public PublicKeyRecord publicRecordLookup()

in main/src/main/java/org/apache/james/jdkim/DKIMVerifier.java [154:195]
36 lines of code
10 McCabe index (conditional complexity)

    public PublicKeyRecord publicRecordLookup(SignatureRecord sign)
            throws TempFailException, PermFailException {
        // System.out.println(sign);
        PublicKeyRecord key = null;
        TempFailException lastTempFailure = null;
        PermFailException lastPermFailure = null;
        for (Iterator<CharSequence> rlm = sign.getRecordLookupMethods().iterator(); key == null
                && rlm.hasNext(); ) {
            CharSequence method = rlm.next();
            try {
                PublicKeyRecordRetriever pkrr = getPublicKeyRecordRetriever();
                List<String> records = pkrr.getRecords(method, sign.getSelector()
                        .toString(), sign.getDToken().toString());
                PublicKeyRecord tempKey = publicKeySelector(records);
                // checks wether the key is applicable to the signature
                // TODO check with the IETF group to understand if this is the
                // right thing to do.
                // TODO loggin
                apply(tempKey, sign);
                key = tempKey;
            } catch (TempFailException tf) {
                lastTempFailure = tf;
            } catch (PermFailException pf) {
                lastPermFailure = pf;
            }
        }
        if (key == null) {
            if (lastTempFailure != null) {
                if (sign != null) lastTempFailure.setRelatedRecordIdentity(sign.getIdentity().toString());
                throw lastTempFailure;
            } else if (lastPermFailure != null) {
                if (sign != null) lastPermFailure.setRelatedRecordIdentity(sign.getIdentity().toString());
                throw lastPermFailure;
            }            // this is unexpected because the publicKeySelector always returns
            // null or exception
            else {
                throw new PermFailException(
                        "no key for signature [unexpected condition]", sign.getIdentity().toString());
            }
        }
        return key;
    }