/**
* 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.ref.rops;
import java.io.IOException;
import org.apache.drill.common.logical.data.Scan;
import org.apache.drill.exec.ref.IteratorRegistry;
import org.apache.drill.exec.ref.RecordIterator;
import org.apache.drill.exec.ref.RunOutcome.OutcomeType;
import org.apache.drill.exec.ref.exceptions.SetupException;
import org.apache.drill.exec.ref.rse.RecordReader;
import org.apache.drill.exec.ref.rse.ReferenceStorageEngine;
import org.apache.drill.exec.ref.rse.ReferenceStorageEngine.ReadEntry;
public class ScanROP extends ROPBase<Scan>{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ScanROP.class);
private ReadEntry entry;
private ReferenceStorageEngine engine;
private RecordReader reader;
public ScanROP(Scan config, ReadEntry entry, ReferenceStorageEngine engine) {
super(config);
this.entry = entry;
this.engine = engine;
}
@Override
protected void setupIterators(IteratorRegistry registry) throws SetupException {
try{
super.setupIterators(registry);
reader = engine.getReader(entry, this);
reader.setup();
}catch(IOException e){
throw new SetupException(String.format("Failure while setting up reader for Entry %s.", entry), e);
}
}
@Override
protected RecordIterator getIteratorInternal() {
return reader.getIterator();
}
@Override
public void cleanup(OutcomeType outcome) {
reader.cleanup();
super.cleanup(outcome);
}
}