package org.andromda.maven.plugin.configuration;
   
   import java.net.URL;
   import java.net.URLClassLoader;
   
   /**
    * A custom class loader necessary to avoid class loading errors
    * when running within Maven2.
    *
   * @author Chad Brandon
   */
  public class ConfigurationClassLoader
      extends URLClassLoader
  {
      /**
       * @param urls
       * @param parent
       */
      public ConfigurationClassLoader(
          final URL[] urls,
          final ClassLoader parent)
      {
          super(urls, parent);
      }
  
      /**
       * @see ClassLoader#loadClass(String)
       */
      public Class loadClass(final String name)
          throws ClassNotFoundException
      {
          return this.loadClass(
              name,
              false);
      }
  
      /**
       * @see ClassLoader#loadClass(String, boolean)
       */
      protected synchronized Class loadClass(
          final String name,
          final boolean resolve)
          throws ClassNotFoundException
      {
          // - first, we check if the class has already been loaded
          Class loadedClass = this.findLoadedClass(name);
  
          // - if we could not find it, try to find it in the parent
          if (loadedClass == null)
          {
              final ClassLoader parent = this.getParent();
              if (parent != null)
              {
                  try
                  {
                      loadedClass = parent.loadClass(name);
                  }
                  catch (final ClassNotFoundException exception)
                  {
                      // - ignore
                  }
              }
              else
              {
                  loadedClass = getSystemClassLoader().loadClass(name);
              }
          }
  
          // - if not loaded from the parent, search this classloader
          if (loadedClass == null)
          {
              loadedClass = findClass(name);
          }
  
          if (resolve)
          {
              this.resolveClass(loadedClass);
          }
  
          return loadedClass;
      }
  }