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JNIMethods
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org.netlib.utils</FONT>
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Class JNIMethods</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.netlib.utils.JNIMethods</B>
</PRE>
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<DL>
<DT><PRE>public final class <B>JNIMethods</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
Static helper methods for dealing with the Java Native Interface and detection of
operating systems and architectures. The main purpose of this class is to provide a
more portable alternative to the System.loadLibrary method (and horrible syntax of
Bundle-NativeCode in MANIFEST files) when bundling binaries as part of a jar (either
inside, or in a directory structure nearby).
<p>
Note on usage: unfortunately it is not possible to provide a loadLibrary(String) method
here as it needs to know the calling class, which is lost when wrapped here. To load a
native library using this class, call the getPortableLibraryName() method to return a
String which may then be passed to System.loadLibrary().
<p>
Note: due to the nature of this class, a portable JUnit TestCase is not possible.
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<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.ARCHType.html" title="enum in org.netlib.utils">JNIMethods.ARCHType</A></B></CODE>
<BR>
Enumeration of common CPU architectures.</TD>
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<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.OSType.html" title="enum in org.netlib.utils">JNIMethods.OSType</A></B></CODE>
<BR>
Enumeration of common operating systems, independent of version or architecture.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../org/netlib/utils/JNIMethods.ARCHType.html" title="enum in org.netlib.utils">JNIMethods.ARCHType</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.html#ARCH">ARCH</A></B></CODE>
<BR>
Stores the CPU Architecture the JVM is currently running on.</TD>
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<CODE>static <A HREF="../../../org/netlib/utils/JNIMethods.OSType.html" title="enum in org.netlib.utils">JNIMethods.OSType</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.html#OS">OS</A></B></CODE>
<BR>
Stores the operating system the JVM is currently running on.</TD>
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<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.html#JNIMethods()">JNIMethods</A></B>()</CODE>
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<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/netlib/utils/JNIMethods.html#getPortableLibraryName(java.lang.String)">getPortableLibraryName</A></B>(java.lang.String name)</CODE>
<BR>
The System.mapLibraryName method is broken in the sense that it does not give
unique names for operating systems and architectures.</TD>
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<CODE>static void</CODE></FONT></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="ARCH"><!-- --></A><H3>
ARCH</H3>
<PRE>
public static final <A HREF="../../../org/netlib/utils/JNIMethods.ARCHType.html" title="enum in org.netlib.utils">JNIMethods.ARCHType</A> <B>ARCH</B></PRE>
<DL>
<DD>Stores the CPU Architecture the JVM is currently running on.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="OS"><!-- --></A><H3>
OS</H3>
<PRE>
public static final <A HREF="../../../org/netlib/utils/JNIMethods.OSType.html" title="enum in org.netlib.utils">JNIMethods.OSType</A> <B>OS</B></PRE>
<DL>
<DD>Stores the operating system the JVM is currently running on.
<P>
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<A NAME="JNIMethods()"><!-- --></A><H3>
JNIMethods</H3>
<PRE>
public <B>JNIMethods</B>()</PRE>
<DL>
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<A NAME="getPortableLibraryName(java.lang.String)"><!-- --></A><H3>
getPortableLibraryName</H3>
<PRE>
public static java.lang.String <B>getPortableLibraryName</B>(java.lang.String name)</PRE>
<DL>
<DD>The System.mapLibraryName method is broken in the sense that it does not give
unique names for operating systems and architectures. In order to facilitate
cross-platform compatibility allowing bundled binary files, this method will return
a unique library name, dependent on the operating system and architecture. The
return value of this method should be passed to the System.loadLibrary method
instead of the raw library name.
<p>
The resulting filename will be constructed by forcing the library name to lowercase
and appending an extra String that is defined by the operating system (the
architecture is only encoded if it is relevant). Some examples are for the
parameter 'name':-
<ul>
<li>Apple (G3, G4): "name-apple-ppc"</li>
<li>Apple (G5): "name-apple-ppc_64"</li>
<li>Apple (Intel): "name-apple-x86"</li>
<li>Apple (Intel 64 Bit mode): "name-apple-x86_64"</li>
<li>Linux (i686): "name-linux-x86"</li>
<li>Linux (Intel/AMD 64): "name-linux-x86_64"</li>
<li>Linux (sparc): "name-linux-sparc"</li>
<li>Linux (PPC 32 bit): "name-linux-ppc"</li>
<li>Linux (PPC 64 bit): "name-linux-ppc_64"</li>
<li>Windows XP/Vista (i686): "name-windows-x86"</li>
<li>Windows XP/Vista (Intel/AMD 64): "name-windows-x86_64"</li>
<li>Sun Solaris (Blade): "name-sun-sparc"</li>
<li>Sun Solaris (Intel 64 bit): "name-sun-x86_64"</li>
</ul>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> -
<DT><B>Returns:</B><DD>
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the input name is zero length or contains a directory separator
character.</DL>
</DD>
</DL>
<HR>
<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[] args)</PRE>
<DL>
<DD><DL>
</DL>
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