BAEL-6626 (#14345)
* BALE-6626 Check If a String Contains Non-Alphanumeric Characters in Java * Move patterns to class level. --------- Co-authored-by: parthiv39731 <parthiv39731@gmail.com>
This commit is contained in:
parthiv39731
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de3fc4f21a
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package com.baeldung.nonalphanumeric;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class NonAlphaNumRegexChecker {
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private static final Pattern PATTERN_NON_ALPHNUM_ANYLANG = Pattern.compile("[^\\p{IsAlphabetic}\\p{IsDigit}]");
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private static final Pattern PATTERN_NON_ALPHNUM_USASCII = Pattern.compile("[^a-zA-Z0-9]+");
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/**
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* checks if a non-alphanumeric character is present. this method would return true if
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* it comes across a non english or non US-ASCII letter
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*
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* @param str - String to check for special character
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* @return true if special character found else false
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*/
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public static boolean isNonAlphanumeric(String str) {
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// Pattern pattern = Pattern.compile("\\W"); //same as [^a-zA-Z0-9]+
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// Pattern pattern = Pattern.compile("[^a-zA-Z0-9||\\s]+"); //ignores space
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Matcher matcher = PATTERN_NON_ALPHNUM_USASCII.matcher(str);
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return matcher.find();
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}
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/**
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* Checks for non-alphanumeric characters from all language scripts
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*
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* @param input - String to check for special character
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* @return true if special character found else false
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*/
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public static boolean containsNonAlphanumeric(String input) {
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// Pattern pattern = Pattern.compile("[^\\p{Alnum}]", Pattern.UNICODE_CHARACTER_CLASS); //Binary properties
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Matcher matcher = PATTERN_NON_ALPHNUM_ANYLANG.matcher(input);
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return matcher.find();
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}
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/**
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* checks for non-alphanumeric character. it returns true if it detects any character other than the
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* specified script argument. example of script - Character.UnicodeScript.GEORGIAN.name()
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*
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* @param input - String to check for special character
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* @param script - language script
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* @return true if special character found else false
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*/
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public static boolean containsNonAlphanumeric(String input, String script) {
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String regexScriptClass = "\\p{" + "Is" + script + "}";
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Pattern pattern = Pattern.compile("[^" + regexScriptClass + "\\p{IsDigit}]"); //Binary properties
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Matcher matcher = pattern.matcher(input);
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return matcher.find();
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}
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}
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package com.baeldung.nonalphanumeric;
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import org.apache.commons.lang3.StringUtils;
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public class NonAlphaNumericChecker {
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/**
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* Checks for non-alphanumeric characters in any Unicode Script
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* @param str - String to check for special characters
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* @return true if special character found else false
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*/
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public static boolean isNonAlphanumericAnyLangScript(String str) {
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for (int i = 0; i < str.length(); i++) {
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char c = str.charAt(i);
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if (!Character.isLetterOrDigit(c)) {
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return true;
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}
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}
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return false;
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}
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/**
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* checks for special characters,returns false if any character
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* found other than the script argument
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* @param str - String to check for special characters
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* @param script - Language script
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* @return true if special character found else false
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*/
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public static boolean isNonAlphanumericInLangScript(String str, String script) {
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for (int i = 0; i < str.length(); i++) {
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char c = str.charAt(i);
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// script e.g., Character.UnicodeScript.of(c).toString().equalsIgnoreCase(Character.UnicodeScript.LATIN.toString())
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if (!Character.UnicodeScript.of(c).toString().equalsIgnoreCase(script)
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&& !Character.isDigit(c)) {
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return true;
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}
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}
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return false;
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}
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/**
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* checks for special characters in any lang
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* @param str - String to check for special characters
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* @return true if special character found else false
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*/
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public static boolean isNonAlphanumericAnyLangScriptV2(String str) {
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return !StringUtils.isAlphanumeric(str);
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}
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}
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package com.baeldung.nonalphanumeric;
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import org.junit.Test;
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import static org.junit.Assert.*;
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public class NonAlphaNumRegexCheckerUnitTest {
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@Test
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public void whenStrLatinOrHasNonAlphaNum_ThenRetTrue() {
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//alphabets with special character
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String str1 = "W$nder^ful";
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//digits with special character
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String str2 = "123$%45";
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//alphabets and digits with special characters
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String str3 = "W@nd$r123$%45";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumRegexChecker.isNonAlphanumeric(str1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumRegexChecker.isNonAlphanumeric(str2));
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assertTrue(ERROR_MSG + str3, NonAlphaNumRegexChecker.isNonAlphanumeric(str3));
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}
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@Test
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public void whenStrLatinOrHasNoNonAlphaNum_ThenRetFalse() {
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//only alphabets
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String str1 = "Wonderful";
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//only digits
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String str2 = "12345";
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//mix of alphabet and digit
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String str3 = "5Won6der1234";
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//Error message
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String ERROR_MSG = "Test failed, non alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumRegexChecker.isNonAlphanumeric(str1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumRegexChecker.isNonAlphanumeric(str2));
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assertFalse(ERROR_MSG + str3, NonAlphaNumRegexChecker.isNonAlphanumeric(str3));
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}
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@Test
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public void whenStrNonLatinOrHasNonAlphaNum_ThenRetTrue() {
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//special character in Georgian text
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String str1 = "##მშვენიერი@";
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//special character with Turkish text
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String str2 = "müthiş#$";
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//No special character in Georgian text
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String str3 = "მშვენიერი";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumRegexChecker.isNonAlphanumeric(str1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumRegexChecker.isNonAlphanumeric(str2));
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assertTrue(ERROR_MSG + str3, NonAlphaNumRegexChecker.isNonAlphanumeric(str3));
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}
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@Test
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public void whenStrAnyLangOrHasNonAlphaNum_ThenRetTrue() {
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//special character in Georgian text
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String str1 = "##მშვენიერი@";
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//special character with Turkish text
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String str2 = "müthiş#$";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumRegexChecker.containsNonAlphanumeric(str1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumRegexChecker.containsNonAlphanumeric(str2));
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}
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@Test
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public void whenStrAnyLangOrHasNoNonAlphaNum_ThenRetFalse() {
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//Georgian text with no special char
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String str1 = "მშვენიერი";
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//Turkish text with no special char
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String str2 = "müthiş";
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//Latin text with no special char
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String str3 = "Wonderful";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumRegexChecker.containsNonAlphanumeric(str1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumRegexChecker.containsNonAlphanumeric(str2));
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assertFalse(ERROR_MSG + str3, NonAlphaNumRegexChecker.containsNonAlphanumeric(str3));
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}
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@Test
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public void givenLang_whenStrHasDiffLangOrHasNonAlphaNum_ThenRetTrue() {
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String script1 = Character.UnicodeScript.MYANMAR.name(); //script used for Burmese Lang
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//text in Burmese with special char
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String str1 = "အံ့ဩ%စ##ရာ";
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//special character and english char in Burmese
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String str2 = "အံ့ADFဩစ%ရာ*^";
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//English character in Burmese
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String str3 = "အံ့ဩစTရာWon";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumRegexChecker.containsNonAlphanumeric(str1, script1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumRegexChecker.containsNonAlphanumeric(str2, script1));
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assertTrue(ERROR_MSG + str3, NonAlphaNumRegexChecker.containsNonAlphanumeric(str3, script1));
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}
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@Test
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public void givenLang_whenStrHasSameLangOrHasNoNonAlphaNum_ThenRetFalse() {
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String script1 = Character.UnicodeScript.MYANMAR.name(); //script used for Burmese Lang
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String script2 = Character.UnicodeScript.GREEK.name();
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//text in Burmese
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String str1 = "အံ့ဩစရာ";
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//text in Greek
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String str2 = "Εκπληκτικός";
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//Error message
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String ERROR_MSG = "Test failed, alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumRegexChecker.containsNonAlphanumeric(str1, script1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumRegexChecker.containsNonAlphanumeric(str2, script2));
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}
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}
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package com.baeldung.nonalphanumeric;
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import org.junit.Test;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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public class NonAlphaNumericCheckerUnitTest {
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@Test
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public void whenStrLatinOrHasNonAlphaNum_ThenRetTrue() {
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String latin = Character.UnicodeScript.LATIN.name();
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//alphabets with special character
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String str1 = "W$nder^ful";
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//digits with special character
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String str2 = "123$%45";
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//alphabets and digits with special characters
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String str3 = "W@nd$r123$%45";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str1, latin));
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assertTrue(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str2, latin));
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assertTrue(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str3, latin));
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}
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@Test
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public void whenStrLatinOrHasNoNonAlphaNum_ThenRetFalse() {
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String latin = Character.UnicodeScript.LATIN.name();
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//only alphabets
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String str1 = "Wonderful";
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//only digits
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String str2 = "12345";
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//mix of alphabet and digit
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String str3 = "5Won6der1234";
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//Error message
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String ERROR_MSG = "Test failed, non alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str1, latin));
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assertFalse(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str2, latin));
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assertFalse(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str3, latin));
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}
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@Test
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public void whenStrNonLatinOrHasNonAlphaNum_ThenRetTrue() {
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String latin = Character.UnicodeScript.LATIN.name();
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//special character in Georgian text
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String str1 = "##მშვენიერი@";
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//special character with Turkish text
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String str2 = "müthiş#$";
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//No special character in Georgian text
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String str3 = "მშვენიერი";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str1, latin));
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assertTrue(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str2, latin));
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assertTrue(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str3, latin));
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}
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@Test
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public void whenStrAnyLangOrHasNonAlphaNum_ThenRetTrue() {
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//special character in Georgian text
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String str1 = "##მშვენიერი@";
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//special character with Turkish text
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String str2 = "müthiş#$";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericAnyLangScript(str1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericAnyLangScript(str2));
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}
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@Test
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public void whenStrAnyLangOrHasNoNonAlphaNum_ThenRetFalse() {
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//Georgian text with no special char
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String str1 = "მშვენიერი";
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//Turkish text with no special char
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String str2 = "müthiş";
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//Latin text with no special char
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String str3 = "Wonderful";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericAnyLangScript(str1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericAnyLangScript(str2));
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assertFalse(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericAnyLangScript(str3));
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}
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@Test
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public void givenLang_whenStrHasDiffLangOrHasNonAlphaNum_ThenRetTrue() {
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String script1 = Character.UnicodeScript.MYANMAR.name(); //script used for Burmese Lang
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//text in Burmese with special char
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String str1 = "အံ့ဩ%စ##ရာ";
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//special character and english char in Burmese
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String str2 = "အံ့ADFဩစ%ရာ*^";
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//English character in Burmese
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String str3 = "အံ့ဩစTရာWon";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str1, script1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str2, script1));
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assertTrue(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str3, script1));
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}
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@Test
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public void givenLang_whenStrHasSameLangOrHasNoNonAlphaNum_ThenRetFalse() {
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String script1 = Character.UnicodeScript.MYANMAR.name(); //script used for Burmese Lang
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String script2 = Character.UnicodeScript.GREEK.name();
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//text in Burmese
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String str1 = "အံ့ဩစရာ";
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//text in Greek
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String str2 = "Εκπληκτικός";
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//Error message
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String ERROR_MSG = "Test failed, alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str1, script1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericInLangScript(str2, script2));
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}
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@Test
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public void givenComLangImpl_whenStrAnyLangOrHasNonAlphaNum_ThenRetTrue() {
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//special character in Georgian text
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String str1 = "##მშვენიერი@";
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//special character with Turkish text
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String str2 = "müthiş#$";
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//Error message
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String ERROR_MSG = "Test failed, no alphanumeric char found in ";
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assertTrue(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str1));
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assertTrue(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str2));
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}
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@Test
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public void givenComLangImpl_whenStrAnyLangOrHasNoNonAlphaNum_ThenRetFalse() {
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//Georgian text with no special char
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String str1 = "მშვენიერი";
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//Turkish text with no special char
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String str2 = "müthiş";
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//Latin text with no special char
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String str3 = "Wonderful";
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//Burmese in Myanmar script
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// String str4 = "အံ့ဩစရာ";
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//only digits
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String str5 = "3465";
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//Error message
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String ERROR_MSG = "Test failed, alphanumeric char found in ";
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assertFalse(ERROR_MSG + str1, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str1));
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assertFalse(ERROR_MSG + str2, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str2));
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assertFalse(ERROR_MSG + str3, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str3));
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//StringUtils.isAlphanumeric is unable to support supplementary unicode character and hence fails
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//assertFalse(ERROR_MSG + str4, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str4));
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assertFalse(ERROR_MSG + str5, NonAlphaNumericChecker.isNonAlphanumericAnyLangScriptV2(str5));
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}
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}
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