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package org.onap.vid.aai.util;
import com.google.common.collect.ImmutableMap;
import org.apache.commons.text.StrSubstitutor;
import org.onap.vid.aai.AaiClientInterface;
import org.onap.vid.aai.model.AaiGetNetworkCollectionDetails.*;
import org.onap.vid.aai.model.interfaces.AaiModelWithRelationships;
import org.onap.vid.utils.Multival;
import org.onap.vid.utils.Unchecked;
import javax.inject.Inject;
import java.net.URI;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Stream;
import static java.util.stream.Collectors.toSet;
public class ServiceInstanceStandardQuery {
private static final String SERVICE_INSTANCE_URI_TEMPLATE = "" +
"business/customers/customer/${global-customer-id}" +
"/service-subscriptions/service-subscription/${service-type}" +
"/service-instances/service-instance/${service-instance-id}";
private final AaiClientInterface aaiClient;
@Inject
public ServiceInstanceStandardQuery(AaiClientInterface aaiClient) {
this.aaiClient = aaiClient;
}
public ServiceInstance fetchServiceInstance(String globalCustomerId, String serviceType, String serviceInstanceId) {
final String serviceInstanceUri = getServiceInstanceUri(globalCustomerId, serviceType, serviceInstanceId);
return fetchServiceInstance(Unchecked.toURI(serviceInstanceUri));
}
ServiceInstance fetchServiceInstance(URI serviceInstanceUri) {
return objectByUri(ServiceInstance.class, serviceInstanceUri);
}
protected <T> T objectByUri(Class<T> clazz, URI aaiResourceUri) {
return aaiClient.typedAaiGet(aaiResourceUri, clazz);
}
public Multival<ServiceInstance, Vnf> fetchRelatedVnfs(ServiceInstance serviceInstance) {
return fetchRelated("service", serviceInstance, "generic-vnf", Vnf.class);
}
public <K extends AaiModelWithRelationships> Multival<K, Network> fetchRelatedL3Networks(String sourceType, K source) {
return fetchRelated(sourceType, source, "l3-network", Network.class);
}
public Multival<Network, Vlan> fetchRelatedVlanTags(Network network) {
return fetchRelated("network", network, "vlan-tag", Vlan.class);
}
private String getServiceInstanceUri(String globalCustomerId, String serviceType, String serviceInstanceId) {
return new StrSubstitutor(ImmutableMap.of(
"global-customer-id", globalCustomerId,
"service-type", serviceType,
"service-instance-id", serviceInstanceId
)).replace(SERVICE_INSTANCE_URI_TEMPLATE);
}
private <K extends AaiModelWithRelationships, V> Multival<K, V> fetchRelated(String sourceType, K source, String destType, Class<V> destClass) {
return Multival.of(
sourceType,
source,
destType,
fetchRelatedInner(source, destType, destClass)
);
}
private <K extends AaiModelWithRelationships, V> Set<V> fetchRelatedInner(K source, String destType, Class<V> destClass) {
return getURIsOf(source, relationship -> relatedTo(relationship, destType))
.map(destUri -> objectByUri(destClass, destUri))
.collect(toSet());
}
protected Stream<URI> getURIsOf(AaiModelWithRelationships aaiModel, Predicate<Relationship> predicate) {
return aaiModel.getRelationshipList().getRelationship().stream()
.filter(predicate)
.map(r -> r.relatedLink)
.map(Unchecked::toURI);
}
protected static boolean relatedTo(Relationship r, String relationshipName) {
return relationshipName.equals(r.getRelatedTo());
}
}
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