/scalate-core/src/main/scala/org/fusesource/scalate/osgi/BundleClassLoader.scala

http://github.com/scalate/scalate · Scala · 43 lines · 19 code · 4 blank · 20 comment · 4 complexity · 7afa934025441b4d91cd8ac52d00845e MD5 · raw file

  1. /**
  2. * Copyright (C) 2009-2011 the original author or authors.
  3. * See the notice.md file distributed with this work for additional
  4. * information regarding copyright ownership.
  5. *
  6. * Licensed under the Apache License, Version 2.0 (the "License");
  7. * you may not use this file except in compliance with the License.
  8. * You may obtain a copy of the License at
  9. *
  10. * http://www.apache.org/licenses/LICENSE-2.0
  11. *
  12. * Unless required by applicable law or agreed to in writing, software
  13. * distributed under the License is distributed on an "AS IS" BASIS,
  14. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15. * See the License for the specific language governing permissions and
  16. * limitations under the License.
  17. */
  18. package org.fusesource.scalate.osgi
  19. import org.osgi.framework.Bundle
  20. /**
  21. * A helper class to determine if the class loader provides access to an OSGi Bundle instance
  22. */
  23. object BundleClassLoader {
  24. type BundleClassLoader = {
  25. def getBundle: Bundle
  26. }
  27. def unapply(ref: AnyRef): Option[BundleClassLoader] = {
  28. if (ref == null) return None
  29. try {
  30. val method = ref.getClass.getMethod("getBundle")
  31. if (method.getReturnType == classOf[Bundle])
  32. Some(ref.asInstanceOf[BundleClassLoader])
  33. else
  34. None
  35. } catch {
  36. case e: NoSuchMethodException => None
  37. }
  38. }
  39. }