Clover coverage report - Cactus 1.5 for J2EE API 1.3
Coverage timestamp: Wed Feb 18 2004 09:09:13 EST
file stats: LOC: 181   Methods: 4
NCLOC: 58   Classes: 1
 
 Source file Conditionals Statements Methods TOTAL
ClassLoaderUtils.java 0% 0% 0% 0%
coverage
 1   
 /*
 2   
  * ====================================================================
 3   
  *
 4   
  * The Apache Software License, Version 1.1
 5   
  *
 6   
  * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 7   
  * reserved.
 8   
  *
 9   
  * Redistribution and use in source and binary forms, with or without
 10   
  * modification, are permitted provided that the following conditions
 11   
  * are met:
 12   
  *
 13   
  * 1. Redistributions of source code must retain the above copyright
 14   
  *    notice, this list of conditions and the following disclaimer.
 15   
  *
 16   
  * 2. Redistributions in binary form must reproduce the above copyright
 17   
  *    notice, this list of conditions and the following disclaimer in
 18   
  *    the documentation and/or other materials provided with the
 19   
  *    distribution.
 20   
  *
 21   
  * 3. The end-user documentation included with the redistribution, if
 22   
  *    any, must include the following acknowlegement:
 23   
  *       "This product includes software developed by the
 24   
  *        Apache Software Foundation (http://www.apache.org/)."
 25   
  *    Alternately, this acknowlegement may appear in the software itself,
 26   
  *    if and wherever such third-party acknowlegements normally appear.
 27   
  *
 28   
  * 4. The names "The Jakarta Project", "Cactus" and "Apache Software
 29   
  *    Foundation" must not be used to endorse or promote products
 30   
  *    derived from this software without prior written permission. For
 31   
  *    written permission, please contact apache@apache.org.
 32   
  *
 33   
  * 5. Products derived from this software may not be called "Apache"
 34   
  *    nor may "Apache" appear in their names without prior written
 35   
  *    permission of the Apache Group.
 36   
  *
 37   
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 38   
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 39   
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 40   
  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 41   
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 42   
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 43   
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 44   
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 45   
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 46   
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 47   
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 48   
  * SUCH DAMAGE.
 49   
  * ====================================================================
 50   
  *
 51   
  * This software consists of voluntary contributions made by many
 52   
  * individuals on behalf of the Apache Software Foundation.  For more
 53   
  * information on the Apache Software Foundation, please see
 54   
  * <http://www.apache.org/>.
 55   
  *
 56   
  */
 57   
 package org.apache.cactus.util;
 58   
 
 59   
 import java.util.Locale;
 60   
 import java.util.MissingResourceException;
 61   
 import java.util.PropertyResourceBundle;
 62   
 import java.util.ResourceBundle;
 63   
 
 64   
 /**
 65   
  * Utiliy methods related to class loading in a webapp environment.
 66   
  *
 67   
  * @author <a href="mailto:vmassol@apache.org">Vincent Massol</a>
 68   
  *
 69   
  * @version $Id: ClassLoaderUtils.java,v 1.7 2003/05/26 11:45:22 cmlenz Exp $
 70   
  */
 71   
 public class ClassLoaderUtils
 72   
 {
 73   
     /**
 74   
      * Try loading a class first by using the context class loader or by using
 75   
      * the classloader of the referrer class if the context classloader failed
 76   
      * to load the class.
 77   
      *
 78   
      * @param theClassName the name of the test class
 79   
      * @param theReferrer the class will be loaded using the classloader which
 80   
      *        has loaded this referrer class
 81   
      * @return the class object the test class to call
 82   
      * @exception ClassNotFoundException if the class cannot be loaded through
 83   
      *            either classloader
 84   
      */
 85  0
     public static Class loadClass(String theClassName, Class theReferrer)
 86   
         throws ClassNotFoundException
 87   
     {
 88   
         // Get the class to call and build an instance of it.
 89  0
         Class clazz = null;
 90   
 
 91  0
         try
 92   
         {
 93   
             // try loading from webapp classloader first
 94  0
             clazz = loadClassFromWebappClassLoader(theClassName, theReferrer);
 95   
         }
 96   
         catch (Throwable internalException)
 97   
         {
 98   
             // Then try first from Context class loader so that we can put the
 99   
             // Cactus jar as an external library.
 100  0
             clazz = loadClassFromContextClassLoader(theClassName);
 101   
         }
 102   
 
 103  0
         return clazz;
 104   
     }
 105   
 
 106   
     /**
 107   
      * Try loading class using the Context class loader.
 108   
      *
 109   
      * @param theClassName the class to load
 110   
      * @return the <code>Class</code> object for the class to load
 111   
      * @exception ClassNotFoundException if the class cannot be loaded through
 112   
      *            this class loader
 113   
      */
 114  0
     public static Class loadClassFromContextClassLoader(String theClassName)
 115   
         throws ClassNotFoundException
 116   
     {
 117  0
         return Class.forName(theClassName, true, 
 118   
             Thread.currentThread().getContextClassLoader());
 119   
     }
 120   
 
 121   
     /**
 122   
      * Try loading class using the Webapp class loader.
 123   
      *
 124   
      * @param theClassName the class to load
 125   
      * @param theReferrer the class will be loaded using the classloader which
 126   
      *        has loaded this referrer class
 127   
      * @return the <code>Class</code> object for the class to load
 128   
      * @exception ClassNotFoundException if the class cannot be loaded through
 129   
      *            this class loader
 130   
      */
 131  0
     public static Class loadClassFromWebappClassLoader(String theClassName, 
 132   
         Class theReferrer) throws ClassNotFoundException
 133   
     {
 134  0
         return Class.forName(theClassName, true, theReferrer.getClassLoader());
 135   
     }
 136   
 
 137   
     /**
 138   
      * Try loading a resource bundle from either the context class loader or
 139   
      * the
 140   
      *
 141   
      * @param theName the resource bundle name
 142   
      * @param theReferrer the resource bundle will be loaded using the
 143   
      *        classloader which has loaded this referrer class
 144   
      * @return the loaded resource bundle
 145   
      */
 146  0
     public static ResourceBundle loadPropertyResourceBundle(String theName, 
 147   
         Class theReferrer)
 148   
     {
 149  0
         ResourceBundle bundle;
 150   
 
 151  0
         try
 152   
         {
 153   
             // Try to load from the referrer class loader first
 154   
             
 155   
             // Some JDK implementation will return "null" when calling
 156   
             // getClassLoader(), signalling that the classloader is the
 157   
             // bootstrap class loader. However, getBundle() does not support
 158   
             // passing null for the class loader, hence the following test.
 159  0
             if (theReferrer.getClassLoader() == null)
 160   
             {
 161  0
                 bundle = PropertyResourceBundle.getBundle(theName,
 162   
                     Locale.getDefault());
 163   
             }
 164   
             else
 165   
             {                       
 166  0
                 bundle = PropertyResourceBundle.getBundle(theName,
 167   
                     Locale.getDefault(), theReferrer.getClassLoader());
 168   
             }
 169   
         }
 170   
         catch (MissingResourceException e)
 171   
         {
 172   
             // Then, try to load from context classloader
 173  0
             bundle = PropertyResourceBundle.getBundle(theName, 
 174   
                 Locale.getDefault(), 
 175   
                 Thread.currentThread().getContextClassLoader());
 176   
         }
 177   
 
 178  0
         return bundle;
 179   
     }
 180   
 }
 181