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Java Source Code / Java Documentation » 6.0 JDK Core » activation » javax.activation   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    javax.activation.FileTypeMap All known Subclasses:   javax.activation.MimetypesFileTypeMap, FileTypeMap abstract public class FileTypeMap (Code) 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. See Also:   javax.activation.FileTypeMap See Also:   javax.activation.FileDataSource See Also:   javax.activation.MimetypesFileTypeMap since:    1.6 Constructor Summary public   FileTypeMap()      The default constructor. Method Summary abstract public  String getContentType(File file)      Return the type of the file object. abstract public  String getContentType(String filename)      Return the type of the file passed in. public static  FileTypeMap getDefaultFileTypeMap()      Return the default FileTypeMap for the system. public static  void setDefaultFileTypeMap(FileTypeMap map)      Sets the default FileTypeMap for the system. Constructor Detail FileTypeMap public FileTypeMap()(Code) The default constructor. Method Detail getContentType abstract public String getContentType(File file)(Code) Return the type of the file object. This method should always return a valid MIME type. Parameters:   file - A file to be typed. The content type. getContentType abstract public String getContentType(String filename)(Code) Return the type of the file passed in. This method should always return a valid MIME type. Parameters:   filename - the pathname of the file. The content type. getDefaultFileTypeMap public static FileTypeMap getDefaultFileTypeMap()(Code) Return the default FileTypeMap for the system. If setDefaultFileTypeMap was called, return that instance, otherwise return an instance of MimetypesFileTypeMap. The default FileTypeMap See Also:   javax.activation.FileTypeMap.setDefaultFileTypeMap setDefaultFileTypeMap public static void setDefaultFileTypeMap(FileTypeMap map)(Code) Sets the default FileTypeMap for the system. This instance will be returned to callers of getDefaultFileTypeMap. Parameters:   map - The FileTypeMap. exception:   SecurityException - if the caller doesn't have permissionto change the default Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)