/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.component.cxf.blueprint.bus;

import java.util.Dictionary;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.aries.blueprint.NamespaceHandler;
import org.apache.cxf.common.logging.LogUtils;
import org.osgi.framework.BundleContext;

public final class NamespaceHandlerRegisterer {
    private static final Logger LOG = LogUtils.getL7dLogger(NamespaceHandlerRegisterer.class);

    private NamespaceHandlerRegisterer() {
    }

    public static void register(BundleContext bc, BlueprintNameSpaceHandlerFactory factory,
                                String... namespaces) {
        try {
            Object handler = factory.createNamespaceHandler();
            for (String namespace : namespaces) {
                Dictionary<String, String> properties = new Hashtable<>();
                properties.put("osgi.service.blueprint.namespace", namespace);
                bc.registerService(NamespaceHandler.class.getName(), handler, properties);
                LOG.fine("Registered blueprint namespace handler for " + namespace);
            }
        } catch (NoClassDefFoundError e) {
            LOG.log(Level.INFO, "Aries Blueprint packages not available. So namespaces will not be registered");
        } catch (Throwable e) {
            LOG.log(Level.WARNING, "Unexpected exception when trying to install Aries Blueprint namespaces", e);
        }
    }

}
