svn-gvsig-desktop / tags / v1_0_2_Build_895 / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / shp / DbaseFileHeaderNIO.java @ 10328
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/*
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* Geotools - OpenSource mapping toolkit
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* (C) 2002, Centre for Computational Geography
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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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* This file is based on an origional contained in the GISToolkit project:
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* http://gistoolkit.sourceforge.net/
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*
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*/
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
|
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
|
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
|
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* along with this program; 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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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.drivers.shp; |
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import java.io.EOFException; |
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import java.io.IOException; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.nio.channels.FileChannel; |
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import java.nio.channels.ReadableByteChannel; |
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import java.sql.Types; |
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import java.util.Calendar; |
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import java.util.Date; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import com.hardcode.gdbms.engine.data.DataSource; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.utiles.bigfile.BigByteBuffer2; |
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import com.vividsolutions.jts.geom.Geometry; |
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/**
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* Class to represent the header of a Dbase III file. Creation date: (5/15/2001
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* 5:15:30 PM)
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*/
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public class DbaseFileHeaderNIO { |
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// Constant for the size of a record
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private static final int FILE_DESCRIPTOR_SIZE = 32; |
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// type of the file, must be 03h
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private static final byte MAGIC = 0x03; |
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private static final int MINIMUM_HEADER = 33; |
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// Date the file was last updated.
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private Date date = new Date(); |
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private int recordCnt = 0; |
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private int fieldCnt = 0; |
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private int myFileType = 0; |
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// set this to a default length of 1, which is enough for one "space"
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// character which signifies an empty record
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private int recordLength = 1; |
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// set this to a flagged value so if no fields are added before the write,
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// we know to adjust the headerLength to MINIMUM_HEADER
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private int headerLength = -1; |
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private int largestFieldSize = 0; |
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private Logger logger = Logger.getLogger("org.geotools.data.shapefile"); |
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// collection of header records.
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// lets start out with a zero-length array, just in case
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private DbaseField[] fields = null; // new DbaseField[0]; |
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/**
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* Lee del buffer.
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*
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* @param buffer .
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* @param channel .
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*
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* @throws IOException .
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* @throws EOFException .
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*/
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private void read(ByteBuffer buffer, ReadableByteChannel channel) |
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throws IOException { |
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while (buffer.remaining() > 0) { |
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if (channel.read(buffer) == -1) { |
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throw new EOFException("Premature end of file"); |
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} |
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} |
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} |
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/**
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* Determine the most appropriate Java Class for representing the data in
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* the field.
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*
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* <PRE>
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*
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* All packages are java.lang unless otherwise specified. C (Character) ->
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* String N (Numeric) -> Integer or Double (depends on field's decimal
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* count) F (Floating) -> Double L (Logical) -> Boolean D (Date) ->
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* java.util.Date Unknown -> String
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*
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* </PRE>
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*
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* @param i
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* The index of the field, from 0 to <CODE>getNumFields() - 1</CODE> .
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*
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* @return A Class which closely represents the dbase field type.
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*/
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public Class getFieldClass(int i) { |
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Class typeClass = null; |
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switch (fields[i].fieldType) {
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case 'C': |
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typeClass = String.class;
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break;
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case 'N': |
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if (fields[i].decimalCount == 0) { |
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typeClass = Integer.class;
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} else {
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typeClass = Double.class;
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} |
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break;
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case 'F': |
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typeClass = Double.class;
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break;
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case 'L': |
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typeClass = Boolean.class;
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break;
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case 'D': |
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typeClass = Date.class;
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break;
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default:
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typeClass = String.class;
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break;
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} |
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return typeClass;
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} |
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/**
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* Add a column to this DbaseFileHeader. The type is one of (C N L or D)
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* character, number, logical(true/false), or date. The Field length is the
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* total length in bytes reserved for this column. The decimal count only
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* applies to numbers(N), and floating point values (F), and refers to the
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* number of characters to reserve after the decimal point. <B>Don't expect
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* miracles from this...</B>
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*
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* <PRE>
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*
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* Field Type MaxLength ---------- --------- C 254 D 8 F 20 N 18
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*
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* </PRE>
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*
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* @param inFieldName
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* The name of the new field, must be less than 10 characters or
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* it gets truncated.
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* @param inFieldType
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* A character representing the dBase field, ( see above ). Case
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* insensitive.
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* @param inFieldLength
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* The length of the field, in bytes ( see above )
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* @param inDecimalCount
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* For numeric fields, the number of decimal places to track.
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*/
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public void addColumn(String inFieldName, char inFieldType, |
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int inFieldLength, int inDecimalCount) { |
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/*
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* if (inFieldLength <=0) { throw new DbaseFileException("field length <=
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* 0"); }
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*/
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if (fields == null) { |
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fields = new DbaseField[0]; |
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} |
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int tempLength = 1; // the length is used for the offset, and there is a |
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// * for deleted as the first byte
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DbaseField[] tempFieldDescriptors = new DbaseField[fields.length + 1]; |
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for (int i = 0; i < fields.length; i++) { |
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fields[i].fieldDataAddress = tempLength; |
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tempLength = tempLength + fields[i].fieldLength; |
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tempFieldDescriptors[i] = fields[i]; |
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} |
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tempFieldDescriptors[fields.length] = new DbaseField();
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tempFieldDescriptors[fields.length].fieldLength = inFieldLength; |
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tempFieldDescriptors[fields.length].decimalCount = inDecimalCount; |
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tempFieldDescriptors[fields.length].fieldDataAddress = tempLength; |
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// set the field name
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String tempFieldName = inFieldName;
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if (tempFieldName == null) { |
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tempFieldName = "NoName";
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} |
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// Fix for GEOT-42, ArcExplorer will not handle field names > 10 chars
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// Sorry folks.
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if (tempFieldName.length() > 10) { |
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tempFieldName = tempFieldName.substring(0, 10); |
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warn("FieldName " + inFieldName
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+ " is longer than 10 characters, truncating to "
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+ tempFieldName); |
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} |
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tempFieldDescriptors[fields.length].fieldName = tempFieldName; |
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// the field type
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if ((inFieldType == 'C') || (inFieldType == 'c')) { |
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tempFieldDescriptors[fields.length].fieldType = 'C';
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if (inFieldLength > 254) { |
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warn("Field Length for "
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+ inFieldName |
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+ " set to "
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+ inFieldLength |
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+ " Which is longer than 254, not consistent with dbase III");
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} |
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} else if ((inFieldType == 'S') || (inFieldType == 's')) { |
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tempFieldDescriptors[fields.length].fieldType = 'C';
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warn("Field type for "
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+ inFieldName |
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+ " set to S which is flat out wrong people!, I am setting this to C, in the hopes you meant character.");
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if (inFieldLength > 254) { |
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warn("Field Length for "
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+ inFieldName |
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+ " set to "
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+ inFieldLength |
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+ " Which is longer than 254, not consistent with dbase III");
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} |
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tempFieldDescriptors[fields.length].fieldLength = 8;
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} else if ((inFieldType == 'D') || (inFieldType == 'd')) { |
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tempFieldDescriptors[fields.length].fieldType = 'D';
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if (inFieldLength != 8) { |
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warn("Field Length for " + inFieldName + " set to " |
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+ inFieldLength + " Setting to 8 digets YYYYMMDD");
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} |
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tempFieldDescriptors[fields.length].fieldLength = 8;
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} else if ((inFieldType == 'F') || (inFieldType == 'f')) { |
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tempFieldDescriptors[fields.length].fieldType = 'F';
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if (inFieldLength > 20) { |
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warn("Field Length for "
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+ inFieldName |
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+ " set to "
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+ inFieldLength |
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+ " Preserving length, but should be set to Max of 20 not valid for dbase IV, and UP specification, not present in dbaseIII.");
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} |
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} else if ((inFieldType == 'N') || (inFieldType == 'n')) { |
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tempFieldDescriptors[fields.length].fieldType = 'N';
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if (inFieldLength > 18) { |
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warn("Field Length for "
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+ inFieldName |
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+ " set to "
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+ inFieldLength |
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+ " Preserving length, but should be set to Max of 18 for dbase III specification.");
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} |
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if (inDecimalCount < 0) { |
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warn("Field Decimal Position for " + inFieldName + " set to " |
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+ inDecimalCount |
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+ " Setting to 0 no decimal data will be saved.");
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tempFieldDescriptors[fields.length].decimalCount = 0;
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} |
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if (inDecimalCount > (inFieldLength - 1)) { |
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warn("Field Decimal Position for " + inFieldName + " set to " |
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+ inDecimalCount + " Setting to " + (inFieldLength - 1) |
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+ " no non decimal data will be saved.");
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tempFieldDescriptors[fields.length].decimalCount = inFieldLength - 1;
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} |
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} else if ((inFieldType == 'L') || (inFieldType == 'l')) { |
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tempFieldDescriptors[fields.length].fieldType = 'L';
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if (inFieldLength != 1) { |
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warn("Field Length for " + inFieldName + " set to " |
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+ inFieldLength |
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+ " Setting to length of 1 for logical fields.");
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} |
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tempFieldDescriptors[fields.length].fieldLength = 1;
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} else {
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// throw new DbaseFileException("Undefined field type "+inFieldType
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// + " For column "+inFieldName);
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} |
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// the length of a record
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tempLength = tempLength |
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+ tempFieldDescriptors[fields.length].fieldLength; |
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// set the new fields.
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fields = tempFieldDescriptors; |
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fieldCnt = fields.length; |
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headerLength = MINIMUM_HEADER + (32 * fields.length);
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recordLength = tempLength; |
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} |
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/**
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* Remove a column from this DbaseFileHeader.
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*
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* @param inFieldName
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* The name of the field, will ignore case and trim.
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*
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* @return index of the removed column, -1 if no found
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*
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* @todo This is really ugly, don't know who wrote it, but it needs fixin...
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*/
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public int removeColumn(String inFieldName) { |
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int retCol = -1; |
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int tempLength = 1; |
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DbaseField[] tempFieldDescriptors = new DbaseField[fields.length - 1]; |
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for (int i = 0, j = 0; i < fields.length; i++) { |
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if (!inFieldName.equalsIgnoreCase(fields[i].fieldName.trim())) {
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// if this is the last field and we still haven't found the
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// named field
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if ((i == j) && (i == (fields.length - 1))) { |
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System.err.println("Could not find a field named '" |
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+ inFieldName + "' for removal");
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return retCol;
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} |
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tempFieldDescriptors[j] = fields[i]; |
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tempFieldDescriptors[j].fieldDataAddress = tempLength; |
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tempLength += tempFieldDescriptors[j].fieldLength; |
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// only increment j on non-matching fields
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j++; |
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} else {
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retCol = i; |
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} |
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} |
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// set the new fields.
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fields = tempFieldDescriptors; |
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headerLength = 33 + (32 * fields.length); |
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recordLength = tempLength; |
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return retCol;
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} |
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/**
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* DOCUMENT ME!
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*
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* @param inWarn
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* DOCUMENT ME!
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*
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* @todo addProgessListener handling
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*/
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private void warn(String inWarn) { |
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if (logger.isLoggable(Level.WARNING)) { |
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logger.warning(inWarn); |
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} |
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} |
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|
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// Retrieve the length of the field at the given index
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/**
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* Returns the field length in bytes.
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*
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* @param inIndex
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* The field index.
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*
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* @return The length in bytes.
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*/
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public int getFieldLength(int inIndex) { |
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return fields[inIndex].fieldLength;
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} |
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|
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// Retrieve the location of the decimal point within the field.
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/**
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* Get the decimal count of this field.
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*
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* @param inIndex
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* The field index.
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*
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* @return The decimal count.
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*/
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public int getFieldDecimalCount(int inIndex) { |
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return fields[inIndex].decimalCount;
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} |
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|
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// Retrieve the Name of the field at the given index
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/**
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* Get the field name.
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*
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* @param inIndex
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* The field index.
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*
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* @return The name of the field.
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*/
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public String getFieldName(int inIndex) { |
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return fields[inIndex].fieldName;
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} |
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|
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// Retrieve the type of field at the given index
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/**
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* Get the character class of the field.
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*
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* @param inIndex
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* The field index.
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*
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* @return The dbase character representing this field.
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*/
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public char getFieldType(int inIndex) { |
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return fields[inIndex].fieldType;
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} |
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|
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/**
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* Get the date this file was last updated.
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*
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* @return The Date last modified.
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*/
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public Date getLastUpdateDate() { |
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return date;
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} |
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|
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/**
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* Return the number of fields in the records.
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*
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* @return The number of fields in this table.
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*/
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public int getNumFields() { |
| 493 |
if (fields == null) |
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return 0; |
| 495 |
return fields.length;
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} |
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|
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/**
|
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* Return the number of records in the file
|
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*
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* @return The number of records in this table.
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*/
|
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public int getNumRecords() { |
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return recordCnt;
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} |
| 506 |
|
| 507 |
/**
|
| 508 |
* Get the length of the records in bytes.
|
| 509 |
*
|
| 510 |
* @return The number of bytes per record.
|
| 511 |
*/
|
| 512 |
public int getRecordLength() { |
| 513 |
return recordLength;
|
| 514 |
} |
| 515 |
|
| 516 |
/**
|
| 517 |
* Get the length of the header
|
| 518 |
*
|
| 519 |
* @return The length of the header in bytes.
|
| 520 |
*/
|
| 521 |
public int getHeaderLength() { |
| 522 |
return headerLength;
|
| 523 |
} |
| 524 |
|
| 525 |
/**
|
| 526 |
* Read the header data from the DBF file.
|
| 527 |
*
|
| 528 |
* @param in
|
| 529 |
* DOCUMENT ME!
|
| 530 |
*
|
| 531 |
* @throws IOException
|
| 532 |
* DOCUMENT ME!
|
| 533 |
*/
|
| 534 |
public void readHeader(BigByteBuffer2 in) throws IOException { |
| 535 |
// type of file.
|
| 536 |
myFileType = in.get(); |
| 537 |
|
| 538 |
if (myFileType != 0x03) { |
| 539 |
throw new IOException("Unsupported DBF file Type " |
| 540 |
+ Integer.toHexString(myFileType));
|
| 541 |
} |
| 542 |
|
| 543 |
// parse the update date information.
|
| 544 |
int tempUpdateYear = (int) in.get(); |
| 545 |
int tempUpdateMonth = (int) in.get(); |
| 546 |
int tempUpdateDay = (int) in.get(); |
| 547 |
tempUpdateYear = tempUpdateYear + 1900;
|
| 548 |
|
| 549 |
Calendar c = Calendar.getInstance(); |
| 550 |
c.set(Calendar.YEAR, tempUpdateYear);
|
| 551 |
c.set(Calendar.MONTH, tempUpdateMonth - 1); |
| 552 |
c.set(Calendar.DATE, tempUpdateDay);
|
| 553 |
date = c.getTime(); |
| 554 |
|
| 555 |
// read the number of records.
|
| 556 |
in.order(ByteOrder.LITTLE_ENDIAN);
|
| 557 |
recordCnt = in.getInt(); |
| 558 |
|
| 559 |
// read the length of the header structure.
|
| 560 |
headerLength = in.getShort(); |
| 561 |
|
| 562 |
// read the length of a record
|
| 563 |
recordLength = in.getShort(); |
| 564 |
|
| 565 |
in.order(ByteOrder.BIG_ENDIAN);
|
| 566 |
|
| 567 |
// skip the reserved bytes in the header.
|
| 568 |
in.position(in.position() + 20);
|
| 569 |
|
| 570 |
// calculate the number of Fields in the header
|
| 571 |
fieldCnt = (headerLength - FILE_DESCRIPTOR_SIZE - 1)
|
| 572 |
/ FILE_DESCRIPTOR_SIZE; |
| 573 |
|
| 574 |
// read all of the header records
|
| 575 |
fields = new DbaseField[fieldCnt];
|
| 576 |
|
| 577 |
for (int i = 0; i < fieldCnt; i++) { |
| 578 |
fields[i] = new DbaseField();
|
| 579 |
|
| 580 |
// read the field name
|
| 581 |
byte[] buffer = new byte[11]; |
| 582 |
in.get(buffer); |
| 583 |
fields[i].fieldName = new String(buffer); |
| 584 |
|
| 585 |
// read the field type
|
| 586 |
fields[i].fieldType = (char) in.get();
|
| 587 |
|
| 588 |
// read the field data address, offset from the start of the record.
|
| 589 |
fields[i].fieldDataAddress = in.getInt(); |
| 590 |
|
| 591 |
// read the field length in bytes
|
| 592 |
int tempLength = (int) in.get(); |
| 593 |
|
| 594 |
if (tempLength < 0) { |
| 595 |
tempLength = tempLength + 256;
|
| 596 |
} |
| 597 |
|
| 598 |
fields[i].fieldLength = tempLength; |
| 599 |
|
| 600 |
// read the field decimal count in bytes
|
| 601 |
fields[i].decimalCount = (int) in.get();
|
| 602 |
|
| 603 |
// read the reserved bytes.
|
| 604 |
in.position(in.position() + 14);
|
| 605 |
} |
| 606 |
|
| 607 |
// Last byte is a marker for the end of the field definitions.
|
| 608 |
in.get(); |
| 609 |
} |
| 610 |
|
| 611 |
/**
|
| 612 |
* Get the largest field size of this table.
|
| 613 |
*
|
| 614 |
* @return The largt field size iiin bytes.
|
| 615 |
*/
|
| 616 |
public int getLargestFieldSize() { |
| 617 |
return largestFieldSize;
|
| 618 |
} |
| 619 |
|
| 620 |
/**
|
| 621 |
* Set the number of records in the file
|
| 622 |
*
|
| 623 |
* @param inNumRecords
|
| 624 |
* The number of records.
|
| 625 |
*/
|
| 626 |
public void setNumRecords(int inNumRecords) { |
| 627 |
recordCnt = inNumRecords; |
| 628 |
} |
| 629 |
|
| 630 |
/**
|
| 631 |
* Write the header data to the DBF file.
|
| 632 |
*
|
| 633 |
* @param out
|
| 634 |
* A channel to write to. If you have an OutputStream you can
|
| 635 |
* obtain the correct channel by using
|
| 636 |
* java.nio.Channels.newChannel(OutputStream out).
|
| 637 |
*
|
| 638 |
* @throws IOException
|
| 639 |
* If errors occur.
|
| 640 |
*/
|
| 641 |
public void writeHeader(FileChannel out) throws IOException { |
| 642 |
// take care of the annoying case where no records have been added...
|
| 643 |
if (headerLength == -1) { |
| 644 |
headerLength = MINIMUM_HEADER; |
| 645 |
} |
| 646 |
|
| 647 |
// Desde el principio
|
| 648 |
out.position(0);
|
| 649 |
|
| 650 |
ByteBuffer buffer = ByteBuffer.allocateDirect(headerLength); |
| 651 |
buffer.order(ByteOrder.LITTLE_ENDIAN);
|
| 652 |
|
| 653 |
// write the output file type.
|
| 654 |
buffer.put((byte) MAGIC);
|
| 655 |
|
| 656 |
// write the date stuff
|
| 657 |
Calendar c = Calendar.getInstance(); |
| 658 |
c.setTime(new Date()); |
| 659 |
buffer.put((byte) (c.get(Calendar.YEAR) % 100)); |
| 660 |
buffer.put((byte) (c.get(Calendar.MONTH) + 1)); |
| 661 |
buffer.put((byte) (c.get(Calendar.DAY_OF_MONTH))); |
| 662 |
|
| 663 |
// write the number of records in the datafile.
|
| 664 |
buffer.putInt(recordCnt); |
| 665 |
|
| 666 |
// write the length of the header structure.
|
| 667 |
buffer.putShort((short) headerLength);
|
| 668 |
|
| 669 |
// write the length of a record
|
| 670 |
buffer.putShort((short) recordLength);
|
| 671 |
|
| 672 |
// // write the reserved bytes in the header
|
| 673 |
// for (int i=0; i<20; i++) out.writeByteLE(0);
|
| 674 |
buffer.position(buffer.position() + 20);
|
| 675 |
|
| 676 |
// write all of the header records
|
| 677 |
int tempOffset = 0; |
| 678 |
|
| 679 |
if (fields != null) { |
| 680 |
for (int i = 0; i < fields.length; i++) { |
| 681 |
// write the field name
|
| 682 |
for (int j = 0; j < 11; j++) { |
| 683 |
if (fields[i].fieldName.length() > j) {
|
| 684 |
buffer.put((byte) fields[i].fieldName.charAt(j));
|
| 685 |
} else {
|
| 686 |
buffer.put((byte) 0); |
| 687 |
} |
| 688 |
} |
| 689 |
|
| 690 |
// write the field type
|
| 691 |
buffer.put((byte) fields[i].fieldType);
|
| 692 |
|
| 693 |
// // write the field data address, offset from the start of the
|
| 694 |
// record.
|
| 695 |
buffer.putInt(tempOffset); |
| 696 |
tempOffset += fields[i].fieldLength; |
| 697 |
|
| 698 |
// write the length of the field.
|
| 699 |
buffer.put((byte) fields[i].fieldLength);
|
| 700 |
|
| 701 |
// write the decimal count.
|
| 702 |
buffer.put((byte) fields[i].decimalCount);
|
| 703 |
|
| 704 |
// write the reserved bytes.
|
| 705 |
// for (in j=0; jj<14; j++) out.writeByteLE(0);
|
| 706 |
buffer.position(buffer.position() + 14);
|
| 707 |
} |
| 708 |
} |
| 709 |
// write the end of the field definitions marker
|
| 710 |
buffer.put((byte) 0x0D); |
| 711 |
|
| 712 |
buffer.position(0);
|
| 713 |
|
| 714 |
int r = buffer.remaining();
|
| 715 |
|
| 716 |
while ((r -= out.write(buffer)) > 0) { |
| 717 |
; // do nothing
|
| 718 |
} |
| 719 |
} |
| 720 |
|
| 721 |
/**
|
| 722 |
* Get a simple representation of this header.
|
| 723 |
*
|
| 724 |
* @return A String representing the state of the header.
|
| 725 |
*/
|
| 726 |
public String toString() { |
| 727 |
StringBuffer fs = new StringBuffer(); |
| 728 |
|
| 729 |
for (int i = 0, ii = fields.length; i < ii; i++) { |
| 730 |
DbaseField f = fields[i]; |
| 731 |
fs.append(f.fieldName + " " + f.fieldType + " " + f.fieldLength |
| 732 |
+ " " + f.decimalCount + " " + f.fieldDataAddress + "\n"); |
| 733 |
} |
| 734 |
|
| 735 |
return "DB3 Header\n" + "Date : " + date + "\n" + "Records : " |
| 736 |
+ recordCnt + "\n" + "Fields : " + fieldCnt + "\n" + fs; |
| 737 |
} |
| 738 |
|
| 739 |
/**
|
| 740 |
* Crea un DbaseFile.
|
| 741 |
*
|
| 742 |
* @return DbaseFileHeaderNIO
|
| 743 |
*
|
| 744 |
* @throws IOException .
|
| 745 |
*/
|
| 746 |
public static DbaseFileHeaderNIO createNewDbaseHeader() throws IOException { |
| 747 |
DbaseFileHeaderNIO header = new DbaseFileHeaderNIO();
|
| 748 |
|
| 749 |
for (int i = 0, ii = 1; i < ii; i++) { |
| 750 |
// AttributeType type = featureType.getAttributeType(i);
|
| 751 |
Class colType = Integer.class; |
| 752 |
String colName = "ID"; |
| 753 |
int fieldLen = 10; |
| 754 |
|
| 755 |
if (fieldLen <= 0) { |
| 756 |
fieldLen = 255;
|
| 757 |
} |
| 758 |
|
| 759 |
// @todo respect field length
|
| 760 |
if ((colType == Integer.class) || (colType == Short.class) |
| 761 |
|| (colType == Byte.class)) {
|
| 762 |
header.addColumn(colName, 'N', Math.min(fieldLen, 10), 0); |
| 763 |
} else if (colType == Long.class) { |
| 764 |
header.addColumn(colName, 'N', Math.min(fieldLen, 19), 0); |
| 765 |
} else if ((colType == Double.class) || (colType == Float.class) |
| 766 |
|| (colType == Number.class)) {
|
| 767 |
int l = Math.min(fieldLen, 33); |
| 768 |
int d = Math.max(l - 2, 0); |
| 769 |
header.addColumn(colName, 'N', l, d);
|
| 770 |
} else if (java.util.Date.class.isAssignableFrom(colType)) { |
| 771 |
header.addColumn(colName, 'D', fieldLen, 0); |
| 772 |
} else if (colType == Boolean.class) { |
| 773 |
header.addColumn(colName, 'L', 1, 0); |
| 774 |
} else if (CharSequence.class.isAssignableFrom(colType)) { |
| 775 |
// Possible fix for GEOT-42 : ArcExplorer doesn't like 0 length
|
| 776 |
// ensure that maxLength is at least 1
|
| 777 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), 0); |
| 778 |
} else if (Geometry.class.isAssignableFrom(colType)) { |
| 779 |
continue;
|
| 780 |
} else {
|
| 781 |
throw new IOException("Unable to write : " + colType.getName()); |
| 782 |
} |
| 783 |
} |
| 784 |
|
| 785 |
return header;
|
| 786 |
} |
| 787 |
|
| 788 |
public static DbaseFileHeaderNIO createDbaseHeader(DataSource ds) |
| 789 |
throws IOException { |
| 790 |
try {
|
| 791 |
int[] fieldTypes = new int[ds.getFieldCount()]; |
| 792 |
int[] fieldLength = new int[fieldTypes.length]; |
| 793 |
for (int i = 0; i < fieldTypes.length; i++) { |
| 794 |
fieldTypes[i] = ds.getFieldType(i); |
| 795 |
fieldLength[i] = ds.getFieldWidth(i); |
| 796 |
} |
| 797 |
|
| 798 |
return createDbaseHeader(ds.getFieldNames(), fieldTypes,
|
| 799 |
fieldLength); |
| 800 |
} catch (DriverException e) {
|
| 801 |
// TODO Auto-generated catch block
|
| 802 |
e.printStackTrace(); |
| 803 |
return null; |
| 804 |
} |
| 805 |
} |
| 806 |
|
| 807 |
/**
|
| 808 |
* DOCUMENT ME!
|
| 809 |
*
|
| 810 |
* @param sds
|
| 811 |
* DOCUMENT ME!
|
| 812 |
*
|
| 813 |
* @return DOCUMENT ME!
|
| 814 |
*
|
| 815 |
* @throws IOException
|
| 816 |
* DOCUMENT ME!
|
| 817 |
*/
|
| 818 |
public static DbaseFileHeaderNIO createDbaseHeader(String[] fieldNames, |
| 819 |
int[] fieldTypes, int[] fieldLength) throws IOException { |
| 820 |
DbaseFileHeaderNIO header = new DbaseFileHeaderNIO();
|
| 821 |
|
| 822 |
for (int i = 0, ii = fieldNames.length; i < ii; i++) { |
| 823 |
|
| 824 |
int type = fieldTypes[i];
|
| 825 |
String colName = fieldNames[i];
|
| 826 |
|
| 827 |
// /int fieldLen = ((DBFDriver)sds.getDriver()).getFieldLength(i);
|
| 828 |
int fieldLen = fieldLength[i]; // TODO aqu? el tama?o no es |
| 829 |
// correcto hay que calcularlo,
|
| 830 |
// ahora mismo est? puesto a pi??n.
|
| 831 |
int decimales = 5; |
| 832 |
|
| 833 |
// if (fieldLen <= 0) {
|
| 834 |
// fieldLen = 255;
|
| 835 |
// }
|
| 836 |
// TODO [AZABALA] HE INTENTADO CREAR UN TIPO Types.BIGINT y
|
| 837 |
// ha petado (por eso lo a?ado)
|
| 838 |
if ((type == Types.DOUBLE) || (type == Types.FLOAT) |
| 839 |
|| (type == Types.INTEGER) || (type == Types.BIGINT)) |
| 840 |
|
| 841 |
header.addColumn(colName, 'N', Math.min(fieldLen, 18), |
| 842 |
decimales); |
| 843 |
if (type == Types.DATE) |
| 844 |
header.addColumn(colName, 'D', fieldLen, 0); |
| 845 |
if ((type == Types.BIT) || (type == Types.BOOLEAN)) |
| 846 |
header.addColumn(colName, 'L', 1, 0); |
| 847 |
if ((type == Types.VARCHAR) || (type == Types.CHAR) |
| 848 |
|| (type == Types.LONGVARCHAR))
|
| 849 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), 0); |
| 850 |
} |
| 851 |
|
| 852 |
return header;
|
| 853 |
} |
| 854 |
|
| 855 |
/**
|
| 856 |
* Class for holding the information assicated with a record.
|
| 857 |
*/
|
| 858 |
class DbaseField { |
| 859 |
// Field Name
|
| 860 |
String fieldName;
|
| 861 |
|
| 862 |
// Field Type (C N L D or M)
|
| 863 |
char fieldType;
|
| 864 |
|
| 865 |
// Field Data Address offset from the start of the record.
|
| 866 |
int fieldDataAddress;
|
| 867 |
|
| 868 |
// Length of the data in bytes
|
| 869 |
int fieldLength;
|
| 870 |
|
| 871 |
// Field decimal count in Binary, indicating where the decimal is
|
| 872 |
int decimalCount;
|
| 873 |
} |
| 874 |
|
| 875 |
public static DbaseFileHeaderNIO createDbaseHeader( |
| 876 |
FieldDescription[] fieldsDesc) {
|
| 877 |
DbaseFileHeaderNIO header = new DbaseFileHeaderNIO();
|
| 878 |
|
| 879 |
for (int i = 0, ii = fieldsDesc.length; i < ii; i++) { |
| 880 |
|
| 881 |
int type = fieldsDesc[i].getFieldType();
|
| 882 |
String colName = fieldsDesc[i].getFieldName();
|
| 883 |
|
| 884 |
int fieldLen = fieldsDesc[i].getFieldLength(); // TODO aqu? el |
| 885 |
// tama?o no es
|
| 886 |
// correcto hay que
|
| 887 |
// calcularlo, ahora
|
| 888 |
// mismo est? puesto
|
| 889 |
// a pi??n.
|
| 890 |
int decimales = fieldsDesc[i].getFieldDecimalCount();
|
| 891 |
|
| 892 |
switch (type) {
|
| 893 |
case Types.DOUBLE: |
| 894 |
case Types.FLOAT: |
| 895 |
case Types.INTEGER: |
| 896 |
case Types.BIGINT: |
| 897 |
case Types.SMALLINT: |
| 898 |
header.addColumn(colName, 'N', Math.min(fieldLen, 18), |
| 899 |
decimales); |
| 900 |
break;
|
| 901 |
case Types.DATE: |
| 902 |
header.addColumn(colName, 'D', fieldLen, 0); |
| 903 |
break;
|
| 904 |
case Types.BIT: |
| 905 |
case Types.BOOLEAN: |
| 906 |
header.addColumn(colName, 'L', 1, 0); |
| 907 |
break;
|
| 908 |
case Types.VARCHAR: |
| 909 |
case Types.CHAR: |
| 910 |
case Types.LONGVARCHAR: |
| 911 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), 0); |
| 912 |
break;
|
| 913 |
default:
|
| 914 |
throw new RuntimeException("Field type " + type + " not supported in DBF writer"); |
| 915 |
|
| 916 |
} |
| 917 |
} // for
|
| 918 |
|
| 919 |
return header;
|
| 920 |
|
| 921 |
} |
| 922 |
|
| 923 |
public void setFieldName(int j, String newName) { |
| 924 |
fields[j].fieldName = newName; |
| 925 |
} |
| 926 |
} |