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BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2010, Tim Felgentreff Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 package org.jruby.runtime.load;
 import org.jruby.Ruby;
This class wraps the org.jruby.cext.ModuleLoader for loading c-extensions in JRuby. Resources in the native file-system are loaded directly, extensions included in a Jar are extracted to to allow the System to load them into the process space.
 public class CExtension implements Library {
     private LoadServiceResource resource;
     public CExtension(LoadServiceResource resource) {
         this. = resource;

Try loading the found c-extension. If the extension is contained in a Jar file, it will be extracted to the
     public void load(Ruby runtimeboolean wrapthrows IOException {
         String file;
         if (!.getURL().getProtocol().equals("jar")) {
             file = .getAbsolutePath();
         } else {
             // The cext was wrapped in a jar
             InputStream is = .getInputStream();
             FileOutputStream os = null;
             File dstFile = new File(System.getProperty("") + . + 
             if (!dstFile.exists()) { // File doesn't exist yet. Extract it.
                 try {
                     os = new FileOutputStream(dstFile);
                     ReadableByteChannel srcChannel = Channels.newChannel(is);
                     for (long pos = 0; is.available() > 0; ) {
                         pos += os.getChannel().transferFrom(srcChannelpos, Math.max(4096, is.available()));
                 } catch (IOException ex) {
                     throw runtime.newLoadError("Error loading file -- " + .getName());
                 } finally {
                     try {
                         if (os != null)  {
                     } catch (IOException ex) {
                         throw new RuntimeException(ex);
             file = dstFile.getAbsolutePath();
         // set a "global" property to indicate we have loaded a C extension
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