/**
* 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.store;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.expr.TypeHelper;
import org.apache.drill.exec.memory.BufferAllocator;
import org.apache.drill.exec.physical.impl.OutputMutator;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.apache.drill.exec.record.MaterializedField;
import org.apache.drill.exec.record.VectorContainer;
import org.apache.drill.exec.record.VectorWrapper;
import org.apache.drill.exec.vector.ValueVector;
import com.google.common.collect.Maps;
public class TestOutputMutator implements OutputMutator, Iterable<VectorWrapper<?>> {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TestOutputMutator.class);
private final VectorContainer container = new VectorContainer();
private final Map<MaterializedField, ValueVector> fieldVectorMap = Maps.newHashMap();
private final BufferAllocator allocator;
public TestOutputMutator(BufferAllocator allocator){
this.allocator = allocator;
}
public void removeField(MaterializedField field) throws SchemaChangeException {
ValueVector vector = fieldVectorMap.remove(field);
if (vector == null)
throw new SchemaChangeException("Failure attempting to remove an unknown field.");
container.remove(vector);
vector.close();
}
public void addField(ValueVector vector) {
container.add(vector);
fieldVectorMap.put(vector.getField(), vector);
}
public void addFields(List<ValueVector> v) {
return;
}
public Iterator<VectorWrapper<?>> iterator() {
return container.iterator();
}
public void clear(){
}
@Override
public boolean isNewSchema() {
return false;
}
@Override
public void allocate(int recordCount) {
return;
}
@Override
public <T extends ValueVector> T addField(MaterializedField field, Class<T> clazz) throws SchemaChangeException {
ValueVector v = TypeHelper.getNewVector(field, allocator);
if(!clazz.isAssignableFrom(v.getClass())) throw new SchemaChangeException(String.format("The class that was provided %s does not correspond to the expected vector type of %s.", clazz.getSimpleName(), v.getClass().getSimpleName()));
addField(v);
return (T) v;
}
}