BaseJoinedRowIterator (AxionDB 1.0-M3-dev API)

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org.axiondb.engine.rowiterators
Class BaseJoinedRowIterator

java.lang.Object
  org.axiondb.engine.rowiterators.BaseRowIterator
      org.axiondb.engine.rowiterators.BaseJoinedRowIterator

All Implemented Interfaces:: JoinedRowIterator, RowIterator

Direct Known Subclasses:: IndexJoinedRowIterator, NestedLoopJoinedRowIterator

public abstract class BaseJoinedRowIterator
extends BaseRowIterator
implements JoinedRowIterator

Version:: $Revision: 1.23 $ $Date: 2004/09/09 23:47:43 $

Constructor Summary
`BaseJoinedRowIterator()`

Method Summary
`protected boolean`	`acceptable(int rowindex, Row row)`
`protected void`	`addIterator(RowIterator iter)`
`protected boolean`	`allIteratorsAreEmpty()`
`protected boolean`	`anyIteratorIsEmpty()`
`protected void`	`clearNextRow()`
`protected void`	`clearPreviousRow()`
`Row`	`current()` Returns the last `Row`returned by me (by `next()`,`previous()`, `first()`,`last()`, etc.).
`int`	`currentIndex()` Returns the index of the `current()`row, if any.
`Row`	`first()` Returns the first `Row`in the list, positioning the cursor to just before the first `Row`in the list.
`protected RowIterator`	`getIterator(int i)`
`protected int`	`getIteratorCount()`
`protected abstract String`	`getShortName()`
`boolean`	`hasCurrent()` Returns `true` if I have a current `Row`.
`boolean`	`hasNext()` Returns `true` if I have more `Row`s when traversing the list in the forward direction.
`boolean`	`hasPrevious()` Returns `true` if I have more `Row`s when traversing the list in the reverse direction.
`protected boolean`	`isLeftJoin()`
`protected boolean`	`isNextRowSet()`
`protected boolean`	`isPreviousRowSet()`
`protected boolean`	`isRightJoin()`
`Row`	`last()` Returns the last `Row`in the list, positioning the cursor to just after the last `Row`in the list.
`Row`	`next()` Returns the next `Row`in the list, or throws `NoSuchElementException`if no next `Row` exists.
`int`	`nextIndex()` Returns the index of the `next()`row, if any, or the number of elements is the iterator if we've reached the end.
`Row`	`previous()` Returns the previous `Row`in the list, or throws `NoSuchElementException`if no next `Row` exists.
`int`	`previousIndex()` Returns the index of the `previous()`row, if any, or -1 if we're add the beginning of the list.
`void`	`reset()` Re-initialize this `RowIterator` to its initial state (positioned just before the first `Row`in the list).
`protected abstract void`	`set(int rowIndex, Row row)`
`void`	`set(Row row)` Set the `Row`at the current position in my underlying collection, or throw `UnsupportedOperationException`.
`void`	`setJoinCondition(RowDecorator decorator, Selectable condition)`
`void`	`setJoinType(int type)`
`protected abstract boolean`	`setNextRow()`
`protected void`	`setNextRow(Row row)`
`protected abstract boolean`	`setPreviousRow()`
`protected void`	`setPreviousRow(Row row)`
`String`	`toString()`

Methods inherited from class org.axiondb.engine.rowiterators.BaseRowIterator

add, isEmpty, peekNext, peekPrevious, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.JoinedRowIterator

addRowIterator

Methods inherited from interface org.axiondb.RowIterator

add, isEmpty, peekNext, peekPrevious, remove

Constructor Detail

BaseJoinedRowIterator

public BaseJoinedRowIterator()

Method Detail

setJoinCondition

public void setJoinCondition(RowDecorator decorator,
                             Selectable condition)

Specified by:: setJoinCondition in interface JoinedRowIterator

setJoinType

public void setJoinType(int type)

Specified by:: setJoinType in interface JoinedRowIterator