| /* |
| * 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.sideEffect; |
| |
| 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.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Element; |
| import org.apache.tinkerpop.gremlin.structure.Property; |
| import org.apache.tinkerpop.gremlin.structure.T; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.VertexProperty; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| import org.apache.tinkerpop.gremlin.structure.util.keyed.KeyedProperty; |
| import org.apache.tinkerpop.gremlin.structure.util.keyed.KeyedVertexProperty; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public class AddPropertyStep<S extends Element> extends SideEffectStep<S> |
| implements Mutating<Event.ElementPropertyChangedEvent>, TraversalParent, Scoping { |
| |
| private Parameters parameters = new Parameters(); |
| private final VertexProperty.Cardinality cardinality; |
| private CallbackRegistry<Event.ElementPropertyChangedEvent> callbackRegistry; |
| |
| public AddPropertyStep(final Traversal.Admin traversal, final VertexProperty.Cardinality cardinality, final Object keyObject, final Object valueObject) { |
| super(traversal); |
| this.parameters.set(this, T.key, keyObject, T.value, valueObject); |
| this.cardinality = cardinality; |
| } |
| |
| @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 void sideEffect(final Traverser.Admin<S> traverser) { |
| final String key = (String) this.parameters.get(traverser, T.key, () -> { |
| throw new IllegalStateException("The AddPropertyStep does not have a provided key: " + this); |
| }).get(0); |
| final Object value = this.parameters.get(traverser, T.value, () -> { |
| throw new IllegalStateException("The AddPropertyStep does not have a provided value: " + this); |
| }).get(0); |
| final Object[] vertexPropertyKeyValues = this.parameters.getKeyValues(traverser, T.key, T.value); |
| |
| final Element element = traverser.get(); |
| |
| if (this.callbackRegistry != null) { |
| getTraversal().getStrategies().getStrategy(EventStrategy.class) |
| .ifPresent(eventStrategy -> { |
| Event.ElementPropertyChangedEvent evt = null; |
| if (element instanceof Vertex) { |
| final VertexProperty.Cardinality cardinality = this.cardinality != null |
| ? this.cardinality |
| : element.graph().features().vertex().getCardinality(key); |
| |
| if (cardinality == VertexProperty.Cardinality.list) { |
| evt = new Event.VertexPropertyChangedEvent(eventStrategy.detach((Vertex) element), |
| new KeyedVertexProperty(key), value, vertexPropertyKeyValues); |
| } |
| else if (cardinality == VertexProperty.Cardinality.set) { |
| Property currentProperty = null; |
| final Iterator<? extends Property> properties = traverser.get().properties(key); |
| while (properties.hasNext()) { |
| final Property property = properties.next(); |
| if (Objects.equals(property.value(), value)) { |
| currentProperty = property; |
| break; |
| } |
| } |
| evt = new Event.VertexPropertyChangedEvent(eventStrategy.detach((Vertex) element), |
| currentProperty == null ? |
| new KeyedVertexProperty(key) : |
| eventStrategy.detach((VertexProperty) currentProperty), value, vertexPropertyKeyValues); |
| } |
| } |
| if (evt == null) { |
| final Property currentProperty = traverser.get().property(key); |
| final boolean newProperty = element instanceof Vertex ? currentProperty == VertexProperty.empty() : currentProperty == Property.empty(); |
| if (element instanceof Vertex) |
| evt = new Event.VertexPropertyChangedEvent(eventStrategy.detach((Vertex) element), |
| newProperty ? |
| new KeyedVertexProperty(key) : |
| eventStrategy.detach((VertexProperty) currentProperty), value, vertexPropertyKeyValues); |
| else if (element instanceof Edge) |
| evt = new Event.EdgePropertyChangedEvent(eventStrategy.detach((Edge) element), |
| newProperty ? |
| new KeyedProperty(key) : |
| eventStrategy.detach(currentProperty), value); |
| else if (element instanceof VertexProperty) |
| evt = new Event.VertexPropertyPropertyChangedEvent(eventStrategy.detach((VertexProperty) element), |
| newProperty ? |
| new KeyedProperty(key) : |
| eventStrategy.detach(currentProperty), value); |
| else |
| throw new IllegalStateException(String.format("The incoming object cannot be processed by change eventing in %s: %s", AddPropertyStep.class.getName(), element)); |
| } |
| final Event.ElementPropertyChangedEvent event = evt; |
| this.callbackRegistry.getCallbacks().forEach(c -> c.accept(event)); |
| }); |
| } |
| |
| if (null != this.cardinality) |
| ((Vertex) element).property(this.cardinality, key, value, vertexPropertyKeyValues); |
| else if (vertexPropertyKeyValues.length > 0) |
| ((Vertex) element).property(key, value, vertexPropertyKeyValues); |
| else |
| element.property(key, value); |
| } |
| |
| @Override |
| public Set<TraverserRequirement> getRequirements() { |
| return this.getSelfAndChildRequirements(TraverserRequirement.OBJECT); |
| } |
| |
| @Override |
| public CallbackRegistry<Event.ElementPropertyChangedEvent> getMutatingCallbackRegistry() { |
| if (null == this.callbackRegistry) this.callbackRegistry = new ListCallbackRegistry<>(); |
| return this.callbackRegistry; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int hash = super.hashCode() ^ this.parameters.hashCode(); |
| return (null != this.cardinality) ? (hash ^ cardinality.hashCode()) : hash; |
| } |
| |
| @Override |
| public void setTraversal(final Traversal.Admin<?, ?> parentTraversal) { |
| super.setTraversal(parentTraversal); |
| this.parameters.getTraversals().forEach(this::integrateChild); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.stepString(this, this.parameters); |
| } |
| |
| @Override |
| public AddPropertyStep<S> clone() { |
| final AddPropertyStep<S> clone = (AddPropertyStep<S>) super.clone(); |
| clone.parameters = this.parameters.clone(); |
| return clone; |
| } |
| } |