private void destinationChannels()

in common/src/main/java/flex/messaging/config/ClientConfigurationParser.java [674:743]
58 lines of code
11 McCabe index (conditional complexity)

    private void destinationChannels(Node dest, DestinationSettings destinationSettings, ServiceSettings serviceSettings) {
        String destId = destinationSettings.getId();

        // Channels attribute
        String channelsList = evaluateExpression(dest, "@" + CHANNELS_ATTR).toString().trim();
        if (channelsList.length() > 0) {
            StringTokenizer st = new StringTokenizer(channelsList, LIST_DELIMITERS);
            while (st.hasMoreTokens()) {
                String ref = st.nextToken().trim();
                ChannelSettings channel = config.getChannelSettings(ref);
                if (channel != null) {
                    destinationSettings.addChannelSettings(channel);
                } else {
                    // {CHANNEL_ELEMENT} not found for reference '{ref}' in destination '{destId}'.
                    ConfigurationException ex = new ConfigurationException();
                    ex.setMessage(REF_NOT_FOUND_IN_DEST, new Object[]{CHANNEL_ELEMENT, ref, destId});
                    throw ex;
                }
            }
        } else {
            // Channels element
            Node channelsNode = selectSingleNode(dest, CHANNELS_ELEMENT);
            if (channelsNode != null) {
                allowedChildElements
                        (channelsNode, DESTINATION_CHANNELS_CHILDREN);
                NodeList channels = selectNodeList(channelsNode, CHANNEL_ELEMENT);
                if (channels.getLength() > 0) {
                    for (int c = 0; c < channels.getLength(); c++) {
                        Node chan = channels.item(c);

                        // Validation
                        requiredAttributesOrElements(chan, DESTINATION_CHANNEL_REQ_CHILDREN);

                        String ref = getAttributeOrChildElement(chan, REF_ATTR).trim();
                        if (ref.length() > 0) {
                            ChannelSettings channel = config.getChannelSettings(ref);
                            if (channel != null) {
                                destinationSettings.addChannelSettings(channel);
                            } else {
                                // {CHANNEL_ELEMENT} not found for reference '{ref}' in destination '{destId}'.
                                ConfigurationException ex = new ConfigurationException();
                                ex.setMessage(REF_NOT_FOUND_IN_DEST, new Object[]{CHANNEL_ELEMENT, ref, destId});
                                throw ex;
                            }
                        } else {
                            //Invalid {0} ref '{1}' in destination '{2}'.
                            ConfigurationException ex = new ConfigurationException();
                            ex.setMessage(INVALID_REF_IN_DEST, new Object[]{CHANNEL_ELEMENT, ref, destId});
                            throw ex;
                        }
                    }
                }
            } else {
                // Finally, we fall back to the service's default channels
                List defaultChannels = serviceSettings.getDefaultChannels();
                Iterator it = defaultChannels.iterator();
                while (it.hasNext()) {
                    ChannelSettings channel = (ChannelSettings) it.next();
                    destinationSettings.addChannelSettings(channel);
                }
            }
        }

        if (destinationSettings.getChannelSettings().size() <= 0) {
            // Destination '{id}' must specify at least one channel.
            ConfigurationException ex = new ConfigurationException();
            ex.setMessage(DEST_NEEDS_CHANNEL, new Object[]{destId});
            throw ex;
        }
    }