Quadcap Embeddable Database

com.quadcap.sql.ViewCursor Class Reference

Inheritance diagram for com.quadcap.sql.ViewCursor:

List of all members.

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Detailed Description

This cursor performs the name mapping associated with the (optional) column list of the CREATE VIEW statement.

Author:

Stan Bailes

Definition at line 60 of file ViewCursor.java.

Public Member Functions
	ViewCursor (Session session, View view, Cursor cursor, Vector names) throws SQLException
long	size () throws SQLException
	If the underlying implementation knows, or can compute cheaply, the actual size of the ResultSet, it should return a non-negative number here.
Row	getRow () throws SQLException
	Derived class implements this function to return the current cursor row.
void	updateRow (Row row) throws SQLException
	Replace the current cursor row with the specified row.
void	insertRow (Row row) throws SQLException
	Handle insert.
void	deleteRow () throws SQLException
	Delete the current cursor row.
void	beforeFirst () throws SQLException
	Position the cursor before the first row.
void	afterLast () throws SQLException
	Position the cursor after the last row.
boolean	absolute (int row) throws SQLException
	Position the cursor to the specified absolute row.
boolean	next () throws SQLException
	Advance the cursor and return true if we advanced to a valid row.
boolean	isWritable (int column) throws SQLException
	Return true if the specified column is writable.
int	getColumnCount () throws SQLException
	Return the number of columns in this tuple.
void	close () throws SQLException
	Close the cursor and free up any resources (including closing the cursor's transaction if that is feasible) used by the cursor.
Package Attributes
Cursor	cursor
View	view

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Constructor & Destructor Documentation

com.quadcap.sql.ViewCursor.ViewCursor (  Session  session, View  view, Cursor  cursor, Vector  names )  throws SQLException

Definition at line 64 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, com.quadcap.sql.Tuple.getColumn(), com.quadcap.sql.Tuple.getColumnCount(), com.quadcap.sql.TupleImpl.getName(), com.quadcap.sql.Column.getType(), com.quadcap.sql.TupleImpl.resolveColumns(), and com.quadcap.sql.ViewCursor.view.

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Member Function Documentation

boolean com.quadcap.sql.ViewCursor.absolute (  int  row  )  throws SQLException

Position the cursor to the specified absolute row. The first row is row '1', and the last row is '-1', as in JDBC. Reimplemented from com.quadcap.sql.CursorImpl. Definition at line 124 of file ViewCursor.java. References com.quadcap.sql.Cursor.absolute(), com.quadcap.sql.ViewCursor.absolute(), and com.quadcap.sql.ViewCursor.cursor. Referenced by com.quadcap.sql.ViewCursor.absolute().

void com.quadcap.sql.ViewCursor.afterLast (   )  throws SQLException [virtual]

Position the cursor after the last row. Implements com.quadcap.sql.CursorImpl. Definition at line 120 of file ViewCursor.java. References com.quadcap.sql.Cursor.afterLast(), and com.quadcap.sql.ViewCursor.cursor.

void com.quadcap.sql.ViewCursor.beforeFirst (   )  throws SQLException [virtual]

Position the cursor before the first row. Implements com.quadcap.sql.CursorImpl. Definition at line 116 of file ViewCursor.java. References com.quadcap.sql.Cursor.beforeFirst(), and com.quadcap.sql.ViewCursor.cursor.

void com.quadcap.sql.ViewCursor.close (   )  throws SQLException [virtual]

Close the cursor and free up any resources (including closing the cursor's transaction if that is feasible) used by the cursor. Exceptions: SQLException  may be thrown Implements com.quadcap.sql.CursorImpl. Definition at line 139 of file ViewCursor.java. References com.quadcap.sql.Cursor.close(), and com.quadcap.sql.ViewCursor.cursor.

void com.quadcap.sql.ViewCursor.deleteRow (   )  throws SQLException [virtual]

Delete the current cursor row. Implements com.quadcap.sql.CursorImpl. Definition at line 112 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, and com.quadcap.sql.Cursor.deleteRow().

int com.quadcap.sql.ViewCursor.getColumnCount (   )  throws SQLException

Return the number of columns in this tuple. Reimplemented from com.quadcap.sql.TupleImpl. Definition at line 136 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, and com.quadcap.sql.Tuple.getColumnCount().

Row com.quadcap.sql.ViewCursor.getRow (   )  throws SQLException [virtual]

Derived class implements this function to return the current cursor row. Implementation required. Implements com.quadcap.sql.CursorImpl. Definition at line 98 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, and com.quadcap.sql.Cursor.getRow().

void com.quadcap.sql.ViewCursor.insertRow (  Row  row  )  throws SQLException

Handle insert. Reimplemented from com.quadcap.sql.CursorImpl. Definition at line 107 of file ViewCursor.java. References com.quadcap.sql.View.checkRow(), com.quadcap.sql.ViewCursor.cursor, com.quadcap.sql.Cursor.insertRow(), com.quadcap.sql.ViewCursor.insertRow(), and com.quadcap.sql.ViewCursor.view. Referenced by com.quadcap.sql.ViewCursor.insertRow().

boolean com.quadcap.sql.ViewCursor.isWritable (  int  column  )  throws SQLException [virtual]

Return true if the specified column is writable. Parameters: column  the (one-based) column number Exceptions: SQLException  may be thrown Implements com.quadcap.sql.CursorImpl. Definition at line 132 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, com.quadcap.sql.Cursor.isWritable(), and com.quadcap.sql.ViewCursor.isWritable(). Referenced by com.quadcap.sql.ViewCursor.isWritable().

boolean com.quadcap.sql.ViewCursor.next (   )  throws SQLException [virtual]

Advance the cursor and return true if we advanced to a valid row. Implements com.quadcap.sql.CursorImpl. Definition at line 128 of file ViewCursor.java. References com.quadcap.sql.ViewCursor.cursor, and com.quadcap.sql.Cursor.next().

long com.quadcap.sql.ViewCursor.size (   )  throws SQLException

If the underlying implementation knows, or can compute cheaply, the actual size of the ResultSet, it should return a non-negative number here. If the size is unknown and it would be expensive to compute it (i.e., on the order of while next()) size++), then the implementation should return -1 Implements com.quadcap.sql.Cursor. Definition at line 96 of file ViewCursor.java.

void com.quadcap.sql.ViewCursor.updateRow (  Row  row  )  throws SQLException [virtual]

Replace the current cursor row with the specified row. Implements com.quadcap.sql.CursorImpl. Definition at line 102 of file ViewCursor.java. References com.quadcap.sql.View.checkRow(), com.quadcap.sql.ViewCursor.cursor, com.quadcap.sql.Cursor.updateRow(), com.quadcap.sql.ViewCursor.updateRow(), and com.quadcap.sql.ViewCursor.view. Referenced by com.quadcap.sql.ViewCursor.updateRow().

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Member Data Documentation

Cursor com.quadcap.sql.ViewCursor.cursor [package]

Definition at line 61 of file ViewCursor.java. Referenced by com.quadcap.sql.ViewCursor.absolute(), com.quadcap.sql.ViewCursor.afterLast(), com.quadcap.sql.ViewCursor.beforeFirst(), com.quadcap.sql.ViewCursor.close(), com.quadcap.sql.ViewCursor.deleteRow(), com.quadcap.sql.ViewCursor.getColumnCount(), com.quadcap.sql.ViewCursor.getRow(), com.quadcap.sql.ViewCursor.insertRow(), com.quadcap.sql.ViewCursor.isWritable(), com.quadcap.sql.ViewCursor.next(), com.quadcap.sql.ViewCursor.updateRow(), and com.quadcap.sql.ViewCursor.ViewCursor().

View com.quadcap.sql.ViewCursor.view [package]

Definition at line 62 of file ViewCursor.java. Referenced by com.quadcap.sql.ViewCursor.insertRow(), com.quadcap.sql.ViewCursor.updateRow(), and com.quadcap.sql.ViewCursor.ViewCursor().