root / branches / Mobile_Compatible_Hito_1 / libFMap_mobile_shp_driver / src-file / org / gvsig / data / datastores / vectorial / file / shp_mem / simplify / ShapeFileHeader.java @ 22037
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1 | 21865 | jldominguez | package org.gvsig.data.datastores.vectorial.file.shp_mem.simplify; |
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2 | |||
3 | import java.io.IOException; |
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4 | import java.nio.ByteOrder; |
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5 | |||
6 | import org.apache.log4j.Logger; |
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7 | 22037 | jldominguez | import org.gvsig.data.datastores.vectorial.file.shp_util.FalseByteBuffer; |
8 | 21865 | jldominguez | import org.gvsig.datasources.common.IByteBuffer; |
9 | |||
10 | /**
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11 | * Class to represent the header in the shape file.
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12 | */
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13 | public class ShapeFileHeader { |
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14 | |||
15 | /**
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16 | * Shape Type Value Shape Type 0 Null Shape 1 Point 3 PolyLine 5 Polygon 8
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17 | * MultiPoint 11 PointZ 13 PolyLineZ 15 PolygonZ 18 MultiPointZ 21 PointM 23
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18 | * PolyLineM 25 PolygonM 28 MultiPointM 31 MultiPatch
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19 | */
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20 | |||
21 | /* The null shape type, there is no shape for this record. */
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22 | public static final int SHAPE_NULL = 0; |
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23 | |||
24 | public static final int SHAPE_POINT = 1; |
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25 | |||
26 | public static final int SHAPE_POLYLINE = 3; |
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27 | |||
28 | public static final int SHAPE_POLYGON = 5; |
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29 | |||
30 | public static final int SHAPE_MULTIPOINT = 8; |
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31 | |||
32 | public static final int SHAPE_POINTZ = 11; |
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33 | |||
34 | public static final int SHAPE_POLYLINEZ = 13; |
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35 | |||
36 | public static final int SHAPE_POLYGONZ = 15; |
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37 | |||
38 | public static final int SHAPE_MULTIPOINTZ = 18; |
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39 | |||
40 | public static final int SHAPE_POINTM = 21; |
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41 | |||
42 | public static final int SHAPE_POLYLINEM = 23; |
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43 | |||
44 | public static final int SHAPE_POLYGONM = 25; |
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45 | |||
46 | public static final int SHAPE_MULTIPOINTM = 28; |
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47 | |||
48 | public static final int SHAPE_MULTIPATCH = 31; |
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49 | |||
50 | private static Logger logger = Logger.getLogger(ShapeFileHeader.class); |
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51 | |||
52 | /** File Code, must be the value 9994 */
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53 | public int myFileCode = 9994; |
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54 | |||
55 | /** Unused 1; */
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56 | public int myUnused1 = 0; |
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57 | |||
58 | /** Unused 2; */
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59 | public int myUnused2 = 0; |
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60 | |||
61 | /** Unused 3; */
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62 | public int myUnused3 = 0; |
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63 | |||
64 | /** Unused 4; */
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65 | public int myUnused4 = 0; |
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66 | |||
67 | /** Unused 5; */
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68 | public int myUnused5 = 0; |
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69 | |||
70 | /** File Length; */
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71 | public int myFileLength = 0; |
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72 | |||
73 | /** Version of the file. */
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74 | public int myVersion = 1000; |
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75 | |||
76 | public int myShapeType = 0; |
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77 | |||
78 | /** BoundingBox Xmin */
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79 | public double myXmin = 0; |
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80 | |||
81 | /** BoundingBox Ymin */
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82 | public double myYmin = 0; |
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83 | |||
84 | /** BoundingBox Xmax */
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85 | public double myXmax = 0; |
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86 | |||
87 | /** BoundingBox Ymax */
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88 | public double myYmax = 0; |
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89 | |||
90 | /** BoundingBox Zmin */
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91 | public double myZmin = 0; |
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92 | |||
93 | /** BoundingBox Zmax */
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94 | public double myZmax = 0; |
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95 | |||
96 | /** BoundingBox Zmin */
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97 | public double myMmin = 0; |
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98 | |||
99 | /** BoundingBox Zmax */
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100 | public double myMmax = 0; |
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101 | |||
102 | // notify about warnings.
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103 | private boolean myWarning = true; |
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104 | |||
105 | /**
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106 | * ShapeFileHeader constructor comment.
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107 | */
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108 | public ShapeFileHeader() {
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109 | super();
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110 | } |
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111 | |||
112 | /**
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113 | * Return the file code.
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114 | *
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115 | * @return Entero.
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116 | */
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117 | public int getFileCode() { |
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118 | return myFileCode;
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119 | } |
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120 | |||
121 | /**
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122 | * Return the version of the file.
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123 | *
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124 | * @return Versi?n.
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125 | */
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126 | public int getVersion() { |
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127 | return myVersion;
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128 | } |
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129 | |||
130 | /**
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131 | * Get the extents of the shape file.
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132 | *
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133 | * @return FullExtent.
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134 | */
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135 | public java.awt.geom.Rectangle2D.Double getFileExtents() {
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136 | return new java.awt.geom.Rectangle2D.Double(myXmin, myYmin, myXmax |
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137 | - myXmin, myYmax - myYmin); |
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138 | } |
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139 | |||
140 | /**
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141 | * Print warnings to system.out.
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142 | *
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143 | * @param inWarning
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144 | * boolean.
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145 | */
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146 | public void setWarnings(boolean inWarning) { |
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147 | myWarning = inWarning; |
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148 | } |
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149 | |||
150 | /**
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151 | * Return the length of the header in 16 bit words..
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152 | *
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153 | * @return Longitud de la cabecera.
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154 | */
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155 | public int getHeaderLength() { |
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156 | return 50; |
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157 | } |
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158 | |||
159 | /**
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160 | * Return the number of 16 bit words in the shape file as recorded in the
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161 | * header
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162 | *
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163 | * @return Longitud del fichero.
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164 | */
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165 | public int getFileLength() { |
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166 | return myFileLength;
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167 | } |
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168 | |||
169 | /**
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170 | * Read the header from the shape file.
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171 | *
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172 | * @param in
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173 | * ByteBuffer.
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174 | */
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175 | public void readHeader(FalseByteBuffer in) { |
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176 | // the first four bytes are integers
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177 | // in.setLittleEndianMode(false);
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178 | in.setByteOrder(ByteOrder.BIG_ENDIAN);
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179 | myFileCode = in.getInt(); |
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180 | |||
181 | if (myFileCode != 9994) { |
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182 | warn("File Code = " + myFileCode + " Not equal to 9994"); |
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183 | } |
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184 | |||
185 | // From 4 to 8 are unused.
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186 | myUnused1 = in.getInt(); |
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187 | |||
188 | // From 8 to 12 are unused.
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189 | myUnused2 = in.getInt(); |
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190 | |||
191 | // From 12 to 16 are unused.
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192 | myUnused3 = in.getInt(); |
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193 | |||
194 | // From 16 to 20 are unused.
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195 | myUnused4 = in.getInt(); |
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196 | |||
197 | // From 20 to 24 are unused.
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198 | myUnused5 = in.getInt(); |
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199 | |||
200 | // From 24 to 28 are the file length.
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201 | myFileLength = in.getInt(); |
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202 | |||
203 | // From 28 to 32 are the File Version.
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204 | in.setByteOrder(ByteOrder.LITTLE_ENDIAN);
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205 | myVersion = in.getInt(); |
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206 | |||
207 | // From 32 to 36 are the Shape Type.
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208 | myShapeType = in.getInt(); |
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209 | |||
210 | // From 36 to 44 are Xmin.
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211 | myXmin = in.getDouble(); // Double.longBitsToDouble(in.getLong());
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212 | |||
213 | // From 44 to 52 are Ymin.
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214 | myYmin = in.getDouble(); |
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215 | |||
216 | // From 52 to 60 are Xmax.
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217 | myXmax = in.getDouble(); |
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218 | |||
219 | // From 60 to 68 are Ymax.
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220 | myYmax = in.getDouble(); |
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221 | |||
222 | // From 68 to 76 are Zmin.
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223 | myZmin = in.getDouble(); |
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224 | |||
225 | // From 76 to 84 are Zmax.
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226 | myZmax = in.getDouble(); |
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227 | |||
228 | // From 84 to 92 are Mmin.
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229 | myMmin = in.getDouble(); |
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230 | |||
231 | // From 92 to 100 are Mmax.
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232 | myMmax = in.getDouble(); |
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233 | |||
234 | // that is all 100 bytes of the header.
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235 | } |
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236 | |||
237 | public void write(IByteBuffer out, int type, int numGeoms, int length, |
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238 | double minX, double minY, double maxX, double maxY, double minZ, |
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239 | double maxZ, double minM, double maxM) throws IOException { |
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240 | out.order(ByteOrder.BIG_ENDIAN);
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241 | |||
242 | out.putInt(myFileCode); |
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243 | |||
244 | for (int i = 0; i < 5; i++) { |
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245 | out.putInt(0); // Skip unused part of header |
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246 | } |
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247 | |||
248 | out.putInt(length); |
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249 | |||
250 | out.order(ByteOrder.LITTLE_ENDIAN);
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251 | |||
252 | out.putInt(myVersion); |
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253 | out.putInt(type); |
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254 | |||
255 | // write the bounding box
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256 | out.putDouble(minX); |
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257 | out.putDouble(minY); |
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258 | out.putDouble(maxX); |
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259 | out.putDouble(maxY); |
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260 | /*
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261 | * out.putDouble(minZ); out.putDouble(minZ); out.putDouble(maxM);
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262 | * out.putDouble(maxM);
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263 | */
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264 | out.order(ByteOrder.BIG_ENDIAN);
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265 | for (int i = 0; i < 8; i++) { |
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266 | out.putInt(0); // Skip unused part of header |
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267 | } |
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268 | |||
269 | } |
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270 | |||
271 | /**
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272 | * Muestra por consola los warning.
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273 | *
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274 | * @param inWarn
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275 | * warning.
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276 | */
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277 | private void warn(String inWarn) { |
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278 | if (myWarning) {
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279 | logger.warn(inWarn); |
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280 | } |
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281 | } |
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282 | } |