| /* |
| * 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.structure.util.reference; |
| |
| 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.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.util.ElementHelper; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| import org.apache.tinkerpop.gremlin.structure.util.Attachable; |
| |
| import java.io.Serializable; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public class ReferenceProperty<V> implements Attachable<Property<V>>, Serializable, Property<V> { |
| |
| private ReferenceElement<?> element; |
| private String key; |
| private V value; |
| |
| private ReferenceProperty() { |
| |
| } |
| |
| public Property<V> get() { |
| return this; |
| } |
| |
| public ReferenceProperty(final Property<V> property) { |
| this.element = null == property.element() ? null : ReferenceFactory.detach(property.element()); |
| this.key = property.key(); |
| this.value = property.value(); |
| } |
| |
| public ReferenceProperty(final String key, final V value) { |
| this.element = null; |
| this.key = key; |
| this.value = value; |
| } |
| |
| @Override |
| public int hashCode() { |
| return ElementHelper.hashCode(this); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.propertyString(this); |
| } |
| |
| @Override |
| public boolean equals(final Object object) { |
| return ElementHelper.areEqual(this, object); |
| } |
| |
| @Override |
| public String key() { |
| return this.key; |
| } |
| |
| @Override |
| public V value() throws NoSuchElementException { |
| return this.value; |
| } |
| |
| @Override |
| public boolean isPresent() { |
| return true; |
| } |
| |
| @Override |
| public Element element() { |
| return this.element; |
| } |
| |
| @Override |
| public void remove() { |
| throw Property.Exceptions.propertyRemovalNotSupported(); |
| } |
| } |