Package org.apache.cassandra.index.sasi.utils

Class OnDiskIndexIterator

java.lang.Object

org.apache.cassandra.utils.AbstractGuavaIterator<T>

org.apache.cassandra.index.sasi.utils.RangeIterator<OnDiskIndex.DataTerm,CombinedTerm>

org.apache.cassandra.index.sasi.utils.OnDiskIndexIterator

All Implemented Interfaces:

com.google.common.collect.PeekingIterator<CombinedTerm>, Closeable, AutoCloseable, Iterator<CombinedTerm>

public class OnDiskIndexIterator
extends RangeIterator<OnDiskIndex.DataTerm,CombinedTerm>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.index.sasi.utils.RangeIterator

RangeIterator.Builder<K extends Comparable<K>,D extends CombinedValue<K>>

Nested classes/interfaces inherited from class org.apache.cassandra.utils.AbstractGuavaIterator

AbstractGuavaIterator.State

Field Summary

Fields inherited from class org.apache.cassandra.utils.AbstractGuavaIterator

next, state

Constructor Summary

Constructors

Constructor	Description
OnDiskIndexIterator(OnDiskIndex index)

Method Summary

Modifier and Type	Method	Description
void	close()
protected CombinedTerm	computeNext()	Returns the next element.
protected void	performSkipTo(OnDiskIndex.DataTerm nextToken)
static RangeIterator<OnDiskIndex.DataTerm,CombinedTerm>	union(OnDiskIndex... union)

Methods inherited from class org.apache.cassandra.index.sasi.utils.RangeIterator

getCount, getCurrent, getMaximum, getMinimum, isOverlapping, isOverlapping, recomputeNext, skipTo, tryToComputeNext

Methods inherited from class org.apache.cassandra.utils.AbstractGuavaIterator

endOfData, hasNext, next, peek, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

OnDiskIndexIterator

public OnDiskIndexIterator(OnDiskIndex index)

Method Details

union

public static RangeIterator<OnDiskIndex.DataTerm,CombinedTerm> union(OnDiskIndex... union)

computeNext

protected CombinedTerm computeNext()

Description copied from class: AbstractGuavaIterator

Returns the next element. Note: the implementation must call AbstractGuavaIterator.endOfData() when there are no elements left in the iteration. Failure to do so could result in an infinite loop.

The initial invocation of AbstractGuavaIterator.hasNext() or AbstractGuavaIterator.next() calls this method, as does the first invocation of hasNext or next following each successful call to next. Once the implementation either invokes endOfData or throws an exception, computeNext is guaranteed to never be called again.

If this method throws an exception, it will propagate outward to the hasNext or next invocation that invoked this method. Any further attempts to use the iterator will result in an IllegalStateException.

The implementation of this method may not invoke the hasNext, next, or AbstractGuavaIterator.peek() methods on this instance; if it does, an IllegalStateException will result.

Specified by:

computeNext in class AbstractGuavaIterator<CombinedTerm>

Returns:

the next element if there was one. If endOfData was called during execution, the return value will be ignored.

performSkipTo

protected void performSkipTo(OnDiskIndex.DataTerm nextToken)

Specified by:

performSkipTo in class RangeIterator<OnDiskIndex.DataTerm,CombinedTerm>

close

public void close()
           throws IOException

Throws:

IOException