Application: gvSIG desktop

/*

 * Created on 14-may-2004

 *

 * @author "Luis W. Sevilla" <sevilla_lui@gva.es>

 */

package org.cresques.io;

/*

 *    GISToolkit - Geographical Information System Toolkit

 *    (C) 2002, Ithaqua Enterprises Inc.

 *

 *    This library is free software; you can redistribute it and/or

 *    modify it under the terms of the GNU Lesser General Public

 *    License as published by the Free Software Foundation;

 *    version 2.1 of the License.

 *

 *    This library is distributed in the hope that it will be useful,

 *    but WITHOUT ANY WARRANTY; without even the implied warranty of

 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *    Lesser General Public License for more details.

 *

 *    You should have received a copy of the GNU Lesser General Public

 *    License along with this library; if not, write to the Free Software

 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

import java.nio.*;

/**

 * Procesa la cabecera de un .shp

 * 

 * @author "Luis W. Sevilla" <sevilla_lui@gva.es>* @author administrador

 */

public class ShpFileHeader {

//}

/**

 * Class to represent the header in the shape file.

 */

//public class ShapeFileHeader {

        /**

         * Shape Type

         * Value Shape Type

         * 0 Null Shape

         * 1 Point

         * 3 PolyLine

         * 5 Polygon

         * 8 MultiPoint

         * 11 PointZ

         * 13 PolyLineZ

         * 15 PolygonZ

         * 18 MultiPointZ

         * 21 PointM

         * 23 PolyLineM

         * 25 PolygonM

         * 28 MultiPointM

         * 31 MultiPatch

         */

        /* The null shape type, there is no shape for this record. */

        public static final int SHAPE_NULL = 0;

        public static final int SHAPE_POINT = 1;

        public static final int SHAPE_POLYLINE = 3;

        public static final int SHAPE_POLYGON = 5;

        public static final int SHAPE_MULTIPOINT = 8;

        public static final int SHAPE_POINTZ = 11;

        public static final int SHAPE_POLYLINEZ = 13;

        public static final int SHAPE_POLYGONZ = 15;

        public static final int SHAPE_MULTIPOINTZ = 18;

        public static final int SHAPE_POINTM = 21;

        public static final int SHAPE_POLYLINEM = 23;

        public static final int SHAPE_POLYGONM = 25;

        public static final int SHAPE_MULTIPOINTM = 28;

        public static final int SHAPE_MULTIPATCH = 31;

        /**File Code, must be the value 9994*/

        int myFileCode = 9994;

        /**

         * Unused 1;

         */

        int myUnused1 = 0;

        /**

         * Unused 2;

         */

        int myUnused2 = 0;

        /**

         * Unused 3;

         */

        int myUnused3 = 0;

        /**

         * Unused 4;

         */

        int myUnused4 = 0;

        /**

         * Unused 5;

         */

        int myUnused5 = 0;

        /**File Length;*/

        int myFileLength = 0;

        /**Version of the file.*/

        int myVersion = 1000;

        int myShapeType = 0;

        /**

         * BoundingBox Xmin

         */

        double myXmin = 0;

        /**

         * BoundingBox Ymin

         */

        double myYmin = 0;

        /**

         * BoundingBox Xmax

         */

        double myXmax = 0;

        /**

         * BoundingBox Ymax

         */

        double myYmax = 0;

        /**

         * BoundingBox Zmin

         */

        double myZmin = 0;

        /**

         * BoundingBox Zmax

         */

        double myZmax = 0;

        /**

         * BoundingBox Zmin

         */

        double myMmin = 0;

        /**

         * BoundingBox Zmax

         */

        double myMmax = 0;

        // notify about warnings.

        private boolean myWarning = true;

        /**

         * ShapeFileHeader constructor comment.

         */

        public ShpFileHeader() {

                super();

        }

        /** Return the file code. */

        public int getFileCode() {

                return myFileCode;

        }

        /** Return the version of the file. */

        public int getVersion() {

                return myVersion;

        }

        /** Get the extents of the shape file. */

        public java.awt.geom.Rectangle2D.Double getFileExtents() {

                return new java.awt.geom.Rectangle2D.Double(myXmin, myYmin,

                        myXmax - myXmin, myYmax - myYmin);

        }

        /** Print warnings to system.out. */

        public void setWarnings(boolean inWarning) {

                myWarning = inWarning;

        }

        /**

         * Return the length of the header in 16 bit words..

         */

        public int getHeaderLength() {

                return 50;

        }

        /**

         * Return the number of 16 bit words in the shape file as recorded in the header

         */

        public int getFileLength() {

                return myFileLength;

        }

        /**

         * Read the header from the shape file.

         */

        public void readHeader(ByteBuffer in) {

                // the first four bytes are integers

                // in.setLittleEndianMode(false);

                in.order(ByteOrder.BIG_ENDIAN);

                myFileCode = in.getInt();

                if (myFileCode != 9994) {

                        warn("File Code = " + myFileCode + " Not equal to 9994");

                }

                // From 4 to 8 are unused.

                myUnused1 = in.getInt();

                // From 8 to 12 are unused.

                myUnused2 = in.getInt();

                // From 12 to 16 are unused.

                myUnused3 = in.getInt();

                // From 16 to 20 are unused.

                myUnused4 = in.getInt();

                // From 20 to 24 are unused.

                myUnused5 = in.getInt();

                // From 24 to 28 are the file length.

                myFileLength = in.getInt();

                // From 28 to 32 are the File Version.

                in.order(ByteOrder.LITTLE_ENDIAN);

                myVersion = in.getInt();

                // From 32 to 36 are the Shape Type.

                myShapeType = in.getInt();

                // From 36 to 44 are Xmin.

                myXmin = in.getDouble(); // Double.longBitsToDouble(in.getLong());

                // From 44 to 52 are Ymin.

                myYmin = in.getDouble();

                // From 52 to 60 are Xmax.

                myXmax = in.getDouble();

                // From 60 to 68 are Ymax.

                myYmax = in.getDouble();

                // From 68 to 76 are Zmin.

                myZmin = in.getDouble();

                // From 76 to 84 are Zmax.

                myZmax = in.getDouble();

                // From 84 to 92 are Mmin.

                myMmin = in.getDouble();

                // From 92 to 100 are Mmax.

                myMmax = in.getDouble();

                // that is all 100 bytes of the header.

        }

        private void warn(String inWarn) {

                if (myWarning) {

                        System.out.print("WARNING: ");

                        System.out.println(inWarn);

                }

        }

}