javax.activation.FileTypeMap
The FileTypeMap is an abstract class that provides a data typing interface for files. Implementations of this class will implement the getContentType methods which will derive a content type from a file name or a File object. FileTypeMaps could use any scheme to determine the data type, from examining the file extension of a file (like the MimetypesFileTypeMap) to opening the file and trying to derive its type from the contents of the file. The FileDataSource class uses the default FileTypeMap (a MimetypesFileTypeMap unless changed) to determine the content type of files.
The FileTypeMap is an abstract class that provides a data typing interface for files. Implementations of this class will implement the getContentType methods which will derive a content type from a file name or a File object. FileTypeMaps could use any scheme to determine the data type, from examining the file extension of a file (like the MimetypesFileTypeMap) to opening the file and trying to derive its type from the contents of the file. The FileDataSource class uses the default FileTypeMap (a MimetypesFileTypeMap unless changed) to determine the content type of files.
*get-default-file-type-mapclj
(*get-default-file-type-map)Return the default FileTypeMap for the system. If setDefaultFileTypeMap was called, return that instance, otherwise return an instance of MimetypesFileTypeMap.
returns: The default FileTypeMap - javax.activation.FileTypeMap
Return the default FileTypeMap for the system. If setDefaultFileTypeMap was called, return that instance, otherwise return an instance of MimetypesFileTypeMap. returns: The default FileTypeMap - `javax.activation.FileTypeMap`
*set-default-file-type-mapclj
(*set-default-file-type-map file-type-map)Sets the default FileTypeMap for the system. This instance will be returned to callers of getDefaultFileTypeMap.
file-type-map - The FileTypeMap. - javax.activation.FileTypeMap
throws: java.lang.SecurityException - if the caller doesn't have permission to change the default
Sets the default FileTypeMap for the system. This instance will be returned to callers of getDefaultFileTypeMap. file-type-map - The FileTypeMap. - `javax.activation.FileTypeMap` throws: java.lang.SecurityException - if the caller doesn't have permission to change the default
->file-type-mapclj
(->file-type-map)Constructor.
The default constructor.
Constructor. The default constructor.
get-content-typeclj
(get-content-type this file)Return the type of the file object. This method should always return a valid MIME type.
file - A file to be typed. - java.io.File
returns: The content type. - java.lang.String
Return the type of the file object. This method should always return a valid MIME type. file - A file to be typed. - `java.io.File` returns: The content type. - `java.lang.String`
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