private UrlCreator resolveUrlCreator()

in grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/DefaultUrlMappingsHolder.java [308:446]
130 lines of code
33 McCabe index (conditional complexity)

    private UrlCreator resolveUrlCreator(final String controller,
                                         final String action,
                                         final String namespace,
                                         final String pluginName,
                                         String httpMethod,
                                         String version,
                                         Map params,
                                         boolean useDefault) {
        UrlMapping mapping = null;

        if (httpMethod == null) {
            httpMethod = UrlMapping.ANY_HTTP_METHOD;
        }
        mapping = namedMappings.get(params.remove("mappingName"));
        if (mapping == null) {
            mapping = lookupMapping(controller, action, namespace, pluginName,httpMethod, version, params);
            if (mapping == null) {
                lookupMapping(controller, action, namespace, pluginName, UrlMapping.ANY_HTTP_METHOD, version, params);
            }
        }
        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            UrlMappingKey lookupKey = new UrlMappingKey(controller, action, namespace, pluginName, httpMethod,version, Collections.<String>emptySet());
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
        }
        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            Set<String> lookupParams = new HashSet<String>(DEFAULT_ACTION_PARAMS);
            Set<String> paramKeys = new HashSet<String>(params.keySet());
            paramKeys.removeAll(lookupParams);
            lookupParams.addAll(paramKeys);

            UrlMappingKey lookupKey = new UrlMappingKey(controller, null, namespace, pluginName, httpMethod, version,lookupParams);
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
            if (mapping == null) {
                lookupParams.removeAll(paramKeys);
                UrlMappingKey lookupKeyModifiedParams = new UrlMappingKey(controller, null, namespace, pluginName, httpMethod,version, lookupParams);
                mapping = mappingsLookup.get(lookupKeyModifiedParams);
                if (mapping == null) {
                    lookupKeyModifiedParams.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                    mapping = mappingsLookup.get(lookupKeyModifiedParams);
                }
            }
        }

        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            Set<String> lookupParams = new HashSet<String>(DEFAULT_CONTROLLER_ONLY_PARAMS);
            Set<String> paramKeys = new HashSet<String>(params.keySet());
            paramKeys.removeAll(lookupParams);
            lookupParams.addAll(paramKeys);

            UrlMappingKey lookupKey = new UrlMappingKey(null, action, namespace, pluginName, httpMethod, version, lookupParams);
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
            if (mapping == null) {
                lookupParams.removeAll(paramKeys);
                UrlMappingKey lookupKeyModifiedParams = new UrlMappingKey(null, action, namespace, pluginName, httpMethod, version, lookupParams);
                mapping = mappingsLookup.get(lookupKeyModifiedParams);
                if (mapping == null) {
                    lookupKeyModifiedParams.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                    mapping = mappingsLookup.get(lookupKeyModifiedParams);
                }
            }
        }

        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            Set<String> lookupParams = new HashSet<String>(DEFAULT_CONTROLLER_PARAMS);
            Set<String> paramKeys = new HashSet<String>(params.keySet());
            paramKeys.removeAll(lookupParams);
            lookupParams.addAll(paramKeys);

            UrlMappingKey lookupKey = new UrlMappingKey(null, null, namespace, pluginName, httpMethod, version,lookupParams);
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
            if (mapping == null) {
                lookupParams.removeAll(paramKeys);
                UrlMappingKey lookupKeyModifiedParams = new UrlMappingKey(null, null, namespace, pluginName, httpMethod, version,lookupParams);
                mapping = mappingsLookup.get(lookupKeyModifiedParams);
                if (mapping == null) {
                    lookupKeyModifiedParams.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                    mapping = mappingsLookup.get(lookupKeyModifiedParams);
                }
            }
        }
        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            Set<String> lookupParams = new HashSet<>(DEFAULT_NAMESPACE_PARAMS);
            Set<String> paramKeys = new HashSet<String>(params.keySet());
            paramKeys.removeAll(lookupParams);
            lookupParams.addAll(paramKeys);

            UrlMappingKey lookupKey = new UrlMappingKey(null, null, null, pluginName, httpMethod, version,lookupParams);
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
            if (mapping == null) {
                lookupParams.removeAll(paramKeys);
                UrlMappingKey lookupKeyModifiedParams = new UrlMappingKey(null, null, null, pluginName, httpMethod, version,lookupParams);
                mapping = mappingsLookup.get(lookupKeyModifiedParams);
                if (mapping == null) {
                    lookupKeyModifiedParams.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                    mapping = mappingsLookup.get(lookupKeyModifiedParams);
                }
            }
        }

        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            Set<String> lookupParams = new HashSet<String>();
            UrlMappingKey lookupKey = new UrlMappingKey(controller, null, namespace, pluginName, httpMethod, version, lookupParams);
            mapping = mappingsLookup.get(lookupKey);
            if (mapping == null) {
                lookupKey.httpMethod = UrlMapping.ANY_HTTP_METHOD;
                mapping = mappingsLookup.get(lookupKey);
            }
        }

        UrlCreator creator = null;
        if (mapping == null || (mapping instanceof ResponseCodeUrlMapping)) {
            if (useDefault) {
                creator = new DefaultUrlCreator(controller, action);
            }
        } else {
            creator = mapping;
        }
        return creator;
    }