Mercurial Hosting > luan
view src/org/eclipse/jetty/util/Loader.java @ 804:9f5ba30722bb
remove org.eclipse.jetty.util.ajax
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 07 Sep 2016 21:28:02 -0600 |
parents | 3428c60d7cfc |
children |
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// // ======================================================================== // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. // ------------------------------------------------------------------------ // All rights reserved. This program and the accompanying materials // are made available under the terms of the Eclipse Public License v1.0 // and Apache License v2.0 which accompanies this distribution. // // The Eclipse Public License is available at // http://www.eclipse.org/legal/epl-v10.html // // The Apache License v2.0 is available at // http://www.opensource.org/licenses/apache2.0.php // // You may elect to redistribute this code under either of these licenses. // ======================================================================== // package org.eclipse.jetty.util; import java.io.File; import java.net.URL; import java.net.URLClassLoader; import java.util.Locale; import java.util.MissingResourceException; import java.util.ResourceBundle; import org.eclipse.jetty.util.resource.Resource; /* ------------------------------------------------------------ */ /** ClassLoader Helper. * This helper class allows classes to be loaded either from the * Thread's ContextClassLoader, the classloader of the derived class * or the system ClassLoader. * * <B>Usage:</B><PRE> * public class MyClass { * void myMethod() { * ... * Class c=Loader.loadClass(this.getClass(),classname); * ... * } * </PRE> * */ public class Loader { /* ------------------------------------------------------------ */ public static URL getResource(Class<?> loadClass,String name, boolean checkParents) { URL url =null; ClassLoader loader=Thread.currentThread().getContextClassLoader(); while (url==null && loader!=null ) { url=loader.getResource(name); loader=(url==null&&checkParents)?loader.getParent():null; } loader=loadClass==null?null:loadClass.getClassLoader(); while (url==null && loader!=null ) { url=loader.getResource(name); loader=(url==null&&checkParents)?loader.getParent():null; } if (url==null) { url=ClassLoader.getSystemResource(name); } return url; } /* ------------------------------------------------------------ */ @SuppressWarnings("rawtypes") public static Class loadClass(Class loadClass,String name) throws ClassNotFoundException { return loadClass(loadClass,name,false); } /* ------------------------------------------------------------ */ /** Load a class. * * @param loadClass * @param name * @param checkParents If true, try loading directly from parent classloaders. * @return Class * @throws ClassNotFoundException */ @SuppressWarnings("rawtypes") public static Class loadClass(Class loadClass,String name,boolean checkParents) throws ClassNotFoundException { ClassNotFoundException ex=null; Class<?> c =null; ClassLoader loader=Thread.currentThread().getContextClassLoader(); while (c==null && loader!=null ) { try { c=loader.loadClass(name); } catch (ClassNotFoundException e) {if(ex==null)ex=e;} loader=(c==null&&checkParents)?loader.getParent():null; } loader=loadClass==null?null:loadClass.getClassLoader(); while (c==null && loader!=null ) { try { c=loader.loadClass(name); } catch (ClassNotFoundException e) {if(ex==null)ex=e;} loader=(c==null&&checkParents)?loader.getParent():null; } if (c==null) { try { c=Class.forName(name); } catch (ClassNotFoundException e) {if(ex==null)ex=e;} } if (c!=null) return c; throw ex; } /* ------------------------------------------------------------ */ public static ResourceBundle getResourceBundle(Class<?> loadClass,String name,boolean checkParents, Locale locale) throws MissingResourceException { MissingResourceException ex=null; ResourceBundle bundle =null; ClassLoader loader=Thread.currentThread().getContextClassLoader(); while (bundle==null && loader!=null ) { try { bundle=ResourceBundle.getBundle(name, locale, loader); } catch (MissingResourceException e) {if(ex==null)ex=e;} loader=(bundle==null&&checkParents)?loader.getParent():null; } loader=loadClass==null?null:loadClass.getClassLoader(); while (bundle==null && loader!=null ) { try { bundle=ResourceBundle.getBundle(name, locale, loader); } catch (MissingResourceException e) {if(ex==null)ex=e;} loader=(bundle==null&&checkParents)?loader.getParent():null; } if (bundle==null) { try { bundle=ResourceBundle.getBundle(name, locale); } catch (MissingResourceException e) {if(ex==null)ex=e;} } if (bundle!=null) return bundle; throw ex; } /* ------------------------------------------------------------ */ /** * Generate the classpath (as a string) of all classloaders * above the given classloader. * * This is primarily used for jasper. * @return the system class path */ public static String getClassPath(ClassLoader loader) throws Exception { StringBuilder classpath=new StringBuilder(); while (loader != null && (loader instanceof URLClassLoader)) { URL[] urls = ((URLClassLoader)loader).getURLs(); if (urls != null) { for (int i=0;i<urls.length;i++) { Resource resource = Resource.newResource(urls[i]); File file=resource.getFile(); if (file!=null && file.exists()) { if (classpath.length()>0) classpath.append(File.pathSeparatorChar); classpath.append(file.getAbsolutePath()); } } } loader = loader.getParent(); } return classpath.toString(); } }