com.sun.xacml.cond
Interface Evaluatable

All Known Implementing Classes:

Apply, AttributeDesignator, AttributeSelector, AttributeValue

public interface Evaluatable

Generic interface that is implemented by all objects that can appear in an ApplyType. This lets the evaluation code of Apply and functions iterate through their members and evaluate them, working only on the returned values or errors.

Since:

1.0

Method Summary

void	encode(OutputStream output) Encodes this Evaluatable into its XML representation and writes this encoding to the given OutputStream with no indentation.
void	encode(OutputStream output, Indenter indenter) Encodes this Evaluatable into its XML representation and writes this encoding to the given OutputStream with indentation.
EvaluationResult	evaluate(EvaluationCtx context) Evaluates the object using the given context, and either returns an error or a resulting value.
boolean	evaluatesToBag() Tells whether evaluation will return a bag or a single value.
List	getChildren() Returns all children, in order, of this element in the Condition tree, or en empty set if this element has no children.
URI	getType() Get the type of this object.

Method Detail

evaluate

public EvaluationResult evaluate(EvaluationCtx context)

Evaluates the object using the given context, and either returns an error or a resulting value.

Parameters:

context - the representation of the request

Returns:

the result of evaluation

getType

public URI getType()

Get the type of this object. This may be the data type of an Attribute or the return type of an AttributeDesignator, etc.

Returns:

the type of data represented by this object

evaluatesToBag

public boolean evaluatesToBag()

Tells whether evaluation will return a bag or a single value.

Returns:

true if evaluation will return a bag, false otherwise

getChildren

public List getChildren()

Returns all children, in order, of this element in the Condition tree, or en empty set if this element has no children. In XACML 1.x, only the ApplyType ever has children.

Returns:

a List of Evaluatables

encode

public void encode(OutputStream output)

Encodes this Evaluatable into its XML representation and writes this encoding to the given OutputStream with no indentation.

Parameters:

output - a stream into which the XML-encoded data is written

encode

public void encode(OutputStream output,
                   Indenter indenter)

Encodes this Evaluatable into its XML representation and writes this encoding to the given OutputStream with indentation.

Parameters:

output - a stream into which the XML-encoded data is written

indenter - an object that creates indentation strings