/**
* Copyright (C) 2013 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* Licensed 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 io.hawt.blueprint;
import io.hawt.util.introspect.ClassLoaderProvider;
import io.hawt.util.introspect.ClassLoaderProviders;
import io.hawt.introspect.Introspector;
import org.osgi.service.blueprint.container.BlueprintContainer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.util.Set;
/**
* Discovers available ClassLoaders for injecting into the Introspector
*/
public class ClassLoaderDiscovery {
private static final transient Logger LOG = LoggerFactory.getLogger(ClassLoaderDiscovery.class);
private Introspector introspector;
private BlueprintContainer blueprintContainer;
public ClassLoaderDiscovery() {
}
public void init() {
LOG.info("Invoked with introspector " + introspector + " and container: " + blueprintContainer);
if (introspector != null && blueprintContainer != null) {
Set<String> componentIds = blueprintContainer.getComponentIds();
// TODO would be nice to query classes available or something...
String jaxbId = "jaxbDataFormat";
ClassLoaderProvider classLoaderProvider = null;
if (componentIds.contains(jaxbId)) {
Object instance = blueprintContainer.getComponentInstance(jaxbId);
if (instance != null) {
LOG.info("Found dynamic JAXB DataFormat: " + instance);
try {
Method method = instance.getClass().getMethod("getClassLoader");
classLoaderProvider = ClassLoaderProviders.createReflectionProvider(instance, method);
} catch (Exception e) {
LOG.info("Could not find getClassLoader() on " + instance + ". " + e, e);
}
}
} else {
LOG.info("Could not find blueprint componentId: '" + jaxbId + "' but had IDs: " + componentIds);
}
introspector.setClassLoaderProvider(jaxbId, classLoaderProvider);
LOG.info("Setting class loader " + jaxbId + " to " + classLoaderProvider);
}
}
public void destroy() {
}
public Introspector getIntrospector() {
return introspector;
}
public void setIntrospector(Introspector introspector) {
this.introspector = introspector;
}
public BlueprintContainer getBlueprintContainer() {
return blueprintContainer;
}
public void setBlueprintContainer(BlueprintContainer blueprintContainer) {
this.blueprintContainer = blueprintContainer;
}
}