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BEGIN LICENSE BLOCK ***** Version: CPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Common 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 http://www.eclipse.org/legal/cpl-v10.html 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) 2002-2011 JRuby Community 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 CPL, 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 CPL, the GPL or the LGPL. END LICENSE BLOCK ***
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 package org.jruby.embed.osgi.utils;
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 import java.io.File;
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 import java.net.URL;
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 import  org.osgi.framework.Bundle;
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 import  org.osgi.framework.BundleContext;
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 import  org.osgi.framework.BundleException;
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 import  org.osgi.framework.FrameworkUtil;

Helper methods for the Ruby Runtime.

Author(s):
hmalphettes
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 public class OSGiFileLocator {
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 	public static final String JRUBY_SYMBOLIC_NAME = "org.jruby.jruby";

Returns:
The home for gems and other files as provided by jruby.
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 	public static File getJRubyHomeFolder() throws IOException {
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 		//TODO: system property to override this?
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 	    //TODO: add some clutches to support jarred up jruby bundles?
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 	    return getFileInBundle(, "/META-INF/jruby.home");
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 	}
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 	public static File getFileInBundle(String symbolicName, String path) throws IOException {
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 		Bundle bundle = getBundle(symbolicName);
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 		if (bundle == null) {
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 			throw new IOException("Unable to find the bundle " + symbolicName);
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 		}
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 		return getFileInBundle(bundle, path);
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 	}
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 	public static File getFileInBundle(Bundle bundle, String path) throws IOException {
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 		URL url = null;
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 		try {
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 			url = getFileURL(bundle.getEntry(path));
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 			return new File(url.toURI());
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 		} catch (NullPointerException ne) {
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 			throw new IOException("Unable to find the " + path + " folder in the bundle '" 
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 					+ bundle.getSymbolicName() + "'; is the org.jruby.jruby bundle unzipped? ");
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 		} catch (Exception e) {
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             IOException exception = new IOException("Unable to find the " + path + 
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                     " folder in the bundle '" + bundle.getSymbolicName() + "'");
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             exception.initCause(e); // Should be safe since IOException(String) should call super(String).
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             throw exception;
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 		}
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 	}

Parameters:
symbolicName
Returns:
The bundle with this symbolic name
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 	public static Bundle getBundle(String symbolicName) {
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 	    BundleContext bc = FrameworkUtil.getBundle(OSGiFileLocator.class).getBundleContext();
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 	    if (bc == null) {
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 	        //if the bundle was not activatged then let's activate it.
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             try {
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                 FrameworkUtil.getBundle(OSGiFileLocator.class).start();
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             } catch (BundleException e) {
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                 throw new IllegalStateException("Could not start the bundle "
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                     + FrameworkUtil.getBundle(OSGiFileLocator.class).getSymbolicName());
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             }
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             bc = FrameworkUtil.getBundle(OSGiFileLocator.class).getBundleContext();
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             if (bc == null) {
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                 //this should never happen
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                 throw new IllegalStateException("The bundle "
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	                + FrameworkUtil.getBundle(OSGiFileLocator.class).getSymbolicName()
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	                + " is not activated.");
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            }
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	    }
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		for (Bundle b : FrameworkUtil.getBundle(OSGiFileLocator.class).getBundleContext().getBundles()) {
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			if (b.getSymbolicName().equals(symbolicName)) {
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				return b;
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			}
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		}
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		return null;
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	}
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	//introspection on equinox to invoke the getLocalURL method on BundleURLConnection
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	private static Method BUNDLE_URL_CONNECTION_getLocalURL = null;
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	private static Method BUNDLE_URL_CONNECTION_getFileURL = null;
Only useful for equinox: on felix we get the file:// or jar:// url already. Other OSGi implementations have not been tested

Get a URL to the bundle entry that uses a common protocol (i.e. file: jar: or http: etc.).

Returns:
a URL to the bundle entry that uses a common protocol
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	public static URL getLocalURL(URL url) {
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		if ("bundleresource".equals(url.getProtocol()) || "bundleentry".equals(url.getProtocol())) {
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			try {
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								"org.eclipse.osgi.framework.internal.core.BundleURLConnection")) {
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				}
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				}
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			} catch (Throwable t) {
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			}
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		}
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		return url;
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	}
Only useful for equinox: on felix we get the file:// url already. Other OSGi implementations have not been tested

Get a URL to the content of the bundle entry that uses the file: protocol. The content of the bundle entry may be downloaded or extracted to the local file system in order to create a file: URL.

Returns:
a URL to the content of the bundle entry that uses the file: protocol 
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	public static URL getFileURL(URL url)
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	{
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		if ("bundleresource".equals(url.getProtocol()) || "bundleentry".equals(url.getProtocol()))
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		{
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			try
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			{
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								"org.eclipse.osgi.framework.internal.core.BundleURLConnection"))
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				{
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				}
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				{
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				}
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			}
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			catch (Throwable t)
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			{
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			}
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		}
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		return url;
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	}
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