001/*
002 * #%L
003 * GwtMaterial
004 * %%
005 * Copyright (C) 2015 - 2016 GwtMaterialDesign
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 * 
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 * 
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package gwt.material.design.client.data;
021
022import java.util.Comparator;
023
024/**
025 * @author Ben Dol
026 */
027public class DataSort<M> implements Comparator<M> {
028    private SortDir direction;
029    private final Comparator<? super M> comparator;
030
031    public DataSort(Comparator<? super M> itemComparator, SortDir direction) {
032        this.comparator = itemComparator;
033        this.direction = direction;
034    }
035
036    @Override
037    public int compare(M o1, M o2) {
038        int val = comparator.compare(o1, o2);
039        return direction == SortDir.ASC ? val : -val;
040    }
041
042    /**
043     * Returns the current sort direction for this sort info.
044     */
045    public SortDir getDirection() {
046        return direction;
047    }
048
049    /**
050     * Sets a new sort direction.
051     */
052    public void setDirection(SortDir direction) {
053        this.direction = direction;
054    }
055}