1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2024 the original author or authors.
4 //
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Lesser General Public
7 // License as published by the Free Software Foundation; either
8 // version 2.1 of the License, or (at your option) any later version.
9 //
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ///////////////////////////////////////////////////////////////////////////////////////////////
19
20 package com.puppycrawl.tools.checkstyle.utils;
21
22 import java.io.IOException;
23 import java.io.InputStream;
24
25 import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
26
27 /**
28 * Utility methods for suppression filters.
29 *
30 */
31 public final class FilterUtil {
32
33 /** Stop instances being created. **/
34 private FilterUtil() {
35 }
36
37 /**
38 * Checks if suppression source with given fileName exists.
39 *
40 * @param fileName name of the suppressions file.
41 * @return true if suppression file exists, otherwise false
42 */
43 public static boolean isFileExists(String fileName) {
44 boolean suppressionSourceExists;
45 try (InputStream stream = CommonUtil.getUriByFilename(fileName).toURL().openStream()) {
46 suppressionSourceExists = true;
47 }
48 catch (CheckstyleException | IOException ignored) {
49 suppressionSourceExists = false;
50 }
51 return suppressionSourceExists;
52 }
53
54 }