com.hp.hpl.swade.portal
Class MultiStatementWrapper

java.lang.Object
  |
  +--com.hp.hpl.swade.portal.MultiStatementWrapper

All Implemented Interfaces:

java.lang.Comparable

public class MultiStatementWrapper

extends java.lang.Object

implements java.lang.Comparable

A wrapper around a set of property/value pairs. This roughly corresponds to a set of RDF statements except that the property value of each statement is expected to be the same.

However, this is not an invariant and is not checked.

Version:

$Revision: 1.3 $ on $Date: 2004/07/04 20:30:54 $

Author:

Dave Reynolds

Field Summary

protected DataSource	datasource The datasource this node is located in
protected java.util.Map	sources Map from statements in this wrapper to their sources
protected java.util.List	statements The list of statements in the wrapper

Constructor Summary

MultiStatementWrapper(DataSource datasource)
Constructor

MultiStatementWrapper(java.util.Iterator stmts, DataSource datasource)
Constructor.

Method Summary

void	add(com.hp.hpl.jena.rdf.model.Statement stmt) Add an additional statement to set.
int	compareTo(java.lang.Object o1) Comparison based on displayname of property.
ResourceWrapper	getProp() Return the property as a wrapped resource
java.lang.String	getPropName() Return the displayable name of the property whose values are being wrapped.
NodeWrapper	getStatementSource() Return a wrapped resource representing the data source of an arbitrary value for this multi statement or null if it is not known.
NodeWrapper	getStatementSource(java.lang.Object value) Return a wrapped resource representing the data source of the given value of this multi-statement or null if it is not known.
java.util.List	getSubjects() Return the set of subject values as wrapped objects.
NodeWrapper	getValue() Return a wrapped arbitrary single value from this set or null if it is empty.
java.util.List	getValues() Return the set of property values as a list of wrapper objects.
boolean	hasValue(java.lang.String resource) Test if the MSW contains the given resource.
boolean	isEmpty() Return true if this wrapper contains no statements.

Methods inherited from class java.lang.Object

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

Field Detail

statements

protected java.util.List statements

The list of statements in the wrapper

datasource

protected DataSource datasource

The datasource this node is located in

sources

protected java.util.Map sources

Map from statements in this wrapper to their sources

Constructor Detail

MultiStatementWrapper

public MultiStatementWrapper(DataSource datasource)

Constructor

MultiStatementWrapper

public MultiStatementWrapper(java.util.Iterator stmts,
                             DataSource datasource)

Constructor.

Parameters:

stmts - an iterator over the statements to include

Method Detail

add

public void add(com.hp.hpl.jena.rdf.model.Statement stmt)

Add an additional statement to set.

isEmpty

public boolean isEmpty()

Return true if this wrapper contains no statements.

getPropName

public java.lang.String getPropName()

Return the displayable name of the property whose values are being wrapped. This will return an arbitrary name in the case where more than one property has been mixed up in the set.

getProp

public ResourceWrapper getProp()

Return the property as a wrapped resource

getValues

public java.util.List getValues()

Return the set of property values as a list of wrapper objects. Currently these are not cached.

getSubjects

public java.util.List getSubjects()

Return the set of subject values as wrapped objects. Normally this will be a single subject but there are strange uses for which there might be more. Currently these are not cached.

hasValue

public boolean hasValue(java.lang.String resource)

Test if the MSW contains the given resource.

getValue

public NodeWrapper getValue()

Return a wrapped arbitrary single value from this set or null if it is empty.

getStatementSource

public NodeWrapper getStatementSource(java.lang.Object value)

Return a wrapped resource representing the data source of the given value of this multi-statement or null if it is not known. The source locations are cached on demand.

getStatementSource

public NodeWrapper getStatementSource()

Return a wrapped resource representing the data source of an arbitrary value for this multi statement or null if it is not known. The source locations are cached on demand.

compareTo

public int compareTo(java.lang.Object o1)

Comparison based on displayname of property.

Specified by:

compareTo in interface java.lang.Comparable