TraversalEmbedding.java

/*
 * Copyright © 2014 - 2021 Leipzig University (Database Research Group)
 *
 * 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.
 */
package org.gradoop.flink.representation.transactional.traversalcode;

import com.google.common.collect.Lists;
import org.gradoop.common.model.impl.id.GradoopId;

import java.util.List;

/**
 * Mapping between an embedding and a DFS code.
 */
public class TraversalEmbedding {

  /**
   * Initial vertex discovery times.
   */
  private final List<GradoopId> vertexIds;

  /**
   * Included edges.
   */
  private final List<GradoopId> edgeIds;

  /**
   * Constructor.
   *
   * @param vertexIds vertex ids
   * @param edgeIds edge ids
   */
  public TraversalEmbedding(List<GradoopId> vertexIds, List<GradoopId> edgeIds) {
    this.vertexIds = vertexIds;
    this.edgeIds = edgeIds;
  }

  /**
   * Default constructor.
   */
  public TraversalEmbedding() {
    this.vertexIds = Lists.newArrayList();
    this.edgeIds = Lists.newArrayList();
  }

  /**
   * Constructor.
   *
   * @param parent parent embedding
   */
  public TraversalEmbedding(TraversalEmbedding parent) {
    this.vertexIds = Lists.newArrayList(parent.getVertexIds());
    this.edgeIds = Lists.newArrayList(parent.getEdgeIds());
  }

  public List<GradoopId> getEdgeIds() {
    return edgeIds;
  }

  public List<GradoopId> getVertexIds() {
    return vertexIds;
  }

  @Override
  public String toString() {
    return vertexIds + ";" + edgeIds;
  }
}