManager.getInstance().identifierExists(newPid.getValue());

        } catch (SQLException e) {

            throw new ServiceFailure("1310", 

                                    "The requested identifier " + newPid.getValue() +

                                    " couldn't be determined if it is unique since : "+e.getMessage());

        }

        if (idExists) {

                throw new IdentifierNotUnique("1220", 

                          "The requested identifier " + newPid.getValue() +

                          " is already used by another object and" +

                          "therefore can not be used for this object. Clients should choose" +

                          "a new identifier that is unique and retry the operation or " +

                          "use CN.reserveIdentifier() to reserve one.");

        }

            //check the sid in the system metadata. If it exists, it should be non-exist or match the old sid in the previous system metadata.

            Identifier sidInSys = sysmeta.getSeriesId();

            if(sidInSys != null) {

                Identifier previousSid = existingSysMeta.getSeriesId();

                if(previousSid != null) {

                    // there is a previous sid, if the new sid doesn't match it, the new sid should be non-existing.

                    if(!sidInSys.getValue().equals(previousSid)) {

                        try {

                            idExists = IdentifierManager.getInstance().identifierExists(sidInSys.getValue());

                        } catch (SQLException e) {

                            throw new ServiceFailure("1310", 

                                                    "The requested identifier " + sidInSys.getValue() +

                                                    " couldn't be determined if it is unique since : "+e.getMessage());

                        }

                        if(idExists) {

                            throw new InvalidSystemMetadata("1300", "The series id "+sidInSys.getValue()+" in the system metadata doesn't match the previous series id "

                                                            +previousSid.getValue()+", so it should NOT exist. However, it was used by another object.");

                        }

                    }

                } else {

                    // there is no previous sid, the new sid should be non-existing.

                    try {

                        idExists = IdentifierManager.getInstance().identifierExists(sidInSys.getValue());

                    } catch (SQLException e) {

                        throw new ServiceFailure("1310", 

                                                "The requested identifier " + sidInSys.getValue() +

                                                " couldn't be determined if it is unique since : "+e.getMessage());

                    }

                    if(idExists) {

                        throw new InvalidSystemMetadata("1300", "The series id "+sidInSys.getValue()+" in the system metadata should NOT exist since the previous series id is null."

                                                        +"However, it was used by another object.");

                    }

                }

            }