/*
* 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.ops;
import java.util.Iterator;
import org.apache.drill.exec.physical.base.PhysicalOperator;
/**
* Utility methods, formerly on the OperatorContext class, that work with
* operators. The utilities here are available to operators at unit test
* time, while methods in OperatorContext are available only in production
* code.
*/
public class OperatorUtilities {
private OperatorUtilities() { }
public static int getChildCount(PhysicalOperator popConfig) {
Iterator<PhysicalOperator> iter = popConfig.iterator();
int count = 0;
while (iter.hasNext()) {
iter.next();
count++;
}
if (count == 0) {
count = 1;
}
return count;
}
}