/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.core.osgi.utils;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.Enumeration;
import java.util.Map;
import java.util.Properties;
import java.util.SortedMap;
import java.util.TreeMap;
import org.apache.camel.CamelContext;
import org.apache.camel.util.CamelContextHelper;
import org.apache.camel.util.LoadPropertiesException;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
/**
* Helper class
*/
public final class BundleContextUtils {
private BundleContextUtils() {
}
/**
* Retrieve the BundleContext that the given class has been loaded from.
*
* @param clazz the class to find the bundle context from
* @return the bundle context or <code>null</code> if it can't be found
*/
public static BundleContext getBundleContext(Class<?> clazz) {
// Ideally we should use FrameworkUtil.getBundle(clazz).getBundleContext()
// but that does not exist in OSGi 4.1, so until we upgrade, we keep that one
try {
ClassLoader cl = clazz.getClassLoader();
Class<?> clClazz = cl.getClass();
Method mth = null;
while (clClazz != null) {
try {
mth = clClazz.getDeclaredMethod("getBundle");
break;
} catch (NoSuchMethodException e) {
// Ignore
}
clClazz = clClazz.getSuperclass();
}
if (mth != null) {
mth.setAccessible(true);
return ((Bundle) mth.invoke(cl)).getBundleContext();
}
} catch (Throwable t) {
// Ignore
}
return null;
}
/**
* Finds the components available on the bundle context and camel context
*/
public static Map<String, Properties> findComponents(BundleContext bundleContext, CamelContext camelContext)
throws IOException, LoadPropertiesException {
SortedMap<String, Properties> answer = new TreeMap<String, Properties>();
Bundle[] bundles = bundleContext.getBundles();
for (Bundle bundle : bundles) {
Enumeration<URL> iter = bundle.getResources(CamelContextHelper.COMPONENT_DESCRIPTOR);
SortedMap<String, Properties> map = CamelContextHelper.findComponents(camelContext, iter);
answer.putAll(map);
}
return answer;
}
}