WW-3952 Adds implementation of credit card validator

core/src/main/java/com/opensymphony/xwork2/validator/validators/CreditCardValidator.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2002-2006,2009 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 com.opensymphony.xwork2.validator.validators;
+
+
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * CreditCardFieldValidator checks that a given String/Array/Collection field,
+ * if not empty, is a valid credit card number.
+ */
+public class CreditCardValidator extends RegexFieldValidator {
+
+    public static final String CREDIT_CARD_PATTERN =
+                    "^(?:4[0-9]{12}(?:[0-9]{3})?" + // Visa
+                    "|(?:5[1-5][0-9]{2}" + // MasterCard
+                    "|222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}" +
+                    "|3[47][0-9]{13}" + // American Express
+                    "|3(?:0[0-5]|[68][0-9])[0-9]{11}" + // Diners Club
+                    "|6(?:011|5[0-9]{2})[0-9]{12}" + // Discover
+                    "|(?:2131|1800|35\\d{3})\\d{11}" + // JCB
+                    ")$";
+
+    public CreditCardValidator() {
+        setRegex(CREDIT_CARD_PATTERN);
+        setCaseSensitive(false);
+    }
+
+    protected void validateFieldValue(Object object, String value, String regexToUse) {
+        super.validateFieldValue(object, StringUtils.deleteWhitespace(value), regexToUse);
+    }
+
+}