| /* |
| * 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.neo4j.structure; |
| |
| import org.apache.tinkerpop.gremlin.structure.Element; |
| import org.apache.tinkerpop.gremlin.structure.Graph; |
| 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.ElementHelper; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| import org.neo4j.tinkerpop.api.Neo4jNode; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class Neo4jVertexProperty<V> implements VertexProperty<V> { |
| |
| protected final Neo4jVertex vertex; |
| protected final String key; |
| protected final V value; |
| protected Neo4jNode vertexPropertyNode; |
| |
| public Neo4jVertexProperty(final Neo4jVertex vertex, final String key, final V value) { |
| this.vertex = vertex; |
| this.key = key; |
| this.value = value; |
| this.vertexPropertyNode = null; |
| } |
| |
| public Neo4jVertexProperty(final Neo4jVertex vertex, final String key, final V value, final Neo4jNode vertexPropertyNode) { |
| this.vertex = vertex; |
| this.key = key; |
| this.value = value; |
| this.vertexPropertyNode = vertexPropertyNode; |
| } |
| |
| public Neo4jVertexProperty(final Neo4jVertex vertex, final Neo4jNode vertexPropertyNode) { |
| this.vertex = vertex; |
| this.key = (String) vertexPropertyNode.getProperty(T.key.getAccessor()); |
| this.value = (V) vertexPropertyNode.getProperty(T.value.getAccessor()); |
| this.vertexPropertyNode = vertexPropertyNode; |
| } |
| |
| @Override |
| public Vertex element() { |
| return this.vertex; |
| } |
| |
| @Override |
| public Object id() { |
| // TODO: Neo4j needs a better ID system for VertexProperties |
| return (long) (this.key.hashCode() + this.value.hashCode() + this.vertex.id().hashCode()); |
| } |
| |
| @Override |
| public String key() { |
| return this.key; |
| } |
| |
| @Override |
| public V value() throws NoSuchElementException { |
| return this.value; |
| } |
| |
| @Override |
| public boolean isPresent() { |
| return null != this.value; |
| } |
| |
| @Override |
| public <U> Iterator<Property<U>> properties(final String... propertyKeys) { |
| throw VertexProperty.Exceptions.metaPropertiesNotSupported(); |
| } |
| |
| @Override |
| public <U> Property<U> property(final String key, final U value) { |
| throw VertexProperty.Exceptions.metaPropertiesNotSupported(); |
| } |
| |
| @Override |
| public void remove() { |
| this.vertex.graph.tx().readWrite(); |
| final Neo4jNode node = ((Neo4jVertex) element()).getBaseVertex(); |
| if (node.hasProperty(key)) node.removeProperty(key); |
| this.vertexPropertyNode= null; |
| } |
| |
| @Override |
| public Set<String> keys() { |
| if(null == this.vertexPropertyNode) return Collections.emptySet(); |
| final Set<String> keys = new HashSet<>(); |
| for (final String key : this.vertexPropertyNode.getKeys()) { |
| if (!Graph.Hidden.isHidden(key) && !key.equals(this.key)) |
| keys.add(key); |
| } |
| return Collections.unmodifiableSet(keys); |
| } |
| |
| @Override |
| public boolean equals(final Object object) { |
| return ElementHelper.areEqual(this, object); |
| } |
| |
| @Override |
| public int hashCode() { |
| return ElementHelper.hashCode((Element) this); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.propertyString(this); |
| } |
| } |