Package org.apache.cassandra.index.sai.memory

Class FilteringInMemoryKeyRangeIterator

java.lang.Object

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

org.apache.cassandra.index.sai.iterators.KeyRangeIterator

org.apache.cassandra.index.sai.memory.InMemoryKeyRangeIterator

org.apache.cassandra.index.sai.memory.FilteringInMemoryKeyRangeIterator

All Implemented Interfaces:

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

public class FilteringInMemoryKeyRangeIterator
extends InMemoryKeyRangeIterator

An InMemoryKeyRangeIterator that filters the returned PrimaryKeys based on the provided keyRange

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.index.sai.iterators.KeyRangeIterator

KeyRangeIterator.Builder

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
FilteringInMemoryKeyRangeIterator(SortedSet<PrimaryKey> keys, AbstractBounds<PartitionPosition> keyRange)

Method Summary

Modifier and Type	Method	Description
protected PrimaryKey	computeNext()	Returns the next element.

Methods inherited from class org.apache.cassandra.index.sai.memory.InMemoryKeyRangeIterator

close, computeNextKey, performSkipTo

Methods inherited from class org.apache.cassandra.index.sai.iterators.KeyRangeIterator

empty, getMaximum, getMaxKeys, getMinimum, nullSafeMax, nullSafeMin, setOnClose, skipTo

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

endOfData, hasNext, next, peek, remove, tryToComputeNext

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

FilteringInMemoryKeyRangeIterator

public FilteringInMemoryKeyRangeIterator(SortedSet<PrimaryKey> keys,
 AbstractBounds<PartitionPosition> keyRange)

Method Details

computeNext

protected PrimaryKey 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.

Overrides:

computeNext in class InMemoryKeyRangeIterator

Returns:

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