net.sf.farrago.fennel.tuple
Class FennelTupleResultSet

java.lang.Object
  org.eigenbase.jdbc4.Unwrappable
      org.eigenbase.util14.AbstractResultSet
          net.sf.farrago.fennel.tuple.FennelTupleResultSet

All Implemented Interfaces:

ResultSet

public abstract class FennelTupleResultSet
extends AbstractResultSet

FennelTupleResultSet provides an abstract java.sql.ResultSet based on tuples. This object uses the Java Tuple Library to interpret tuple data as presented in fennel tuple format and presents java objects and/or primitives as requested by the application. TODO: FennelTupleResultSet minimizes object creation while remapping tuple data to java objects in order to provide higher performance. This class is JDK 1.4 compatible.

Since:

Jan 8, 2006

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/fennel/tuple/FennelTupleResultSet.java#17 $

Author:

angel

Field Summary

protected FennelTupleAccessor	accessor
protected FennelTupleData	data
private static TimeZone	defaultZone The default timezone for this Java VM.
protected FennelTupleDescriptor	desc
static String	ERRMSG_NO_TUPLE
protected ResultSetMetaData	metaData
protected int	tupleAlignment
protected int	tupleAlignmentMask
protected boolean	tupleComputed

Fields inherited from class org.eigenbase.util14.AbstractResultSet

fetchSize, maxRows, wasNull

Fields inherited from interface java.sql.ResultSet

CLOSE_CURSORS_AT_COMMIT, CONCUR_READ_ONLY, CONCUR_UPDATABLE, FETCH_FORWARD, FETCH_REVERSE, FETCH_UNKNOWN, HOLD_CURSORS_OVER_COMMIT, TYPE_FORWARD_ONLY, TYPE_SCROLL_INSENSITIVE, TYPE_SCROLL_SENSITIVE

Constructor Summary

FennelTupleResultSet(FennelTupleDescriptor desc, ResultSetMetaData metaData)

FennelTupleResultSet(FennelTupleDescriptor desc, ResultSetMetaData metaData, int tupleAlignment)

Method Summary

protected void	alignBufferPosition(ByteBuffer buf) Adjusts ByteBuffer position according to the tuple alignment mask.
protected boolean	computeTuple() compute the tuple accessors
ResultSetMetaData	getMetaData() The number, types and properties of a ResultSet's columns are provided by the getMetaData method.
protected static long	getMillis(FennelTupleDatum d)
protected static long	getMillis(FennelTupleDatum d, boolean shiftForTimeZone)
protected Object	getRaw(int columnIndex) Returns the raw object representing this column
static Object	getRawColumnData(int columnIndex, ResultSetMetaData metaData, FennelTupleData tupleData)

Methods inherited from class org.eigenbase.util14.AbstractResultSet

absolute, afterLast, beforeFirst, cancelRowUpdates, clearWarnings, close, deleteRow, findColumn, first, getArray, getArray, getAsciiStream, getAsciiStream, getBigDecimal, getBigDecimal, getBigDecimal, getBigDecimal, getBinaryStream, getBinaryStream, getBlob, getBlob, getBoolean, getBoolean, getByte, getByte, getBytes, getBytes, getCharacterStream, getCharacterStream, getClob, getClob, getConcurrency, getCursorName, getDate, getDate, getDate, getDate, getDouble, getDouble, getFetchDirection, getFetchSize, getFloat, getFloat, getHoldability, getInt, getInt, getLong, getLong, getNCharacterStream, getNCharacterStream, getNClob, getNClob, getNString, getNString, getObject, getObject, getObject, getObject, getRaw, getRef, getRef, getRow, getRowId, getRowId, getShort, getShort, getSQLXML, getSQLXML, getStatement, getString, getString, getTime, getTime, getTime, getTime, getTimestamp, getTimestamp, getTimestamp, getTimestamp, getType, getUnicodeStream, getUnicodeStream, getURL, getURL, getWarnings, insertRow, isAfterLast, isBeforeFirst, isClosed, isFirst, isLast, last, moveToCurrentRow, moveToInsertRow, newConversionError, newConversionError, newDirectionError, newFetchError, newUpdatabilityError, previous, refreshRow, relative, rowDeleted, rowInserted, rowUpdated, setFetchDirection, setFetchSize, setMaxRows, updateArray, updateArray, updateAsciiStream, updateAsciiStream, updateAsciiStream, updateAsciiStream, updateAsciiStream, updateAsciiStream, updateBigDecimal, updateBigDecimal, updateBinaryStream, updateBinaryStream, updateBinaryStream, updateBinaryStream, updateBinaryStream, updateBinaryStream, updateBlob, updateBlob, updateBlob, updateBlob, updateBlob, updateBlob, updateBoolean, updateBoolean, updateByte, updateByte, updateBytes, updateBytes, updateCharacterStream, updateCharacterStream, updateCharacterStream, updateCharacterStream, updateCharacterStream, updateCharacterStream, updateClob, updateClob, updateClob, updateClob, updateClob, updateClob, updateDate, updateDate, updateDouble, updateDouble, updateFloat, updateFloat, updateInt, updateInt, updateLong, updateLong, updateNCharacterStream, updateNCharacterStream, updateNCharacterStream, updateNCharacterStream, updateNClob, updateNClob, updateNClob, updateNClob, updateNClob, updateNClob, updateNString, updateNString, updateNull, updateNull, updateObject, updateObject, updateObject, updateObject, updateRef, updateRef, updateRow, updateRowId, updateRowId, updateShort, updateShort, updateSQLXML, updateSQLXML, updateString, updateString, updateTime, updateTime, updateTimestamp, updateTimestamp, wasNull

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.sql.ResultSet

next

Field Detail

ERRMSG_NO_TUPLE

public static final String ERRMSG_NO_TUPLE

See Also:

Constant Field Values

defaultZone

private static final TimeZone defaultZone

The default timezone for this Java VM.

metaData

protected ResultSetMetaData metaData

desc

protected FennelTupleDescriptor desc

accessor

protected FennelTupleAccessor accessor

data

protected FennelTupleData data

tupleComputed

protected boolean tupleComputed

tupleAlignment

protected final int tupleAlignment

tupleAlignmentMask

protected final int tupleAlignmentMask

Constructor Detail

FennelTupleResultSet

public FennelTupleResultSet(FennelTupleDescriptor desc,
                            ResultSetMetaData metaData,
                            int tupleAlignment)

FennelTupleResultSet

public FennelTupleResultSet(FennelTupleDescriptor desc,
                            ResultSetMetaData metaData)

Method Detail

computeTuple

protected boolean computeTuple()

compute the tuple accessors

alignBufferPosition

protected void alignBufferPosition(ByteBuffer buf)

Adjusts ByteBuffer position according to the tuple alignment mask. Used when "slicing" tuples from a multiple-tuple buffer.

Parameters:

buf -

getMillis

protected static long getMillis(FennelTupleDatum d,
                                boolean shiftForTimeZone)

getMillis

protected static long getMillis(FennelTupleDatum d)

getRaw

protected Object getRaw(int columnIndex)
                 throws SQLException

Returns the raw object representing this column

Specified by:

getRaw in class AbstractResultSet

Parameters:

columnIndex - column ordinal

Returns:

raw object for a column

Throws:

SQLException

getRawColumnData

public static Object getRawColumnData(int columnIndex,
                                      ResultSetMetaData metaData,
                                      FennelTupleData tupleData)
                               throws SQLException

Parameters:

columnIndex - column ordinal

metaData - metadata for all columns

tupleData - tuple data representing a row of columns

Returns:

column data corresponding to a specified column ordinal; null if the data is null

Throws:

SQLException

getMetaData

public ResultSetMetaData getMetaData()
                              throws SQLException

The number, types and properties of a ResultSet's columns are provided by the getMetaData method.

Returns:

the description of a ResultSet's columns

Throws:

SQLException