Class FileNameUtil
- java.lang.Object
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- org.apache.commons.compress.compressors.FileNameUtil
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public class FileNameUtil extends java.lang.Object
File name mapping code for the compression formats.- Since:
- 1.4
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Field Summary
Fields Modifier and Type Field Description private java.util.Map<java.lang.String,java.lang.String>
compressSuffix
Map from common file name suffixes to the suffixes that identify compressed versions of those file types.private java.lang.String
defaultExtension
The format's default extension.private int
longestCompressedSuffix
Length of the longest compressed suffix.private int
longestUncompressedSuffix
Length of the longest uncompressed suffix.private int
shortestCompressedSuffix
Length of the shortest compressed suffix.private int
shortestUncompressedSuffix
Length of the shortest uncompressed suffix longer than the empty string.private java.util.Map<java.lang.String,java.lang.String>
uncompressSuffix
Map from common file name suffixes of compressed files to the corresponding suffixes of uncompressed files.
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Constructor Summary
Constructors Constructor Description FileNameUtil(java.util.Map<java.lang.String,java.lang.String> uncompressSuffix, java.lang.String defaultExtension)
sets up the utility with a map of known compressed to uncompressed suffix mappings and the default extension of the format.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getCompressedFilename(java.lang.String fileName)
Maps the given file name to the name that the file should have after compression.java.lang.String
getUncompressedFilename(java.lang.String fileName)
Maps the given name of a compressed file to the name that the file should have after uncompression.boolean
isCompressedFilename(java.lang.String fileName)
Detects common format suffixes in the given file name.
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Field Detail
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compressSuffix
private final java.util.Map<java.lang.String,java.lang.String> compressSuffix
Map from common file name suffixes to the suffixes that identify compressed versions of those file types. For example: from ".tar" to ".tgz".
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uncompressSuffix
private final java.util.Map<java.lang.String,java.lang.String> 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.
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longestCompressedSuffix
private final int longestCompressedSuffix
Length of the longest compressed suffix.
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shortestCompressedSuffix
private final int shortestCompressedSuffix
Length of the shortest compressed suffix.
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longestUncompressedSuffix
private final int longestUncompressedSuffix
Length of the longest uncompressed suffix.
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shortestUncompressedSuffix
private final int shortestUncompressedSuffix
Length of the shortest uncompressed suffix longer than the empty string.
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defaultExtension
private final java.lang.String defaultExtension
The format's default extension.
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Constructor Detail
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FileNameUtil
public FileNameUtil(java.util.Map<java.lang.String,java.lang.String> uncompressSuffix, java.lang.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"
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Method Detail
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isCompressedFilename
public boolean isCompressedFilename(java.lang.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
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getUncompressedFilename
public java.lang.String getUncompressedFilename(java.lang.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
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getCompressedFilename
public java.lang.String getCompressedFilename(java.lang.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
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