org.jrdf.query.relation.mem
Class SortedAttributeFactoryImpl

java.lang.Object
  org.jrdf.query.relation.mem.SortedAttributeFactoryImpl

All Implemented Interfaces:

SortedAttributeFactory

public class SortedAttributeFactoryImpl
extends Object
implements SortedAttributeFactory

Allows the creation of headings.

Author:

Andrew Newman

Field Summary

Fields inherited from interface org.jrdf.query.relation.mem.SortedAttributeFactory

DEFAULT_OBJECT_NAME, DEFAULT_PREDICATE_NAME, DEFAULT_SUBJECT_NAME

Constructor Summary

SortedAttributeFactoryImpl(AttributeComparator attributeComparator, long nameCounter)

Method Summary

SortedSet<Attribute>	createHeading() Create the default heading based on a triple - subject, predicate, object.
List<Attribute>	createHeading(List<NodeType> types) Create a heading based on the given node types.

Methods inherited from class java.lang.Object

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

Constructor Detail

SortedAttributeFactoryImpl

public SortedAttributeFactoryImpl(AttributeComparator attributeComparator,
                                  long nameCounter)

Method Detail

createHeading

public SortedSet<Attribute> createHeading()

Description copied from interface: SortedAttributeFactory

Create the default heading based on a triple - subject, predicate, object.

Specified by:

createHeading in interface SortedAttributeFactory

Returns:

the default heading based on a triple - subject, predicate, object.

createHeading

public List<Attribute> createHeading(List<NodeType> types)
                              throws IllegalArgumentException

Description copied from interface: SortedAttributeFactory

Create a heading based on the given node types. Currently this only accepts triples - should be extended to support anything.

Specified by:

createHeading in interface SortedAttributeFactory

Parameters:

types - the node types usually they will be URI, bnode or Literal to override the defaults.

Returns:

a heading based on the given node types.

Throws:

IllegalArgumentException - currently if there are any more or less than 3.