root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / dbf / DBFDriver.java @ 32111
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package com.iver.cit.gvsig.fmap.drivers.dbf; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.RandomAccessFile; |
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import java.io.UnsupportedEncodingException; |
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import java.nio.channels.FileChannel; |
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import java.nio.channels.WritableByteChannel; |
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import java.nio.charset.Charset; |
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import java.sql.Types; |
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import java.text.DateFormat; |
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import java.text.ParseException; |
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import java.util.Date; |
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import java.util.Locale; |
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import java.util.Properties; |
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import java.util.prefs.Preferences; |
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import com.hardcode.gdbms.driver.DriverUtilities; |
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import com.hardcode.gdbms.driver.exceptions.BadFieldDriverException; |
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import com.hardcode.gdbms.driver.exceptions.CloseDriverException; |
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import com.hardcode.gdbms.driver.exceptions.InitializeWriterException; |
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import com.hardcode.gdbms.driver.exceptions.OpenDriverException; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.driver.exceptions.WriteDriverException; |
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import com.hardcode.gdbms.engine.data.DataSourceFactory; |
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import com.hardcode.gdbms.engine.data.driver.FileDriver; |
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import com.hardcode.gdbms.engine.data.edition.DataWare; |
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import com.hardcode.gdbms.engine.data.file.FileDataWare; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.hardcode.gdbms.engine.values.ValueFactory; |
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import com.iver.cit.gvsig.exceptions.visitors.ProcessWriterVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.StartWriterVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.StopWriterVisitorException; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.cit.gvsig.fmap.drivers.ITableDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.TableDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.shp.DbaseFileHeaderNIO; |
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import com.iver.cit.gvsig.fmap.drivers.shp.DbaseFileWriterNIO; |
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import com.iver.cit.gvsig.fmap.edition.IRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.IWriteable; |
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import com.iver.cit.gvsig.fmap.edition.IWriter; |
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import com.iver.cit.gvsig.fmap.edition.fieldmanagers.AbstractFieldManager; |
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import com.iver.cit.gvsig.fmap.edition.writers.dbf.DbfWriter; |
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import com.iver.utiles.NumberUtilities; |
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/**
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* DOCUMENT ME!
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class DBFDriver extends AbstractFieldManager implements FileDriver, IWriteable, IWriter { |
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//private File file;
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private static Preferences prefs = Preferences.userRoot().node( "gvSIG.encoding.dbf" ); |
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private static Locale ukLocale = new Locale("en", "UK"); // English, UK version |
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private DbaseFile dbf = new DbaseFile(); |
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private char[] fieldTypes; |
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private DataSourceFactory dsf;
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private DbfWriter dbfWriter = new DbfWriter(); |
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private File file = null; |
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private static String tempDirectoryPath = System.getProperty("java.io.tmpdir"); |
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private File fTemp; |
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private ITableDefinition tableDef;
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private Charset charSet = null; |
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public Charset getCharSet() { |
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return charSet;
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} |
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public void setCharSet(Charset charSet) { |
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this.charSet = charSet;
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} |
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/**
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* @see com.hardcode.driverManager.Driver#getName()
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*/
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public String getName() { |
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return "gdbms dbf driver"; |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.GDBMSDriver#open(java.io.File)
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*/
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public void open(File file) throws OpenDriverException { |
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this.file = file;
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try {
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if (charSet == null){ |
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String charSetName=prefs.get("dbf_encoding", DbaseFile.getDefaultCharset().toString()); |
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dbf.setCharSet(Charset.forName(charSetName));
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} |
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dbf.open(file); |
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// Despu?s de abrir el fichero sabemos cual es su charset
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setCharSet(dbf.getCharSet()); |
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fieldTypes = new char[getFieldCount()]; |
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for (int i = 0; i < fieldTypes.length; i++) { |
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fieldTypes[i] = dbf.getFieldType(i); |
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} |
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int aux = (int)(Math.random() * 1000); |
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//fTemp = new File(tempDirectoryPath + "/tmpDbf" + aux + ".dbf");
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if(fTemp == null) { |
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fTemp = new File(file.getAbsolutePath() + ".tmp.dbf"); |
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dbfWriter.setFile(fTemp); |
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} |
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if (charSet != null) |
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dbfWriter.setCharset(charSet); |
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} catch (ReadDriverException e) {
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throw new OpenDriverException(getName(),e); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.GDBMSDriver#close()
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*/
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public void close() throws CloseDriverException { |
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try {
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dbf.close(); |
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} catch (IOException e) { |
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throw new CloseDriverException(getName(),e); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldValue(long,
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* int)
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*/
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public Value getFieldValue(long rowIndex, int fieldId) |
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throws ReadDriverException {
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// Field Type (C or M)
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char cfieldType = fieldTypes[fieldId];
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int fieldType = getFieldType(fieldId);
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String strValue;
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if (cfieldType == 'D') { |
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String date;
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try {
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date = dbf.getStringFieldValue((int) rowIndex, fieldId).trim();
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} catch (UnsupportedEncodingException e1) { |
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throw new ReadDriverException(getName(),e1); |
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} |
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// System.out.println(rowIndex + " data=" + date);
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if (date.length()<8) { |
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return null; |
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} |
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String year = date.substring(0, 4); |
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String month = date.substring(4, 6); |
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String day = date.substring(6, 8); |
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DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, ukLocale); |
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/* Calendar c = Calendar.getInstance();
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c.clear();
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c.set(Integer.parseInt(year), Integer.parseInt(month),
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Integer.parseInt(day));
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c.set(Calendar.MILLISECOND, 0); */
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String strAux = month + "/" + day + "/" + year; |
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Date dat;
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try {
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dat = df.parse(strAux); |
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} catch (ParseException e) { |
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throw new ReadDriverException(getName(),e); |
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} |
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// System.out.println("numReg = " + rowIndex + " date:" + dat.getTime());
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return ValueFactory.createValue(dat);
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} else {
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try {
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strValue = dbf.getStringFieldValue((int) rowIndex, fieldId);
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// System.out.println(strValue);
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} catch (UnsupportedEncodingException e1) { |
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throw new BadFieldDriverException(getName(),e1); |
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} |
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strValue = strValue.trim(); |
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if (fieldType == Types.BOOLEAN){ |
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strValue = strValue.toLowerCase(); |
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strValue = Boolean.toString(strValue.equals("t") || strValue.equals("y")); |
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} |
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try {
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return ValueFactory.createValueByType(strValue, fieldType);
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} catch (Exception e) { |
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if (fieldType == Types.INTEGER || |
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fieldType == Types.BIGINT ||
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fieldType == Types.FLOAT ||
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fieldType == Types.DECIMAL ||
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fieldType == Types.DOUBLE){
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//Habria que quejarse???
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try {
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return ValueFactory.createValueByType("0", fieldType); |
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} catch (ParseException e1) { |
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throw new BadFieldDriverException(getName(),null,String.valueOf(fieldType)); |
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} |
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}else{
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// OJO: Habria que revisar el resto de tipos
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// De momento lanzamos la excepcion
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throw new BadFieldDriverException(getName(),null,String.valueOf(fieldType)); |
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} |
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} |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldCount()
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*/
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public int getFieldCount() throws ReadDriverException { |
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return dbf.getFieldCount();
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldName(int)
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*/
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public String getFieldName(int fieldId) throws ReadDriverException { |
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return dbf.getFieldName(fieldId);
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getRowCount()
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*/
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public long getRowCount() throws ReadDriverException { |
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return dbf.getRecordCount();
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.FileDriver#fileAccepted(java.io.File)
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*/
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public boolean fileAccepted(File f) { |
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return f.getAbsolutePath().toUpperCase().endsWith("DBF"); |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldType(int)
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*/
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public int getFieldType(int i) throws ReadDriverException { |
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char fieldType = fieldTypes[i];
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if (fieldType == 'L') { |
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return Types.BOOLEAN; |
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} else if ((fieldType == 'F') || (fieldType == 'N')) { |
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if (dbf.getFieldDecimalLength(i)>0 || dbf.getFieldLength(i)>9) |
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return Types.DOUBLE; |
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else
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return Types.INTEGER; |
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} else if (fieldType == 'C') { |
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return Types.VARCHAR; |
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} else if (fieldType == 'D') { |
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return Types.DATE; |
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} else {
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throw new BadFieldDriverException(getName(),null,String.valueOf(fieldType)); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.DriverCommons#setDataSourceFactory(com.hardcode.gdbms.engine.data.DataSourceFactory)
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*/
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public void setDataSourceFactory(DataSourceFactory dsf) { |
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this.dsf = dsf;
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} |
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private void writeToTemp(DataWare dataWare, File file) throws WriteDriverException, ReadDriverException { |
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DbaseFileWriterNIO dbfWrite = null;
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DbaseFileHeaderNIO myHeader; |
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Value[] record;
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try {
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myHeader = DbaseFileHeaderNIO.createDbaseHeader(dataWare); |
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myHeader.setNumRecords((int) dataWare.getRowCount());
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dbfWrite = new DbaseFileWriterNIO(myHeader,
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(FileChannel) getWriteChannel(file.getPath()));
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record = new Value[dataWare.getFieldCount()];
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for (int j = 0; j < dataWare.getRowCount(); j++) { |
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for (int r = 0; r < dataWare.getFieldCount(); r++) { |
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record[r] = dataWare.getFieldValue(j, r); |
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} |
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dbfWrite.write(record); |
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} |
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dbfWrite.close(); |
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} catch (IOException e) { |
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throw new WriteDriverException(getName(),e); |
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} |
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} |
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/**
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* @throws ReadDriverException
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* @see com.hardcode.gdbms.engine.data.driver.FileDriver#writeFile(com.hardcode.gdbms.engine.data.file.FileDataWare,
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* java.io.File)
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*/
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public void writeFile(FileDataWare dataWare) |
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throws WriteDriverException, ReadDriverException {
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String temp = dsf.getTempFile();
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writeToTemp(dataWare, new File(temp)); |
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try {
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FileChannel fcout = dbf.getWriteChannel();
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FileChannel fcin = new FileInputStream(temp).getChannel(); |
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DriverUtilities.copy(fcin, fcout); |
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} catch (IOException e) { |
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throw new WriteDriverException(getName(),e); |
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} |
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} |
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/**
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* DOCUMENT ME!
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*
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* @param path DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*
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* @throws IOException DOCUMENT ME!
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*/
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private WritableByteChannel getWriteChannel(String path) |
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throws IOException { |
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WritableByteChannel channel;
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File f = new File(path); |
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if (!f.exists()) {
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System.out.println("Creando fichero " + f.getAbsolutePath()); |
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if (!f.createNewFile()) {
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throw new IOException("Cannot create file " + f); |
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} |
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} |
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RandomAccessFile raf = new RandomAccessFile(f, "rw"); |
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channel = raf.getChannel(); |
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return channel;
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} |
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/* (non-Javadoc)
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* @see com.hardcode.gdbms.engine.data.driver.FileDriver#createSource(java.lang.String, java.lang.String[], int[])
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*/
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public void createSource(String arg0, String[] arg1, int[] arg2) throws ReadDriverException { |
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DbaseFileHeaderNIO myHeader; |
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int[] lengths = new int[arg2.length]; |
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for (int i = 0; i < arg2.length; i++) { |
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lengths[i] = 100;
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} |
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try {
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myHeader = DbaseFileHeaderNIO.createDbaseHeader(arg1, arg2, lengths); |
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myHeader.setNumRecords(0);
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DbaseFileWriterNIO dbfWrite = new DbaseFileWriterNIO(myHeader,
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(FileChannel) getWriteChannel(arg0));
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dbfWrite = new DbaseFileWriterNIO(myHeader,
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(FileChannel) getWriteChannel(arg0));
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} catch (IOException e) { |
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throw new ReadDriverException(getName(),e); |
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} |
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} |
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public int getFieldWidth(int i) throws ReadDriverException { |
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return dbf.getFieldLength(i);
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} |
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public IWriter getWriter() {
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return this; |
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} |
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public void preProcess() throws StartWriterVisitorException { |
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dbfWriter.setCharset(getCharSet()); |
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dbfWriter.preProcess(); |
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} |
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public void process(IRowEdited row) throws ProcessWriterVisitorException { |
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dbfWriter.process(row); |
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} |
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public void postProcess() throws StopWriterVisitorException { |
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dbfWriter.postProcess(); |
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try {
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// original encoding
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short originalEncoding = dbf.getDbaseHeader().getLanguageID();
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// Dbf
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File dbfFile = fTemp;
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FileChannel fcinDbf = new FileInputStream(dbfFile).getChannel(); |
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FileChannel fcoutDbf = new FileOutputStream(file).getChannel(); |
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DriverUtilities.copy(fcinDbf, fcoutDbf); |
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// Borramos los temporales
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fTemp.delete(); |
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// Reload
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close(); |
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// Restauramos el byte de encoding
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RandomAccessFile fo = new RandomAccessFile(file, "rw"); |
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fo.seek(29);
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fo.writeByte(originalEncoding); |
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fo.close(); |
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open(file); |
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} catch (FileNotFoundException e) { |
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throw new StopWriterVisitorException(getName(),e); |
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} catch (IOException e) { |
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throw new StopWriterVisitorException(getName(),e); |
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} catch (CloseDriverException e) {
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throw new StopWriterVisitorException(getName(),e); |
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} catch (OpenDriverException e) {
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throw new StopWriterVisitorException(getName(),e); |
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} |
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} |
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public String getCapability(String capability) { |
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return dbfWriter.getCapability(capability);
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} |
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public void setCapabilities(Properties capabilities) { |
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dbfWriter.setCapabilities(capabilities); |
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} |
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public boolean canWriteAttribute(int sqlType) { |
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return dbfWriter.canWriteAttribute(sqlType);
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} |
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public void initialize(ITableDefinition tableDefinition) throws InitializeWriterException { |
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dbfWriter.initialize(tableDefinition); |
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} |
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public ITableDefinition getTableDefinition() throws ReadDriverException { |
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tableDef = new TableDefinition();
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int numFields;
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numFields = getFieldCount(); |
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FieldDescription[] fieldsDescrip = new FieldDescription[numFields]; |
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for (int i = 0; i < numFields; i++) { |
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fieldsDescrip[i] = new FieldDescription();
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int type = getFieldType(i);
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fieldsDescrip[i].setFieldType(type); |
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fieldsDescrip[i].setFieldName(getFieldName(i)); |
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fieldsDescrip[i].setFieldLength(getFieldWidth(i)); |
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if (NumberUtilities.isNumeric(type))
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{
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if (!NumberUtilities.isNumericInteger(type))
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// TODO: If there is a lost in precision, this should be changed.
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fieldsDescrip[i].setFieldDecimalCount(6);
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} |
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else
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fieldsDescrip[i].setFieldDecimalCount(0);
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// TODO: ?DEFAULTVALUE?
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// fieldsDescrip[i].setDefaultValue(get)
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} |
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tableDef.setFieldsDesc(fieldsDescrip); |
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return tableDef;
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// return dbfWriter.getTableDefinition();
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} |
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|
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public boolean canAlterTable() { |
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return true; |
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} |
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|
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public boolean alterTable() { |
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return true; |
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} |
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|
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public boolean canSaveEdits() { |
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if (file.canWrite()) return true; |
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return false; |
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|
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} |
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public boolean isWriteAll() { |
| 488 |
// TODO: DEVOLVER FALSE SI NO HA HABIDO CAMBIOS EN LOS CAMPOS.
|
| 489 |
return true; |
| 490 |
} |
| 491 |
public void setFieldValue(int rowIndex, int fieldId, Object obj) |
| 492 |
throws IOException { |
| 493 |
dbf.setFieldValue(rowIndex,fieldId,obj); |
| 494 |
} |
| 495 |
} |