| /* |
| * 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.traversal.step.map; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; |
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequirement; |
| import org.apache.tinkerpop.gremlin.structure.Element; |
| import org.apache.tinkerpop.gremlin.structure.PropertyType; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public class PropertiesStep<E> extends FlatMapStep<Element, E> { |
| |
| protected final String[] propertyKeys; |
| protected final PropertyType returnType; |
| |
| public PropertiesStep(final Traversal.Admin traversal, final PropertyType propertyType, final String... propertyKeys) { |
| super(traversal); |
| this.returnType = propertyType; |
| this.propertyKeys = propertyKeys; |
| } |
| |
| @Override |
| protected Iterator<E> flatMap(final Traverser.Admin<Element> traverser) { |
| return this.returnType.equals(PropertyType.VALUE) ? |
| traverser.get().values(this.propertyKeys) : |
| (Iterator) traverser.get().properties(this.propertyKeys); |
| } |
| |
| public PropertyType getReturnType() { |
| return this.returnType; |
| } |
| |
| public String[] getPropertyKeys() { |
| return this.propertyKeys; |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.stepString(this, Arrays.asList(this.propertyKeys), this.returnType.name().toLowerCase()); |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = super.hashCode() ^ this.returnType.hashCode(); |
| for (final String propertyKey : this.propertyKeys) { |
| result ^= propertyKey.hashCode(); |
| } |
| return result; |
| } |
| |
| @Override |
| public Set<TraverserRequirement> getRequirements() { |
| return Collections.singleton(TraverserRequirement.OBJECT); |
| } |
| } |