Package org.apache.jena.riot.lang

Class LabelToNode

java.lang.Object

org.apache.jena.riot.system.MapWithScope<java.lang.String,Node,Node>

org.apache.jena.riot.lang.LabelToNode

public class LabelToNode
extends MapWithScope<java.lang.String,Node,Node>

Allocation Nodes (Bnodes usually) based on the graph and label Various different policies. See SyntaxLabels.createLabelToNode() for getting a default setup; some of the others are for testing and debugging and may not generate legal RDF overall (e.g. reparsing the same file gets the same bNodes)

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jena.riot.system.MapWithScope

MapWithScope.Allocator<A,B,S>, MapWithScope.ScopePolicy<A,B,S>

Constructor Summary

Constructors

Constructor	Description
LabelToNode(MapWithScope.ScopePolicy<java.lang.String,Node,Node> scopePolicy, MapWithScope.Allocator<java.lang.String,Node,Node> allocator)

Method Summary

Modifier and Type	Method	Description
static LabelToNode	createIncremental()	Allocation, globally scoped, that uses a incrementing field to create new nodes
static LabelToNode	createScopeByDocumentHash()	Allocation from a single scope; just the label matters.
static LabelToNode	createScopeByDocumentHash(java.util.UUID seed)	Allocation from a single scope; just the label matters.
static LabelToNode	createScopeByGraph()	Allocation scoped by graph and label.
static LabelToNode	createScopeGlobal()	The policy up to jena 2.10.0 - problems at very large scale
static LabelToNode	createUseLabelAsGiven()	Allocation using syntax label; output is unsafe for reading (use createUseLabelEncoded() for output-input).
static LabelToNode	createUseLabelEncoded()	Allocation using an encoded syntax label (i.e.

Methods inherited from class org.apache.jena.riot.system.MapWithScope

clear, create, get

Methods inherited from class java.lang.Object

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

Constructor Detail

LabelToNode

public LabelToNode(MapWithScope.ScopePolicy<java.lang.String,Node,Node> scopePolicy,
                   MapWithScope.Allocator<java.lang.String,Node,Node> allocator)

Method Detail

createScopeByDocumentHash

public static LabelToNode createScopeByDocumentHash()

Allocation from a single scope; just the label matters. This is the RDF syntax correct policy.

createScopeByDocumentHash

public static LabelToNode createScopeByDocumentHash(java.util.UUID seed)

Allocation from a single scope; just the label matters. Use this policy if repeated runs must give identical allocations

Parameters:

seed - Seed

createScopeGlobal

public static LabelToNode createScopeGlobal()

The policy up to jena 2.10.0 - problems at very large scale

createScopeByGraph

public static LabelToNode createScopeByGraph()

Allocation scoped by graph and label.

createUseLabelAsGiven

public static LabelToNode createUseLabelAsGiven()

Allocation using syntax label; output is unsafe for reading (use createUseLabelEncoded() for output-input). The reverse operation is provided by NodeToLabel.createBNodeByLabelAsGiven() but the pair is unsafe for output-input. Use encoded labels for that. The main purpose of this LabelToNode is to preserve the used label for debugging.

createUseLabelEncoded

public static LabelToNode createUseLabelEncoded()

Allocation using an encoded syntax label (i.e. _:B<encoded> format from NodeFmtLib.encodeBNodeLabel(java.lang.String)). The reverse operation is provided by NodeToLabel.createBNodeByLabelEncoded(). This pair should be used to write out and recover blank node by internal id.

createIncremental

public static LabelToNode createIncremental()

Allocation, globally scoped, that uses a incrementing field to create new nodes