StringUtils.java

/*
 * gvNIX is an open source tool for rapid application development (RAD).
 * Copyright (C) 2010 Generalitat Valenciana
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.gvnix.web.menu.roo.addon.util;

/**
 * Utilities related to XML management.
 * 
 * @author <a href="http://www.disid.com">DISID Corporation S.L.</a> made for <a
 *         href="http://www.dgti.gva.es">General Directorate for Information
 *         Technologies (DGTI)</a>
 * @since 0.6
 */
public abstract class StringUtils {

    /**
     * Change to underscore <i>all</i> whitespace from the given String:
     * leading, trailing, and inbetween characters.
     * 
     * @param str the String to check
     * @return the new String
     */
    public static String underscoreAllWhitespace(String str) {
        if (str == null || str.length() == 0) {
            return str;
        }
        StringBuilder sb = new StringBuilder(str);
        int index = 0;
        while (sb.length() > index) {
            if (Character.isWhitespace(sb.charAt(index))) {
                sb.replace(index, index + 1, "_");
            }
            else {
                index++;
            }
        }
        return sb.toString();
    }
}