/*
* MX Cheminformatics Tools for Java
*
* Copyright (c) 2007, 2008 Metamolecular, LLC
*
* http://metamolecular.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.chemhack.jsMolEditor.client.path;
import com.chemhack.jsMolEditor.client.model.Atom;
import java.util.ArrayList;
import java.util.List;
/**
* @author Richard L. Apodaca
*/
public class PathFinder {
private List<List<Atom>> paths;
public PathFinder() {
paths = new ArrayList<List<Atom>>();
}
public List<List<Atom>> findAllPaths(Atom atom) {
Step step = new DefaultStep(atom);
paths.clear();
walk(step);
return paths;
}
public void walk(Step step) {
if (!step.hasNextBranch()) {
paths.add(new ArrayList<Atom>(step.getPath()));
return;
}
while (step.hasNextBranch()) {
Atom next = step.nextBranch();
if (step.isBranchFeasible(next)) {
walk(step.nextStep(next));
step.backTrack();
}
}
}
}