gogo/src/main/java/aQute/shell/osgi/ServiceCommand.java

/*
 * 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 aQute.shell.osgi;

import java.util.*;

import org.osgi.framework.*;
import org.osgi.service.command.*;

import aQute.shell.runtime.*;

public class ServiceCommand extends Reflective implements Function {
	ServiceReference	ref;
	OSGiShell			shell;
	String				name;
	
	public ServiceCommand(OSGiShell shell, ServiceReference ref, String name) {
		this.shell =shell;
		this.ref = ref;
		this.name = name;
	}

	public Object execute(CommandSession session, List<Object> arguments) throws Exception {
		try {
			Object target = shell.bundle.getBundleContext().getService(ref);
			Object result = method(session,target, name, arguments);
			if ( result != CommandShellImpl.NO_SUCH_COMMAND )
				return result;
			
			throw new IllegalArgumentException("Service does not implement promised command " + ref + " " + name );
		} finally {
			shell.bundle.getBundleContext().ungetService(ref);
		}
	}
}