/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.explain.std;
import com.foundationdb.qp.operator.API;
import com.foundationdb.qp.operator.Operator;
import com.foundationdb.qp.rowtype.RowType;
import com.foundationdb.server.explain.*;
public class SortOperatorExplainer extends CompoundExplainer
{
public SortOperatorExplainer (String name, API.SortOption sortOption, RowType sortType, Operator inputOp, API.Ordering ordering, ExplainContext context)
{
super(Type.SORT, buildMap(name, sortOption, sortType, inputOp, ordering, context));
}
private static Attributes buildMap (String name, API.SortOption sortOption, RowType sortType, Operator inputOp, API.Ordering ordering, ExplainContext context)
{
Attributes map = new Attributes();
map.put(Label.NAME, PrimitiveExplainer.getInstance(name));
map.put(Label.SORT_OPTION, PrimitiveExplainer.getInstance(sortOption.name()));
map.put(Label.ROWTYPE, sortType.getExplainer(context));
map.put(Label.INPUT_OPERATOR, inputOp.getExplainer(context));
for (int i = 0; i < ordering.sortColumns(); i++)
{
map.put(Label.EXPRESSIONS, ordering.expression(i).getExplainer(context));
map.put(Label.ORDERING, PrimitiveExplainer.getInstance(ordering.ascending(i) ? "ASC" : "DESC"));
}
return map;
}
}