Module org.apache.jena.core

Package org.apache.jena.mem

Class GraphMemLegacy

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.mem.GraphMem

org.apache.jena.mem.GraphMemLegacy

All Implemented Interfaces:

org.apache.jena.atlas.lib.Copyable<GraphMem>, Graph, GraphWithPerform

public class GraphMemLegacy
extends GraphMem

A graph that stores triples in memory. This class is not thread-safe.

Purpose: Use this graph implementation if you want to maintain the 'old' behavior of GraphMem or if your memory constraints prevent you from utilizing more memory-intensive solutions.

Slightly improved performance compared to GraphMemValue Simplified implementation, primarily due to lack of support for Iterator#remove

The heritage of GraphMem:

• Same basic structure
• Same memory consumption
• Also based on HashCommon

This implementation is based on the original GraphMemValue implementation. The main difference is that it strictly uses term equality for all nodes. The inner workings of the used structures like ArrayBunch and HashedBunchMap are not changed.

Field Summary

Fields inherited from class org.apache.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface org.apache.jena.graph.Graph

emptyGraph

Constructor Summary

Constructors

Constructor	Description
GraphMemLegacy()

Method Summary

Modifier and Type	Method	Description
GraphMemLegacy	copy()	Creates a copy of this graph.

Methods inherited from class org.apache.jena.mem.GraphMem

clear, graphBaseContains, graphBaseFind, graphBaseSize, performAdd, performDelete, stream, stream

Methods inherited from class org.apache.jena.graph.impl.GraphBase

add, close, contains, contains, delete, find, find, forTestingOnly_graphBaseFind, getEventManager, getPrefixMapping, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, remove, size, toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.graph.Graph

add, add, close, contains, contains, delete, delete, find, find, find, getEventManager, getPrefixMapping, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, remove, size, sizeLong

Constructor Details

GraphMemLegacy

public GraphMemLegacy()

Method Details

copy

public GraphMemLegacy copy()

Description copied from class: GraphMem

Creates a copy of this graph. Since the triples and nodes are immutable, the copy contains the same triples and nodes as this graph. Modifications to the copy will not affect this graph.

Specified by:

copy in interface org.apache.jena.atlas.lib.Copyable<GraphMem>

Overrides:

copy in class GraphMem

Returns:

independent copy of the current graph