VertexAggregateFunction.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.model.api.functions;

import org.gradoop.flink.model.impl.operators.aggregation.Aggregation;

/**
 * Describes a vertex aggregate function as input for the {@link Aggregation} operator.
 */
public interface VertexAggregateFunction extends AggregateFunction {

  @Override
  default boolean isVertexAggregation() {
    return true;
  }

  @Override
  default boolean isEdgeAggregation() {
    return false;
  }
}