root / tags / v1_1_Build_1010 / libraries / libCq CMS for java.old / src / org / cresques / io / ShpFileHeader.java @ 12804
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package org.cresques.io; |
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/*
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* GISToolkit - Geographical Information System Toolkit
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* (C) 2002, Ithaqua Enterprises Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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import java.nio.*; |
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/**
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* Procesa la cabecera de un .shp
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>* @author administrador
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*/
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public class ShpFileHeader { |
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//}
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/**
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* Class to represent the header in the shape file.
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*/
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//public class ShapeFileHeader {
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/**
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* Shape Type
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* Value Shape Type
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* 0 Null Shape
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* 1 Point
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* 3 PolyLine
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* 5 Polygon
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* 8 MultiPoint
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* 11 PointZ
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* 13 PolyLineZ
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* 15 PolygonZ
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* 18 MultiPointZ
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* 21 PointM
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* 23 PolyLineM
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* 25 PolygonM
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* 28 MultiPointM
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* 31 MultiPatch
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*/
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/* The null shape type, there is no shape for this record. */
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public static final int SHAPE_NULL = 0; |
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public static final int SHAPE_POINT = 1; |
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public static final int SHAPE_POLYLINE = 3; |
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public static final int SHAPE_POLYGON = 5; |
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public static final int SHAPE_MULTIPOINT = 8; |
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public static final int SHAPE_POINTZ = 11; |
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public static final int SHAPE_POLYLINEZ = 13; |
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public static final int SHAPE_POLYGONZ = 15; |
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public static final int SHAPE_MULTIPOINTZ = 18; |
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public static final int SHAPE_POINTM = 21; |
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public static final int SHAPE_POLYLINEM = 23; |
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public static final int SHAPE_POLYGONM = 25; |
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public static final int SHAPE_MULTIPOINTM = 28; |
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public static final int SHAPE_MULTIPATCH = 31; |
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/**File Code, must be the value 9994*/
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int myFileCode = 9994; |
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/**
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* Unused 1;
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*/
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int myUnused1 = 0; |
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/**
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* Unused 2;
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*/
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int myUnused2 = 0; |
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/**
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* Unused 3;
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*/
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int myUnused3 = 0; |
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/**
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* Unused 4;
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*/
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int myUnused4 = 0; |
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/**
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* Unused 5;
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*/
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int myUnused5 = 0; |
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/**File Length;*/
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int myFileLength = 0; |
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/**Version of the file.*/
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int myVersion = 1000; |
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int myShapeType = 0; |
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/**
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* BoundingBox Xmin
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*/
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double myXmin = 0; |
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/**
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* BoundingBox Ymin
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*/
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double myYmin = 0; |
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/**
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* BoundingBox Xmax
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*/
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double myXmax = 0; |
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/**
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* BoundingBox Ymax
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*/
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double myYmax = 0; |
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/**
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* BoundingBox Zmin
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*/
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double myZmin = 0; |
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/**
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* BoundingBox Zmax
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*/
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double myZmax = 0; |
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/**
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* BoundingBox Zmin
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*/
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double myMmin = 0; |
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/**
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* BoundingBox Zmax
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*/
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double myMmax = 0; |
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// notify about warnings.
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private boolean myWarning = true; |
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/**
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* ShapeFileHeader constructor comment.
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*/
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public ShpFileHeader() {
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super();
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} |
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/** Return the file code. */
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public int getFileCode() { |
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return myFileCode;
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} |
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/** Return the version of the file. */
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public int getVersion() { |
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return myVersion;
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} |
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/** Get the extents of the shape file. */
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public java.awt.geom.Rectangle2D.Double getFileExtents() {
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return new java.awt.geom.Rectangle2D.Double(myXmin, myYmin, |
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myXmax - myXmin, |
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myYmax - myYmin); |
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} |
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/** Print warnings to system.out. */
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public void setWarnings(boolean inWarning) { |
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myWarning = inWarning; |
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} |
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/**
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* Return the length of the header in 16 bit words..
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*/
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public int getHeaderLength() { |
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return 50; |
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} |
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/**
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* Return the number of 16 bit words in the shape file as recorded in the header
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*/
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public int getFileLength() { |
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return myFileLength;
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} |
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/**
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* Read the header from the shape file.
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*/
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public void readHeader(ByteBuffer in) { |
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// the first four bytes are integers
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// in.setLittleEndianMode(false);
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in.order(ByteOrder.BIG_ENDIAN);
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myFileCode = in.getInt(); |
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if (myFileCode != 9994) { |
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warn("File Code = " + myFileCode + " Not equal to 9994"); |
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} |
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// From 4 to 8 are unused.
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myUnused1 = in.getInt(); |
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// From 8 to 12 are unused.
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myUnused2 = in.getInt(); |
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// From 12 to 16 are unused.
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myUnused3 = in.getInt(); |
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// From 16 to 20 are unused.
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myUnused4 = in.getInt(); |
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// From 20 to 24 are unused.
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myUnused5 = in.getInt(); |
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// From 24 to 28 are the file length.
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myFileLength = in.getInt(); |
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// From 28 to 32 are the File Version.
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in.order(ByteOrder.LITTLE_ENDIAN);
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myVersion = in.getInt(); |
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// From 32 to 36 are the Shape Type.
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myShapeType = in.getInt(); |
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// From 36 to 44 are Xmin.
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myXmin = in.getDouble(); // Double.longBitsToDouble(in.getLong());
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// From 44 to 52 are Ymin.
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myYmin = in.getDouble(); |
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// From 52 to 60 are Xmax.
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myXmax = in.getDouble(); |
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// From 60 to 68 are Ymax.
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myYmax = in.getDouble(); |
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// From 68 to 76 are Zmin.
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myZmin = in.getDouble(); |
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// From 76 to 84 are Zmax.
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myZmax = in.getDouble(); |
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// From 84 to 92 are Mmin.
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myMmin = in.getDouble(); |
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// From 92 to 100 are Mmax.
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myMmax = in.getDouble(); |
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// that is all 100 bytes of the header.
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} |
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private void warn(String inWarn) { |
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if (myWarning) {
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System.out.print("WARNING: "); |
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System.out.println(inWarn);
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} |
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} |
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} |