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/*
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 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
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 * "License"). You may not use this file except in compliance with the
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package org.netbeans.modules.j2ee.ddloaders.ejb;

import org.netbeans.modules.schema2beans.BaseBean;
import org.netbeans.modules.j2ee.dd.api.common.CommonDDBean;
import org.netbeans.modules.j2ee.dd.impl.ejb.EjbJarProxy;


/**
 *
 * @author  mkuchtiak
 */
public class EjbJarDDUtils {
     private EjbJarDDUtils() {}

    /** Finds a name similar to requested that uniquely identifies
     *  element between the other elements of the same name.
     *
     * @param elements checked elements
     * @param identifier name of tag that contains identification value
     * @return a free element name
     */
    public static String findFreeName (CommonDDBean[] elements, String identifier, String name) {
        if (checkFreeName (elements, identifier, name)) {
            return name;
        }
        for (int i = 1;;i++) {
            String destName = name + "_"+i; // NOI18N
            if (checkFreeName (elements, identifier, destName)) {
                return destName;
            }
        }
    }
    
    /** Test if given name is free in given context.
     * @param elements checked elements
     * @param identifier name of tag that contains identification value
     * @param o object to be checked
     * @return true, if such name does not exists
     */
    private static boolean checkFreeName (CommonDDBean [] elements, String identifier, Object o) {
        for (int i=0; i<elements.length; i++) {
            Object val = elements[i].getValue (identifier);
            if (val != null && val.equals (o)) {
                return false;
            }
        }
        return true;
    }

    /**  Convenient method for getting the BaseBean object from CommonDDBean object
    */
    public static BaseBean getBaseBean(CommonDDBean bean) {
        if (bean instanceof BaseBean) return (BaseBean)bean;
        else if (bean instanceof EjbJarProxy) return (BaseBean) ((EjbJarProxy)bean).getOriginal();
        return null;
    }
}
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