root / org.gvsig.expressionfield / trunk / org.gvsig.expressionfield / src / main / java / org / gvsig / expressionfield / project / documents / table / operators / Perimeter.java @ 30
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/**
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* *****************************************************************************
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*
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 3 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us at info AT
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* gvsig.com, or visit our website www.gvsig.com.
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*
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******************************************************************************
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*/
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package org.gvsig.expressionfield.project.documents.table.operators; |
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import java.awt.geom.Point2D; |
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import java.util.ArrayList; |
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import org.apache.bsf.BSFException; |
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import org.apache.bsf.BSFManager; |
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import org.gvsig.andami.PluginServices; |
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import org.gvsig.andami.messages.NotificationManager; |
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import org.gvsig.expressionfield.ExpressionFieldExtension; |
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import org.gvsig.expressionfield.project.documents.table.GraphicOperator; |
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import org.gvsig.expressionfield.project.documents.table.IOperator; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.mapcontext.MapContext; |
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import org.gvsig.fmap.mapcontext.ViewPort; |
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/**
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* @author Vicente Caballero Navarro
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*/
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public class Perimeter extends GraphicOperator { |
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public String addText(String s) { |
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return s.concat(toString() + "()"); |
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} |
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public double process(Feature feature) { |
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// ReadableVectorial adapter = getLayer().getSource();
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org.gvsig.fmap.geom.Geometry geom = null;
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geom = feature.getDefaultGeometry();//adapter.getShape(index.get());
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ArrayList parts = getXY(geom);
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double perimeter = 0; |
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for (int j = 0; j < parts.size(); j++) { |
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Double[][] xsys = (Double[][]) parts.get(j);//getXY(geom); |
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double dist = 0; |
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double distAll = 0; |
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ViewPort vp = getLayer().getMapContext().getViewPort(); |
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for (int i = 0; i < (xsys[0].length - 1); i++) { |
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dist = 0;
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Point2D p = new Point2D.Double(xsys[0][i].doubleValue(), xsys[1][i].doubleValue());//vp.toMapPoint(new Point(event.getXs()[i].intValue(), event.getYs()[i].intValue())); |
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Point2D p2 = new Point2D.Double(xsys[0][i + 1].doubleValue(), xsys[1][i + 1].doubleValue());//vp.toMapPoint(new Point(event.getXs()[i + 1].intValue(), event.getYs()[i + 1].intValue())); |
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dist = vp.distanceWorld(p, p2); |
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//System.out.println("distancia parcial = "+dist);
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distAll += dist; |
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} |
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int distanceUnits = vp.getDistanceUnits();
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perimeter += distAll / MapContext.getDistanceTrans2Meter()[distanceUnits]; |
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} |
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return perimeter;
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} |
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public void eval(BSFManager interpreter) throws BSFException { |
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interpreter.declareBean("jperimeter", this, Perimeter.class); |
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// interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"double perimeter(){return jperimeter.process(indexRow);};");
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interpreter.exec(ExpressionFieldExtension.JYTHON, null, -1, -1, "def perimeter():\n" |
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+ " return jperimeter.process(featureContainer.getFeature())");
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} |
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public String toString() { |
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return "perimeter"; |
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} |
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public boolean isEnable() { |
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if (getLayer() == null) { |
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return false; |
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} |
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int geomType = org.gvsig.fmap.geom.Geometry.TYPES.POINT;
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try {
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FeatureStore store = getLayer().getFeatureStore(); |
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geomType = store.getDefaultFeatureType().getAttributeDescriptor(store.getDefaultFeatureType().getDefaultGeometryAttributeIndex()).getGeometryType(); |
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} catch (DataException e) {
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NotificationManager.addError(e); |
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} |
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return (getType() == IOperator.NUMBER
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&& (geomType == org.gvsig.fmap.geom.Geometry.TYPES.SURFACE |
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|| geomType == org.gvsig.fmap.geom.Geometry.TYPES.MULTISURFACE |
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|| geomType == org.gvsig.fmap.geom.Geometry.TYPES.CURVE |
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|| geomType == org.gvsig.fmap.geom.Geometry.TYPES.MULTICURVE)); |
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} |
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public String getTooltip() { |
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return PluginServices.getText(this, "operator") + ": " + addText("") + "\n" + getDescription(); |
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} |
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public String getDescription() { |
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return PluginServices.getText(this, "returns") + ": " |
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+ PluginServices.getText(this, "numeric_value") + "\n" |
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+ PluginServices.getText(this, "description") + ": " |
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+ "Returns the perimeter of polygon or line geometry of this row in the units of the view.";
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} |
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} |