root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / gridCategorical / reclassifyDisjoint / ReclassifyDisjointAlgorithm.java @ 59
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1 | 59 | nbrodin | package es.unex.sextante.gridCategorical.reclassifyDisjoint; |
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2 | |||
3 | import java.awt.Point; |
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4 | import java.util.ArrayList; |
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5 | |||
6 | import es.unex.sextante.core.GeoAlgorithm; |
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7 | import es.unex.sextante.core.Sextante; |
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8 | import es.unex.sextante.dataObjects.IRasterLayer; |
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9 | import es.unex.sextante.exceptions.GeoAlgorithmExecutionException; |
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10 | import es.unex.sextante.exceptions.RepeatedParameterNameException; |
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11 | |||
12 | public class ReclassifyDisjointAlgorithm |
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13 | extends
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14 | GeoAlgorithm { |
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15 | |||
16 | private final static int m_iOffsetX[] = { 0, 1, 1, 1, 0, -1, -1, -1 }; |
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17 | private final static int m_iOffsetY[] = { 1, 1, 0, -1, -1, -1, 0, 1 }; |
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18 | |||
19 | public static final String INPUT = "INPUT"; |
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20 | public static final String RECLASS = "RECLASS"; |
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21 | |||
22 | int m_iNX, m_iNY;
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23 | IRasterLayer m_Window; |
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24 | IRasterLayer m_Result; |
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25 | boolean m_IsCellAlreadyVisited[][]; |
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26 | |||
27 | |||
28 | @Override
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29 | public void defineCharacteristics() { |
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30 | |||
31 | setName(Sextante.getText("Reclassify_into_disjoint_classes"));
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32 | setGroup(Sextante.getText("Reclassify_raster_layers"));
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33 | setUserCanDefineAnalysisExtent(true);
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34 | |||
35 | try {
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36 | m_Parameters.addInputRasterLayer(INPUT, Sextante.getText("Layer"), true); |
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37 | addOutputRasterLayer(RECLASS, Sextante.getText("Reclassify"));
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38 | } |
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39 | catch (final RepeatedParameterNameException e) { |
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40 | Sextante.addErrorToLog(e); |
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41 | } |
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42 | |||
43 | } |
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44 | |||
45 | |||
46 | @Override
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47 | public boolean processAlgorithm() throws GeoAlgorithmExecutionException { |
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48 | |||
49 | int x, y;
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50 | int iClass = 0; |
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51 | |||
52 | m_Window = m_Parameters.getParameterValueAsRasterLayer(INPUT); |
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53 | |||
54 | m_Result = getNewRasterLayer(RECLASS, m_Window.getName() + Sextante.getText("[reclassified]"),
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55 | IRasterLayer.RASTER_DATA_TYPE_INT); |
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56 | |||
57 | m_Result.assignNoData(); |
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58 | |||
59 | m_Window.setWindowExtent(m_Result); |
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60 | m_Window.setInterpolationMethod(IRasterLayer.INTERPOLATION_NearestNeighbour); |
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61 | |||
62 | m_iNX = m_Window.getNX(); |
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63 | m_iNY = m_Window.getNY(); |
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64 | |||
65 | m_IsCellAlreadyVisited = new boolean[m_iNX][m_iNY]; |
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66 | |||
67 | for (y = 0; (y < m_iNY) && setProgress(y, m_iNY); y++) { |
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68 | for (x = 0; x < m_iNX; x++) { |
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69 | final double dValue = m_Window.getCellValueAsDouble(x, y); |
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70 | if (!m_Window.isNoDataValue(dValue)) {
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71 | if (!m_IsCellAlreadyVisited[x][y]) {
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72 | iClass++; |
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73 | setClass(x, y, iClass); |
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74 | } |
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75 | } |
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76 | } |
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77 | } |
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78 | |||
79 | return !m_Task.isCanceled();
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80 | |||
81 | |||
82 | } |
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83 | |||
84 | |||
85 | private void setClass(int x, |
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86 | int y,
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87 | final int iNewClass) { |
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88 | |||
89 | int x2, y2;
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90 | int iInitClass;
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91 | int iPt;
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92 | int n;
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93 | int iClass;
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94 | ArrayList centralPoints = new ArrayList(); |
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95 | ArrayList adjPoints = new ArrayList(); |
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96 | Point point;
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97 | |||
98 | iInitClass = m_Window.getCellValueAsInt(x, y); |
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99 | |||
100 | centralPoints.add(new Point(x, y)); |
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101 | m_IsCellAlreadyVisited[x][y] = true;
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102 | |||
103 | while (centralPoints.size() != 0) { |
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104 | for (iPt = 0; iPt < centralPoints.size(); iPt++) { |
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105 | point = (Point) centralPoints.get(iPt);
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106 | x = point.x; |
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107 | y = point.y; |
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108 | iClass = m_Window.getCellValueAsInt(x, y); |
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109 | if (!m_Window.isNoDataValue(iClass)) {
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110 | for (n = 0; n < 8; n++) { |
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111 | x2 = x + m_iOffsetX[n]; |
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112 | y2 = y + m_iOffsetY[n]; |
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113 | iClass = m_Window.getCellValueAsInt(x2, y2); |
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114 | if (!m_Window.isNoDataValue(iClass)) {
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115 | if (m_IsCellAlreadyVisited[x2][y2] == false) { |
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116 | if (iInitClass == iClass) {
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117 | m_IsCellAlreadyVisited[x2][y2] = true;
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118 | m_Result.setCellValue(x2, y2, iNewClass); |
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119 | adjPoints.add(new Point(x2, y2)); |
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120 | |||
121 | } |
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122 | } |
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123 | } |
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124 | } |
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125 | } |
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126 | } |
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127 | |||
128 | centralPoints = adjPoints; |
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129 | adjPoints = new ArrayList(); |
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130 | |||
131 | if (m_Task.isCanceled()) {
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132 | return;
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133 | } |
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134 | |||
135 | } |
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136 | |||
137 | } |
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138 | |||
139 | } |