Package org.apache.cassandra.db.transform

Class BasePartitions<R extends BaseRowIterator<?>,I extends BasePartitionIterator<? extends BaseRowIterator<?>>>

java.lang.Object

org.apache.cassandra.db.transform.BasePartitions<R,I>

All Implemented Interfaces:

java.lang.AutoCloseable, java.util.Iterator<R>, BasePartitionIterator<R>, CloseableIterator<R>

Direct Known Subclasses:

FilteredPartitions

public abstract class BasePartitions<R extends BaseRowIterator<?>,I extends BasePartitionIterator<? extends BaseRowIterator<?>>>
extends java.lang.Object
implements BasePartitionIterator<R>

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.cassandra.db.transform.Stack.MoreContentsHolder[]	EMPTY_MORE_CONTENTS_HOLDERS
static Transformation[]	EMPTY_TRANSFORMATIONS

Constructor Summary

Constructors

Constructor	Description
BasePartitions(I input)

Method Summary

Modifier and Type	Method	Description
protected BaseRowIterator<?>	applyOne(BaseRowIterator<?> value, Transformation transformation)	apply the relevant method from the transformation to the value.
void	close()
protected boolean	hasMoreContents()
boolean	hasNext()
O	next()
protected java.lang.Throwable	runOnClose(int length)	run the corresponding runOnClose method for the first length transformations.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.db.partitions.BasePartitionIterator

close

Methods inherited from interface java.util.Iterator

forEachRemaining, next, remove

Field Detail

EMPTY_TRANSFORMATIONS

public static final Transformation[] EMPTY_TRANSFORMATIONS

EMPTY_MORE_CONTENTS_HOLDERS

public static final org.apache.cassandra.db.transform.Stack.MoreContentsHolder[] EMPTY_MORE_CONTENTS_HOLDERS

Constructor Detail

BasePartitions

public BasePartitions(I input)

Method Detail

applyOne

protected BaseRowIterator<?> applyOne(BaseRowIterator<?> value,
                                      Transformation transformation)

apply the relevant method from the transformation to the value. used in hasMoreContents to apply the functions that follow the MoreContents

runOnClose

protected java.lang.Throwable runOnClose(int length)

run the corresponding runOnClose method for the first length transformations. used in hasMoreContents to close the methods preceding the MoreContents

hasNext

public final boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<R extends BaseRowIterator<?>>

close

public final void close()

Specified by:

close in interface java.lang.AutoCloseable

next

public final O next()

Specified by:

next in interface java.util.Iterator<V>

hasMoreContents

protected final boolean hasMoreContents()