org.nhindirect.policy

Interface ReferencePolicyExpression<R,P>

Type Parameters:

R - The type of the reference object.

P - The type of value of the accessible PolicyValue.

All Superinterfaces:

LiteralPolicyExpression<P>, PolicyExpression, java.io.Serializable

All Known Subinterfaces:

ExtensionField<P>, TBSField<P>, X509Field<P>

All Known Implementing Classes:

AbstractExtensionField, AbstractTBSField, AbstractX509Field, AuthorityInfoAccessExtentionField, AuthorityInfoAccessOCSPLocExtentionField, AuthorityKeyIdentifierKeyIdExtensionField, BasicContraintsExtensionField, CertificatePolicyCpsUriExtensionField, CertificatePolicyIndentifierExtensionField, CRLDistributionPointNameExtentionField, ExtendedKeyUsageExtensionField, IssuerAttributeField, KeyUsageExtensionField, SerialNumberAttributeField, SignatureAlgorithmField, SubjectAltNameExtensionField, SubjectAttributeField, SubjectKeyIdentifierExtensionField, SubjectPublicKeyAlgorithmField, SubjectPublicKeySizeField

public interface ReferencePolicyExpression<R,P>
extends LiteralPolicyExpression<P>

Reference expression type object. Reference expression values are set at runtime by injecting the referenced value into the expressing using the injectReferenceValue(Object) method. Although reference expressions may reference complex objects, they functionally only allow the retrieval of an object attribute returned as a PolicyValue.
The policy engine supports either a generic structure or an X509 specific attributes. X509 reference expressions are defined in the org.nhindirect.policy.x509 package.

Author:

Greg Meyer

Method Summary

Modifier and Type	Method and Description
PolicyExpressionReferenceType	getPolicyExpressionReferenceType() Gets the type of referenceable expressions.
void	injectReferenceValue(R value) Injects the referenced value into the expressions.

Methods inherited from interface org.nhindirect.policy.LiteralPolicyExpression

getPolicyValue

Methods inherited from interface org.nhindirect.policy.PolicyExpression

getExpressionType

Method Detail

getPolicyExpressionReferenceType

PolicyExpressionReferenceType getPolicyExpressionReferenceType()

Gets the type of referenceable expressions.

Returns:

The type of referenceable expressions.

injectReferenceValue

void injectReferenceValue(R value)
                   throws PolicyProcessException

Injects the referenced value into the expressions. The relevant accessible attribute of the reference object can be retrieved by calling the LiteralPolicyExpression.getPolicyValue() method.

Parameters:

value - The reference value.

Throws:

PolicyProcessException - Thrown if the reference value cannot be successfully processed or the relevant accessible attribute cannot be retrieved from the value. For example, the X509 reference expressions may require an X509 attribute to be present in a certificate. If the required certificate attribute is not present, the this exception would be thrown.