##### Coverage Report - org.apache.any23.mime.purifier.WhiteSpacesPurifier

Classes in this File | Line Coverage | Branch Coverage | Complexity
WhiteSpacesPurifier |
0% | 0/13
0% | 0/18
| 5.5;5.5

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.any23.mime.purifier;
19 |  |
20 |  |
     import java.io.IOException;
21 |  |
     import java.io.InputStream;
22 |  |
23 |  |
     /**
24 |  |
      * Implementation of {@link Purifier} that removes all the eventual blank
25 |  |
      * characters at the header of a file that might prevents its <i>MIME Type</i> detection.
26 |  |
      *
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      * @author Davide Palmisano ( dpalmisano@gmail.com )
28 |  |
      */
29 | 0 |
     public class WhiteSpacesPurifier implements Purifier {
30 |  |
31 |  |
         /**
32 |  |
          * {@inheritDoc}
33 |  |
          */
34 |  |
         public void purify(InputStream inputStream) throws IOException {
35 | 0 |
             if(!inputStream.markSupported())
36 | 0 |
                 throw new IllegalArgumentException("Provided InputStream does not support marks");
37 |  |
38 |  |
             // mark the current position
39 | 0 |
             inputStream.mark(Integer.MAX_VALUE);
40 | 0 |
             int byteRead = inputStream.read();
41 | 0 |
             char charRead = (char) byteRead;
42 | 0 |
             while(isBlank(charRead) && (byteRead != -1)) {
43 |  |
                 // if here means that the previos character must be removed, so mark.
44 | 0 |
                 inputStream.mark(Integer.MAX_VALUE);
45 | 0 |
                 byteRead = inputStream.read();
46 | 0 |
                 charRead = (char) byteRead;
47 |  |
             }
48 |  |
             // if exit go back to the last valid mark.
49 | 0 |
             inputStream.reset();
50 | 0 |
         }
51 |  |
52 |  |
         private boolean isBlank(char c) {
53 | 0 |
             return c == '\t' || c == '\n' || c == ' ' || c == '\r' || c == '\b' || c == '\f';
54 |  |
         }
55 |  |
     }