VAT Id Number validators for all EU countries

pom.xml

@@ -16,7 +16,9 @@
  limitations under the License.
 -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="https://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.commons</groupId>

src/main/java/org/apache/commons/validator/routines/SireneValidator.java

@@ -0,0 +1,127 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.commons.validator.routines;
+
+import org.apache.commons.validator.GenericValidator;
+import org.apache.commons.validator.routines.checkdigit.LuhnCheckDigit;
+
+/**
+ * SIRENE (French System Information et Repertoire des Entreprise et des Etablissements) Validator.
+ *
+ * <p>
+ * International Code Designator, ICD : 0002 for SIRENE
+ * </p>
+ * <p>
+ * Issuing Organization :
+ * Institut National de la Statistique et des Etudes Economiques, (I.N.S.E.E.),
+ * Departement des Repertoires, 18, Bd Adolphe Pinard, 75675 PARIS Cedex 14
+ * </p>
+ * <p>
+ * Structure of Code :
+ * </p>
+ * <p>
+ * 1) Number of characters: 9 characters ("SIREN") 14 " 9+5 ("SIRET"),
+ * </p>
+ * <p>
+ * The 9 character number designates an organization,
+ * the 14 character number designates a specific establishment of the organization designated by the first 9 characters.
+ * </p>
+ * <p>
+ * 2) Check digits: 9th and 14th character respectively
+ * </p>
+ * <p>
+ * See <a href="https://en.wikipedia.org/wiki/SIRET_code">Wikipedia - SIRET</a> for more details.
+ * </p>
+ * @since 1.10.0
+ */
+public class SireneValidator {
+
+    final Validator formatValidator;
+
+    private static final Validator DEFAULT_FORMAT =
+     new Validator(new String[]
+       { "^(\\d{9})$"  // SIREN
+       , "^(\\d{14})$" // SIRET
+     });
+
+    private static final int SIREN_CODE_LEN = 9;
+    private static final int SIRET_CODE_LEN = 14;
+
+    /**
+     * The format validation class contains regex for SIREN and SIRET.
+     */
+    public static class Validator {
+        final RegexValidator validator;
+
+        /**
+         * Creates the format validator
+         *
+         * @param formats the regex to use to check the format
+         */
+        public Validator(final String[] formats) {
+            this.validator = new RegexValidator(formats);
+        }
+    }
+
+    /** The singleton instance which uses the default formats */
+    private static final SireneValidator DEFAULT_SIRENE_VALIDATOR = new SireneValidator();
+
+    /**
+     * Gets the singleton instance of the SIRENE validator using the default formats
+     *
+     * @return A singleton instance of the validator
+     */
+    public static SireneValidator getInstance() {
+        return DEFAULT_SIRENE_VALIDATOR;
+    }
+
+    /**
+     * Create a default format validator.
+     */
+    public SireneValidator() {
+        this.formatValidator = DEFAULT_FORMAT;
+    }
+
+    /**
+     * Validate a SIRENE-ID (SIREN or SIRET)
+     *
+     * @param code The value validation is being performed on
+     * @return <code>true</code> if the value is valid
+     */
+    public boolean isValid(final String code) {
+        if (GenericValidator.isBlankOrNull(code)) {
+            return false;
+        }
+        final String id = code.trim();
+        if (id.length() != SIREN_CODE_LEN && id.length() != SIRET_CODE_LEN) {
+            return false;
+        }
+        // format check:
+        if (!formatValidator.validator.isValid(id)) {
+            return false;
+        }
+        if (id.length() == SIREN_CODE_LEN) {
+            return LuhnCheckDigit.LUHN_CHECK_DIGIT.isValid(id);
+        }
+        if (!LuhnCheckDigit.LUHN_CHECK_DIGIT.isValid(id.substring(0, SIREN_CODE_LEN))) {
+            return false;
+        }
+        // check SIRET:
+        return LuhnCheckDigit.LUHN_CHECK_DIGIT.isValid(id);
+    }
+
+}