зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
3.9 KiB
Java
106 строки
3.9 KiB
Java
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Java XPCOM Bindings.
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*
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* The Initial Developer of the Original Code is
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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* IBM Corporation. All Rights Reserved.
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*
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* Contributor(s):
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* Javier Pedemonte (jhpedemonte@gmail.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.xpcom;
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import java.lang.reflect.*;
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import java.io.*;
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public final class XPCOM {
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public static native nsIServiceManager initXPCOM(File aMozBinDirectory, AppFileLocProvider aAppFileLocProvider);
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public static native void shutdownXPCOM(nsIServiceManager aServMgr);
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public static native nsIServiceManager getServiceManager();
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public static native nsIComponentManager getComponentManager();
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public static native nsIComponentRegistrar getComponentRegistrar();
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public static native nsILocalFile newLocalFile(String aPath, boolean followLinks);
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/* Utility functions */
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// Generic QueryInterface implementation
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public static nsISupports queryInterface(nsISupports aObject, String aIID)
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{
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Class[] interfaces = aObject.getClass().getInterfaces();
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for (int i = 0; i < interfaces.length; i++ ) {
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if (aIID.equals(XPCOM.getInterfaceIID(interfaces[i])))
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return aObject;
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}
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return null;
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}
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// Given an interface, this will construct the name of the IID field (such as
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// NS_ISUPPORTS_IID) and return its value.
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public static String getInterfaceIID(Class aInterface)
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{
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// Get short class name (i.e. "bar", not "org.blah.foo.bar")
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StringBuffer iidName = new StringBuffer();
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String fullClassName = aInterface.getName();
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int index = fullClassName.lastIndexOf(".");
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String className = index > 0 ? fullClassName.substring(index + 1) :
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fullClassName;
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// Create iid field name
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if (className.startsWith("ns")) {
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iidName.append("NS_");
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iidName.append(className.substring(2).toUpperCase());
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} else {
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iidName.append(className.toUpperCase());
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}
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iidName.append("_IID");
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String iid;
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try {
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Field iidField = aInterface.getDeclaredField(iidName.toString());
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iid = (String) iidField.get(null);
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} catch (NoSuchFieldException e) {
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// Class may implement non-Mozilla interfaces, which would not have an
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// IID method. In that case, just return an emptry string.
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iid = "";
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} catch (IllegalAccessException e) {
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// XXX Should be using a logging service, such as java.util.logging
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System.err.println("ERROR: Could not get field " + iidName.toString());
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iid = "";
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}
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return iid;
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}
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}
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