svn-gvsig-desktop / trunk / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / driver / dbf_Fernando / DBFDriver.java @ 4851
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package com.hardcode.gdbms.driver.dbf_Fernando; |
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import com.hardcode.driverManager.Driver; |
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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.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 java.io.BufferedOutputStream; |
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import java.io.DataOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.nio.channels.FileChannel; |
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import java.sql.Types; |
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import java.text.DateFormat; |
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import java.text.SimpleDateFormat; |
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import java.util.Calendar; |
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import java.util.Date; |
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import java.util.HashMap; |
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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 Driver, FileDriver { |
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private File file; |
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private DbaseFile dbf = new DbaseFile(); |
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private char[] fieldTypes; |
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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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this.file = file;
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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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/* memory = new Value[getRowCount()][getFieldCount()];
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for (int i = 0; i < getRowCount(); i++){
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for (int j = 0; j < getFieldCount(); j++){
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try {
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memory[i][j] = getFieldValueOff(i,j);
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} catch (IOException e) {
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e.printStackTrace();
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} catch (SemanticException e) {
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e.printStackTrace();
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}
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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.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 fieldType = fieldTypes[fieldId];
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if (fieldType == 'L') { |
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return ValueFactory.createValue(dbf.getBooleanFieldValue(
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(int) rowIndex, fieldId));
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/* }else if (fieldType == 'N'){
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String strValue = dbf.getStringFieldValue(rowIndex, fieldId);
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long value = Long.parseLong(strValue);
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if ((value > Integer.MIN_VALUE) && (value < Integer.MAX_VALUE)){
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return new IntValue((int) value);
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}else{
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return new LongValue(value);
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}
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*/
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} else if ((fieldType == 'F') || (fieldType == 'N')) { |
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String strValue = dbf.getStringFieldValue((int) rowIndex, fieldId) |
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.trim(); |
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if (strValue.length() == 0) { |
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return null; |
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} |
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double value = Double.parseDouble(strValue); |
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return ValueFactory.createValue(value);
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} else if (fieldType == 'C') { |
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return ValueFactory.createValue(dbf.getStringFieldValue(
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(int) rowIndex, fieldId).trim());
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} else if (fieldType == 'D') { |
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String date = dbf.getStringFieldValue((int) rowIndex, fieldId).trim(); |
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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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Calendar c = Calendar.getInstance(); |
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c.set(Integer.parseInt(year), Integer.parseInt(month), |
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Integer.parseInt(day), 0, 0, 0); |
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c.set(Calendar.MILLISECOND, 0); |
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return ValueFactory.createValue(c.getTime());
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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.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#getDriverProperties()
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*/
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public HashMap getDriverProperties() { |
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// TODO Auto-generated method stub
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return null; |
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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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// TODO Auto-generated method stub
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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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try {
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File temp = File.createTempFile("gdbms", ".dbf"); |
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FileOutputStream fos = new FileOutputStream(temp); |
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DataOutputStream dos = new DataOutputStream(fos); |
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//version
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dos.writeByte(0x33);
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//date
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Date d = new Date(); |
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SimpleDateFormat sdf = new SimpleDateFormat("yy"); |
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byte year = Byte.parseByte(sdf.format(d)); |
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sdf = new SimpleDateFormat("MM"); |
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byte month = Byte.parseByte(sdf.format(d)); |
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sdf = new SimpleDateFormat("dd"); |
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byte day = Byte.parseByte(sdf.format(d)); |
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dos.writeByte(year); |
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dos.writeByte(month); |
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dos.writeByte(day); |
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//record count
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int rowCount = (int) dataWare.getRowCount(); |
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dos.write(rowCount); |
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//header length
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dos.write(296 + dataWare.getFieldCount() * 32); |
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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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public void createSource(String path, String[] fieldNames, int[] fieldTypes) throws IOException { |
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// TODO Auto-generated method stub
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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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} |