org.ros.internal.message.old_style.ServiceMessageDefinitionFactory.java Source code

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Here is the source code for org.ros.internal.message.old_style.ServiceMessageDefinitionFactory.java

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/*
 * Copyright (C) 2011 Google Inc.
 * 
 * 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.ros.internal.message.old_style;

import com.google.common.base.Preconditions;

import org.ros.exception.RosRuntimeException;
import org.ros.internal.message.new_style.ServiceMessageDefinition;
import org.ros.message.Service;

/**
 * @author damonkohler@google.com (Damon Kohler)
 */
public class ServiceMessageDefinitionFactory {

    @SuppressWarnings("unchecked")
    public static ServiceMessageDefinition newFromString(String serviceType) {
        Preconditions.checkArgument(serviceType.split("/").length == 2);
        Class<Service<?, ?>> serviceClass;
        Service<?, ?> service;
        try {
            serviceClass = (Class<Service<?, ?>>) Class.forName("org.ros.service." + serviceType.replace('/', '.'));
            service = serviceClass.newInstance();
        } catch (Exception e) {
            throw new RosRuntimeException(e);
        }
        return new ServiceMessageDefinition(service.getDataType(), service.getMD5Sum());
    }
}