/*
* Licensed 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 com.facebook.presto.sql.planner;
import com.facebook.presto.split.SplitSource;
import com.facebook.presto.sql.planner.plan.OutputNode;
import com.facebook.presto.sql.planner.plan.PlanNodeId;
import com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
public class StageExecutionPlan
{
private final PlanFragment fragment;
private final Map<PlanNodeId, SplitSource> splitSources;
private final List<StageExecutionPlan> subStages;
private final Optional<List<String>> fieldNames;
public StageExecutionPlan(
PlanFragment fragment,
Map<PlanNodeId, SplitSource> splitSources,
List<StageExecutionPlan> subStages)
{
this.fragment = requireNonNull(fragment, "fragment is null");
this.splitSources = requireNonNull(splitSources, "dataSource is null");
this.subStages = ImmutableList.copyOf(requireNonNull(subStages, "dependencies is null"));
fieldNames = (fragment.getRoot() instanceof OutputNode) ?
Optional.of(ImmutableList.copyOf(((OutputNode) fragment.getRoot()).getColumnNames())) :
Optional.empty();
}
public List<String> getFieldNames()
{
checkState(fieldNames.isPresent(), "cannot get field names from non-output stage");
return fieldNames.get();
}
public PlanFragment getFragment()
{
return fragment;
}
public Map<PlanNodeId, SplitSource> getSplitSources()
{
return splitSources;
}
public List<StageExecutionPlan> getSubStages()
{
return subStages;
}
public StageExecutionPlan withBucketToPartition(Optional<int[]> bucketToPartition)
{
return new StageExecutionPlan(fragment.withBucketToPartition(bucketToPartition), splitSources, subStages);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("fragment", fragment)
.add("splitSources", splitSources)
.add("subStages", subStages)
.toString();
}
}