package com.ximple.io.dgn7;
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import org.apache.log4j.Logger;
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import com.vividsolutions.jts.geom.Geometry;
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import com.vividsolutions.jts.geom.GeometryFactory;
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import com.vividsolutions.jts.geom.LinearRing;
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import com.vividsolutions.jts.geom.Coordinate;
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/**
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* ShapeElement
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*
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* @author Ulysses
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* @version 0.1
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* @since 2006/5/18 下午 03:08:43
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*/
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public class ShapeElement extends LineStringElement implements GeometryConverter
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{
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private static final Logger logger = Logger.getLogger(ShapeElement.class);
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public ShapeElement(byte[] raw)
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{
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super(raw);
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}
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public Coordinate[] getVertices()
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{
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Coordinate[] result = super.getVertices();
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if ((result != null) && (result.length > 2))
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{
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boolean isClosed = result[0].equals2D(result[result.length - 1]);
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if (!isClosed)
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{
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double distance = result[0].distance(result[result.length - 1]);
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if (distance < 0.00210)
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{
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result[result.length - 1] = new Coordinate(result[0]);
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} else
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{
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logger.info("Shape is not closed. distance=" + distance);
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logger.debug("result[0]=" + result[0].toString());
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logger.debug("result[length - 1]=" + result[result.length - 1]);
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}
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}
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}
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return result;
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}
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public Geometry toGeometry(GeometryFactory factory)
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{
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try
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{
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LinearRing ring = factory.createLinearRing(this.getVertices());
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return factory.createPolygon(ring, null);
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} catch (IllegalArgumentException e)
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{
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logger.warn(e.getMessage(), e);
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return null;
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}
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}
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public static class ElementHandler extends Element.ElementHandler
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{
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private static ElementHandler instance = null;
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public ElementHandler()
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{
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super(ElementType.SHAPE);
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}
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public static IElementHandler getInstance()
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{
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if (instance == null)
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{
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instance = new ElementHandler();
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}
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return instance;
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}
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protected Element createElement(byte[] raw)
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{
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return new ShapeElement(raw);
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}
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}
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}
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