root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / shp / DbaseFileHeaderNIO.java @ 1160
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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 com.hardcode.gdbms.engine.data.DriverException; |
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import com.hardcode.gdbms.engine.instruction.SemanticException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.iver.cit.gvsig.fmap.layers.SelectableDataSource; |
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import com.vividsolutions.jts.geom.Geometry; |
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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.ReadableByteChannel; |
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import java.nio.channels.WritableByteChannel; |
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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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/**
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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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* <PRE>
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* All packages are java.lang unless otherwise specified.
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* C (Character) -> String
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* N (Numeric) -> Integer or Double (depends on field's decimal count)
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* F (Floating) -> Double
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* L (Logical) -> Boolean
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* D (Date) -> java.util.Date
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* Unknown -> String
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* </PRE>
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*
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* @param i The index of the field, from 0 to <CODE>getNumFields() -
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* 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
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* the total length in bytes reserved for this column. The decimal count
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* only applies to numbers(N), and floating point values (F), and refers
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* to the number of characters to reserve after the decimal point.
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* <B>Don't expect miracles from this...</B>
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* <PRE>
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* Field Type MaxLength
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* ---------- ---------
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* C 254
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* D 8
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* F 20
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* N 18
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* </PRE>
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*
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* @param inFieldName The name of the new field, must be less than 10
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* characters or it gets truncated.
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* @param inFieldType A character representing the dBase field, ( see above
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* ). Case insensitive.
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* @param inFieldLength The length of the field, in bytes ( see above )
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* @param inDecimalCount For numeric fields, the number of decimal places
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* 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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/*if (inFieldLength <=0) {
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throw new DbaseFileException("field length <= 0");
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}
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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 * 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 " + inFieldName + " 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 " + 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 " + inFieldName + " 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 " + inFieldName + " 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 " + inFieldName + " 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 - |
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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 + " 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 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
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* 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 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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// 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 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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// 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 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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// 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 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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// 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 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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* 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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* 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() { |
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return fields.length;
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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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} |
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/**
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* Get the length of the records in bytes.
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*
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* @return The number of bytes per record.
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*/
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public int getRecordLength() { |
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return recordLength;
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} |
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|
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/**
|
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* Get the length of the header
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*
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* @return The length of the header in bytes.
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*/
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public int getHeaderLength() { |
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return headerLength;
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} |
| 504 |
|
| 505 |
/**
|
| 506 |
* Read the header data from the DBF file.
|
| 507 |
*
|
| 508 |
* @param in DOCUMENT ME!
|
| 509 |
*
|
| 510 |
* @throws IOException DOCUMENT ME!
|
| 511 |
*/
|
| 512 |
public void readHeader(ByteBuffer in) throws IOException { |
| 513 |
// type of file.
|
| 514 |
myFileType = in.get(); |
| 515 |
|
| 516 |
if (myFileType != 0x03) { |
| 517 |
throw new IOException("Unsupported DBF file Type " + |
| 518 |
Integer.toHexString(myFileType));
|
| 519 |
} |
| 520 |
|
| 521 |
// parse the update date information.
|
| 522 |
int tempUpdateYear = (int) in.get(); |
| 523 |
int tempUpdateMonth = (int) in.get(); |
| 524 |
int tempUpdateDay = (int) in.get(); |
| 525 |
tempUpdateYear = tempUpdateYear + 1900;
|
| 526 |
|
| 527 |
Calendar c = Calendar.getInstance(); |
| 528 |
c.set(Calendar.YEAR, tempUpdateYear);
|
| 529 |
c.set(Calendar.MONTH, tempUpdateMonth - 1); |
| 530 |
c.set(Calendar.DATE, tempUpdateDay);
|
| 531 |
date = c.getTime(); |
| 532 |
|
| 533 |
// read the number of records.
|
| 534 |
in.order(ByteOrder.LITTLE_ENDIAN);
|
| 535 |
recordCnt = in.getInt(); |
| 536 |
|
| 537 |
// read the length of the header structure.
|
| 538 |
headerLength = in.getShort(); |
| 539 |
|
| 540 |
// read the length of a record
|
| 541 |
recordLength = in.getShort(); |
| 542 |
|
| 543 |
in.order(ByteOrder.BIG_ENDIAN);
|
| 544 |
|
| 545 |
// skip the reserved bytes in the header.
|
| 546 |
in.position(in.position() + 20);
|
| 547 |
|
| 548 |
// calculate the number of Fields in the header
|
| 549 |
fieldCnt = (headerLength - FILE_DESCRIPTOR_SIZE - 1) / FILE_DESCRIPTOR_SIZE;
|
| 550 |
|
| 551 |
// read all of the header records
|
| 552 |
fields = new DbaseField[fieldCnt];
|
| 553 |
|
| 554 |
for (int i = 0; i < fieldCnt; i++) { |
| 555 |
fields[i] = new DbaseField();
|
| 556 |
|
| 557 |
// read the field name
|
| 558 |
byte[] buffer = new byte[11]; |
| 559 |
in.get(buffer); |
| 560 |
fields[i].fieldName = new String(buffer); |
| 561 |
|
| 562 |
// read the field type
|
| 563 |
fields[i].fieldType = (char) in.get();
|
| 564 |
|
| 565 |
// read the field data address, offset from the start of the record.
|
| 566 |
fields[i].fieldDataAddress = in.getInt(); |
| 567 |
|
| 568 |
// read the field length in bytes
|
| 569 |
int tempLength = (int) in.get(); |
| 570 |
|
| 571 |
if (tempLength < 0) { |
| 572 |
tempLength = tempLength + 256;
|
| 573 |
} |
| 574 |
|
| 575 |
fields[i].fieldLength = tempLength; |
| 576 |
|
| 577 |
// read the field decimal count in bytes
|
| 578 |
fields[i].decimalCount = (int) in.get();
|
| 579 |
|
| 580 |
// read the reserved bytes.
|
| 581 |
in.position(in.position() + 14);
|
| 582 |
} |
| 583 |
|
| 584 |
// Last byte is a marker for the end of the field definitions.
|
| 585 |
in.get(); |
| 586 |
} |
| 587 |
|
| 588 |
/**
|
| 589 |
* Get the largest field size of this table.
|
| 590 |
*
|
| 591 |
* @return The largt field size iiin bytes.
|
| 592 |
*/
|
| 593 |
public int getLargestFieldSize() { |
| 594 |
return largestFieldSize;
|
| 595 |
} |
| 596 |
|
| 597 |
/**
|
| 598 |
* Set the number of records in the file
|
| 599 |
*
|
| 600 |
* @param inNumRecords The number of records.
|
| 601 |
*/
|
| 602 |
public void setNumRecords(int inNumRecords) { |
| 603 |
recordCnt = inNumRecords; |
| 604 |
} |
| 605 |
|
| 606 |
/**
|
| 607 |
* Write the header data to the DBF file.
|
| 608 |
*
|
| 609 |
* @param out A channel to write to. If you have an OutputStream you can
|
| 610 |
* obtain the correct channel by using
|
| 611 |
* java.nio.Channels.newChannel(OutputStream out).
|
| 612 |
*
|
| 613 |
* @throws IOException If errors occur.
|
| 614 |
*/
|
| 615 |
public void writeHeader(WritableByteChannel out) throws IOException { |
| 616 |
// take care of the annoying case where no records have been added...
|
| 617 |
if (headerLength == -1) { |
| 618 |
headerLength = MINIMUM_HEADER; |
| 619 |
} |
| 620 |
|
| 621 |
ByteBuffer buffer = ByteBuffer.allocateDirect(headerLength); |
| 622 |
buffer.order(ByteOrder.LITTLE_ENDIAN);
|
| 623 |
|
| 624 |
// write the output file type.
|
| 625 |
buffer.put((byte) MAGIC);
|
| 626 |
|
| 627 |
// write the date stuff
|
| 628 |
Calendar c = Calendar.getInstance(); |
| 629 |
c.setTime(new Date()); |
| 630 |
buffer.put((byte) (c.get(Calendar.YEAR) % 100)); |
| 631 |
buffer.put((byte) (c.get(Calendar.MONTH) + 1)); |
| 632 |
buffer.put((byte) (c.get(Calendar.DAY_OF_MONTH))); |
| 633 |
|
| 634 |
// write the number of records in the datafile.
|
| 635 |
buffer.putInt(recordCnt); |
| 636 |
|
| 637 |
// write the length of the header structure.
|
| 638 |
buffer.putShort((short) headerLength);
|
| 639 |
|
| 640 |
// write the length of a record
|
| 641 |
buffer.putShort((short) recordLength);
|
| 642 |
|
| 643 |
// // write the reserved bytes in the header
|
| 644 |
// for (int i=0; i<20; i++) out.writeByteLE(0);
|
| 645 |
buffer.position(buffer.position() + 20);
|
| 646 |
|
| 647 |
// write all of the header records
|
| 648 |
int tempOffset = 0; |
| 649 |
|
| 650 |
for (int i = 0; i < fields.length; i++) { |
| 651 |
// write the field name
|
| 652 |
for (int j = 0; j < 11; j++) { |
| 653 |
if (fields[i].fieldName.length() > j) {
|
| 654 |
buffer.put((byte) fields[i].fieldName.charAt(j));
|
| 655 |
} else {
|
| 656 |
buffer.put((byte) 0); |
| 657 |
} |
| 658 |
} |
| 659 |
|
| 660 |
// write the field type
|
| 661 |
buffer.put((byte) fields[i].fieldType);
|
| 662 |
|
| 663 |
// // write the field data address, offset from the start of the record.
|
| 664 |
buffer.putInt(tempOffset); |
| 665 |
tempOffset += fields[i].fieldLength; |
| 666 |
|
| 667 |
// write the length of the field.
|
| 668 |
buffer.put((byte) fields[i].fieldLength);
|
| 669 |
|
| 670 |
// write the decimal count.
|
| 671 |
buffer.put((byte) fields[i].decimalCount);
|
| 672 |
|
| 673 |
// write the reserved bytes.
|
| 674 |
//for (in j=0; jj<14; j++) out.writeByteLE(0);
|
| 675 |
buffer.position(buffer.position() + 14);
|
| 676 |
} |
| 677 |
|
| 678 |
// write the end of the field definitions marker
|
| 679 |
buffer.put((byte) 0x0D); |
| 680 |
|
| 681 |
buffer.position(0);
|
| 682 |
|
| 683 |
int r = buffer.remaining();
|
| 684 |
|
| 685 |
while ((r -= out.write(buffer)) > 0) { |
| 686 |
; // do nothing
|
| 687 |
} |
| 688 |
} |
| 689 |
|
| 690 |
/**
|
| 691 |
* Get a simple representation of this header.
|
| 692 |
*
|
| 693 |
* @return A String representing the state of the header.
|
| 694 |
*/
|
| 695 |
public String toString() { |
| 696 |
StringBuffer fs = new StringBuffer(); |
| 697 |
|
| 698 |
for (int i = 0, ii = fields.length; i < ii; i++) { |
| 699 |
DbaseField f = fields[i]; |
| 700 |
fs.append(f.fieldName + " " + f.fieldType + " " + f.fieldLength + |
| 701 |
" " + f.decimalCount + " " + f.fieldDataAddress + "\n"); |
| 702 |
} |
| 703 |
|
| 704 |
return "DB3 Header\n" + "Date : " + date + "\n" + "Records : " + |
| 705 |
recordCnt + "\n" + "Fields : " + fieldCnt + "\n" + fs; |
| 706 |
} |
| 707 |
|
| 708 |
/**
|
| 709 |
* Crea un DbaseFile.
|
| 710 |
*
|
| 711 |
* @return DbaseFileHeaderNIO
|
| 712 |
*
|
| 713 |
* @throws IOException .
|
| 714 |
*/
|
| 715 |
public static DbaseFileHeaderNIO createNewDbaseHeader() |
| 716 |
throws IOException { |
| 717 |
DbaseFileHeaderNIO header = new DbaseFileHeaderNIO();
|
| 718 |
|
| 719 |
for (int i = 0, ii = 1; i < ii; i++) { |
| 720 |
//AttributeType type = featureType.getAttributeType(i);
|
| 721 |
Class colType = Integer.class; |
| 722 |
String colName = "ID"; |
| 723 |
int fieldLen = 10; |
| 724 |
|
| 725 |
if (fieldLen <= 0) { |
| 726 |
fieldLen = 255;
|
| 727 |
} |
| 728 |
|
| 729 |
// @todo respect field length
|
| 730 |
if ((colType == Integer.class) || (colType == Short.class) || |
| 731 |
(colType == Byte.class)) {
|
| 732 |
header.addColumn(colName, 'N', Math.min(fieldLen, 10), 0); |
| 733 |
} else if (colType == Long.class) { |
| 734 |
header.addColumn(colName, 'N', Math.min(fieldLen, 19), 0); |
| 735 |
} else if ((colType == Double.class) || (colType == Float.class) || |
| 736 |
(colType == Number.class)) {
|
| 737 |
int l = Math.min(fieldLen, 33); |
| 738 |
int d = Math.max(l - 2, 0); |
| 739 |
header.addColumn(colName, 'N', l, d);
|
| 740 |
} else if (java.util.Date.class.isAssignableFrom(colType)) { |
| 741 |
header.addColumn(colName, 'D', fieldLen, 0); |
| 742 |
} else if (colType == Boolean.class) { |
| 743 |
header.addColumn(colName, 'L', 1, 0); |
| 744 |
} else if (CharSequence.class.isAssignableFrom(colType)) { |
| 745 |
// Possible fix for GEOT-42 : ArcExplorer doesn't like 0 length
|
| 746 |
// ensure that maxLength is at least 1
|
| 747 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), 0); |
| 748 |
} else if (Geometry.class.isAssignableFrom(colType)) { |
| 749 |
continue;
|
| 750 |
} else {
|
| 751 |
throw new IOException("Unable to write : " + colType.getName()); |
| 752 |
} |
| 753 |
} |
| 754 |
|
| 755 |
return header;
|
| 756 |
} |
| 757 |
|
| 758 |
/**
|
| 759 |
* DOCUMENT ME!
|
| 760 |
*
|
| 761 |
* @param sds DOCUMENT ME!
|
| 762 |
*
|
| 763 |
* @return DOCUMENT ME!
|
| 764 |
*
|
| 765 |
* @throws IOException DOCUMENT ME!
|
| 766 |
*/
|
| 767 |
public static DbaseFileHeaderNIO createDbaseHeader(SelectableDataSource sds) |
| 768 |
throws IOException { |
| 769 |
DbaseFileHeaderNIO header = new DbaseFileHeaderNIO();
|
| 770 |
|
| 771 |
try {
|
| 772 |
for (int i = 0, ii = sds.getFieldCount(); i < ii; i++) { |
| 773 |
//AttributeType type = featureType.getAttributeType(i);
|
| 774 |
Value value = sds.getFieldValue(0, i);
|
| 775 |
|
| 776 |
//int type = sds.getFieldType(i);
|
| 777 |
int type = getTypeValue(value);
|
| 778 |
String colName = sds.getFieldName(i);
|
| 779 |
|
| 780 |
///int fieldLen = ((DBFDriver)sds.getDriver()).getFieldLength(i);
|
| 781 |
int fieldLen = 100; //TODO aqu? el tama?o no es correcto hay que calcularlo, ahora mismo est? puesto a pi??n. |
| 782 |
int decimales = 5; |
| 783 |
|
| 784 |
// if (fieldLen <= 0) {
|
| 785 |
// fieldLen = 255;
|
| 786 |
// }
|
| 787 |
// @todo respect field length
|
| 788 |
switch (type) {
|
| 789 |
case (Value.DOUBLE):
|
| 790 |
case (Value.INTEGER):
|
| 791 |
case (Value.DECIMAL):
|
| 792 |
header.addColumn(colName, 'N', Math.min(fieldLen, 10), |
| 793 |
decimales); |
| 794 |
|
| 795 |
break;
|
| 796 |
|
| 797 |
case (Value.DATE):
|
| 798 |
header.addColumn(colName, 'D', fieldLen, 0); |
| 799 |
|
| 800 |
break;
|
| 801 |
|
| 802 |
case (Value.BOOLEAN):
|
| 803 |
header.addColumn(colName, 'L', 1, 0); |
| 804 |
|
| 805 |
break;
|
| 806 |
|
| 807 |
case (Value.STRING):
|
| 808 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), |
| 809 |
0);
|
| 810 |
} |
| 811 |
} |
| 812 |
} catch (DriverException e) {
|
| 813 |
e.printStackTrace(); |
| 814 |
} catch (SemanticException e) {
|
| 815 |
e.printStackTrace(); |
| 816 |
} |
| 817 |
|
| 818 |
return header;
|
| 819 |
} |
| 820 |
|
| 821 |
/**
|
| 822 |
* DOCUMENT ME!
|
| 823 |
*
|
| 824 |
* @param value DOCUMENT ME!
|
| 825 |
*
|
| 826 |
* @return DOCUMENT ME!
|
| 827 |
*
|
| 828 |
* @throws SemanticException DOCUMENT ME!
|
| 829 |
*/
|
| 830 |
private static int getTypeValue(Value value) throws SemanticException { |
| 831 |
if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.BooleanValue")) { |
| 832 |
return Value.BOOLEAN;
|
| 833 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.DateValue")) { |
| 834 |
return Value.DATE;
|
| 835 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.DoubleValue")) { |
| 836 |
return Value.DOUBLE;
|
| 837 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.FloatValue")) { |
| 838 |
return Value.FLOAT;
|
| 839 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.IntValue")) { |
| 840 |
return Value.INTEGER;
|
| 841 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.LongValue")) { |
| 842 |
return Value.LONG;
|
| 843 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.StringValue")) { |
| 844 |
return Value.STRING;
|
| 845 |
} else if (value.getClass().getName().equals("com.hardcode.gdbms.engine.values.NullValue")) { |
| 846 |
return Value.NULL;
|
| 847 |
} |
| 848 |
|
| 849 |
// default:
|
| 850 |
throw new SemanticException( |
| 851 |
"Unexpected className in getTypeValue (GDBMS)");
|
| 852 |
} |
| 853 |
|
| 854 |
/**
|
| 855 |
* Class for holding the information assicated with a record.
|
| 856 |
*/
|
| 857 |
class DbaseField { |
| 858 |
// Field Name
|
| 859 |
String fieldName;
|
| 860 |
|
| 861 |
// Field Type (C N L D or M)
|
| 862 |
char fieldType;
|
| 863 |
|
| 864 |
// Field Data Address offset from the start of the record.
|
| 865 |
int fieldDataAddress;
|
| 866 |
|
| 867 |
// Length of the data in bytes
|
| 868 |
int fieldLength;
|
| 869 |
|
| 870 |
// Field decimal count in Binary, indicating where the decimal is
|
| 871 |
int decimalCount;
|
| 872 |
} |
| 873 |
} |