| /* |
| * 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.Reader; |
| |
| |
| /** Internal class to enable reuse of the string reader by {@link Analyzer#tokenStream(String,String)} */ |
| final class ReusableStringReader extends Reader { |
| private int pos = 0, size = 0; |
| private String s = null; |
| |
| void setValue(String s) { |
| this.s = s; |
| this.size = s.length(); |
| this.pos = 0; |
| } |
| |
| @Override |
| public int read() { |
| if (pos < size) { |
| return s.charAt(pos++); |
| } else { |
| s = null; |
| return -1; |
| } |
| } |
| |
| @Override |
| public int read(char[] c, int off, int len) { |
| if (pos < size) { |
| len = Math.min(len, size-pos); |
| s.getChars(pos, pos+len, c, off); |
| pos += len; |
| return len; |
| } else { |
| s = null; |
| return -1; |
| } |
| } |
| |
| @Override |
| public void close() { |
| pos = size; // this prevents NPE when reading after close! |
| s = null; |
| } |
| } |