content: package org.apache.archiva.common.utils;
  /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.*;
  import java.nio.charset.Charset;
  import java.nio.file.CopyOption;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.nio.file.StandardCopyOption;
  import java.nio.file.StandardOpenOption;
  import java.util.Comparator;
  import java.util.Optional;
  import java.util.stream.Stream;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipFile;
  
  /**
   * Utility class for file manipulation
   *
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  public class FileUtils {
      private static final Logger log = LoggerFactory.getLogger(FileUtils.class);
  
      /**
       * Deletes the directory recursively and quietly.
       *
       * @param dir
       */
      public static void deleteQuietly(Path dir) {
          try(Stream<Path> stream = Files.walk(dir)) {
              stream
                  .sorted( Comparator.reverseOrder() )
                  .forEach(file -> {
                          try {
                              Files.delete(file);
                          } catch (IOException e) {
                              // Ignore this
                              if (log.isDebugEnabled()) {
                                  log.debug( "Exception during file delete: {}", e.getMessage( ), e );
                              }
                          }
  
                      });
          } catch (IOException e) {
              // Ignore this
          }
  
  
      }
  
      public static IOStatus deleteDirectoryWithStatus(Path dir) throws IOException {
          if (!Files.exists(dir)) {
              IOStatus status = new IOStatus( );
              status.addError( dir, new FileNotFoundException( "Directory not found " + dir ) );
              return status;
          }
          if (!Files.isDirectory(dir)) {
              IOStatus status = new IOStatus( );
              status.addError(dir, new IOException("Given path is not a directory " + dir));
          }
          try( Stream<Path> stream = Files.walk(dir)) {
                  return stream
                      .sorted( Comparator.reverseOrder() )
                  .map(file ->
                  {
                      try {
                          Files.delete(file);
                          return new FileStatus( file, StatusResult.DELETED );
                      } catch (UncheckedIOException e) {
                          log.warn("File could not be deleted {}", file);
                          return new FileStatus( file, e.getCause( ) );
                      }
                      catch ( IOException e )
                      {
                          return new FileStatus( file, e );
                      }
                  }).collect( IOStatus::new, IOStatus::accumulate, IOStatus::combine );
          } catch (UncheckedIOException e) {
              throw new IOException("File deletion failed ", e);
          }
      }
  
      public static void deleteDirectory(Path dir) throws IOException {
          if (!Files.exists(dir)) {
              return;
          }
          if (!Files.isDirectory(dir)) {
              throw new IOException("Given path is not a directory " + dir);
          }
          boolean result = true;
          try(Stream<Path> stream = Files.walk(dir)) {
              result = stream
                  .sorted( Comparator.reverseOrder() )
                  .map(file ->
                      {
                          try {
                              Files.delete(file);
                              return Optional.of(Boolean.TRUE);
                          } catch (UncheckedIOException | IOException e) {
                              log.warn("File could not be deleted {}: {}", file, e.getMessage());
                              return Optional.empty();
                          }
  
                      }).allMatch(Optional::isPresent);
          } catch (UncheckedIOException e) {
              throw new IOException("File deletion failed ", e);
          }
          if (!result) {
              throw new IOException("Error during recursive delete of " + dir.toAbsolutePath());
          }
      }
  
      public static String readFileToString(Path file, Charset encoding) {
          try {
              return new String(Files.readAllBytes(file), encoding);
          } catch (IOException e) {
              log.error("Could not read from file {}", file);
              return "";
          }
      }
  
      public static void writeStringToFile(Path file, Charset encoding, String value) {
          try {
              Files.write(file, value.getBytes(encoding), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
          } catch (IOException e) {
              log.error("Could not write to file {}", file);
          }
      }
  
      /**
       * Return the base directory
       *
       * @return
       */
      public static String getBasedir() {
          String basedir = System.getProperty("basedir");
          if (basedir == null) {
              basedir = Paths.get("").toAbsolutePath().toString();
          }
  
          return basedir;
      }
  
      /**
       * This checks, if the given child is a absolute path. If this is the case
       * the relative path is used.
       *
       * @param parent The parent directory
       * @param child  The child
       * @return The path parent/child
       */
      public Path resolveNonAbsolute(Path parent, String child) {
          Path childPath = Paths.get(child);
          if (childPath.isAbsolute()) {
              return parent.resolve(childPath.getNameCount() > 0 ? childPath.subpath(0, childPath.getNameCount()) : Paths.get(""));
          } else {
              return parent.resolve(child);
          }
      }
  
      public static void unzipFileEntry(ZipFile file, ZipEntry entry, Path destinationPath) throws IOException {
          InputStream is = file.getInputStream(entry);
          BufferedInputStream bis = new BufferedInputStream(is);
          Path uncompressedFilePath = destinationPath.resolve(entry.getName());
          Path parentPath = uncompressedFilePath.getParent();
          if (!Files.exists(parentPath)) {
              Files.createDirectories(parentPath);
          }
          Files.createFile(uncompressedFilePath);
          OutputStream fileOutput = Files.newOutputStream(uncompressedFilePath);
          while (bis.available() > 0) {
              fileOutput.write(bis.read());
          }
          fileOutput.close();
      }
  
  
      /**
       * Unzips a file into a destination directory. It does not update the modification time according the
       * the date in the zip file. All subdirectories will be created if the zip file contains a directory structure.
       *
       * @param zipFile the path to the zip file
       * @param destinationPath the destination path where the files should be extracted.
       * @throws IOException if an error occurs during extract.
       */
      public static void unzip(Path zipFile, Path destinationPath) throws IOException {
          try (ZipFile file = new ZipFile(zipFile.toFile())) {
              file.stream().forEach(e -> {
                  try {
                      if (e.isDirectory()) {
                          Files.createDirectories(destinationPath.resolve(e.getName()));
                      } else {
                          unzipFileEntry(file, e, destinationPath);
                      }
                  } catch (IOException ex) {
                      log.error("Error occured during unzip of zipFile={}, entry={}. Message: {}", zipFile, e.getName(), ex.getMessage());
                  }
              });
          }
      }
  
  
      public static void copyContent(Path srcDir, Path destinationDir, boolean overwrite) throws IOException
      {
          CopyOption[] copyOption = overwrite ? new CopyOption[]{StandardCopyOption.REPLACE_EXISTING} : new CopyOption[]{};
          Files.walk(srcDir).forEach(a -> {
              Path b = destinationDir.resolve(srcDir.relativize( a ));
              try {
                  Files.copy(a, b, copyOption);
              } catch (IOException e) {
                  log.error( "Could not copy file {} to {}: {}", a, b, e.getMessage( ) );
              }
          });
      }
  
      public static void copyContent(Path srcDir, Path destinationDir) throws IOException {
          copyContent( srcDir, destinationDir, true );
      }
  }
  