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/*
 * 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.drill.common.logical.data;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonTypeName;
import org.apache.drill.common.logical.data.visitors.LogicalVisitor;

/**
 * Implementation of {@link LogicalOperator} for {@code MetadataAggRel} rel node.
 */
@JsonTypeName("metadataAggregate")
public class MetadataAggregate extends SingleInputOperator {

  @JsonCreator
  public MetadataAggregate() {
  }

  @Override
  public  T accept(LogicalVisitor logicalVisitor, X value) throws E {
    throw new UnsupportedOperationException("MetadataAggregate does not support visitors");
  }
}