package org.simantics.proconf.g3d.base;

import java.util.Collection;

import org.simantics.layer0.utils.IEntity;
import org.simantics.proconf.g3d.Resources;
import org.simantics.proconf.g3d.stubs.Appearance;

import com.jme.renderer.Renderer;
import com.jme.scene.state.RenderState;

public class DefaultAppearanceProvider implements AppearanceProvider {
	
	

	@Override
	public boolean canHandle(IEntity instance) {
		return instance.hasStatement(Resources.g3dResource.HasAppearance);
	}
	
	@Override
	public Collection<RenderState> getAppearanceFromResource(IEntity instance, Renderer renderer) {
		Collection<IEntity> appearanceResource;
        if ((appearanceResource = instance.getRelatedObjects(Resources.g3dResource.HasAppearance)) != null && appearanceResource.size() > 0) {
            return AppearanceTools.getAppearance(new Appearance(instance.getGraph(),appearanceResource.iterator().next().getResource()), renderer);
        }
        throw new RuntimeException("Given instance does not have Appearance definition!");
	}
}