GraphicalViewPolicy.java

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 * Mission Control Technologies, Copyright (c) 2009-2012, United States Government
 * as represented by the Administrator of the National Aeronautics and Space 
 * Administration. All rights reserved.
 *
 * The MCT platform is 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.
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 * License for the specific language governing permissions and limitations under 
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package gov.nasa.arc.mct.graphics;

import gov.nasa.arc.mct.components.AbstractComponent;
import gov.nasa.arc.mct.components.FeedProvider;
import gov.nasa.arc.mct.graphics.component.GraphicalComponent;
import gov.nasa.arc.mct.graphics.view.GraphicalManifestation;
import gov.nasa.arc.mct.graphics.view.StaticGraphicalView;
import gov.nasa.arc.mct.policy.ExecutionResult;
import gov.nasa.arc.mct.policy.Policy;
import gov.nasa.arc.mct.policy.PolicyContext;
import gov.nasa.arc.mct.services.component.ViewInfo;

public class GraphicalViewPolicy implements Policy {
	public GraphicalViewPolicy() {}
	
	private static boolean hasFeed(AbstractComponent component) {
		return component.getCapability(FeedProvider.class)  != null;
	}
	
	@Override
	public ExecutionResult execute(PolicyContext context) {
		boolean result = true;
		ViewInfo viewInfo = context.getProperty(PolicyContext.PropertyName.TARGET_VIEW_INFO.getName(), ViewInfo.class);
		
		
		if (GraphicalManifestation.class.equals(viewInfo.getViewClass())) {
			AbstractComponent targetComponent = context.getProperty(PolicyContext.PropertyName.TARGET_COMPONENT.getName(), AbstractComponent.class);
			result = hasFeed(targetComponent);
		} else if (StaticGraphicalView.class.equals(viewInfo.getViewClass())) {
			AbstractComponent targetComponent = context.getProperty(PolicyContext.PropertyName.TARGET_COMPONENT.getName(), AbstractComponent.class);
			result = GraphicalComponent.class.isAssignableFrom(targetComponent.getClass()); 
		}

		return new ExecutionResult(context, result, null);
	}


}