/**
* diqube: Distributed Query Base.
*
* Copyright (C) 2015 Bastian Gloeckle
*
* This file is part of diqube.
*
* diqube 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 org.diqube.optimize;
import java.util.Map;
import java.util.UUID;
import org.diqube.diql.request.ExecutionRequest;
/**
* Executes general optimizations on an {@link ExecutionRequest}.
*
* @author Bastian Gloeckle
*/
public class ExecutionRequestOptimizer {
private ExecutionRequest request;
private WhereNotOptimizer whereNotOptimizer = new PushToLeafsWhereNotOptimizer();
/**
* @param request
* The {@link ExecutionRequest} that should be optimized. This object will be changed when calling
* {@link #optimize()}!
*/
public ExecutionRequestOptimizer(ExecutionRequest request) {
this.request = request;
}
/**
* Optimizes the {@link ExecutionRequest} provided in the constructor and returns that optimized object.
*/
public ExecutionRequest optimize() {
if (request.getWhere() != null) {
Map<UUID, OptimizerComparisonInfo> info =
new OptimizerComparisonInfoBuilder().withComparisonRequest(request.getWhere()).build();
optimizeWhereNot(info);
}
return request;
}
private ExecutionRequest optimizeWhereNot(Map<UUID, OptimizerComparisonInfo> info) {
request.setWhere(whereNotOptimizer.optimize(request.getWhere(), info));
return request;
}
}