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Java 2 Platform EE v1.3: Class FileTypeMap
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javax.activation</FONT>
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Class FileTypeMap</H2>
<PRE>
java.lang.Object
|
+--<B>javax.activation.FileTypeMap</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../javax/activation/MimetypesFileTypeMap.html">MimetypesFileTypeMap</A></DD>
</DL>
<HR>
<DL>
<DT>public abstract class <B>FileTypeMap</B><DT>extends java.lang.Object</DL>
<P>
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.
<P>
<DL>
<DT><B>See Also: </B><DD><A HREF="../../javax/activation/FileTypeMap.html"><CODE>FileTypeMap</CODE></A>,
<A HREF="../../javax/activation/FileDataSource.html"><CODE>FileDataSource</CODE></A>,
<A HREF="../../javax/activation/MimetypesFileTypeMap.html"><CODE>MimetypesFileTypeMap</CODE></A></DL>
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<TD><CODE><B><A HREF="../../javax/activation/FileTypeMap.html#FileTypeMap()">FileTypeMap</A></B>()</CODE>
<BR>
The default constructor.</TD>
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<CODE>abstract java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/activation/FileTypeMap.html#getContentType(java.io.File)">getContentType</A></B>(java.io.File file)</CODE>
<BR>
Return the type of the file object.</TD>
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<CODE>abstract java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/activation/FileTypeMap.html#getContentType(java.lang.String)">getContentType</A></B>(java.lang.String filename)</CODE>
<BR>
Return the type of the file passed in.</TD>
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<CODE>static <A HREF="../../javax/activation/FileTypeMap.html">FileTypeMap</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/activation/FileTypeMap.html#getDefaultFileTypeMap()">getDefaultFileTypeMap</A></B>()</CODE>
<BR>
Return the default FileTypeMap for the system.</TD>
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<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/activation/FileTypeMap.html#setDefaultFileTypeMap(javax.activation.FileTypeMap)">setDefaultFileTypeMap</A></B>(<A HREF="../../javax/activation/FileTypeMap.html">FileTypeMap</A> map)</CODE>
<BR>
Sets the default FileTypeMap for the system.</TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="FileTypeMap()"><!-- --></A><H3>
FileTypeMap</H3>
<PRE>
public <B>FileTypeMap</B>()</PRE>
<DL>
<DD>The default constructor.</DL>
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<A NAME="getContentType(java.io.File)"><!-- --></A><H3>
getContentType</H3>
<PRE>
public abstract java.lang.String <B>getContentType</B>(java.io.File file)</PRE>
<DL>
<DD>Return the type of the file object. This method should
always return a valid MIME type.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - A file to be typed.<DT><B>Returns:</B><DD>The content type.</DL>
</DD>
</DL>
<HR>
<A NAME="getContentType(java.lang.String)"><!-- --></A><H3>
getContentType</H3>
<PRE>
public abstract java.lang.String <B>getContentType</B>(java.lang.String filename)</PRE>
<DL>
<DD>Return the type of the file passed in. This method should
always return a valid MIME type.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filename</CODE> - the pathname of the file.<DT><B>Returns:</B><DD>The content type.</DL>
</DD>
</DL>
<HR>
<A NAME="setDefaultFileTypeMap(javax.activation.FileTypeMap)"><!-- --></A><H3>
setDefaultFileTypeMap</H3>
<PRE>
public static void <B>setDefaultFileTypeMap</B>(<A HREF="../../javax/activation/FileTypeMap.html">FileTypeMap</A> map)</PRE>
<DL>
<DD>Sets the default FileTypeMap for the system. This instance
will be returned to callers of getDefaultFileTypeMap.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>map</CODE> - The FileTypeMap.<DT><B>Throws:</B><DD><CODE>java.lang.SecurityException</CODE> - if the caller doesn't have permission
to change the default</DL>
</DD>
</DL>
<HR>
<A NAME="getDefaultFileTypeMap()"><!-- --></A><H3>
getDefaultFileTypeMap</H3>
<PRE>
public static <A HREF="../../javax/activation/FileTypeMap.html">FileTypeMap</A> <B>getDefaultFileTypeMap</B>()</PRE>
<DL>
<DD>Return the default FileTypeMap for the system.
If setDefaultFileTypeMap was called, return
that instance, otherwise return an instance of
<code>MimetypesFileTypeMap</code>.<DD><DL>
<DT><B>Returns:</B><DD>The default FileTypeMap<DT><B>See Also: </B><DD><A HREF="../../javax/activation/FileTypeMap.html#setDefaultFileTypeMap(javax.activation.FileTypeMap)"><CODE>setDefaultFileTypeMap(javax.activation.FileTypeMap)</CODE></A></DL>
</DD>
</DL>
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