| /* |
| * 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.step.Mutating; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.Scoping; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalParent; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.Parameters; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.CallbackRegistry; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.Event; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.ListCallbackRegistry; |
| import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.EventStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequirement; |
| import org.apache.tinkerpop.gremlin.structure.T; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class AddVertexStep<S> extends ScalarMapStep<S, Vertex> |
| implements Mutating<Event.VertexAddedEvent>, TraversalParent, Scoping { |
| |
| private Parameters parameters = new Parameters(); |
| private CallbackRegistry<Event.VertexAddedEvent> callbackRegistry; |
| |
| public AddVertexStep(final Traversal.Admin traversal, final String label) { |
| super(traversal); |
| this.parameters.set(this, T.label, null == label ? Vertex.DEFAULT_LABEL : label); |
| } |
| |
| public AddVertexStep(final Traversal.Admin traversal, final Traversal.Admin<S,String> vertexLabelTraversal) { |
| super(traversal); |
| this.parameters.set(this, T.label, vertexLabelTraversal); |
| } |
| |
| @Override |
| public Parameters getParameters() { |
| return this.parameters; |
| } |
| |
| @Override |
| public Set<String> getScopeKeys() { |
| return this.parameters.getReferencedLabels(); |
| } |
| |
| @Override |
| public <S, E> List<Traversal.Admin<S, E>> getLocalChildren() { |
| return this.parameters.getTraversals(); |
| } |
| |
| @Override |
| public void configure(final Object... keyValues) { |
| this.parameters.set(this, keyValues); |
| } |
| |
| @Override |
| protected Vertex map(final Traverser.Admin<S> traverser) { |
| final Vertex vertex = this.getTraversal().getGraph().get().addVertex(this.parameters.getKeyValues(traverser)); |
| if (this.callbackRegistry != null) { |
| final EventStrategy eventStrategy = getTraversal().getStrategies().getStrategy(EventStrategy.class).get(); |
| final Event.VertexAddedEvent vae = new Event.VertexAddedEvent(eventStrategy.detach(vertex)); |
| this.callbackRegistry.getCallbacks().forEach(c -> c.accept(vae)); |
| } |
| return vertex; |
| } |
| |
| @Override |
| public CallbackRegistry<Event.VertexAddedEvent> getMutatingCallbackRegistry() { |
| if (null == callbackRegistry) callbackRegistry = new ListCallbackRegistry<>(); |
| return callbackRegistry; |
| } |
| |
| @Override |
| public int hashCode() { |
| return super.hashCode() ^ this.parameters.hashCode(); |
| } |
| |
| @Override |
| public Set<TraverserRequirement> getRequirements() { |
| return this.getSelfAndChildRequirements(); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.stepString(this, this.parameters); |
| } |
| |
| @Override |
| public void setTraversal(final Traversal.Admin<?, ?> parentTraversal) { |
| super.setTraversal(parentTraversal); |
| this.parameters.getTraversals().forEach(this::integrateChild); |
| } |
| |
| @Override |
| public AddVertexStep<S> clone() { |
| final AddVertexStep<S> clone = (AddVertexStep<S>) super.clone(); |
| clone.parameters = this.parameters.clone(); |
| return clone; |
| } |
| } |