1 /**
2 * This file Copyright (c) 2015-2018 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.config.source.yaml;
35
36 import java.io.FilterReader;
37 import java.io.IOException;
38 import java.io.Reader;
39
40 /**
41 * Transforms all whitespace chars into ASCII 20 space.
42 * Extending FilterReader possibly voids any optimization in the underlying Reader (all read() methods in FilterReader are redirected to the one we override here), but allows us to centralize our "cleaning" filter.
43 */
44 class WhiteSpaceNormalisingReader extends FilterReader {
45 WhiteSpaceNormalisingReader(Reader reader) {
46 super(reader);
47 }
48
49 @Override
50 public int read(char[] cbuf, int offset, int len) throws IOException {
51 int charsRead = super.read(cbuf, offset, len);
52 if (charsRead == -1) {
53 return -1;
54 }
55 for (int i = offset; i < offset + charsRead; i++) {
56 char c = cbuf[i];
57 if (Character.isSpaceChar(c)) {
58 cbuf[i] = ' ';
59 }
60 }
61 return charsRead;
62 }
63
64 }