package com.atlassian.activeobjects.osgi;
   
   import com.google.common.base.Function;
   import org.osgi.framework.Bundle;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   class LoadClassFromBundleFunction implements Function<String, Class> {
       private final Bundle bundle;
  
      LoadClassFromBundleFunction(Bundle bundle) {
          this.bundle = checkNotNull(bundle);
      }
  
      @Override
      public Class<?> apply(String className) {
          try {
              return bundle.loadClass(className);
          } catch (ClassNotFoundException e) {
              throw new IllegalStateException("How did this happen? We're loading class '" + className + "'from the " + bundle, e);
          }
      }
  }