svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.tools.evaluator.sqljep / src / main / java / org / gvsig / tools / evaluator / sqljep / function / GeomFromText.java @ 41610
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1 | 40560 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40435 | jjdelcerro | *
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4 | 40560 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40435 | jjdelcerro | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | 40560 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40435 | jjdelcerro | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | 40560 | jjdelcerro | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | 40435 | jjdelcerro | */
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24 | /*
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25 | * AUTHORS (In addition to CIT):
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26 | * 2008 IVER T.I. S.A. {{Task}}
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27 | */
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28 | |||
29 | package org.gvsig.tools.evaluator.sqljep.function; |
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30 | |||
31 | import org.gvsig.fmap.geom.Geometry; |
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32 | import org.gvsig.fmap.geom.GeometryException; |
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33 | import org.gvsig.fmap.geom.GeometryLocator; |
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34 | import org.gvsig.fmap.geom.GeometryManager; |
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35 | import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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36 | import org.gvsig.tools.locator.LocatorException; |
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37 | import org.medfoster.sqljep.ASTFunNode; |
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38 | import org.medfoster.sqljep.JepRuntime; |
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39 | import org.medfoster.sqljep.ParseException; |
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40 | import org.medfoster.sqljep.function.PostfixCommand; |
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41 | import org.slf4j.Logger; |
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42 | import org.slf4j.LoggerFactory; |
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43 | |||
44 | public class GeomFromText extends PostfixCommand { |
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45 | private static final GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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46 | private static final Logger logger = LoggerFactory.getLogger(GeomFromText.class); |
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47 | |||
48 | private static Object lock = new Object(); |
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49 | |||
50 | public static final String NAME = "GeomFromText"; |
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51 | private static String lastTextGeometry=""; |
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52 | private static String lastSRS=""; |
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53 | private static Geometry lastGeometry=null; |
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54 | |||
55 | final public int getNumberOfParameters() { |
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56 | return 2; |
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57 | } |
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58 | |||
59 | public GeomFromText() {
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60 | super();
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61 | } |
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62 | |||
63 | /*
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64 | * (non-Javadoc)
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65 | *
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66 | * @see org.medfoster.sqljep.function.PostfixCommand#evaluate(org.medfoster.sqljep.ASTFunNode,
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67 | * org.medfoster.sqljep.JepRuntime)
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68 | */
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69 | public void evaluate(ASTFunNode node, JepRuntime runtime) |
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70 | throws ParseException { |
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71 | node.childrenAccept(runtime.ev, null);
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72 | String srs = (String) runtime.stack.pop(); |
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73 | String text = (String) runtime.stack.pop(); |
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74 | runtime.stack.push(geometryFromText(text, srs)); |
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75 | } |
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76 | |||
77 | private static Geometry geometryFromText(String text, String srs) |
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78 | throws ParseException { |
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79 | if (!lastTextGeometry.equals(text) || !lastSRS.equals(srs)) {
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80 | try {
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81 | lastGeometry = geomManager.createFrom(text, srs); |
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82 | } catch (CreateGeometryException e) {
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83 | throw new ParseException(NAME, e); |
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84 | } catch (LocatorException e) {
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85 | throw new ParseException(NAME, e); |
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86 | } catch (GeometryException e) {
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87 | throw new ParseException(NAME, e); |
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88 | } |
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89 | lastTextGeometry = text; |
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90 | lastSRS = srs; |
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91 | } |
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92 | return lastGeometry;
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93 | } |
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94 | } |