public GremlinCluster create()

in gremlin-client/src/main/java/software/amazon/neptune/cluster/NeptuneGremlinClusterBuilder.java [388:440]
45 lines of code
9 McCabe index (conditional complexity)

    public GremlinCluster create() {

        innerBuilder.enableSsl(this.enableSsl);

        Collection<Endpoint> filteredEndpoints = new ArrayList<>();
        Set<String> rejectedReasons = new HashSet<>();

        if (endpointFilter != null) {
            innerBuilder.endpointFilter(endpointFilter);
            for (Endpoint endpoint : endpoints) {
                ApprovalResult approvalResult = endpointFilter.approveEndpoint(endpoint);
                if (approvalResult.isApproved()) {
                    filteredEndpoints.add(endpoint);
                } else {
                    rejectedReasons.add(approvalResult.reason());
                }
            }
        } else {
            filteredEndpoints.addAll(endpoints);
        }

        if (filteredEndpoints.isEmpty()) {
            if (!rejectedReasons.isEmpty()) {
                throw new EndpointsUnavailableException(rejectedReasons);
            }
            if (isDirectConnection()) {
                throw new IllegalStateException("The list of endpoint addresses is empty. You must supply one or more endpoints.");
            } else if (enableIamAuth) {
                throw new IllegalStateException("The list of endpoint addresses is empty. You must supply one or more endpoints to sign the Host header.");
            }
        }

        for (Endpoint endpoint : filteredEndpoints) {
            innerBuilder.addContactPoint(endpoint);
        }

        TopologyAwareBuilderConfigurator configurator = new HandshakeInterceptorConfigurator(
                isDirectConnection(),
                interceptor,
                enableIamAuth,
                port,
                proxyPort,
                proxyAddress,
                serviceRegion,
                iamProfile,
                credentials,
                removeHostHeader
        );

        innerBuilder.topologyAwareBuilderConfigurator(configurator);

        return innerBuilder.create();
    }