/** @throws ReadDriverException TODO */
public void order() throws ReadDriverException {
int rowCount = (int) dataSource.getRowCount();
columnCache = new Value[rowCount][fieldIndexes.length];
for (int field = 0; field < fieldIndexes.length; field++) {
for (int i = 0; i < rowCount; i++) {
columnCache[i][field] = dataSource.getFieldValue(i, fieldIndexes[field]);
}
}
TreeSet set = new TreeSet(new SortComparator());
for (int i = 0; i < dataSource.getRowCount(); i++) {
set.add(new Integer(i));
}
orderIndexes = new long[(int) dataSource.getRowCount()];
int index = 0;
Iterator it = set.iterator();
while (it.hasNext()) {
Integer integer = (Integer) it.next();
orderIndexes[index] = integer.intValue();
index++;
}
}
/**
* DOCUMENT ME!
*
* @param ret
* @param fieldNames
* @param types
* @throws ReadDriverException TODO
*/
public OrderedDataSource(OperationDataSource ret, String[] fieldNames, int[] types)
throws ReadDriverException {
this.dataSource = ret;
fieldIndexes = new int[fieldNames.length];
for (int i = 0; i < fieldNames.length; i++) {
fieldIndexes[i] = dataSource.getFieldIndexByName(fieldNames[i]);
}
orders = new int[types.length];
for (int i = 0; i < types.length; i++) {
orders[i] = (types[i] == SelectAdapter.ORDER_ASC) ? 1 : -1;
}
}
/** @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldType(int) */
public int getFieldType(int i) throws ReadDriverException {
return dataSource.getFieldType(i);
}
/** @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getRowCount() */
public long getRowCount() throws ReadDriverException {
return dataSource.getRowCount();
}
/** @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldName(int) */
public String getFieldName(int fieldId) throws ReadDriverException {
return dataSource.getFieldName(fieldId);
}
/** @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldCount() */
public int getFieldCount() throws ReadDriverException {
return dataSource.getFieldCount();
}
/** @see com.hardcode.gdbms.engine.data.driver.ReadAccess#getFieldValue(long, int) */
public Value getFieldValue(long rowIndex, int fieldId) throws ReadDriverException {
return dataSource.getFieldValue(orderIndexes[(int) rowIndex], fieldId);
}
/** @see com.hardcode.gdbms.engine.data.DataSource#getFieldIndexByName(java.lang.String) */
public int getFieldIndexByName(String fieldName) throws ReadDriverException {
return dataSource.getFieldIndexByName(fieldName);
}
/** @see com.hardcode.gdbms.engine.data.DataSource#getMemento() */
public Memento getMemento() throws MementoException {
return new OperationLayerMemento(getName(), new Memento[] {dataSource.getMemento()}, getSQL());
}
/** @see com.hardcode.gdbms.engine.data.DataSource#stop() */
public void stop() throws ReadDriverException {
dataSource.stop();
}
