org.apache.calcite.avatica.util

Class PositionedCursor<T>

java.lang.Object

org.apache.calcite.avatica.util.AbstractCursor

org.apache.calcite.avatica.util.PositionedCursor<T>

Type Parameters:

T - Element type

All Implemented Interfaces:

Closeable, AutoCloseable, Cursor

Direct Known Subclasses:

IteratorCursor

public abstract class PositionedCursor<T>
extends AbstractCursor

Abstract implementation of Cursor that caches its current row.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	PositionedCursor.ArrayGetter Implementation of AbstractCursor.Getter that reads from records that are arrays.
protected class	PositionedCursor.FieldGetter Implementation of AbstractCursor.Getter that reads fields via reflection.
protected class	PositionedCursor.ListGetter Implementation of AbstractCursor.Getter that reads items from a list.
protected class	PositionedCursor.MapGetter<K> Implementation of AbstractCursor.Getter that reads entries from a Map.
protected class	PositionedCursor.ObjectGetter Implementation of AbstractCursor.Getter for records that consist of a single field.

Nested classes/interfaces inherited from class org.apache.calcite.avatica.util.AbstractCursor

AbstractCursor.AbstractGetter, AbstractCursor.Getter

Nested classes/interfaces inherited from interface org.apache.calcite.avatica.util.Cursor

Cursor.Accessor

Field Summary

Fields inherited from class org.apache.calcite.avatica.util.AbstractCursor

wasNull

Constructor Summary

Constructors

Constructor and Description
PositionedCursor()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract T	current() Returns the current row.

Methods inherited from class org.apache.calcite.avatica.util.AbstractCursor

createAccessor, createAccessors, createGetter, next, wasNull

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.avatica.util.Cursor

close

Constructor Detail

PositionedCursor

public PositionedCursor()

Method Detail

current

protected abstract T current()

Returns the current row.

Returns:

current row

Throws:

NoSuchElementException - if the iteration has no more elements