com.neocoretechs.rocksack.iterator

Class SubSetKVIterator

java.lang.Object

com.neocoretechs.rocksack.iterator.AbstractIterator

com.neocoretechs.rocksack.iterator.SubSetIterator

com.neocoretechs.rocksack.iterator.SubSetKVIterator

All Implemented Interfaces:

java.util.Iterator<java.lang.Object>

public class SubSetKVIterator
extends SubSetIterator

Provides a persistent collection iterator 'from' element inclusive, 'to' element exclusive of KeyValuePair of Map.Entry

Author:

Jonathan Groff Copyright (C) NeoCoreTechs 2021,2022

Constructor Summary

Constructors

Constructor and Description
SubSetKVIterator(org.rocksdb.ColumnFamilyHandle cfh, java.lang.Comparable fromKey, java.lang.Comparable toKey, org.rocksdb.RocksDB db)
SubSetKVIterator(org.rocksdb.ColumnFamilyHandle cfh, java.lang.Comparable fromKey, java.lang.Comparable toKey, org.rocksdb.Transaction db)
SubSetKVIterator(java.lang.Comparable fromKey, java.lang.Comparable toKey, org.rocksdb.RocksDB db)
SubSetKVIterator(java.lang.Comparable fromKey, java.lang.Comparable toKey, org.rocksdb.Transaction db)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	next() Standard Iterator next method.

Methods inherited from class com.neocoretechs.rocksack.iterator.SubSetIterator

hasNext, remove

Methods inherited from class com.neocoretechs.rocksack.iterator.AbstractIterator

getIterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

SubSetKVIterator

public SubSetKVIterator(java.lang.Comparable fromKey,
                        java.lang.Comparable toKey,
                        org.rocksdb.RocksDB db)
                 throws java.io.IOException

Throws:

java.io.IOException

SubSetKVIterator

public SubSetKVIterator(java.lang.Comparable fromKey,
                        java.lang.Comparable toKey,
                        org.rocksdb.Transaction db)
                 throws java.io.IOException

Throws:

java.io.IOException

SubSetKVIterator

public SubSetKVIterator(org.rocksdb.ColumnFamilyHandle cfh,
                        java.lang.Comparable fromKey,
                        java.lang.Comparable toKey,
                        org.rocksdb.RocksDB db)
                 throws java.io.IOException

Throws:

java.io.IOException

SubSetKVIterator

public SubSetKVIterator(org.rocksdb.ColumnFamilyHandle cfh,
                        java.lang.Comparable fromKey,
                        java.lang.Comparable toKey,
                        org.rocksdb.Transaction db)
                 throws java.io.IOException

Throws:

java.io.IOException

Method Detail

next

public java.lang.Object next()

Description copied from class: SubSetIterator

Standard Iterator next method. To make it resistant to deletes and insertions, we re-traverse the key on each iteration. A somewhat inefficient yet failsafe approach.

Specified by:

next in interface java.util.Iterator<java.lang.Object>

Overrides:

next in class SubSetIterator