org.jrdf.query.relation.mem
Interface SortedAttributeFactory

All Known Implementing Classes:

SortedAttributeFactoryImpl

public interface SortedAttributeFactory

Allows the creation of headings.

Version:

$Revision:$

Author:

Andrew Newman

Field Summary

static String	DEFAULT_OBJECT_NAME The default name of a object heading.
static String	DEFAULT_PREDICATE_NAME The default name of a predicate heading.
static String	DEFAULT_SUBJECT_NAME The default name of a subject heading.

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.

Field Detail

DEFAULT_SUBJECT_NAME

static final String DEFAULT_SUBJECT_NAME

The default name of a subject heading.

See Also:

Constant Field Values

DEFAULT_PREDICATE_NAME

static final String DEFAULT_PREDICATE_NAME

The default name of a predicate heading.

See Also:

Constant Field Values

DEFAULT_OBJECT_NAME

static final String DEFAULT_OBJECT_NAME

The default name of a object heading.

See Also:

Constant Field Values

Method Detail

createHeading

SortedSet<Attribute> createHeading()

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

Returns:

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

createHeading

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

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

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.