svn-gvsig-desktop / tags / v1_1_Build_1012 / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / driver / dbf / DBFDriver.java @ 12987
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package com.hardcode.gdbms.driver.dbf; |
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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.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.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 com.hardcode.gdbms.driver.DriverUtilities; |
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import com.hardcode.gdbms.engine.data.DataSourceFactory; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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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.fmap.drivers.dbf.DbaseFile; |
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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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/**
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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 implements FileDriver { |
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//private File file;
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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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/**
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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 IOException { |
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dbf.open(file); |
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try {
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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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} catch (DriverException e) {
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throw new IOException(e.getMessage()); |
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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 IOException { |
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dbf.close(); |
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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 DriverException {
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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 DriverException(e1); |
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} |
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// System.out.println(rowIndex + " data=" + date);
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if (date.length() == 0) { |
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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 DriverException("Bad Date Format"); |
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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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} catch (UnsupportedEncodingException e1) { |
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e1.printStackTrace(); |
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throw new DriverException(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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// Habria que quejarse???
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return ValueFactory.createValue(0); |
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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 DriverException("Bad Field Value: '" + strValue+"' (rowIndes: "+rowIndex + " fielId: "+ fieldId +" fieldType: " + 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 DriverException { |
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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 DriverException { |
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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 DriverException { |
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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 DriverException { |
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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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return Types.DOUBLE; |
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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 DriverException("Unknown field type"); |
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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 DriverException { |
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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 DriverException(e); |
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} |
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} |
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/**
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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 DriverException {
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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 DriverException(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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public void createSource(String arg0, String[] arg1, int[] arg2) throws IOException { |
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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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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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} |
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public int getFieldWidth(int i) throws DriverException { |
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return dbf.getFieldLength(i);
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} |
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} |