org.apache.commons.compress.compressors

Class FileNameUtil

java.lang.Object

org.apache.commons.compress.compressors.FileNameUtil

public class FileNameUtil
extends Object

File name mapping code for the compression formats.

Since:

1.4

This class is thread-safe

Constructor Summary

Constructors

Constructor and Description
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.

Method Summary

Modifier and Type	Method and Description
String	getCompressedFilename(String fileName) Maps the given file name to the name that the file should have after compression.
String	getUncompressedFilename(String fileName) Maps the given name of a compressed file to the name that the file should have after uncompression.
boolean	isCompressedFilename(String fileName) Detects common format suffixes in the given file name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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 file name 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 file name 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 file name.

Parameters:

fileName - name of a file

Returns:

true if the file name 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 file names 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 file name 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 file name 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 file name.

Parameters:

fileName - name of a file

Returns:

name of the corresponding compressed file