com.hp.hpl.jena.daml.common
Class LiteralAccessorImpl

java.lang.Object
  |
  +--com.hp.hpl.jena.daml.common.PropertyAccessorImpl
        |
        +--com.hp.hpl.jena.daml.common.LiteralAccessorImpl

All Implemented Interfaces:

LiteralAccessor, PropertyAccessor

Direct Known Subclasses:

IntLiteralAccessorImpl

public class LiteralAccessorImpl

extends PropertyAccessorImpl

implements LiteralAccessor

Encapsulates the standard methods of modifying a property on a DAML object, where the value of the property is an RDF literal (as opposed to another DAML value, see PropertyAccessor.

Version:

CVS info: $Id: LiteralAccessorImpl.java,v 1.1 2001/09/24 17:02:43 ijd Exp $

Author:

Ian Dickinson, HP Labs (email)

Constructor Summary

LiteralAccessorImpl(Property property, DAMLCommon val)
Construct a new accessor for literal values of the given property.

Method Summary

void	addValue(Literal value) Add a value to the encapsulated property.
void	addValue(java.lang.String value) Add a value to the encapsulated property.
Literal	getValue() Answer the a value of the encapsulated property.
NodeIterator	getValues() Answer an iteration over the literal values that this property has in the RDF model.
boolean	hasValue(Literal value) Answer true if the encapsulated property has the given value as one of its values.
boolean	hasValue(java.lang.String value) Answer true if the encapsulated property has the given value as one of its values.
void	removeValue(Literal value) Remove a value from the encapsulated property.
void	removeValue(java.lang.String value) Remove a value from the encapsulated property.

Methods inherited from class com.hp.hpl.jena.daml.common.PropertyAccessorImpl

add, count, get, getAll, getDAMLValue, getProperty, hasValue, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hp.hpl.jena.daml.PropertyAccessor

add, count, get, getAll, getDAMLValue, getProperty, hasValue, remove

Constructor Detail

LiteralAccessorImpl

public LiteralAccessorImpl(Property property,
                           DAMLCommon val)

Construct a new accessor for literal values of the given property.

Parameters:

property - The property that this accessor works on

val - The DAML value that has this property

Method Detail

getValues

public NodeIterator getValues()

Answer an iteration over the literal values that this property has in the RDF model.

Specified by:

getValues in interface LiteralAccessor

Returns:

An iteration over the values of the encapsulated property. Each member of the iteration will be an RDF literal.

getValue

public Literal getValue()

Answer the a value of the encapsulated property. If it has no values, answer null. If it has one value, answer that value. Otherwise, answer an undetermined member of the set of values.

Specified by:

getValue in interface LiteralAccessor

Returns:

A value for the encapsulated property, or null if the property has no value.

addValue

public void addValue(java.lang.String value)

Add a value to the encapsulated property.

Specified by:

addValue in interface LiteralAccessor

Parameters:

value - The value to be added, as a string.

addValue

public void addValue(Literal value)

Add a value to the encapsulated property.

Specified by:

addValue in interface LiteralAccessor

Parameters:

value - The value to be added, as an RDF literal.

removeValue

public void removeValue(java.lang.String value)

Remove a value from the encapsulated property.

Specified by:

removeValue in interface LiteralAccessor

Parameters:

value - The value to be removed, as a string.

removeValue

public void removeValue(Literal value)

Remove a value from the encapsulated property.

Specified by:

removeValue in interface LiteralAccessor

Parameters:

value - The value to be removed, as a literal.

hasValue

public boolean hasValue(java.lang.String value)

Answer true if the encapsulated property has the given value as one of its values.

Specified by:

hasValue in interface LiteralAccessor

Parameters:

value - A DAML value to test for

Returns:

True if the RDF model contains a statement giving a value for the encapsulated property matching the given value.

hasValue

public boolean hasValue(Literal value)

Answer true if the encapsulated property has the given value as one of its values.

Specified by:

hasValue in interface LiteralAccessor

Parameters:

value - A DAML value to test for

Returns:

True if the RDF model contains a statement giving a value for the encapsulated property matching the given value.