svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.dbf / src / main / java / org / gvsig / fmap / dal / store / dbf / utils / DbaseFileHeader.java @ 40559
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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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 3
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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/*
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* Created on 16-feb-2004
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*
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* To change the template for this generated file go to
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* Window>Preferences>Java>Code Generation>Code and Comments
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*/
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package org.gvsig.fmap.dal.store.dbf.utils; |
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|
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import java.io.IOException; |
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import java.io.UnsupportedEncodingException; |
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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.charset.Charset; |
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import java.util.ArrayList; |
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import java.util.Calendar; |
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import java.util.Date; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Set; |
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import java.util.SortedMap; |
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|
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import org.gvsig.fmap.dal.DataTypes; |
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import org.gvsig.fmap.dal.exception.UnsupportedVersionException; |
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.exception.AttributeFeatureTypeNotSuportedException; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.utils.bigfile.BigByteBuffer2; |
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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 DbaseFileHeader { |
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// Constant for the size of a record
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private int FILE_DESCRIPTOR_SIZE = 32; |
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|
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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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// type of the file, must be 03h
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private int myFileType = 0x03; |
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// Date the file was last updated.
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private Date myUpdateDate = new Date(); |
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|
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// Number of records in the datafile
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private int myNumRecords = 0; |
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|
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// Length of the header structure
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private int myHeaderLength; |
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/**
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* Length of the records. Set to 1 as the default value as if there is
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* not any defined column, at least the deleted status initial byte
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* is taken into account.
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*/
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private int myRecordLength = 1; |
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// Number of fields in the record.
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private int myNumFields; |
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// collection of header records.
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private DbaseFieldDescriptor[] myFieldDescriptions; |
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private byte myLanguageID; |
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private List<String> encodingSupportedByString = null; |
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/**
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* DbaseFileHreader constructor comment.
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*/
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public DbaseFileHeader() {
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super();
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encodingSupportedByString = new ArrayList<String>(); |
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SortedMap<String, Charset> m = Charset.availableCharsets(); |
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Set<String> k = m.keySet(); |
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Iterator<String> it = k.iterator(); |
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while(it.hasNext()) {
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encodingSupportedByString.add(it.next()); |
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} |
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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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*
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* @param inFieldName DOCUMENT ME!
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* @param inFieldType DOCUMENT ME!
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* @param inFieldLength DOCUMENT ME!
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* @param inDecimalCount DOCUMENT ME!
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* @throws BadFieldDriverException
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*
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* @throws Exception DOCUMENT ME!
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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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throws AttributeFeatureTypeNotSuportedException {
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if (inFieldLength <= 0) { |
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inFieldLength = 1;
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} |
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if (myFieldDescriptions == null) { |
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myFieldDescriptions = new DbaseFieldDescriptor[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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DbaseFieldDescriptor[] tempFieldDescriptors = new DbaseFieldDescriptor[myFieldDescriptions.length + |
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1];
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for (int i = 0; i < myFieldDescriptions.length; i++) { |
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myFieldDescriptions[i].myFieldDataAddress = tempLength; |
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tempLength = tempLength + myFieldDescriptions[i].myFieldLength; |
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tempFieldDescriptors[i] = myFieldDescriptions[i]; |
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} |
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tempFieldDescriptors[myFieldDescriptions.length] = new DbaseFieldDescriptor();
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tempFieldDescriptors[myFieldDescriptions.length].myFieldLength = inFieldLength; |
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tempFieldDescriptors[myFieldDescriptions.length].myDecimalCount = inDecimalCount; |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldDataAddress = 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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if (tempFieldName.length() > 11) { |
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tempFieldName = tempFieldName.substring(0, 11); |
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warn("FieldName " + inFieldName +
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" is longer than 11 characters, truncating to " +
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tempFieldName); |
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} |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldName = tempFieldName; |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldName_trim = tempFieldName |
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.trim(); |
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|
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// the field type
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if ((inFieldType == 'C') || (inFieldType == 'c')) { |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myFieldLength = 8;
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} else if ((inFieldType == 'D') || (inFieldType == 'd')) { |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myFieldLength = 8;
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} else if ((inFieldType == 'F') || (inFieldType == 'f')) { |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myDecimalCount = 0;
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} |
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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[myFieldDescriptions.length].myDecimalCount = 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[myFieldDescriptions.length].myFieldType = '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[myFieldDescriptions.length].myFieldLength = 1;
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} else {
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throw new AttributeFeatureTypeNotSuportedException(tempFieldName, |
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inFieldType, ToolsLocator.getDataTypesManager().getTypeName(inFieldType), "DBF");
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} |
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// the length of a record
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tempLength = tempLength + |
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tempFieldDescriptors[myFieldDescriptions.length].myFieldLength; |
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// set the new fields.
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myFieldDescriptions = tempFieldDescriptors; |
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myHeaderLength = 33 + (32 * myFieldDescriptions.length); |
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myNumFields = myFieldDescriptions.length; |
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myRecordLength = 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 DOCUMENT ME!
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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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public int removeColumn(String inFieldName) { |
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int retCol = -1; |
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int tempLength = 1; |
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DbaseFieldDescriptor[] tempFieldDescriptors = new DbaseFieldDescriptor[myFieldDescriptions.length - |
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1];
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for (int i = 0, j = 0; i < myFieldDescriptions.length; i++) { |
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if (!inFieldName.equalsIgnoreCase(
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myFieldDescriptions[i].myFieldName.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 == (myFieldDescriptions.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] = myFieldDescriptions[i]; |
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tempFieldDescriptors[j].myFieldDataAddress = tempLength; |
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tempLength += tempFieldDescriptors[j].myFieldLength; |
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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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myFieldDescriptions = tempFieldDescriptors; |
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myHeaderLength = 33 + (32 * myFieldDescriptions.length); |
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myNumFields = myFieldDescriptions.length; |
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myRecordLength = 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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private void warn(String inWarn) { |
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//TODO Descomentar esto cuando tenga la clase warning support
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// warnings.warn(inWarn);
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} |
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/**
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* Return the Field Descriptor for the given field.
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*
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* @param inIndex DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*/
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public DbaseFieldDescriptor getFieldDescription(int inIndex) { |
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return myFieldDescriptions[inIndex];
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} |
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// Retrieve the length of the field at the given index
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public int getFieldLength(int inIndex) { |
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return myFieldDescriptions[inIndex].myFieldLength;
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} |
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// Retrieve the location of the decimal point within the field.
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public int getFieldDecimalCount(int inIndex) { |
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return myFieldDescriptions[inIndex].myDecimalCount;
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} |
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// Retrieve the Name of the field at the given index
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public String getFieldName(int inIndex) { |
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return myFieldDescriptions[inIndex].myFieldName;
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} |
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public int getFieldIndex(String name) { |
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for (int i = 0; i < myFieldDescriptions.length; i++) { |
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if (myFieldDescriptions[i].myFieldName_trim
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.equalsIgnoreCase(name)) { |
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return i;
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} |
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} |
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return -1; |
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} |
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// Retrieve the type of field at the given index
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public char getFieldType(int inIndex) { |
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return myFieldDescriptions[inIndex].myFieldType;
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} |
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/**
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* Return the date this file was last updated.
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*
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* @return DOCUMENT ME!
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*/
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public Date getLastUpdateDate() { |
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return myUpdateDate;
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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 DOCUMENT ME!
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*/
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public int getNumFields() { |
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return myNumFields;
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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 DOCUMENT ME!
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*/
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public int getNumRecords() { |
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return myNumRecords;
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} |
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/**
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* Return the length of the records in bytes.
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*
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* @return DOCUMENT ME!
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*/
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public int getRecordLength() { |
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return myRecordLength;
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} |
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|
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/**
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* Return the length of the header
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*
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* @return DOCUMENT ME!
|
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*/
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public int getHeaderLength() { |
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return myHeaderLength;
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} |
399 |
|
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/**
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* Read the header data from the DBF file.
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*
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* @param in
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* DOCUMENT ME!
|
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* @throws UnsupportedVersionException
|
406 |
* @throws UnsupportedEncodingException
|
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*
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* @throws IOException
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* DOCUMENT ME!
|
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*/
|
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public void readHeader(BigByteBuffer2 in, String charsName) |
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throws UnsupportedVersionException, UnsupportedEncodingException { |
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// type of file.
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myFileType = in.get(); |
415 |
|
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if (myFileType != 0x03) { |
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throw new UnsupportedVersionException("DBF", Integer |
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.toHexString(myFileType)); |
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} |
420 |
|
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// parse the update date information.
|
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int tempUpdateYear = in.get();
|
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int tempUpdateMonth = in.get();
|
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int tempUpdateDay = in.get();
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tempUpdateYear = tempUpdateYear + 1900;
|
426 |
|
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Calendar c = Calendar.getInstance(); |
428 |
c.set(Calendar.YEAR, tempUpdateYear);
|
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c.set(Calendar.MONTH, tempUpdateMonth - 1); |
430 |
c.set(Calendar.DATE, tempUpdateDay);
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myUpdateDate = c.getTime(); |
432 |
|
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// read the number of records.
|
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in.order(ByteOrder.LITTLE_ENDIAN);
|
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myNumRecords = in.getInt(); |
436 |
|
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// read the length of the header structure.
|
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myHeaderLength = in.getShort(); |
439 |
|
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// read the length of a record
|
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myRecordLength = in.getShort(); //posicon 0h
|
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|
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in.order(ByteOrder.BIG_ENDIAN);
|
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|
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// skip the reserved bytes in the header.
|
446 |
// in.position(in.position() + 20);
|
447 |
|
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// Leemos el byte de language
|
449 |
in.position(29);
|
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myLanguageID = in.get(); |
451 |
if (charsName == null) { |
452 |
charsName = getCharsetName(); |
453 |
charsName = mappingEncoding(charsName); |
454 |
} |
455 |
|
456 |
|
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// Posicionamos para empezar a leer los campos.
|
458 |
in.position(32);
|
459 |
|
460 |
// calculate the number of Fields in the header
|
461 |
myNumFields = (myHeaderLength - FILE_DESCRIPTOR_SIZE - 1) / FILE_DESCRIPTOR_SIZE;
|
462 |
|
463 |
// read all of the header records
|
464 |
myFieldDescriptions = new DbaseFieldDescriptor[myNumFields];
|
465 |
int fieldOffset = 0; |
466 |
|
467 |
for (int i = 0; i < myNumFields; i++) { |
468 |
myFieldDescriptions[i] = new DbaseFieldDescriptor();
|
469 |
|
470 |
// read the field name
|
471 |
byte[] buffer = new byte[11]; |
472 |
in.get(buffer); |
473 |
if (charsName != null) { |
474 |
myFieldDescriptions[i].myFieldName = new String(buffer, |
475 |
charsName); |
476 |
} else {
|
477 |
myFieldDescriptions[i].myFieldName = new String(buffer); |
478 |
} |
479 |
myFieldDescriptions[i].myFieldName_trim = myFieldDescriptions[i].myFieldName |
480 |
.trim(); |
481 |
|
482 |
// read the field type
|
483 |
myFieldDescriptions[i].myFieldType = (char) in.get();
|
484 |
|
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// read the field data address, offset from the start of the record.
|
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myFieldDescriptions[i].myFieldDataAddress = in.getInt(); |
487 |
|
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// read the field length in bytes
|
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int tempLength = in.get();
|
490 |
|
491 |
if (tempLength < 0) { |
492 |
tempLength = tempLength + 256;
|
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} |
494 |
|
495 |
myFieldDescriptions[i].myFieldLength = tempLength; |
496 |
|
497 |
// read the field decimal count in bytes
|
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myFieldDescriptions[i].myDecimalCount = in.get(); |
499 |
|
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// NUEVO: Calculamos los offsets aqu? para no
|
501 |
// tener que recalcular cada vez que nos piden
|
502 |
// algo.
|
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myFieldDescriptions[i].myFieldDataAddress = fieldOffset; |
504 |
fieldOffset += tempLength; |
505 |
// Fin NUEVO
|
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// read the reserved bytes.
|
507 |
in.position(in.position() + 14);
|
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} |
509 |
|
510 |
// Last byte is a marker for the end of the field definitions.
|
511 |
in.get(); |
512 |
} |
513 |
|
514 |
/**
|
515 |
* Set the number of records in the file
|
516 |
*
|
517 |
* @param inNumRecords DOCUMENT ME!
|
518 |
*/
|
519 |
public void setNumRecords(int inNumRecords) { |
520 |
myNumRecords = inNumRecords; |
521 |
} |
522 |
|
523 |
/*
|
524 |
* Write the header data to the DBF file.
|
525 |
*
|
526 |
* @param out DOCUMENT ME!
|
527 |
*
|
528 |
* @throws Exception DOCUMENT ME!
|
529 |
*
|
530 |
public void writeHeader(LEDataOutputStream out) throws Exception {
|
531 |
// write the output file type.
|
532 |
out.writeByte(myFileType);
|
533 |
// write the date stuff
|
534 |
Calendar c = Calendar.getInstance();
|
535 |
c.setTime(new Date());
|
536 |
out.writeByte(c.get(Calendar.YEAR) - 1900);
|
537 |
out.writeByte(c.get(Calendar.MONTH) + 1);
|
538 |
out.writeByte(c.get(Calendar.DAY_OF_MONTH));
|
539 |
// write the number of records in the datafile.
|
540 |
out.writeInt(myNumRecords);
|
541 |
// write the length of the header structure.
|
542 |
out.writeShort(myHeaderLength);
|
543 |
// write the length of a record
|
544 |
out.writeShort(myRecordLength);
|
545 |
// write the reserved bytes in the header
|
546 |
for (int i = 0; i < 20; i++)
|
547 |
out.writeByte(0);
|
548 |
// write all of the header records
|
549 |
int tempOffset = 0;
|
550 |
for (int i = 0; i < myFieldDescriptions.length; i++) {
|
551 |
// write the field name
|
552 |
for (int j = 0; j < 11; j++) {
|
553 |
if (myFieldDescriptions[i].myFieldName.length() > j) {
|
554 |
out.writeByte((int) myFieldDescriptions[i].myFieldName.charAt(
|
555 |
j));
|
556 |
} else {
|
557 |
out.writeByte(0);
|
558 |
}
|
559 |
}
|
560 |
// write the field type
|
561 |
out.writeByte(myFieldDescriptions[i].myFieldType);
|
562 |
// write the field data address, offset from the start of the record.
|
563 |
out.writeInt(tempOffset);
|
564 |
tempOffset += myFieldDescriptions[i].myFieldLength;
|
565 |
// write the length of the field.
|
566 |
out.writeByte(myFieldDescriptions[i].myFieldLength);
|
567 |
// write the decimal count.
|
568 |
out.writeByte(myFieldDescriptions[i].myDecimalCount);
|
569 |
// write the reserved bytes.
|
570 |
for (int j = 0; j < 14; j++)
|
571 |
out.writeByte(0);
|
572 |
}
|
573 |
// write the end of the field definitions marker
|
574 |
out.writeByte(0x0D);
|
575 |
}
|
576 |
*/
|
577 |
|
578 |
/**
|
579 |
* Class for holding the information assicated with a record.
|
580 |
*/
|
581 |
class DbaseFieldDescriptor { |
582 |
// Field Name
|
583 |
String myFieldName;
|
584 |
|
585 |
String myFieldName_trim;
|
586 |
|
587 |
// Field Type (C N L D F or M)
|
588 |
char myFieldType;
|
589 |
|
590 |
// Field Data Address offset from the start of the record.
|
591 |
int myFieldDataAddress;
|
592 |
|
593 |
// Length of the data in bytes
|
594 |
int myFieldLength;
|
595 |
|
596 |
// Field decimal count in Binary, indicating where the decimal is
|
597 |
int myDecimalCount;
|
598 |
} |
599 |
|
600 |
public byte getLanguageID() { |
601 |
return myLanguageID;
|
602 |
} |
603 |
|
604 |
|
605 |
|
606 |
public static DbaseFileHeader createDbaseHeader(FeatureType featureType) |
607 |
throws AttributeFeatureTypeNotSuportedException {
|
608 |
DbaseFileHeader header = new DbaseFileHeader();
|
609 |
Iterator iterator=featureType.iterator();
|
610 |
// TODO header.myLanguageID = langId;
|
611 |
while (iterator.hasNext()) {
|
612 |
FeatureAttributeDescriptor descriptor = (FeatureAttributeDescriptor) iterator.next(); |
613 |
|
614 |
|
615 |
int type = descriptor.getType();
|
616 |
String colName = descriptor.getName();
|
617 |
|
618 |
int fieldLen = descriptor.getSize(); // TODO aqu? el |
619 |
// tama?o no es
|
620 |
// correcto hay que
|
621 |
// calcularlo, ahora
|
622 |
// mismo est? puesto
|
623 |
// a pi??n.
|
624 |
int decimales = descriptor.getPrecision();
|
625 |
if ((type==DataTypes.DOUBLE || type==DataTypes.FLOAT) && decimales==0){ |
626 |
decimales=1;
|
627 |
} |
628 |
|
629 |
if (DataTypes.DOUBLE == type || DataTypes.FLOAT == type
|
630 |
|| DataTypes.INT == type || DataTypes.LONG == type) { |
631 |
header.addColumn(colName, 'N', Math.min(fieldLen, 18), |
632 |
decimales); |
633 |
} else if (DataTypes.DATE == type) { |
634 |
header.addColumn(colName, 'D', fieldLen, 0); |
635 |
} else if (DataTypes.BOOLEAN == type) { |
636 |
header.addColumn(colName, 'L', 1, 0); |
637 |
} else if (DataTypes.STRING == type) { |
638 |
header.addColumn(colName, 'C', Math.min(254, fieldLen), 0); |
639 |
} |
640 |
|
641 |
|
642 |
} |
643 |
return header;
|
644 |
} |
645 |
/**
|
646 |
* Write the header data to the DBF file.
|
647 |
*
|
648 |
* @param out
|
649 |
* A channel to write to. If you have an OutputStream you can
|
650 |
* obtain the correct channel by using
|
651 |
* java.nio.Channels.newChannel(OutputStream out).
|
652 |
*
|
653 |
* @throws IOException
|
654 |
* If errors occur.
|
655 |
*/
|
656 |
public void writeHeader(FileChannel out) throws IOException { |
657 |
// take care of the annoying case where no records have been added...
|
658 |
if (myHeaderLength <= 0) { |
659 |
myHeaderLength = MINIMUM_HEADER; |
660 |
} |
661 |
|
662 |
// Desde el principio
|
663 |
out.position(0);
|
664 |
|
665 |
ByteBuffer buffer = ByteBuffer.allocateDirect(myHeaderLength); |
666 |
buffer.order(ByteOrder.LITTLE_ENDIAN);
|
667 |
|
668 |
// write the output file type.
|
669 |
buffer.put(MAGIC); |
670 |
|
671 |
// write the date stuff
|
672 |
Calendar c = Calendar.getInstance(); |
673 |
c.setTime(new Date()); |
674 |
buffer.put((byte) (c.get(Calendar.YEAR) % 100)); |
675 |
buffer.put((byte) (c.get(Calendar.MONTH) + 1)); |
676 |
buffer.put((byte) (c.get(Calendar.DAY_OF_MONTH))); |
677 |
|
678 |
// write the number of records in the datafile.
|
679 |
buffer.putInt(myNumRecords); |
680 |
|
681 |
// write the length of the header structure.
|
682 |
buffer.putShort((short) myHeaderLength);
|
683 |
|
684 |
// write the length of a record
|
685 |
buffer.putShort((short) myRecordLength);
|
686 |
|
687 |
// // write the reserved bytes in the header
|
688 |
// for (int i=0; i<20; i++) out.writeByteLE(0);
|
689 |
buffer.position(buffer.position() + 20);
|
690 |
|
691 |
// write all of the header records
|
692 |
int tempOffset = 0; |
693 |
|
694 |
if (myFieldDescriptions != null) { |
695 |
for (int i = 0; i < myFieldDescriptions.length; i++) { |
696 |
// write the field name
|
697 |
for (int j = 0; j < 11; j++) { |
698 |
if (myFieldDescriptions[i].myFieldName.length() > j) {
|
699 |
buffer.put((byte) myFieldDescriptions[i].myFieldName.charAt(j));
|
700 |
} else {
|
701 |
buffer.put((byte) 0); |
702 |
} |
703 |
} |
704 |
|
705 |
// write the field type
|
706 |
buffer.put((byte) myFieldDescriptions[i].myFieldType);
|
707 |
|
708 |
// // write the field data address, offset from the start of the
|
709 |
// record.
|
710 |
buffer.putInt(tempOffset); |
711 |
tempOffset += myFieldDescriptions[i].myFieldLength; |
712 |
|
713 |
// write the length of the field.
|
714 |
buffer.put((byte) myFieldDescriptions[i].myFieldLength);
|
715 |
|
716 |
// write the decimal count.
|
717 |
buffer.put((byte) myFieldDescriptions[i].myDecimalCount);
|
718 |
|
719 |
// write the reserved bytes.
|
720 |
// for (in j=0; jj<14; j++) out.writeByteLE(0);
|
721 |
buffer.position(buffer.position() + 14);
|
722 |
} |
723 |
} |
724 |
// write the end of the field definitions marker
|
725 |
buffer.put((byte) 0x0D); |
726 |
|
727 |
buffer.position(0);
|
728 |
|
729 |
int r = buffer.remaining();
|
730 |
|
731 |
while ((r -= out.write(buffer)) > 0) { |
732 |
; // do nothing
|
733 |
} |
734 |
} |
735 |
|
736 |
/**
|
737 |
* 01h DOS USA code page 437
|
738 |
02h DOS Multilingual code page 850
|
739 |
03h Windows ANSI code page 1252
|
740 |
04h Standard Macintosh
|
741 |
64h EE MS-DOS code page 852
|
742 |
65h Nordic MS-DOS code page 865
|
743 |
66h Russian MS-DOS code page 866
|
744 |
67h Icelandic MS-DOS
|
745 |
68h Kamenicky (Czech) MS-DOS
|
746 |
69h Mazovia (Polish) MS-DOS
|
747 |
6Ah Greek MS-DOS (437G)
|
748 |
6Bh Turkish MS-DOS
|
749 |
96h Russian Macintosh
|
750 |
97h Eastern European Macintosh
|
751 |
98h Greek Macintosh
|
752 |
C8h Windows EE code page 1250
|
753 |
C9h Russian Windows
|
754 |
CAh Turkish Windows
|
755 |
CBh Greek Windows
|
756 |
* @return
|
757 |
*/
|
758 |
public String getCharsetName() { |
759 |
switch (getLanguageID()) {
|
760 |
case 0x01: |
761 |
return "US-ASCII"; |
762 |
case 0x02: |
763 |
return "ISO-8859-1"; |
764 |
case 0x03: |
765 |
return "windows-1252"; |
766 |
case 0x04: |
767 |
return "mac"; |
768 |
case 0x64: |
769 |
return "ISO-8859-1"; |
770 |
case 0x65: |
771 |
return "ISO-8859-1"; |
772 |
case 0x66: |
773 |
return "ISO-8859-1"; |
774 |
case 0x67: |
775 |
return "ISO-8859-1"; |
776 |
case 0x68: |
777 |
return "greek"; |
778 |
case 0x69: |
779 |
return "ISO-8859-1"; |
780 |
case 0x6A: |
781 |
return "greek"; |
782 |
case 0x6B: |
783 |
return "ISO-8859-1"; |
784 |
|
785 |
default:
|
786 |
return "ISO-8859-1"; |
787 |
} |
788 |
} |
789 |
|
790 |
public String mappingEncoding(String dbfEnconding) { |
791 |
if(encodingSupportedByString.contains(dbfEnconding))
|
792 |
return dbfEnconding;
|
793 |
else
|
794 |
return "UTF-8"; |
795 |
} |
796 |
|
797 |
} |