/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
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; either
version 2.1 of the License, or (at your option) any later version.
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
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.io.dbaseapi;
import org.deegree.model.spatialschema.ByteUtils;
/**
* Class representing the header of a dBase III/IV file
*
* @version 03.05.2000
* @author Andreas Poth
*/
public class DBFHeader {
private byte[] header = null;
/**
* constructor
* retrieves number of fields
*/
public DBFHeader(FieldDescriptor[] fieldDesc) throws DBaseException {
try {
// allocate memory for the header
header = new byte[32 + fieldDesc.length * 32 + 1];
// set file type
header[0] = 3;
// set date YYMMDD
header[1] = 0;
header[2] = 1;
header[3] = 1;
//number of records in the dBase file
ByteUtils.writeLEInt(header,4,0);
// write number of bytes in the header
ByteUtils.writeLEShort(header,8,header.length);
// set field descriptors and calculate length of the data section
int sum = 0;
for (int i = 0; i < fieldDesc.length; i++) {
setField( i, fieldDesc[i] );
byte[] data = fieldDesc[i].getFieldDescriptor();
sum += data[16];
data = null;
}
sum++;
// write number of bytes in the record (data section)
ByteUtils.writeLEShort(header,10,sum);
// set field terminator
header[header.length-1] = 0x0D;
} catch (Exception e) {
e.printStackTrace();
throw new DBaseException( e.getMessage() );
}
}
/**
* method: public void setField(int index, FieldDescriptor fd)
* puts a field on the header byte array
*/
private void setField(int index, FieldDescriptor fd) {
// get field descriptor data
byte[] fddata = fd.getFieldDescriptor();
// put field descriptor data on header byte array
for (int i = 0; i < 32; i++) {
header[32 + (index * 32) + i] = fddata[i];
}
}
/**
* method: public byte[] getHeader() throws DBaseException
* returns the header as a byte array
*
*/
public byte[] getHeader() {
return header;
}
}
/*
* Last changes:
* $Log: DBFHeader.java,v $
* Revision 1.10 2006/08/06 20:55:27 poth
* never thrown exception removed
*
* Revision 1.9 2006/07/12 14:46:16 poth
* comment footer added
*
* Revision 1.8 2006/04/06 20:25:30 poth
* *** empty log message ***
*
* Revision 1.7 2006/04/04 20:39:44 poth
* *** empty log message ***
*
* Revision 1.6 2006/03/30 21:20:28 poth
* *** empty log message ***
*
* Revision 1.5 2005/12/18 19:06:30 poth
* no message
*
* Revision 1.4 2005/07/08 13:24:53 poth
* no message
*
* Revision 1.3 2005/02/13 21:34:58 friebe
* fix javadoc errors
*
* 28.04.00 ap: constructor declared and implemented<BR>
* 28.04.00 ap: method setField(int index, FieldDescriptor fd)<BR>
* 28.04.00 ap: method getHeader() declared and implemented<BR>
* 03.05.00 ap: constructor modified<BR>
*/
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: DBFHeader.java,v $
Revision 1.10 2006/08/06 20:55:27 poth
never thrown exception removed
Revision 1.9 2006/07/12 14:46:16 poth
comment footer added
********************************************************************** */