winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/backend/filebased/FileUtils.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012-2013 University of Stuttgart.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * and the Apache License 2.0 which both accompany this distribution,
   6  * and are available at http://www.eclipse.org/legal/epl-v10.html
   7  * and http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Contributors:
  10  *     Oliver Kopp - initial API and implementation
  11  *******************************************************************************/
  12 package org.eclipse.winery.repository.backend.filebased;
  13
  14 import static java.nio.file.FileVisitResult.CONTINUE;
  15
  16 import java.io.IOException;
  17 import java.nio.file.FileVisitResult;
  18 import java.nio.file.Files;
  19 import java.nio.file.Path;
  20 import java.nio.file.SimpleFileVisitor;
  21 import java.nio.file.attribute.BasicFileAttributes;
  22
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 public class FileUtils {
  27
  28         private static final Logger logger = LoggerFactory.getLogger(FileUtils.class);
  29
  30
  31         /**
  32          * Deletes given path. If path a file, it is directly deleted. If it is a
  33          * directory, the directory is recursively deleted.
  34          *
  35          * Does not try to change read-only files to read-write files
  36          *
  37          * Only uses Java7's nio, does not fall back to Java6.
  38          *
  39          * @param path the path to delete
  40          * @throws IOException
  41          */
  42         public static void forceDelete(Path path) throws IOException {
  43                 if (Files.isDirectory(path)) {
  44                         try {
  45                                 Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
  46
  47                                         @Override
  48                                         public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
  49                                                 try {
  50                                                         Files.delete(file);
  51                                                 } catch (IOException e) {
  52                                                         FileUtils.logger.debug("Could not delete file", e.getMessage());
  53                                                 }
  54                                                 return CONTINUE;
  55                                         }
  56
  57                                         @Override
  58                                         public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
  59                                                 if (exc == null) {
  60                                                         try {
  61                                                                 Files.delete(dir);
  62                                                         } catch (IOException e) {
  63                                                                 FileUtils.logger.debug("Could not delete dir", e);
  64                                                         }
  65                                                         return CONTINUE;
  66                                                 } else {
  67                                                         FileUtils.logger.debug("Could not delete file", exc);
  68                                                         return CONTINUE;
  69                                                 }
  70                                         }
  71                                 });
  72                         } catch (IOException e) {
  73                                 FileUtils.logger.debug("Could not delete dir", e);
  74                         }
  75                 } else {
  76                         try {
  77                                 Files.delete(path);
  78                         } catch (IOException e) {
  79                                 FileUtils.logger.debug("Could not delete file", e.getMessage());
  80                         }
  81                 }
  82         }
  83
  84         /**
  85          * Creates the given directory including its parent directories, if they do
  86          * not exist.
  87          *
  88          * @param path
  89          * @throws IOException
  90          */
  91         public static void createDirectory(Path path) throws IOException {
  92                 Path parent = path.getParent();
  93                 if (parent == null) {
  94                         throw new IOException("No parent found");
  95                 }
  96                 if (!Files.exists(parent)) {
  97                         FileUtils.createDirectory(parent);
  98                 }
  99                 if (!Files.exists(path)) {
 100                         Files.createDirectory(path);
 101                 }
 102         }
 103
 104         // public static Response readContentFromFile(RepositoryFileReference ref) {
 105         // try {
 106         // Repository.INSTANCE.readContentFromFile(ref);
 107         // }
 108         // }
 109
 110 }