xdev.db

Class PrefetchedResult

java.lang.Object

xdev.db.Result

xdev.db.PrefetchedResult

All Implemented Interfaces:

AutoCloseable

public class PrefetchedResult
extends Result

Constructor Summary

Constructors

Constructor and Description
PrefetchedResult(Result result) Constructs a PrefetchedResult that is initialized with result.

Method Summary

Modifier and Type	Method and Description
void	close() Closes this Result and releases all used resources.
int	getColumnCount() Returns the number of columns.
ColumnMetaData	getMetadata(int col) Returns the cached ColumnMetadata for the column with index col.
Object	getObject(int col) Gets the value of the designated column in the current row of this Result object as an Object.
int	getRowCount()
boolean	next()
void	rewind()
int	skip(int count) Skips over the specified count of rows.

Methods inherited from class xdev.db.Result

dump, dump, getBoolean, getBoolean, getBoolean, getBoolean, getByte, getByte, getByte, getByte, getColumnIndex, getDataSource, getDouble, getDouble, getDouble, getDouble, getFloat, getFloat, getFloat, getFloat, getInt, getInt, getInt, getInt, getLong, getLong, getLong, getLong, getMaxRowCount, getObject, getQueryInfo, getShort, getShort, getShort, getShort, getString, getString, getString, getString, setDataSource, setMaxRowCount, setQueryInfo

Methods inherited from class java.lang.Object

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

Constructor Detail

PrefetchedResult

public PrefetchedResult(Result result)
                 throws DBException

Constructs a PrefetchedResult that is initialized with result.

Parameters:

result - a Result that include the data for this PrefetchedResult

Throws:

DBException

Method Detail

getColumnCount

public int getColumnCount()

Returns the number of columns.

Specified by:

getColumnCount in class Result

Returns:

the number of columns as int value.

getMetadata

public ColumnMetaData getMetadata(int col)

Returns the cached ColumnMetadata for the column with index col.

Note that col starts with 0 for the first column.

Specified by:

getMetadata in class Result

Parameters:

col - the index of the column whose ColumnMetadata shall be returned, starting at 0

Returns:

the cached ColumnMetadata of the column with index col

next

public boolean next()
             throws DBException

Specified by:

next in class Result

Returns:

true if there is another row to be returned, otherwise false.

Throws:

DBException - if any error occurred.

getObject

public Object getObject(int col)
                 throws DBException

Gets the value of the designated column in the current row of this Result object as an Object.

Specified by:

getObject in class Result

Parameters:

col - the index of the column

Returns:

a java.lang.Object holding the column value

Throws:

DBException - if the columnIndex is not valid; if a database access error occurs.

skip

public int skip(int count)
         throws DBException

Skips over the specified count of rows.

The skip method may, for a variety of reasons, end up skipping over some smaller number of rows, possibly 0. This may be caused by reaching the end of the result.

Specified by:

skip in class Result

Parameters:

count - the number of rows to skip

Returns:

the actual number of rows skipped

Throws:

DBException - if any error occured

rewind

public void rewind()

Since:

3.2

getRowCount

public int getRowCount()

Returns:

the number of rows in this result

Since:

4.0

close

public void close()
           throws DBException

Closes this Result and releases all used resources.

Specified by:

close in interface AutoCloseable

Specified by:

close in class Result

Throws:

DBException - if a database access error occurs.