The caller must pass in a Class<? extends Attribute> value. This method first checks if an instance of that class is already in this AttributeSource and returns it. Otherwise a new instance is created, added to this AttributeSource and returned. Signature for Java 1.5:

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public <T extends Attribute> T addAttribute(Class<T>)

public virtual Attribute AddAttribute(
	Type attClass
)

Public Overridable Function AddAttribute ( _
	attClass As Type _
) As Attribute

public:
virtual Attribute^ AddAttribute(
	Type^ attClass
)