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/*
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 * and Distribution License("CDDL") (collectively, the "License").  You
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 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package com.sun.enterprise.module.impl;

import com.sun.enterprise.module.ModuleDependency;
import com.sun.enterprise.module.Module;
import com.sun.enterprise.module.ModulesRegistry;

import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author dochez
 */
public class Utils {
    
    /** Creates a new instance of Utils */
    private Utils() {
    }

    public static void identifyCyclicDependency(ModuleImpl m, Logger logger) {

        StringBuffer tree = new StringBuffer();
        tree.append(m.getName());
        Vector traversed = new Vector();
        boolean success = traverseAndFind(m, m, traversed);
        if (success) {
            traversed.remove(0);
            for (Module mod : traversed) {
                tree.append("-->" + mod.getName());
            }
            tree.append("-->" + m.getName());
        logger.log(Level.SEVERE, "Cyclic dependency : " + tree.toString());
        }
    }

    static private boolean traverseAndFind(Module toTraverse, ModuleImpl toFind, Vector traversed) {

        traversed.add(toTraverse);
        for (ModuleDependency md : toTraverse.getModuleDefinition().getDependencies())  {
            ModulesRegistry registry = toTraverse.getRegistry();
            for (Module mod : registry.getModules()) {
                if (mod.getName().equals(md.getName())) {
                    if (mod!=null) {
                        if (mod.getName().equals(toFind.getName())) {
                            return true;
                        }
                        if (traverseAndFind(mod, toFind, traversed)) {
                            return true;
                        }
                    }

                }
            }
        }
        traversed.remove(toTraverse);
        return false;
    }
}