+++ /dev/null
-/**
- * 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;
-
-/**
- * Subclasses of CharFilter can be chained to filter CharStream.
- * They can be used as {@link java.io.Reader} with additional offset
- * correction. {@link Tokenizer}s will automatically use {@link #correctOffset}
- * if a CharFilter/CharStream subclass is used.
- */
-public abstract class CharFilter extends CharStream {
-
- protected CharStream input;
-
- protected CharFilter(CharStream in) {
- input = in;
- }
-
- /**
- * Subclass may want to override to correct the current offset.
- *
- * @param currentOff current offset
- * @return corrected offset
- */
- protected int correct(int currentOff) {
- return currentOff;
- }
-
- /**
- * Chains the corrected offset through the input
- * CharFilter.
- */
- @Override
- public final int correctOffset(int currentOff) {
- return input.correctOffset(correct(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();
- }
-}