2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 package org.apache.lucene.analysis;
20 import java.io.IOException;
21 import java.io.Reader;
24 * CharReader is a Reader wrapper. It reads chars from
25 * Reader and outputs {@link CharStream}, defining an
26 * identify function {@link #correctOffset} method that
27 * simply returns the provided offset.
29 public final class CharReader extends CharStream {
31 private final Reader input;
33 public static CharStream get(Reader input) {
34 return input instanceof CharStream ?
35 (CharStream)input : new CharReader(input);
38 private CharReader(Reader in) {
43 public int correctOffset(int currentOff) {
48 public void close() throws IOException {
53 public int read(char[] cbuf, int off, int len) throws IOException {
54 return input.read(cbuf, off, len);
58 public boolean markSupported(){
59 return input.markSupported();
63 public void mark( int readAheadLimit ) throws IOException {
64 input.mark(readAheadLimit);
68 public void reset() throws IOException {