| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| package org.apache.hugegraph.api.traversers; |
| |
| import static org.apache.hugegraph.traversal.algorithm.HugeTraverser.DEFAULT_LIMIT; |
| |
| import java.util.Iterator; |
| |
| import org.apache.hugegraph.HugeGraph; |
| import org.apache.hugegraph.api.graph.VertexAPI; |
| import org.apache.hugegraph.backend.id.Id; |
| import org.apache.hugegraph.core.GraphManager; |
| import org.apache.hugegraph.structure.HugeVertex; |
| import org.apache.hugegraph.traversal.algorithm.EdgeExistenceTraverser; |
| import org.apache.hugegraph.util.E; |
| import org.apache.hugegraph.util.Log; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.slf4j.Logger; |
| |
| import com.codahale.metrics.annotation.Timed; |
| |
| import io.swagger.v3.oas.annotations.Operation; |
| import io.swagger.v3.oas.annotations.tags.Tag; |
| import jakarta.inject.Singleton; |
| import jakarta.ws.rs.DefaultValue; |
| import jakarta.ws.rs.GET; |
| import jakarta.ws.rs.Path; |
| import jakarta.ws.rs.PathParam; |
| import jakarta.ws.rs.Produces; |
| import jakarta.ws.rs.QueryParam; |
| import jakarta.ws.rs.core.Context; |
| |
| @Path("graphs/{graph}/traversers/edgeexist") |
| @Singleton |
| @Tag(name = "EdgeExistenceAPI") |
| public class EdgeExistenceAPI extends TraverserAPI { |
| |
| private static final Logger LOG = Log.logger(EdgeExistenceAPI.class); |
| private static final String DEFAULT_EMPTY = ""; |
| |
| @GET |
| @Timed |
| @Produces(APPLICATION_JSON_WITH_CHARSET) |
| @Operation(summary = "get edges from 'source' to 'target' vertex") |
| public String get(@Context GraphManager manager, |
| @PathParam("graph") String graph, |
| @QueryParam("source") String source, |
| @QueryParam("target") String target, |
| @QueryParam("label") String edgeLabel, |
| @QueryParam("sort_values") |
| @DefaultValue(DEFAULT_EMPTY) String sortValues, |
| @QueryParam("limit") |
| @DefaultValue(DEFAULT_LIMIT) long limit) { |
| LOG.debug("Graph [{}] get edgeExistence with " + |
| "source '{}', target '{}', edgeLabel '{}', sortValue '{}', limit '{}'", |
| graph, source, target, edgeLabel, sortValues, limit); |
| |
| E.checkArgumentNotNull(source, "The source can't be null"); |
| E.checkArgumentNotNull(target, "The target can't be null"); |
| |
| Id sourceId = VertexAPI.checkAndParseVertexId(source); |
| Id targetId = VertexAPI.checkAndParseVertexId(target); |
| HugeGraph hugegraph = graph(manager, graph); |
| EdgeExistenceTraverser traverser = new EdgeExistenceTraverser(hugegraph); |
| Iterator<Edge> edges = traverser.queryEdgeExistence(sourceId, targetId, edgeLabel, |
| sortValues, limit); |
| |
| return manager.serializer(hugegraph).writeEdges(edges, false); |
| } |
| } |