Package com.vaadin.flow.internal

Class CompressUtil

java.lang.Object
com.vaadin.flow.internal.CompressUtil
public class CompressUtil extends Object
Utility class for compression and decompression of folders, files and strings.

For internal use only. May be renamed or removed in a future release.

Since:
25.0
Author:
Vaadin Ltd

  • Method Details

    • compressDirectory

      public static void compressDirectory(File targetDirectory, File outfile)
      Compress target directory and children into given target outfile. All files will be zipped and the targetDirectory will not be in the package.
      Parameters:
      targetDirectory - directory content to compress
      outfile - file to compress directory content to

    • uncompressFile

      public static void uncompressFile(File zip, File targetDirectory)
      Uncompress given zip file content to the target directory.
      Parameters:
      zip - file to uncompress
      targetDirectory - target directory to uncompress files to

    • hasFileInZip

      public static boolean hasFileInZip(File zip, String filename) throws IOException
      Checks if the given zip file contains a file with the given name.
      Parameters:
      zip - Target zip file
      filename - Target file name
      Returns:
      true if the file is found in the zip
      Throws:
      IOException - if an I/O error occurs
      Since:
      25.3

    • readFileContentFromZip

      public static String readFileContentFromZip(File zip, String filename) throws IOException
      Read a file content from the given zip file.
      Parameters:
      zip - Target zip file
      filename - Target file name
      Returns:
      File content or null if not found
      Throws:
      IOException - if an I/O error occurs

    • deflateString

      public static byte[] deflateString(String text)
      Compresses a string with the deflate algorithm, favoring speed over size. Use inflateString(byte[]) to get the string back.
      Parameters:
      text - the string to compress, not null
      Returns:
      the compressed UTF-8 bytes of the string

    • inflateString

      public static String inflateString(byte[] data)
      Decompresses a string compressed with deflateString(String).
      Parameters:
      data - the compressed bytes, not null
      Returns:
      the original string