/**
* Copyright 2011 Nube Technologies
*
* 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 co.nubetech.crux.server.filter;
import java.util.Comparator;
import co.nubetech.crux.model.RowAlias;
import co.nubetech.crux.model.RowAliasFilter;
/**
* This class is used to sort the row filters by the id of the RowAlias.
*
* @author sgoyal
*
*/
public class RowFilterComparator implements Comparator<RowAliasFilter> {
public int compare(RowAliasFilter filter1, RowAliasFilter filter2) {
int comparison = 0;
if (filter1 != null) {
if (filter2 != null) {
RowAlias alias1 = filter1.getRowAlias();
RowAlias alias2 = filter2.getRowAlias();
if (alias1 != null) {
if (alias2 != null) {
long id1 = alias1.getId();
long id2 = alias2.getId();
if (id1 < id2) {
comparison = -1;
} else if (id1 > id2) {
comparison = 1;
} else {
comparison = 0;
}
} else {
comparison = 1;
}
} else if (alias2 != null) {
comparison = -1;
} else {
comparison = 0;
}
} else {
comparison = 1;
}
} else if (filter2 != null) {
comparison = -1;
} else {
comparison = 0;
}
return comparison;
}
}