gvsig-geoprocess / org.gvsig.geoprocess / trunk / org.gvsig.geoprocess / org.gvsig.geoprocess.algorithm / org.gvsig.geoprocess.algorithm.buffer / src / main / java / org / gvsig / geoprocess / algorithm / buffer / FieldDistance.java @ 1105
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2012 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.geoprocess.algorithm.buffer; |
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import org.cresques.cts.IProjection; |
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/**
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* Computes a constant size of each geometry built
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*
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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 extends AbstractDistance { |
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private String attributeName = null; |
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public FieldDistance(String attributeName) { |
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this.attributeName = attributeName;
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} |
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public double getBufferDistance(IProjection projection, int distanceUnits, int mapUnits) { |
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double value = 0D; |
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Object obj = feature.get(attributeName);
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if (obj instanceof Number) { |
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value = ((Number) obj).doubleValue();
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} else {
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return 0; |
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} |
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return getInInternalUnits(value, projection, distanceUnits, mapUnits) * numberOfRings;
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} |
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} |