PortrayalUtil.java

/*
 *    Constellation - An open source and standard compliant SDI
 *    http://www.constellation-sdi.org
 *
 * Copyright 2014 Geomatys.
 *
 * 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.constellation.portrayal;

import org.constellation.provider.Data;
import org.geotoolkit.display.PortrayalException;
import org.geotoolkit.map.MapBuilder;
import org.geotoolkit.map.MapContext;
import org.geotoolkit.map.MapItem;
import org.geotoolkit.map.MapLayer;
import org.geotoolkit.style.MutableStyle;

import java.util.Collections;
import java.util.List;
import java.util.Map;


/**
 * Utility methods for the Portrayal system.
 * <p>
 * <b>Waring</b><br/>
 * None of these methods are currently used. This class is currently a
 * place holder and may be removed soon.
 * </p>
 *
 * @author Adrian Custer (Geomatys)
 * @since 0.3
 *
 */
public final class PortrayalUtil {


    public static MapContext createContext(Data layerRef, MutableStyle styleRef,
            Map<String,Object> renderingParameters) throws PortrayalException{
        return createContext(Collections.singletonList(layerRef),
                 Collections.singletonList(styleRef),
                 renderingParameters);

    }

    public static MapContext createContext(List<Data> layerRefs, List<MutableStyle> styleRefs,
            Map<String,Object> renderingParameters ) throws PortrayalException {

    	assert ( layerRefs.size() == styleRefs.size() );
        final MapContext context = MapBuilder.createContext();

        for (int i = 0; i < layerRefs.size(); i++) {
            final Data layerRef = layerRefs.get(i);
            final MutableStyle style = styleRefs.get(i);

            assert (null != layerRef);
            //style can be null

            final MapItem mapLayer = layerRef.getMapLayer(style, renderingParameters);
            if (mapLayer == null) {
                throw new PortrayalException("Could not create a mapLayer for layer: " + layerRef.getName());
            }
            if(mapLayer instanceof MapLayer){
                ((MapLayer)mapLayer).setSelectable(true);
            }
            mapLayer.setVisible(true);
            context.items().add(mapLayer);
        }

        return context;
    }

    //Don't allow instantiation
    private PortrayalUtil() {
    }
}