| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.algebricks.core.algebra.properties; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Set; |
| |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| |
| public class LocalGroupingProperty extends AbstractGroupingProperty implements ILocalStructuralProperty { |
| |
| // preferredOrderEnforcer, if not null, is guaranteed to enforce grouping on |
| // columnSet |
| private List<LogicalVariable> preferredOrderEnforcer; |
| |
| public LocalGroupingProperty(Set<LogicalVariable> columnSet) { |
| super(columnSet); |
| } |
| |
| public LocalGroupingProperty(Set<LogicalVariable> columnSet, List<LogicalVariable> preferredOrderEnforcer) { |
| this(columnSet); |
| this.preferredOrderEnforcer = preferredOrderEnforcer; |
| } |
| |
| @Override |
| public PropertyType getPropertyType() { |
| return PropertyType.LOCAL_GROUPING_PROPERTY; |
| } |
| |
| @Override |
| public void getColumns(Collection<LogicalVariable> columns) { |
| columns.addAll(columnSet); |
| } |
| |
| @Override |
| public String toString() { |
| return columnSet.toString(); |
| } |
| |
| @Override |
| public void getVariables(Collection<LogicalVariable> variables) { |
| variables.addAll(columnSet); |
| } |
| |
| public List<LogicalVariable> getPreferredOrderEnforcer() { |
| return preferredOrderEnforcer; |
| } |
| } |