opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/impl/util/ClassLoaderUtils.java

   1 package org.opendaylight.controller.sal.binding.impl.util;
   2
   3
   4
   5 import java.util.concurrent.Callable;
   6
   7 import static com.google.common.base.Preconditions.*;
   8
   9 import java.lang.reflect.Constructor;
  10 import java.lang.reflect.InvocationTargetException;
  11 import java.util.ArrayList;
  12
  13 public class ClassLoaderUtils {
  14
  15     public static <V> V withClassLoader(ClassLoader cls,Callable<V> function) throws Exception {
  16         checkNotNull(cls);
  17         checkNotNull(function);
  18         ClassLoader oldCls = Thread.currentThread().getContextClassLoader();
  19         try {
  20             Thread.currentThread().setContextClassLoader(cls);
  21             V result = function.call();
  22             Thread.currentThread().setContextClassLoader(oldCls);
  23             return result;
  24         } catch (Exception e) {
  25             Thread.currentThread().setContextClassLoader(oldCls);
  26             throw new Exception(e);
  27         }
  28     }
  29
  30     public static Object construct(Constructor<? extends Object> constructor, ArrayList<Object> objects) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
  31     Object[] initargs = objects.toArray(new Object[]{});
  32     return constructor.newInstance(initargs);
  33     }
  34
  35
  36     public static Class<?> loadClassWithTCCL(String name) throws ClassNotFoundException {
  37         return Thread.currentThread().getContextClassLoader().loadClass(name);
  38     }
  39 }