Revision 43 org.gvsig.sextante/trunk/org.gvsig.sextante.app/org.gvsig.sextante.app.algorithm/org.gvsig.sextante.app.algorithm.buffer/src/main/java/org/gvsig/sextante/app/algorithm/buffer/FieldDistance.java

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FieldDistance.java
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package org.gvsig.sextante.app.algorithm.buffer;
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import org.cresques.cts.IProjection;


  		




  
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import org.gvsig.fmap.dal.feature.Feature;


  		




  
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import org.gvsig.sextante.app.extension.core.MapTools;


  		




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/**


  		




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 * Computes a constant size of each geometry built


  		




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 * @author <a href="mailto:nachobrodin@gmail.com">Nacho Brodin</a>


  		




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 */


  		




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public class FieldDistance implements IDistance {


  		




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	private Feature        feature                   = null;


  		




  
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	private int            attributePosition         = 0;


  		




  
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	public FieldDistance(int attributePosition) {


  		




  
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		this.attributePosition = attributePosition;


  		




  
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	}


  		




  
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	public void setFeature(Feature feature) {


  		




  
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		this.feature = feature;


  		




  
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	}


  		




  
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	/*


  		




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	 * (non-Javadoc)


  		




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	 * @see org.gvsig.sextante.app.algorithm.buffer.IDistance#getBufferDistance(double, org.cresques.cts.IProjection, int, int)


  		




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	 */


  		




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	public double getBufferDistance(double distance, IProjection viewProj,


  		




  
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	public double getBufferDistance(double distance, IProjection projection,


  		




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			int distanceUnits, int mapUnits) {


  		




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		return 0;


  		




  
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		double attr = 0D;


  		




  
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		Object obj = feature.get(attributePosition);


  		




  
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		if(obj instanceof Double)


  		




  
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			attr = ((Double)obj).doubleValue();


  		




  
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		else if(obj instanceof Integer) 


  		




  
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			attr = ((Integer)obj).doubleValue();


  		




  
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		else if(obj instanceof Float) 


  		




  
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			attr = ((Float)obj).doubleValue();


  		




  
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		else return 0;


  		




  
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		return MapTools.getInInternalUnits(attr, projection, distanceUnits, mapUnits);


  		




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	}


  		




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}


  		












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