/**
 * 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.exec.physical.base;

import java.util.Iterator;
import java.util.List;

import com.google.common.collect.Iterators;

/**
 * Describes an operator that expects more than one children operators as its input.
 */
public abstract class AbstractMultiple extends AbstractBase{
  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(AbstractMultiple.class);

  protected final List<PhysicalOperator> children;

  protected AbstractMultiple(List<PhysicalOperator> children) {
    this.children = children;
  }

  public List<PhysicalOperator> getChildren() {
    return children;
  }

  @Override
  public Iterator<PhysicalOperator> iterator() {
    return children.iterator();
  }


}