| /* |
| * 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.tinkerpop.gremlin.process.computer.traversal.lambda; |
| |
| import org.apache.tinkerpop.gremlin.process.computer.traversal.TraversalVertexProgram; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; |
| import org.apache.tinkerpop.gremlin.process.traversal.lambda.AbstractLambdaTraversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.util.TraverserSet; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.VertexProperty; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class HaltedTraversersCountTraversal extends AbstractLambdaTraversal<Vertex, Long> { |
| |
| private Long count; |
| |
| @Override |
| public Long next() { |
| return this.count; |
| } |
| |
| @Override |
| public void addStart(final Traverser.Admin<Vertex> start) { |
| final VertexProperty<TraverserSet<Object>> property = start.get().<TraverserSet<Object>>property(TraversalVertexProgram.HALTED_TRAVERSERS); |
| this.count = property.isPresent() ? property.value().bulkSize() : 0l; |
| } |
| |
| @Override |
| public String toString() { |
| return "count(" + TraversalVertexProgram.HALTED_TRAVERSERS + ")"; |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.getClass().hashCode(); |
| } |
| } |