/*
* 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 org.apache.aries.subsystem.core.internal;
import org.apache.aries.subsystem.ContentHandler;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
class CustomResources {
private CustomResources() {
// Only static methods
}
/**
* Find a custom content handler in the context of a given subsystem. Custom content handlers are
* services of type {@link ContentHandler} with the service registration property
* {@link ContentHandler#CONTENT_TYPE_PROPERTY} set to the type being handled.
* @param subsystem The subsystem that provides the context to look up the service.
* @param type The content type to find the handler for.
* @return The Service Reference for the Content Handler for the type or {@code null} if not found.
*/
static ServiceReference<ContentHandler> getCustomContentHandler(BasicSubsystem subsystem, String type) {
try {
for(ServiceReference<ContentHandler> ref :
subsystem.getBundleContext().getServiceReferences(ContentHandler.class,
"(" + ContentHandler.CONTENT_TYPE_PROPERTY + "=" + type + ")")) {
return ref;
}
return null;
} catch (InvalidSyntaxException e) {
throw new RuntimeException(e);
}
}
}