1 package org.apache.lucene.analysis.fa;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
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20 import java.io.IOException;
22 import org.apache.lucene.analysis.CharStream;
23 import org.apache.lucene.analysis.CharFilter;
26 * CharFilter that replaces instances of Zero-width non-joiner with an
29 public class PersianCharFilter extends CharFilter {
31 public PersianCharFilter(CharStream in) {
36 public int read(char[] cbuf, int off, int len) throws IOException {
37 final int charsRead = super.read(cbuf, off, len);
39 final int end = off + charsRead;
41 if (cbuf[off] == '\u200C')