org.h2.mvstore.rtree

Class MVRTreeMap<V>

java.lang.Object

java.util.AbstractMap<K,V>

org.h2.mvstore.MVMap<SpatialKey,V>

org.h2.mvstore.rtree.MVRTreeMap<V>

Type Parameters:

V - the value class

All Implemented Interfaces:

java.util.concurrent.ConcurrentMap<SpatialKey,V>, java.util.Map<SpatialKey,V>

public final class MVRTreeMap<V>
extends MVMap<SpatialKey,V>

An r-tree implementation. It supports both the linear and the quadratic split algorithm.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MVRTreeMap.Builder<V> A builder for this class.
static class	MVRTreeMap.RTreeCursor A cursor to iterate over a subset of the keys.

Nested classes/interfaces inherited from class org.h2.mvstore.MVMap

MVMap.BasicBuilder<M extends MVMap<K,V>,K,V>, MVMap.Decision, MVMap.DecisionMaker<V>, MVMap.MapBuilder<M extends MVMap<K,V>,K,V>

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Field Summary

Fields inherited from class org.h2.mvstore.MVMap

store

Constructor Summary

Constructors

Constructor and Description
MVRTreeMap(java.util.Map<java.lang.String,java.lang.Object> config)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(SpatialKey key, V value) Add a given key-value pair.
void	addNodeKeys(java.util.ArrayList<SpatialKey> list, Page p) Add all node keys (including internal bounds) to the given list.
MVRTreeMap<V>	cloneIt() Clone the current map.
MVRTreeMap.RTreeCursor	findContainedKeys(SpatialKey x) Iterate over all keys that are fully contained within the given rectangle.
MVRTreeMap.RTreeCursor	findIntersectingKeys(SpatialKey x) Iterate over all keys that have an intersection with the given rectangle.
V	get(Page p, java.lang.Object key) Get the object for the given key.
protected int	getChildPageCount(Page p) Get the child page count for this page.
java.lang.String	getType() Get the map type.
boolean	isQuadraticSplit()
V	operate(SpatialKey key, V value, MVMap.DecisionMaker<? super V> decisionMaker) Add, replace or remove a key-value pair.
V	put(SpatialKey key, V value) Add or replace a key-value pair.
V	remove(java.lang.Object key) Remove a key-value pair, if the key exists.
void	setQuadraticSplit(boolean quadraticSplit)

Methods inherited from class org.h2.mvstore.MVMap

append, asString, beforeWrite, ceilingKey, clear, containsKey, createEmptyLeaf, createEmptyNode, cursor, entrySet, equals, firstKey, floorKey, flushAndGetRoot, get, getCreateVersion, getId, getKey, getKeyIndex, getKeyType, getName, getRoot, getRootPage, getStore, getValueType, getVersion, hashCode, higherKey, isClosed, isEmpty, isReadOnly, isVolatile, keyIterator, keyList, keySet, lastKey, lowerKey, openVersion, putIfAbsent, remove, removePage, replace, replace, setVolatile, size, sizeAsLong, toString, trimLast, updateRoot

Methods inherited from class java.util.AbstractMap

clone, containsValue, putAll, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

containsValue, putAll, values

Constructor Detail

MVRTreeMap

public MVRTreeMap(java.util.Map<java.lang.String,java.lang.Object> config)

Method Detail

cloneIt

public MVRTreeMap<V> cloneIt()

Description copied from class: MVMap

Clone the current map.

Overrides:

cloneIt in class MVMap<SpatialKey,V>

Returns:

clone of this.

findIntersectingKeys

public MVRTreeMap.RTreeCursor findIntersectingKeys(SpatialKey x)

Iterate over all keys that have an intersection with the given rectangle.

Parameters:

x - the rectangle

Returns:

the iterator

findContainedKeys

public MVRTreeMap.RTreeCursor findContainedKeys(SpatialKey x)

Iterate over all keys that are fully contained within the given rectangle.

Parameters:

x - the rectangle

Returns:

the iterator

get

public V get(Page p,
    java.lang.Object key)

Get the object for the given key. An exact match is required.

Overrides:

get in class MVMap<SpatialKey,V>

Parameters:

p - the page

key - the key

Returns:

the value, or null if not found

remove

public V remove(java.lang.Object key)

Remove a key-value pair, if the key exists.

Specified by:

remove in interface java.util.Map<SpatialKey,V>

Overrides:

remove in class MVMap<SpatialKey,V>

Parameters:

key - the key (may not be null)

Returns:

the old value if the key existed, or null otherwise

operate

public V operate(SpatialKey key,
        V value,
        MVMap.DecisionMaker<? super V> decisionMaker)

Description copied from class: MVMap

Add, replace or remove a key-value pair.

Overrides:

operate in class MVMap<SpatialKey,V>

Parameters:

key - the key (may not be null)

value - new value, it may be null when removal is intended

decisionMaker - command object to make choices during transaction.

Returns:

previous value, if mapping for that key existed, or null otherwise

put

public V put(SpatialKey key,
    V value)

Description copied from class: MVMap

Add or replace a key-value pair.

Specified by:

put in interface java.util.Map<SpatialKey,V>

Overrides:

put in class MVMap<SpatialKey,V>

Parameters:

key - the key (may not be null)

value - the value (may not be null)

Returns:

the old value if the key existed, or null otherwise

add

public void add(SpatialKey key,
       V value)

Add a given key-value pair. The key should not exist (if it exists, the result is undefined).

Parameters:

key - the key

value - the value

addNodeKeys

public void addNodeKeys(java.util.ArrayList<SpatialKey> list,
               Page p)

Add all node keys (including internal bounds) to the given list. This is mainly used to visualize the internal splits.

Parameters:

list - the list

p - the root page

isQuadraticSplit

public boolean isQuadraticSplit()

setQuadraticSplit

public void setQuadraticSplit(boolean quadraticSplit)

getChildPageCount

protected int getChildPageCount(Page p)

Description copied from class: MVMap

Get the child page count for this page. This is to allow another map implementation to override the default, in case the last child is not to be used.

Overrides:

getChildPageCount in class MVMap<SpatialKey,V>

Parameters:

p - the page

Returns:

the number of direct children

getType

public java.lang.String getType()

Description copied from class: MVMap

Get the map type. When opening an existing map, the map type must match.

Overrides:

getType in class MVMap<SpatialKey,V>

Returns:

the map type