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

 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 */
18package org.fusesource.scalate.osgi
19
20import org.osgi.framework.Bundle
21
22/**
23 * A helper class to determine if the class loader provides access to an OSGi Bundle instance
24 */
25object BundleClassLoader {
26
27  type BundleClassLoader = {
28    def getBundle: Bundle
29  }
30
31  def unapply(ref: AnyRef): Option[BundleClassLoader] = {
32    if (ref == null) return None
33    try {
34      val method = ref.getClass.getMethod("getBundle")
35      if (method.getReturnType == classOf[Bundle])
36        Some(ref.asInstanceOf[BundleClassLoader])
37      else
38        None
39    } catch {
40      case e: NoSuchMethodException => None
41    }
42  }
43}