Tokenizer


1   /*
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
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
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.
16   *
17   */
18  package org.apache.tools.ant.util;
19  
20  import java.io.Reader  ;
21  import java.io.IOException  ;
22  
23  /**
24   * input stream tokenizers implement this interface
25   *
26   * @version Ant 1.6
27   */
28  public interface Tokenizer {
29      /**
30       * get the next token from the input stream
31       * @param in the input stream
32       * @return the next token, or null for the end
33       *         of the stream
34       * @throws IOException if an error occurs
35       */
36      String   getToken(Reader   in) throws IOException  ;
37  
38      /**
39       * return the string between tokens, after the
40       * previous token.
41       * @return the intra-token string
42       */
43      String   getPostToken();
44  }
45

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