org.apache.ace.location.upnp/src/org/apache/ace/location/upnp/util/Inspector.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 org.apache.ace.location.upnp.util;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Dictionary;
import java.util.List;
import java.util.Properties;

import org.osgi.service.upnp.UPnPAction;
import org.osgi.service.upnp.UPnPService;
import org.osgi.service.upnp.UPnPStateVariable;

public class Inspector
{
	@SuppressWarnings("unused")
    private static UPnPService createService(Class iface, Object target) throws Exception {
		Method[] methods = iface.getMethods();

		List<UPnPAction> list = new ArrayList<UPnPAction>();
		for (Method method : methods) {
			list.add(createAction(method, target));
		}
		return null;
	}

	private static UPnPAction createAction(Method m, Object target) {
		return new UPnPActionImpl(m, target);
	}

	private static class UPnPActionImpl implements UPnPAction {
		private final Method m_method;
		private final Object m_target;

		public UPnPActionImpl(Method m, Object t) {
			m_method = m;
			m_target = t;
		}

		public String getName() {
			return m_method.getName();
		}

		public String[] getInputArgumentNames() {
			Class[] inputArgTypes = m_method.getParameterTypes();
			String[] inputArgs = new String[inputArgTypes.length];

			if (inputArgs.length == 1) {
				inputArgs[0] = inputArgTypes[0].getSimpleName();
			}
			else {
				for (int i = 0; i < inputArgTypes.length; i++) {
					inputArgs[i] = inputArgTypes[i].getSimpleName() + i;
				}
			}
			return inputArgs;
		}

		public String[] getOutputArgumentNames() {
			return new String[]{getReturnArgumentName()};
		}

		public String getReturnArgumentName() {
			Class returnType = m_method.getReturnType();
			return returnType.getSimpleName();
		}

		public UPnPStateVariable getStateVariable(String arg0) {
			// TODO Auto-generated method stub
			return null;
		}

		public Dictionary invoke(Dictionary dict) throws Exception {
			String[] argNames = getInputArgumentNames();
			Object[] args = new Object[argNames.length];

			int i=0;
			for (String name : argNames) {
				args[i++] = dict.get(name);
			}

			Object retVal = m_method.invoke(m_target, args);
			if (retVal==null) {
				return null;
			}

			Properties p = new Properties();
			p.put(getReturnArgumentName(), retVal);
			return p;
		}
	}
}