/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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 org.drools.examples.sudoku;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
/**
* Abstract base class for all kinds of groups of related cells.
*/
public abstract class CellGroup extends SetOfNine {
public static final Set<Integer> ALL_NINE = new CopyOnWriteArraySet<Integer>();
static {
for (int i = 1; i <= 9; i++) ALL_NINE.add(i);
}
private List<Cell> cells = new ArrayList<Cell>();
/**
* Constructor.
*/
protected CellGroup() {
super();
}
/**
* Add another Cell object to the cells of this group.
* @param cell a Cell object.
*/
public void addCell(Cell cell) {
cells.add(cell);
}
/**
* Returns the Cell objects in this group.
* @return a List of Cell objects.
*/
public List<Cell> getCells() {
return cells;
}
}