/*
* 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.felix.gogo.commands.basic;
import java.util.Hashtable;
import org.osgi.framework.ServiceRegistration;
import org.osgi.framework.BundleContext;
import org.osgi.service.command.Function;
import org.apache.felix.gogo.commands.Action;
import org.apache.felix.gogo.commands.Command;
/**
* A very simple {@link Function} which creates {@link Action} based on a class name.
*/
public class SimpleCommand extends AbstractCommand {
private Class<? extends Action> actionClass;
public SimpleCommand()
{
}
public SimpleCommand(Class<? extends Action> actionClass)
{
this.actionClass = actionClass;
}
public Class<? extends Action> getActionClass()
{
return actionClass;
}
public void setActionClass(Class<? extends Action> actionClass)
{
this.actionClass = actionClass;
}
public Action createNewAction() {
try {
return actionClass.newInstance();
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
public static ServiceRegistration export(BundleContext context, Class<? extends Action> actionClass)
{
Command cmd = actionClass.getAnnotation(Command.class);
if (cmd == null)
{
throw new IllegalArgumentException("Action class is not annotated with @Command");
}
Hashtable props = new Hashtable();
props.put("osgi.command.scope", cmd.scope());
props.put("osgi.command.function", cmd.name());
SimpleCommand command = new SimpleCommand(actionClass);
return context.registerService(Function.class.getName(), command, props);
}
}