1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2019 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 * @param fileName name of the suppressions file.
40 * @return true if suppression file exists, otherwise false
41 */
42 public static boolean isFileExists(String fileName) {
43 boolean suppressionSourceExists;
44 try (InputStream stream = CommonUtil.getUriByFilename(fileName).toURL().openStream()) {
45 suppressionSourceExists = true;
46 }
47 catch (CheckstyleException | IOException ignored) {
48 suppressionSourceExists = false;
49 }
50 return suppressionSourceExists;
51 }
52
53 }