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Diffstat (limited to 'src/main/java/org/onap/aai/rest/search/GenericQueryProcessor.java')
-rw-r--r-- | src/main/java/org/onap/aai/rest/search/GenericQueryProcessor.java | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/main/java/org/onap/aai/rest/search/GenericQueryProcessor.java b/src/main/java/org/onap/aai/rest/search/GenericQueryProcessor.java new file mode 100644 index 0000000..2431d11 --- /dev/null +++ b/src/main/java/org/onap/aai/rest/search/GenericQueryProcessor.java @@ -0,0 +1,226 @@ +/** + * ============LICENSE_START======================================================= + * org.onap.aai + * ================================================================================ + * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============LICENSE_END========================================================= + */ +package org.onap.aai.rest.search; + +import org.apache.tinkerpop.gremlin.process.traversal.P; +import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal; +import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__; +import org.apache.tinkerpop.gremlin.structure.Graph; +import org.apache.tinkerpop.gremlin.structure.Vertex; +import org.javatuples.Pair; +import org.onap.aai.exceptions.AAIException; +import org.onap.aai.rest.dsl.DslQueryProcessor; +import org.onap.aai.restcore.search.GroovyQueryBuilderSingleton; +import org.onap.aai.restcore.util.URITools; +import org.onap.aai.serialization.engines.TransactionalGraphEngine; +import org.onap.aai.serialization.queryformats.SubGraphStyle; + +import javax.ws.rs.core.MultivaluedHashMap; +import javax.ws.rs.core.MultivaluedMap; +import java.io.FileNotFoundException; +import java.net.URI; +import java.util.*; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +public abstract class GenericQueryProcessor { + + protected final Optional<URI> uri; + protected final MultivaluedMap<String, String> queryParams; + protected final Optional<Collection<Vertex>> vertices; + protected static Pattern p = Pattern.compile("query/(.*+)"); + protected Optional<String> gremlin; + protected final TransactionalGraphEngine dbEngine; + protected static GroovyQueryBuilderSingleton queryBuilderSingleton = GroovyQueryBuilderSingleton.getInstance(); + protected final boolean isGremlin; + protected Optional<DslQueryProcessor> dslQueryProcessorOptional; + /* dsl parameters to store dsl query and to check + * if this is a DSL request + */ + protected Optional<String> dsl; + protected final boolean isDsl ; + + protected GenericQueryProcessor(Builder builder) { + this.uri = builder.getUri(); + this.dbEngine = builder.getDbEngine(); + this.vertices = builder.getVertices(); + this.gremlin = builder.getGremlin(); + this.isGremlin = builder.isGremlin(); + this.dsl = builder.getDsl(); + this.isDsl = builder.isDsl(); + this.dslQueryProcessorOptional = builder.getDslQueryProcessor(); + + if (uri.isPresent()) { + queryParams = URITools.getQueryMap(uri.get()); + } else { + queryParams = new MultivaluedHashMap<>(); + } + } + + protected abstract GraphTraversal<?,?> runQuery(String query, Map<String, Object> params); + + protected List<Object> processSubGraph(SubGraphStyle style, GraphTraversal<?,?> g) { + final List<Object> resultVertices = new Vector<>(); + g.store("y"); + + if (SubGraphStyle.prune.equals(style) || SubGraphStyle.star.equals(style)) { + g.barrier().bothE(); + if (SubGraphStyle.prune.equals(style)) { + g.where(__.otherV().where(P.within("y"))); + } + g.dedup().subgraph("subGraph").cap("subGraph").map(x -> (Graph)x.get()).next().traversal().V().forEachRemaining(x -> { + resultVertices.add(x); + }); + } else { + resultVertices.addAll(g.toList()); + } + return resultVertices; + } + + public List<Object> execute(SubGraphStyle style) throws FileNotFoundException, AAIException { + final List<Object> resultVertices; + + Pair<String, Map<String, Object>> tuple = this.createQuery(); + String query = tuple.getValue0(); + Map<String, Object> params = tuple.getValue1(); + + if (query.equals("") && (vertices.isPresent() && vertices.get().isEmpty())) { + //nothing to do, just exit + return new ArrayList<>(); + } + GraphTraversal<?,?> g = this.runQuery(query, params); + + resultVertices = this.processSubGraph(style, g); + + return resultVertices; + } + + protected Pair<String, Map<String, Object>> createQuery() throws AAIException { + Map<String, Object> params = new HashMap<>(); + String query = ""; + if (this.isGremlin) { + query = gremlin.get(); + + }else if (this.isDsl) { + String dslUserQuery = dsl.get(); + if(dslQueryProcessorOptional.isPresent()){ + String dslQuery = dslQueryProcessorOptional.get().parseAaiQuery(dslUserQuery); + query = queryBuilderSingleton.executeTraversal(dbEngine, dslQuery, params); + String startPrefix = "g.V()"; + query = startPrefix + query; + } + } + + return new Pair<>(query, params); + } + + public static class Builder { + + private final TransactionalGraphEngine dbEngine; + private Optional<URI> uri = Optional.empty(); + private Optional<String> gremlin = Optional.empty(); + private boolean isGremlin = false; + private Optional<Collection<Vertex>> vertices = Optional.empty(); + private QueryProcessorType processorType = QueryProcessorType.GREMLIN_SERVER; + + private Optional<String> dsl = Optional.empty(); + private boolean isDsl = false; + private DslQueryProcessor dslQueryProcessor; + + public Builder(TransactionalGraphEngine dbEngine) { + this.dbEngine = dbEngine; + } + + public Builder queryFrom(URI uri) { + this.uri = Optional.of(uri); + this.isGremlin = false; + return this; + } + + public Builder startFrom(Collection<Vertex> vertices) { + this.vertices = Optional.of(vertices); + return this; + } + + public Builder queryFrom( String query, String queryType) { + + if(queryType.equals("gremlin")){ + this.gremlin = Optional.of(query); + this.isGremlin = true; + } + if(queryType.equals("dsl")){ + this.dsl = Optional.of(query); + this.isDsl = true; + } + return this; + } + + public Builder processWith(QueryProcessorType type) { + this.processorType = type; + return this; + } + + public Builder queryProcessor(DslQueryProcessor dslQueryProcessor){ + this.dslQueryProcessor = dslQueryProcessor; + return this; + } + + public Optional<DslQueryProcessor> getDslQueryProcessor(){ + return Optional.ofNullable(this.dslQueryProcessor); + } + + public TransactionalGraphEngine getDbEngine() { + return dbEngine; + } + + public Optional<URI> getUri() { + return uri; + } + + public Optional<String> getGremlin() { + return gremlin; + } + + public boolean isGremlin() { + return isGremlin; + } + + public Optional<String> getDsl() { + return dsl; + } + + public boolean isDsl() { + return isDsl; + } + + public Optional<Collection<Vertex>> getVertices() { + return vertices; + } + + public QueryProcessorType getProcessorType() { + return processorType; + } + + public GenericQueryProcessor create() { + return new GroovyShellImpl(this); + } + + } +} |