Package org.apache.calcite.avatica.util

Interface Cursor

All Superinterfaces:

java.lang.AutoCloseable

All Known Implementing Classes:

AbstractCursor, ArrayIteratorCursor, IteratorCursor, ListIteratorCursor, MapIteratorCursor, PositionedCursor, RecordIteratorCursor

public interface Cursor
extends java.lang.AutoCloseable

Interface to an iteration that is similar to, and can easily support, a JDBC ResultSet, but is simpler to implement.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	Cursor.Accessor	Accessor of a column value.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this cursor and releases resources.
java.util.List<Cursor.Accessor>	createAccessors(java.util.List<ColumnMetaData> types, java.util.Calendar localCalendar, ArrayImpl.Factory factory)	Creates a list of accessors, one per column.
boolean	next()	Moves to the next row.
boolean	wasNull()	Returns whether the last value returned was null.

Method Detail

createAccessors

java.util.List<Cursor.Accessor> createAccessors(java.util.List<ColumnMetaData> types,
                                                java.util.Calendar localCalendar,
                                                ArrayImpl.Factory factory)

Creates a list of accessors, one per column.

Parameters:

types - List of column types, per Types.

localCalendar - Calendar in local time zone

factory - Factory that creates sub-ResultSets when needed

Returns:

List of column accessors

next

boolean next()
      throws java.sql.SQLException

Moves to the next row.

Returns:

Whether moved

Throws:

java.sql.SQLException - on database error

close

void close()

Closes this cursor and releases resources.

Specified by:

close in interface java.lang.AutoCloseable

wasNull

boolean wasNull()
         throws java.sql.SQLException

Returns whether the last value returned was null.

Throws:

java.sql.SQLException - on database error