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public interface Association
Extension of Property to represent an Association, or relationship, between two attributes.
The notion of an "association" is similar to that of an association in UML and is used to model a relationship between entities.
Examples of such a relationship could be:
The value of an association is an Attribute
. As an example consider
the following xml complex type definitions:
<complexType name="fooType"> ... </complexType> <element name="foo" type="fooType"/> <complexType name="barType"> <sequence> <element name="intAttribute" type="xs:int"/> <element name="stringAttribute" type="xs:string"/> <element name="fooAssociation" type="xlink:href"/> </sequence> </complexType> <element name="bar" type="barType"/>In the above, "fooType" is an identifiable type. Now consider the following section of an xml instance document:
<foo id="someId"> ... </foo> ... <bar> <intAttribute>1</intAttribute> <stringAttribute>one</stringAttribute> <fooAssociation>someId</fooAssociation> </bar>Realizing this as objects with attributes and associations we get:
ComplexAttribute bar = ...; //intAttribute Attribute intAttribute = (Attribute) bar.getProperty( "intAttribute" ); intAttribute.getValue() == 1 //stringAttribute Attribute stringAttribute = (Attribute) bar.getProperty( "stringAttribute" ); stringAttribute.getValue() == "one" //fooAssociation Association fooAssociation = (Association) bar.getProperty( "fooAssociation" ); Attribute foo = fooAssociation.getValue();
Method Summary | |
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AssociationDescriptor |
getDescriptor()
Description of the relationship between two attributes. |
AttributeType |
getRelatedType()
Returns the type of the associated attribute. |
AssociationType |
getType()
Type of association represented. |
Attribute |
getValue()
Override of Property.getValue() which type narrows to
Attribute . |
void |
setValue(Object newValue)
Override of Property.setValue(Object) which specifies that
newValue should be an instance of Attribute . |
Methods inherited from interface Property |
---|
getName, getUserData, isNillable |
Method Detail |
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AssociationDescriptor getDescriptor()
Property.getDescriptor()
which type narrows to
AssociationDescriptor
.
getDescriptor
in interface Property
Property.getDescriptor()
AssociationType getType()
Override of Property.getType()
which type narrows to
AssociationType
.
getType
in interface Property
Property.getType()
Attribute getValue()
Property.getValue()
which type narrows to
Attribute
.
getValue
in interface Property
Property.getValue()
void setValue(Object newValue) throws IllegalArgumentException
Property.setValue(Object)
which specifies that
newValue should be an instance of Attribute
.
setValue
in interface Property
newValue
- The new value of the property.
IllegalArgumentException
- If newValue is not an attribute.AttributeType getRelatedType()
This method is a convenience for:
getType().getRelatedType()
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