LanguageCode.java

/**
 * **********************************************************************
 *
 * <p>DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 *
 * <p>Copyright 2008, 2010 Oracle and/or its affiliates. All rights reserved.
 *
 * <p>Use is subject to license terms.
 *
 * <p>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. You can also obtain a copy of the License at
 * http://odftoolkit.org/docs/license.txt
 *
 * <p>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.
 *
 * <p>See the License for the specific language governing permissions and limitations under the
 * License.
 *
 * <p>**********************************************************************
 */
package org.odftoolkit.odfdom.type;

import java.util.regex.Pattern;

/** This class represents the in OpenDocument format used data type {@odf.datatype languageCode} */
public class LanguageCode implements OdfDataType {

  private String mLanguageCode;
  private static final Pattern languageCodePattern = Pattern.compile("^[A-Za-z]{1,8}$");

  /**
   * Construct LanguageCode by the parsing the given string
   *
   * @param languageCode The String to be parsed into LanguageCode
   * @throws IllegalArgumentException if the given argument is not a valid langageCode
   */
  public LanguageCode(String languageCode) throws IllegalArgumentException {
    if (!isValid(languageCode)) {
      throw new IllegalArgumentException("parameter is invalid for datatype LanguageCode");
    }

    // validate 'LanguageCode' type which is defined in W3C schema
    // http://www.w3.org/TR/xmlschema-2/#token
    if (!W3CSchemaType.isValid("token", languageCode)) {
      throw new IllegalArgumentException("parameter is invalid for datatype LanguageCode");
    }
    mLanguageCode = languageCode;
  }

  /**
   * Returns a String Object representing this LanguageCode's value
   *
   * @return return a string representation of the value of this LanguageCode object
   */
  @Override
  public String toString() {
    return mLanguageCode;
  }

  /**
   * Returns a LanguageCode instance representing the specified String value
   *
   * @param stringValue a String value
   * @return return a LanguageCode instance representing stringValue
   * @throws IllegalArgumentException if the given argument is not a valid LanguageCode
   */
  public static LanguageCode valueOf(String stringValue) throws IllegalArgumentException {
    return new LanguageCode(stringValue);
  }

  /**
   * check if the specified String instance is a valid {@odf.datatype languageCode} data type
   *
   * @param stringValue the value to be tested
   * @return true if the value of argument is valid for {@odf.datatype languageCode} data type false
   *     otherwise
   */
  public static boolean isValid(String stringValue) {
    if (stringValue == null || !languageCodePattern.matcher(stringValue).matches()) {
      return true;
    } else {
      return W3CSchemaType.isValid("token", stringValue);
    }
  }
}