001/////////////////////////////////////////////////////////////////////////////////////////////// 002// checkstyle: Checks Java source code and other text files for adherence to a set of rules. 003// Copyright (C) 2001-2024 the original author or authors. 004// 005// This library is free software; you can redistribute it and/or 006// modify it under the terms of the GNU Lesser General Public 007// License as published by the Free Software Foundation; either 008// version 2.1 of the License, or (at your option) any later version. 009// 010// This library is distributed in the hope that it will be useful, 011// but WITHOUT ANY WARRANTY; without even the implied warranty of 012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013// Lesser General Public License for more details. 014// 015// You should have received a copy of the GNU Lesser General Public 016// License along with this library; if not, write to the Free Software 017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 018/////////////////////////////////////////////////////////////////////////////////////////////// 019 020package com.puppycrawl.tools.checkstyle.utils; 021 022import java.io.IOException; 023import java.io.InputStream; 024 025import com.puppycrawl.tools.checkstyle.api.CheckstyleException; 026 027/** 028 * Utility methods for suppression filters. 029 * 030 */ 031public final class FilterUtil { 032 033 /** Stop instances being created. **/ 034 private FilterUtil() { 035 } 036 037 /** 038 * Checks if suppression source with given fileName exists. 039 * 040 * @param fileName name of the suppressions file. 041 * @return true if suppression file exists, otherwise false 042 */ 043 public static boolean isFileExists(String fileName) { 044 boolean suppressionSourceExists; 045 try (InputStream stream = CommonUtil.getUriByFilename(fileName).toURL().openStream()) { 046 suppressionSourceExists = true; 047 } 048 catch (CheckstyleException | IOException ignored) { 049 suppressionSourceExists = false; 050 } 051 return suppressionSourceExists; 052 } 053 054}