org.apache.tinkerpop.gremlin.arcadedb.structure.ArcadeVertexProperty Maven / Gradle / Ivy

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/*
 * Copyright © 2021-present Arcade Data Ltd ([email protected])
 *
 * Licensed 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.
 *
 * SPDX-FileCopyrightText: 2021-present Arcade Data Ltd ([email protected])
 * SPDX-License-Identifier: Apache-2.0
 */
package org.apache.tinkerpop.gremlin.arcadedb.structure;

import com.arcadedb.graph.MutableVertex;
import org.apache.tinkerpop.gremlin.structure.Element;
import org.apache.tinkerpop.gremlin.structure.Property;
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 java.util.*;

/**
 * Created by Enrico Risa on 30/07/2018.
 */
public class ArcadeVertexProperty implements VertexProperty {

  protected final String       key;
  protected final T            value;
  protected final ArcadeVertex vertex;

  protected ArcadeVertexProperty(final ArcadeVertex vertex, final String key, final T value) {
    this.vertex = vertex;
    this.key = key;
    this.value = value;
  }

  @Override
  public String key() {
    return key;
  }

  @Override
  public T value() throws NoSuchElementException {
    return value;
  }

  @Override
  public boolean isPresent() {
    return value != null;
  }

  @Override
  public Vertex element() {
    return vertex;
  }

  @Override
  public void remove() {
    graph().tx().readWrite();

    final MutableVertex mutableElement = vertex.baseElement.modify();
    mutableElement.remove(key);
    mutableElement.save();

    if (mutableElement != vertex.baseElement)
      // REPLACE WITH MUTABLE ELEMENT
      vertex.baseElement = mutableElement;

  }

  @Override
  public Object id() {
    return (long) (this.key.hashCode() + this.value.hashCode() + this.vertex.id().hashCode());
  }

  @Override
  public  Property property(final String key, final V value) {
    throw new UnsupportedOperationException();
  }

  /**
   * Not supported.
   */
  @Override
  public  Iterator> properties(final String... propertyKeys) {
    return Collections.emptyIterator();
  }

  @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);
  }
}