content: /*
   * Copyright 2009-2018, Acciente LLC
   *
   * Acciente LLC 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 com.acciente.oacc.normalizer.jdk;
  
  import com.acciente.oacc.normalizer.TextNormalizer;
  
  import java.nio.CharBuffer;
  import java.text.Normalizer;
  
  public class JDKTextNormalizer extends TextNormalizer {
     // we use the singleton holder pattern to lazy initialize the singleton instance
     // in a thread safe manner without the need for any explicit locking
     // (see https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom).
     private static class LazyInitSingletonHolder {
        private static final TextNormalizer INSTANCE = new JDKTextNormalizer();
     }
  
     private JDKTextNormalizer() {
     }
  
     public static TextNormalizer getInstance() {
        return LazyInitSingletonHolder.INSTANCE;
     }
  
     @Override
     public char[] normalizeToNfc(char[] source) {
        return Normalizer.normalize(CharBuffer.wrap(source), Normalizer.Form.NFC).toCharArray();
     }
  }
  