FileTypeMap (Java Platform SE 6)
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Java™ PlatformStandard Ed. 6
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javax.activation
Class FileTypeMap
java.lang.Object
javax.activation.FileTypeMap
Direct Known Subclasses: MimetypesFileTypeMap
public abstract class FileTypeMapextends Object
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.
Since:
1.6
See Also:FileTypeMap,
FileDataSource,
MimetypesFileTypeMap
Constructor Summary
FileTypeMap()
The default constructor.
Method Summary
abstract String
getContentType(File file)
Return the type of the file object.
abstract String
getContentType(String filename)
Return the type of the file passed in.
static FileTypeMap
getDefaultFileTypeMap()
Return the default FileTypeMap for the system.
static void
setDefaultFileTypeMap(FileTypeMap map)
Sets the default FileTypeMap for the system.
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Constructor Detail
FileTypeMap
public FileTypeMap()
The default constructor.
Method Detail
getContentType
public abstract String getContentType(File file)
Return the type of the file object. This method should
always return a valid MIME type.
Parameters:file - A file to be typed.
Returns:The content type.
getContentType
public abstract String getContentType(String filename)
Return the type of the file passed in. This method should
always return a valid MIME type.
Parameters:filename - the pathname of the file.
Returns:The content type.
setDefaultFileTypeMap
public static void setDefaultFileTypeMap(FileTypeMap map)
Sets the default FileTypeMap for the system. This instance
will be returned to callers of getDefaultFileTypeMap.
Parameters:map - The FileTypeMap.
Throws:
SecurityException - if the caller doesn't have permission
to change the default
getDefaultFileTypeMap
public static FileTypeMap getDefaultFileTypeMap()
Return the default FileTypeMap for the system.
If setDefaultFileTypeMap was called, return
that instance, otherwise return an instance of
MimetypesFileTypeMap.
Returns:The default FileTypeMapSee Also:setDefaultFileTypeMap(javax.activation.FileTypeMap)
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Submit a bug or featureFor further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples. Copyright 2009 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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