Module org.apache.jena.arq

Package org.apache.jena.riot.lang

Class BlankNodeAllocatorCounter

java.lang.Object

org.apache.jena.riot.lang.BlankNodeAllocatorCounter

All Implemented Interfaces:

BlankNodeAllocator

public class BlankNodeAllocatorCounter
extends Object
implements BlankNodeAllocator

Allocate blank nodes according a counter.

This can be used to track blank nodes by encounter order in a parser.

Use NodeToLabel.createBNodeByLabelEncoded() to recover the increment.

Use BlankNodeAllocatorLabelEncoded and NodeToLabel.createBNodeByLabelEncoded() for round-trip of labels used in the original data input.

Constructor Summary

Constructors

Constructor	Description
BlankNodeAllocatorCounter()

Method Summary

Modifier and Type	Method	Description
org.apache.jena.graph.Node	alloc(String label)	Allocate based on a non-null label.
org.apache.jena.graph.Node	create()	Create a fresh blank node, different from anything generated so far.
void	reset()	Reset allocation state - calls to BlankNodeAllocator.alloc(java.lang.String) will return a different blank node for a label than the one returned before the reset.

Methods inherited from class java.lang.Object

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

Constructor Details

BlankNodeAllocatorCounter

public BlankNodeAllocatorCounter()

Method Details

reset

public void reset()

Description copied from interface: BlankNodeAllocator

Reset allocation state - calls to BlankNodeAllocator.alloc(java.lang.String) will return a different blank node for a label than the one returned before the reset.

Specified by:

reset in interface BlankNodeAllocator

alloc

public org.apache.jena.graph.Node alloc(String label)

Description copied from interface: BlankNodeAllocator

Allocate based on a non-null label. Calling this twice, with the same label will generate equivalent nodes but they may not be identical (i.e they are .equals but may not be ==)

Specified by:

alloc in interface BlankNodeAllocator

create

public org.apache.jena.graph.Node create()

Description copied from interface: BlankNodeAllocator

Create a fresh blank node, different from anything generated so far. Will not clash with a node allocated by BlankNodeAllocator.alloc(java.lang.String)

Specified by:

create in interface BlankNodeAllocator