/* Copyright (c) 2001-2002, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */package net.jumperz.ext.org.hsqldb.lib;/** * @version 1.7.0 */public class StringUtil {    private StringUtil() {}/** * Returns a string with non alphanumeric chars converted to the * substitute character. A digit first character is also converted. * By sqlbob@users * @param source string to convert * @param substitute character to use * @return converted string */    public static String toLowerSubset(String source, char substitute) {        int          len = source.length();        StringBuffer src = new StringBuffer(len);        char         ch;        for (int i = 0; i < len; i++) {            ch = source.charAt(i);            if (!Character.isLetterOrDigit(ch)) {                src.append(substitute);            } else if ((i == 0) && Character.isDigit(ch)) {                src.append(substitute);            } else {                src.append(Character.toLowerCase(ch));            }        }        return src.toString();    }    /**     * Builds a CSV list from the String[].     *     * @param s  array of String objects     * @return a CSV list     */    public static String getList(String[] s, String separator, String quote) {        StringBuffer b = new StringBuffer(s.length * 16);        for (int i = 0; i < s.length; i++) {            b.append(quote);            b.append(s[i]);            b.append(quote);            b.append(separator);        }        b.setLength(b.length() - separator.length());        return b.toString();    }    /**     * Builds a CSV list from the int[].     *     * @param i array of int     * @return a CSV list     */    public static String getList(int[] s, String separator, String quote) {        StringBuffer b = new StringBuffer(s.length * 8);        for (int i = 0; i < s.length; i++) {            b.append(quote);            b.append(s[i]);            b.append(quote);            b.append(separator);        }        b.setLength(b.length() - separator.length());        return b.toString();    }    /**     * Builds a CSV list from the specified String[][].     * Uses only the first element in each subarray.     *     *     * @param s the array of array of String objects     * @return a CSV list     */    public static String getList(String[][] s, String separator,                                 String quote) {        StringBuffer b = new StringBuffer(s.length * 16);        for (int i = 0; i < s.length; i++) {            b.append(quote);            b.append(s[i][0]);            b.append(quote);            b.append(separator);        }        b.setLength(b.length() - separator.length());        return b.toString();    }}