content: /**
   * 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.lucene.analysis;
  
  import java.io.IOException;
  import java.io.Reader;
  
  /**
   * CharReader is a Reader wrapper. It reads chars from
   * Reader and outputs {@link CharStream}, defining an
   * identify function {@link #correctOffset} method that
   * simply returns the provided offset.
   */
  public final class CharReader extends CharStream {
  
    private final Reader input;
    
    public static CharStream get(Reader input) {
      return input instanceof CharStream ?
        (CharStream)input : new CharReader(input);
    }
  
    private CharReader(Reader in) {
      input = in;
    }
  
    @Override
    public int correctOffset(int currentOff) {
      return currentOff;
    }
  
    @Override
    public void close() throws IOException {
      input.close();
    }
  
    @Override
    public int read(char[] cbuf, int off, int len) throws IOException {
      return input.read(cbuf, off, len);
    }
  
    @Override
    public boolean markSupported(){
      return input.markSupported();
    }
  
    @Override
    public void mark( int readAheadLimit ) throws IOException {
      input.mark(readAheadLimit);
    }
  
    @Override
    public void reset() throws IOException {
      input.reset();
    }
  }
  