Java tutorial
/* * Copyright 2000-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.jetspeed.util; import org.apache.oro.text.perl.*; //import java.util.regex.*; import java.net.*; import org.apache.commons.lang.StringUtils; /** * <P>Data Validation functions using Regex</P> * * @author <a href="mailto:ben.woodward@bbc.co.uk">Ben Woodward</a> * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a> * @version $Id: ValidationHelper.java,v 1.4 2004/02/23 03:23:42 jford Exp $ */ public class ValidationHelper { //static string bigEmailRegex = new String("[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)*@[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)*|(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[^()<>@,;:\".\\\\\\[\\]\\x80-\\xff\\000-\\010\\012-\\037]*(?:(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[^()<>@,;:\".\\\\\\[\\]\\x80-\\xff\\000-\\010\\012-\\037]*)*<[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:@[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)*(?:,[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*@[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)*)*:[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)?(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\"[^\\\\\\x80-\\xff\\n\\015\"]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015\"]*)*\")[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*)*@[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:\\.[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\\)[\\040\\t]*)*(?:[^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff]+(?![^(\\040)<>@,;:\".\\\\\\[\\]\\000-\\037\\x80-\\xff])|\\[(?:[^\\\\\\x80-\\xff\\n\\015\\[\\]]|\\\\[^\\x80-\\xff])*\\])[\\040\\t]*(?:\\([^\\\\\\x80-\\xff\\n\\015()]*(?:(?:\\\\[^\\x80-\\xff]|\\([^\\\\\\x80-\\xff\\n\\015()]*(?:\\\\[^\\x80-\\xff][^\\\\\\x80-\\xff\\n\\015()]*)*\\))[^\\\\\\x80-\\xff\\n\\015()]*)*\)[\040\t]*)*)*>)"); //static string emailRegex = new String("/^(([^\\-][\\w\\-]*?\\.?){1,})[^-](\\@{1})([^\\-][\\w+\\.\\-])[^\\2]{1,}[^\\-]$/"); /** * Tests that the input string contains only alpha numeric or white spaces * <P> * @param evalString The string that is to be evaluated * @param required indicates whether the field is required or not * @return True if the input is alpha numeric, false otherwise. **/ public static boolean isAlphaNumeric(String evalString, boolean required) { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } Perl5Util util = new Perl5Util(); return util.match("/^[\\w\\s]+$/", evalString); } public static boolean isAlphaNumeric(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isAlphaNumeric(evalString, required); } public static boolean isLooseAlphaNumeric(String evalString, boolean required) { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } Perl5Util util = new Perl5Util(); return util.match("/^[\\w\\s\\.\\,\\/\\-\\(\\)\\+]+$/", evalString); } public static boolean isLooseAlphaNumeric(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isLooseAlphaNumeric(evalString, required); } /** * Tests that the input string contains only numeric * <P> * @param evalString The string that is to be evaluated * @return True if the input is numeric, false otherwise. **/ public static boolean isDecimal(String evalString, boolean required) { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } Perl5Util util = new Perl5Util(); return util.match("/^(\\d+\\.)?\\d+$/", evalString); } public static boolean isDecimal(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isDecimal(evalString, required); } /** * Tests that the input string contains only an integer * <P> * @param evalString The string that is to be evaluated * @return True if the input is numeric, false otherwise. **/ public static boolean isInteger(String evalString, boolean required) { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } Perl5Util util = new Perl5Util(); return util.match("/^\\d+$/", evalString); } public static boolean isInteger(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isInteger(evalString, required); } /** * Tests that the input string contains a valid email addess * <P> * @param evalString The string that is to be evaluated * @return True if the input is a valid email address. **/ public static boolean isEmailAddress(String evalString, boolean required) { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } Perl5Util util = new Perl5Util(); return util.match("/^(?:\\w[\\w-]*\\.)*\\w[\\w-]*@(?:\\w[\\w-]*\\.)+\\w[\\w-]*$/", evalString); } public static boolean isEmailAddress(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isEmailAddress(evalString, required); } /** * Tests that the input string contains a valid URL * <P> * @param evalString The string that is to be evaluated * @return True if the input is a valid URL. **/ public static boolean isURL(String evalString, boolean required) { try { if (StringUtils.isEmpty(evalString)) { if (true == required) { return false; } return true; } URL url = new URL(evalString); /* Perl5Util util = new Perl5Util(); System.out.println("looking at " +evalString); return util.match("/^[\\w%?-_~]$/", evalString); */ //Object content = url.getContent(); //System.out.println("url contains :["+content+"]"); return true; } catch (Exception e) { System.err.println(evalString + " is not a valid URL: " + e); return false; } } public static boolean isURL(String evalString, boolean required, int maxLength) { if (isTooLong(evalString, maxLength)) { return false; } return isURL(evalString, required); } public static boolean isValidIdentifier(String folderName) { boolean valid = true; char[] chars = folderName.toCharArray(); for (int ix = 0; ix < chars.length; ix++) { if (!Character.isJavaIdentifierPart(chars[ix])) { valid = false; break; } } return valid; } public static boolean isTooLong(String evalString, int maxLength) { if (null != evalString) { return (evalString.length() > maxLength); } return false; } }