/**
* 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.planner.fragment.contrib;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.exec.physical.base.AbstractPhysicalVisitor;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.SubScan;
/**
* Visitor to renumber operators - needed after materialization is done as some operators may be removed
* using @ExtendedMaterializerVisitor
*
*/
public class OperatorIdVisitor extends AbstractPhysicalVisitor<PhysicalOperator, Integer, ExecutionSetupException> {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(OperatorIdVisitor.class);
public static final OperatorIdVisitor INSTANCE = new OperatorIdVisitor();
private OperatorIdVisitor() {
}
@Override
public PhysicalOperator visitSubScan(SubScan subScan, Integer parentOpId) throws ExecutionSetupException {
subScan.setOperatorId(Short.MAX_VALUE & parentOpId+1);
return subScan;
}
@Override
public PhysicalOperator visitOp(PhysicalOperator op, Integer parentOpId) throws ExecutionSetupException {
for(PhysicalOperator child : op){
child.accept(this, parentOpId+1);
}
op.setOperatorId(Short.MAX_VALUE & parentOpId+1);
return op;
}
}