Package org.locationtech.udig.project.internal.impl

Source Code of org.locationtech.udig.project.internal.impl.SetStyleInterceptor

/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.project.internal.impl;


import org.locationtech.udig.catalog.IGeoResource;
import org.locationtech.udig.project.interceptor.LayerInterceptor;
import org.locationtech.udig.project.internal.Layer;
import org.locationtech.udig.project.internal.SetDefaultStyleProcessor;

/**
* Sets the default style of the layer.
*
* @author Jesse
* @since 1.1.0
*/
public class SetStyleInterceptor implements LayerInterceptor {

    public void run( Layer layer ) {
        if( layer.getStyleBlackboard().getContent().isEmpty()){
            IGeoResource geoResource = layer.getGeoResource();
            if( geoResource == null ){
                throw new NullPointerException("Layer requires GeoResource to determine default style");
            }
            SetDefaultStyleProcessor defaultStyleProcessor = createDefaultStyles(geoResource, layer);
            defaultStyleProcessor.run();
        }
    }

    /**
     * Creates a default style from each styleContent extension and puts them on the style blackboard of the layer.
     * @param theResource
     * @param theLayer
     * @return
     */
    private SetDefaultStyleProcessor createDefaultStyles( final IGeoResource theResource, final Layer theLayer ) {
        SetDefaultStyleProcessor scp = new SetDefaultStyleProcessor(theResource, theLayer);
        return scp;
    }

}
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