svn-gvsig-desktop / branches / Mobile_Compatible_Hito_1 / libFMap_mobile_shp_driver / src-file / org / gvsig / data / datastores / vectorial / file / shp_mem / DbaseFileNIO.java @ 21865
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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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/************************************************
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* *
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* Modfied By: *
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* Prodevelop Integraci?n de Tecnolog?as SL *
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* Conde Salvatierra de ?lava , 34-10 *
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* 46004 Valencia *
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* Spain *
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* *
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* +34 963 510 612 *
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* +34 963 510 968 *
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* gis@prodevelop.es *
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* http://www.prodevelop.es *
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* *
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* gvSIG Mobile Team 2006 *
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* *
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************************************************/
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package org.gvsig.data.datastores.vectorial.file.shp_mem; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.IOException; |
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import java.io.UnsupportedEncodingException; |
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import org.apache.log4j.Logger; |
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import org.gvsig.data.datastores.vectorial.file.FalseByteBuffer; |
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import org.gvsig.data.datastores.vectorial.file.Utils; |
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/**
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* Class to read and write data to a dbase III format file. Creation date:
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* (5/15/2001 5:15:13 PM)
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*/
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public class DbaseFileNIO { |
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private static Logger logger = Logger.getLogger(DbaseFileNIO.class); |
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// Header information for the DBase File
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private DbaseFileHeaderNIO myHeader;
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private FileInputStream fin; |
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private FalseByteBuffer buffer;
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/*
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CharBuffer charBuffer;
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CharsetDecoder decoder;
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Charset chars;
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*/
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/**
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* Retrieve number of records in the DbaseFile
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*
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* @return N?mero de registros.
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*/
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public int getRecordCount() { |
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return myHeader.getNumRecords();
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} |
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/**
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* Devuelve el n?mero de fields.
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*
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* @return N?mero de fields.
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*/
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public int getFieldCount() { |
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return myHeader.getNumFields();
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} |
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public int getFieldIntType(int inIndex) { |
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return myHeader.getFieldIntType(inIndex);
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} |
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/**
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* Devuelve el valor de un boolean a partir de su n?mero de fila y de
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* field.
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*
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* @param rowIndex N?mero de fila.
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* @param fieldId N?mero columna.
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*
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* @return boolean.
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*/
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public boolean getBooleanFieldValue(int rowIndex, int fieldId) { |
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int recordOffset = (myHeader.getRecordLength() * rowIndex) +
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myHeader.getHeaderLength() + 1;
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//Se calcula el offset del campo
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int fieldOffset = 0; |
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for (int i = 0; i < (fieldId - 1); i++) { |
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fieldOffset += myHeader.getFieldLength(i); |
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} |
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buffer.position(recordOffset + fieldOffset); |
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char bool = (char) buffer.getByte(); |
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return ((bool == 't') || (bool == 'T') || (bool == 'Y') || |
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(bool == 'y'));
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} |
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/**
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* Devuelve el String a partir del n?mero de fila y columna.
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*
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* @param rowIndex N?mero de fila.
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* @param fieldId N?mero de columna.
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*
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* @return String.
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* @throws UnsupportedEncodingException
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*/
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public String getStringFieldValue(int rowIndex, int fieldId) { // throws UnsupportedEncodingException { |
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int recordOffset = (myHeader.getRecordLength() * rowIndex) +
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myHeader.getHeaderLength() + 1;
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//Se calcula el offset del campo
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int fieldOffset = 0; |
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for (int i = 0; i < fieldId; i++) { |
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fieldOffset += myHeader.getFieldLength(i); |
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} |
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buffer.position(recordOffset + fieldOffset); |
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byte[] data = new byte[myHeader.getFieldLength(fieldId)]; |
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// ByteBuffer byteBuffer = ByteBuffer.wrap(data);
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buffer.getBytes(data); |
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return new String(data); //, chars.name()); |
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} |
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/**
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* Devuelve el Number a partir de una fila y columna.
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*
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* @param rowIndex N?mero fila.
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* @param fieldId N?mero columna.
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*
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* @return Number.
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*/
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public Number getNumberFieldValue(int rowIndex, int fieldId) { |
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//System.out.println("rowIndex = "+rowIndex+ " , "+"fieldId = "+fieldId);
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int recordOffset = (myHeader.getRecordLength() * rowIndex) +
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myHeader.getHeaderLength() + 1;
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//Se calcula el offset del campo
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int fieldOffset = 0; |
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for (int i = 0; i < fieldId; i++) { |
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fieldOffset += myHeader.getFieldLength(i); |
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} |
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buffer.position(recordOffset + fieldOffset); |
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byte[] data = new byte[myHeader.getFieldLength(fieldId)]; |
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buffer.getBytes(data); |
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String s = new String(data); |
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s = s.trim(); |
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if (getFieldType(fieldId) == 'N') { |
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Object tempObject = Double.valueOf(s); |
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return new Double(tempObject.toString()); |
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} else {
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Object tempObject = Integer.valueOf(s); |
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return new Integer(tempObject.toString()); |
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} |
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//return 0;
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} |
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// Retrieve the record at the given index
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/* public Object[] getRecord(long inIndex) throws IOException {
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long nRecordOffset = (myHeader.getRecordLength() * inIndex) +
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myHeader.getHeaderLength();
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// retrieve the record length
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int tempNumFields = myHeader.getNumFields();
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// storage for the actual values
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Object[] tempRow = new Object[tempNumFields];
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buffer.position((int) nRecordOffset);
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// read the deleted flag
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char tempDeleted = (char) buffer.get();
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// read the record length
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int tempRecordLength = 1; // for the deleted character just read.
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// read the Fields
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for (int j = 0; j < tempNumFields; j++) {
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// find the length of the field.
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int tempFieldLength = myHeader.getFieldLength(j);
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tempRecordLength = tempRecordLength + tempFieldLength;
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// find the field type
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char tempFieldType = myHeader.getFieldType(j);
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//System.out.print("Reading Name="+myHeader.getFieldName(j)+" Type="+tempFieldType +" Length="+tempFieldLength);
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// read the data.
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Object tempObject = null;
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switch (tempFieldType) {
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case 'L': // logical data type, one character (T,t,F,f,Y,y,N,n)
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char tempChar = (char) buffer.get();
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if ((tempChar == 'T') || (tempChar == 't') ||
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(tempChar == 'Y') || (tempChar == 'y')) {
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tempObject = new Boolean(true);
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} else {
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tempObject = new Boolean(false);
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}
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break;
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case 'C': // character record.
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byte[] sbuffer = new byte[tempFieldLength];
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buffer.get(sbuffer);
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tempObject = new String(sbuffer, "ISO-8859-1").trim();
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break;
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case 'D': // date data type.
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byte[] dbuffer = new byte[8];
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buffer.get(dbuffer);
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String tempString = new String(dbuffer, 0, 4);
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try {
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int tempYear = Integer.parseInt(tempString);
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tempString = new String(dbuffer, 4, 2);
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int tempMonth = Integer.parseInt(tempString) - 1;
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tempString = new String(dbuffer, 6, 2);
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int tempDay = Integer.parseInt(tempString);
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Calendar c = Calendar.getInstance();
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c.set(Calendar.YEAR, tempYear);
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c.set(Calendar.MONTH, tempMonth);
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c.set(Calendar.DAY_OF_MONTH, tempDay);
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tempObject = c.getTime();
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} catch (NumberFormatException e) {
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}
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break;
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case 'M': // memo field.
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byte[] mbuffer = new byte[10];
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buffer.get(mbuffer);
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break;
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case 'N': // number
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case 'F': // floating point number
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byte[] fbuffer = new byte[tempFieldLength];
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buffer.get(fbuffer);
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try {
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tempString = new String(fbuffer);
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tempObject = Double.valueOf(tempString.trim());
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} catch (NumberFormatException e) {
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}
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break;
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default:
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byte[] defbuffer = new byte[tempFieldLength];
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buffer.get(defbuffer);
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System.out.println("Do not know how to parse Field type " +
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tempFieldType);
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}
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tempRow[j] = tempObject;
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// System.out.println(" Data="+tempObject);
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}
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// ensure that the full record has been read.
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if (tempRecordLength < myHeader.getRecordLength()) {
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byte[] tempbuff = new byte[myHeader.getRecordLength() -
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tempRecordLength];
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buffer.get(tempbuff);
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/* if (tempTelling){
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System.out.println("DBF File has "+(myHeader.getRecordLength()-tempRecordLength)+" extra bytes per record");
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tempTelling = false;
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} */
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/* }
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return tempRow;
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}
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*/
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/**
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* Retrieve the name of the given column.
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*
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* @param inIndex ?ndice.
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*
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* @return nombre del campo.
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*/
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public String getFieldName(int inIndex) { |
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return myHeader.getFieldName(inIndex).trim();
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} |
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/**
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* Retrieve the type of the given column.
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*
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* @param inIndex ?ndice.
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*
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* @return tipo de campo.
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*/
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public char getFieldType(int inIndex) { |
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return myHeader.getFieldType(inIndex);
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} |
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/**
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* Retrieve the length of the given column.
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*
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* @param inIndex indice.
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*
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* @return longitud del field.
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*/
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public int getFieldLength(int inIndex) { |
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return myHeader.getFieldLength(inIndex);
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} |
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/*
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* Retrieve the value of the given column as string.
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*
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* @param idField
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* @param idRecord
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*
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* @return
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*
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public Object getFieldValue(int idField, long idRecord) throws IOException {
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Object[] tmpReg = getRecord(idRecord);
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return tmpReg[idField];
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}
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*/
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/*
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*
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*
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* @param idField
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* @param idRecord
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*
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* @return
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*
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public double getFieldValueAsDouble(int idField, int idRecord) throws IOException {
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Object[] tmpReg = getRecord(idRecord);
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return (double) Double.parseDouble(tmpReg[idField].toString());
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}
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*/
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/**
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* Retrieve the location of the decimal point.
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*
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* @param inIndex ?ndice.
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*
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* @return localizaci?n.
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*/
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public int getFieldDecimalLength(int inIndex) { |
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return myHeader.getFieldDecimalCount(inIndex);
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} |
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/**
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* read the DBF file into memory.
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*
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* @param file Fichero.
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*
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* @throws IOException
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*/
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public void open(File file) throws IOException { |
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// logger.debug("open(file) de DBaseFileNIO");
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fin = new FileInputStream(file); |
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// channel = fin.getChannel();
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// channel = FileChannelImpl.open(fin.getFD(), true, false, fin);
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// buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
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// buffer = ByteBuffer.allocate((int) file.length()); //new BigByteBuffer2(channel, FileChannel.MapMode.READ_ONLY);
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buffer = Utils.loadFileInputStream(fin, (int) file.length());
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// logger.debug("buffer = " + buffer);
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// create the header to contain the header information.
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myHeader = new DbaseFileHeaderNIO();
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myHeader.readHeader(buffer); |
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/*
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charBuffer = CharBuffer.allocate(myHeader.getRecordLength() - 1);
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chars = Charset.forName("ISO-8859-1");
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decoder = chars.newDecoder();
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*/
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} |
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/**
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* Removes all data from the dataset
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*
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* @throws IOException .
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*/
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public void close() throws IOException { |
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fin.close(); |
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} |
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/**
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* @return Returns the DbaseFileHeaderNIO.
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*/
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public DbaseFileHeaderNIO getDBaseHeader() {
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return myHeader;
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} |
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} |