2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.aai.query.builder;
22 import org.apache.tinkerpop.gremlin.process.traversal.Step;
23 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
24 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
25 import org.apache.tinkerpop.gremlin.structure.Vertex;
26 import org.onap.aai.exceptions.AAIException;
27 import org.onap.aai.introspection.Introspector;
28 import org.onap.aai.introspection.Loader;
29 import org.onap.aai.parsers.query.QueryParser;
30 import org.onap.aai.parsers.query.TraversalStrategy;
31 import org.onap.aai.edges.enums.EdgeType;
33 import javax.ws.rs.core.MultivaluedMap;
34 import java.io.UnsupportedEncodingException;
36 import java.util.List;
39 * The Class TraversalQuery.
41 public class TraversalQuery<E> extends GraphTraversalBuilder<E> {
44 * Instantiates a new traversal query.
46 * @param loader the loader
48 public TraversalQuery(Loader loader, GraphTraversalSource source) {
49 super(loader, source);
50 this.factory = new TraversalStrategy(this.loader, this);
54 * Instantiates a new traversal query.
56 * @param loader the loader
57 * @param start the start
59 public TraversalQuery(Loader loader, GraphTraversalSource source, Vertex start) {
60 super(loader, source, start);
61 this.factory = new TraversalStrategy(this.loader, this);
64 protected TraversalQuery(GraphTraversal<Vertex, E> traversal, Loader loader, GraphTraversalSource source, GraphTraversalBuilder<E> gtb) {
65 super(loader, source);
66 this.traversal = traversal;
67 this.stepIndex = gtb.getStepIndex();
68 this.parentStepIndex = gtb.getParentStepIndex();
69 this.containerStepIndex = gtb.getContainerStepIndex();
70 this.factory = new TraversalStrategy(this.loader, this);
71 this.start = gtb.getStart();
78 public QueryParser createQueryFromURI(URI uri) throws UnsupportedEncodingException, AAIException {
79 return factory.buildURIParser(uri);
86 public QueryParser createQueryFromRelationship(Introspector relationship) throws UnsupportedEncodingException, AAIException {
87 return factory.buildRelationshipParser(relationship);
94 public QueryParser createQueryFromURI(URI uri, MultivaluedMap<String, String> queryParams)
95 throws UnsupportedEncodingException, AAIException {
96 return factory.buildURIParser(uri, queryParams);
103 public QueryParser createQueryFromObjectName(String objName) {
104 return factory.buildObjectNameParser(objName);
111 public QueryBuilder<E> newInstance(Vertex start) {
112 return new TraversalQuery<>(loader, source, start);
119 public QueryBuilder<E> newInstance() {
120 return new TraversalQuery<>(loader, source);
124 protected QueryBuilder<E> cloneQueryAtStep(int index) {
125 GraphTraversal.Admin<Vertex, E> cloneAdmin = getCloneAdmin(index);
126 return new TraversalQuery<>(cloneAdmin, loader, source, this);
129 protected GraphTraversal.Admin<Vertex, E> getCloneAdmin(int index) {
136 GraphTraversal<Vertex, E> clone = this.traversal.asAdmin().clone();
137 GraphTraversal.Admin<Vertex, E> cloneAdmin = clone.asAdmin();
138 List<Step> steps = cloneAdmin.getSteps();
140 for (int i = steps.size()-1; i >= idx; i--) {
141 cloneAdmin.removeStep(i);
147 protected QueryBuilder<E> removeQueryStepsBetween(int start, int end) {
148 GraphTraversal<Vertex, E> clone = this.traversal.asAdmin().clone();
149 GraphTraversal.Admin<Vertex, E> cloneAdmin = clone.asAdmin();
151 for (int i = end-2; i >= start; i--) {
152 cloneAdmin.removeStep(i);
154 return new TraversalQuery<>(cloneAdmin, loader, source, this);