protected List executeCore()

in server/core/src/main/java/org/apache/vysper/xmpp/modules/core/base/handler/MessageHandler.java [62:139]
65 lines of code
20 McCabe index (conditional complexity)

    protected List<Stanza> executeCore(XMPPCoreStanza stanza, ServerRuntimeContext serverRuntimeContext,
            boolean isOutboundStanza, SessionContext sessionContext, StanzaBroker stanzaBroker) {

        // (try to) read thread id
        String threadId = null;
        XMLElement threadElement = null;
        try {
            threadElement = stanza.getSingleInnerElementsNamed("thread");
            if (threadElement != null && threadElement.getSingleInnerText() != null) {
                try {
                    threadId = threadElement.getSingleInnerText().getText();
                } catch (Exception _) {
                    threadId = null;
                }
            }
        } catch (XMLSemanticError _) {
            threadId = null;
        }

        // (try to) read subject id
        String subject = null;
        XMLElement subjectElement = null;
        try {
            subjectElement = stanza.getSingleInnerElementsNamed("subject");
            if (subjectElement != null && subjectElement.getSingleInnerText() != null) {
                try {
                    subject = subjectElement.getSingleInnerText().getText();
                } catch (Exception _) {
                    subject = null;
                }
            }
        } catch (XMLSemanticError _) {
            subject = null;
        }

        // TODO inspect all BODY elements and make sure they conform to the spec

        if (isOutboundStanza) {

            Entity from = stanza.getFrom();
            if (from == null || !from.isResourceSet()) {
                // rewrite stanza with new from
                String resource = serverRuntimeContext.getResourceRegistry()
                        .getUniqueResourceForSession(sessionContext);
                if (resource == null)
                    throw new IllegalStateException("could not determine unique resource");
                from = new EntityImpl(sessionContext.getInitiatingEntity(), resource);
                StanzaBuilder stanzaBuilder = new StanzaBuilder(stanza.getName(), stanza.getNamespaceURI());
                for (Attribute attribute : stanza.getAttributes()) {
                    if ("from".equals(attribute.getName()))
                        continue;
                    stanzaBuilder.addAttribute(attribute);
                }
                stanzaBuilder.addAttribute("from", from.getFullQualifiedName());
                for (XMLElement preparedElement : stanza.getInnerElements()) {
                    stanzaBuilder.addPreparedElement(preparedElement);
                }
                stanza = XMPPCoreStanza.getWrapper(stanzaBuilder.build());
            }

            // check if message reception is turned of either globally or locally
            if (!serverRuntimeContext.getServerFeatures().isRelayingMessages()
                    || (sessionContext != null && sessionContext
                            .getAttribute(SessionContext.SESSION_ATTRIBUTE_MESSAGE_STANZA_NO_RECEIVE) != null)) {
                return Collections.emptyList();
            }

            try {
                stanzaBroker.write(stanza.getTo(), stanza, new ReturnErrorToSenderFailureStrategy(stanzaBroker));
            } catch (Exception e) {
                // TODO return error stanza
                e.printStackTrace(); // To change body of catch statement use File | Settings | File Templates.
            }
        } else {
            stanzaBroker.writeToSession(stanza);
        }
        return Collections.emptyList();
    }