Coverage Report - com.puppycrawl.tools.checkstyle.utils.FilterUtils
 
Classes in this File Line Coverage Branch Coverage Complexity
FilterUtils
100%
19/19
100%
2/2
2
 
 1  
 ////////////////////////////////////////////////////////////////////////////////
 2  
 // checkstyle: Checks Java source code for adherence to a set of rules.
 3  
 // Copyright (C) 2001-2017 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  
 import java.net.URI;
 25  
 import java.net.URL;
 26  
 
 27  
 import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
 28  
 
 29  
 /**
 30  
  * Utility methods for suppression filters.
 31  
  *
 32  
  * @author Timur Tibeyev.
 33  
  */
 34  
 public final class FilterUtils {
 35  
 
 36  
     /** Stop instances being created. **/
 37  1
     private FilterUtils() {
 38  
 
 39  1
     }
 40  
 
 41  
     /**
 42  
      * Checks if suppression source with given fileName exists.
 43  
      * @param fileName name of the suppressions file.
 44  
      * @return true if suppression file exists, otherwise false
 45  
      */
 46  
     public static boolean isFileExists(String fileName) {
 47  10
         boolean suppressionSourceExists = true;
 48  10
         InputStream sourceInput = null;
 49  
         try {
 50  10
             final URI uriByFilename = CommonUtils.getUriByFilename(fileName);
 51  7
             final URL url = uriByFilename.toURL();
 52  7
             sourceInput = url.openStream();
 53  
         }
 54  4
         catch (CheckstyleException | IOException ignored) {
 55  4
             suppressionSourceExists = false;
 56  
         }
 57  
         finally {
 58  10
             suppressionSourceExists = closeQuietlyWithResult(sourceInput, suppressionSourceExists);
 59  10
         }
 60  10
         return suppressionSourceExists;
 61  
     }
 62  
 
 63  
     /**
 64  
      * Close input.
 65  
      * This method is required till https://github.com/cobertura/cobertura/issues/170
 66  
      * @param sourceInput stream to close
 67  
      * @param suppressionSourceExists previous state of flag
 68  
      * @return result of close operation
 69  
      */
 70  
     private static boolean closeQuietlyWithResult(InputStream sourceInput,
 71  
                                                   boolean suppressionSourceExists) {
 72  10
         boolean closed = suppressionSourceExists;
 73  10
         if (sourceInput != null) {
 74  
             try {
 75  6
                 sourceInput.close();
 76  
             }
 77  1
             catch (IOException ignored) {
 78  1
                 closed = false;
 79  5
             }
 80  
         }
 81  10
         return closed;
 82  
     }
 83  
 }