org.apache.commons.compress.compressors

Class FileNameUtil



  • public class FileNameUtilextends Object
    File name mapping code for the compression formats.
    Since:
    1.4
    This class is thread-safe
    • Constructor Detail

      • FileNameUtil

        public FileNameUtil(Map<String,String> uncompressSuffix,            String defaultExtension)
        sets up the utility with a map of known compressed to uncompressed suffix mappings and the default extension of the format.
        Parameters:
        uncompressSuffix - Map from common filename suffixes of compressed files to the corresponding suffixes of uncompressed files. For example: from ".tgz" to ".tar". This map also contains format-specific suffixes like ".gz" and "-z". These suffixes are mapped to the empty string, as they should simply be removed from the filename when the file is uncompressed.
        defaultExtension - the format's default extension like ".gz"
    • Method Detail

      • isCompressedFilename

        public boolean isCompressedFilename(String filename)
        Detects common format suffixes in the given filename.
        Parameters:
        filename - name of a file
        Returns:
        true if the filename has a common format suffix, false otherwise
      • getUncompressedFilename

        public String getUncompressedFilename(String filename)
        Maps the given name of a compressed file to the name that the file should have after uncompression. Commonly used file type specific suffixes like ".tgz" or ".svgz" are automatically detected and correctly mapped. For example the name "package.tgz" is mapped to "package.tar". And any filenames with the generic ".gz" suffix (or any other generic gzip suffix) is mapped to a name without that suffix. If no format suffix is detected, then the filename is returned unmapped.
        Parameters:
        filename - name of a file
        Returns:
        name of the corresponding uncompressed file
      • getCompressedFilename

        public String getCompressedFilename(String filename)
        Maps the given filename to the name that the file should have after compression. Common file types with custom suffixes for compressed versions are automatically detected and correctly mapped. For example the name "package.tar" is mapped to "package.tgz". If no custom mapping is applicable, then the default ".gz" suffix is appended to the filename.
        Parameters:
        filename - name of a file
        Returns:
        name of the corresponding compressed file

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