Examples of com.sun.xacml.finder.PolicyFinderResult

com.sun.xacml.finder.PolicyFinderResult
This is used as the return value for the findPolicy() methods in the PolicyFinder. It communicates either a found policy that applied to the request (eg, the target matches), an Indeterminate state, or no applicable policies.
The OnlyOneApplicable combining logic is used in looking for a policy, so the result from calling findPolicy can never be more than one policy. @since 1.0 @author Seth Proctor

    public PolicyFinderResult findPolicy(EvaluationCtx context) {
        try {
            AbstractPolicy policy = policies.getPolicy(context);


            if (policy == null)
                return new PolicyFinderResult();
            else
                return new PolicyFinderResult(policy);
        } catch (TopLevelPolicyException tlpe) {
            return new PolicyFinderResult(tlpe.getStatus());
        }
    }

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        URL url = null;
        try {
            url = new URL(idReference.toString());
        } catch (MalformedURLException murle) {
            // it's not a URL, so we can't handle this reference
            return new PolicyFinderResult();
        }


        // try resolving the URL
        AbstractPolicy policy = null;
        try {
            policy = reader.readPolicy(url);
        } catch (ParsingException pe) {
            // An error loading the policy could be many things (the URL
            // doesn't actually resolve a policy, the server is down, the
            // policy is invalid, etc.). This could be interpreted as an
            // error case, or simply as a case where no applicable policy
            // is available (as is done when we pre-load policies). This
            // module chooses the latter interpretation.
            return new PolicyFinderResult();
        }


        // check that we got the right kind of policy...if we didn't, then
        // we can't handle the reference
        if (type == PolicyReference.POLICY_REFERENCE) {
            if (!(policy instanceof Policy))
                return new PolicyFinderResult();
        } else {
            if (!(policy instanceof PolicySet))
                return new PolicyFinderResult();
        }


        // finally, check that the constraints match ... note that in a more
        // powerful module, you could actually have used the constraints to
        // construct a more specific URL, passed the constraints to the
        // server, etc., but this example module is staying simple
        if (!constraints.meetsConstraint(policy.getVersion()))
            return new PolicyFinderResult();


        // if we got here, then we successfully resolved a policy that is
        // the correct type, so return it
        return new PolicyFinderResult(policy);
    }

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    public PolicyFinderResult findPolicy(EvaluationCtx context) {
        try {
            AbstractPolicy policy = ctxPolicies.getPolicy(context);


            if (policy == null)
                return new PolicyFinderResult();
            else
                return new PolicyFinderResult(policy);
        } catch (TopLevelPolicyException tlpe) {
            return new PolicyFinderResult(tlpe.getStatus());
        }
    }

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    public PolicyFinderResult findPolicy(URI idReference, int type, VersionConstraints constraints,
            PolicyMetaData parentMetaData) {
        AbstractPolicy policy = refPolicies.getPolicy(idReference.toString(), type, constraints);


        if (policy == null)
            return new PolicyFinderResult();
        else
            return new PolicyFinderResult(policy);
    }

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     * A private helper routine that resolves a policy for the given context, and then tries to
     * evaluate based on the policy
     */
    private Result evaluateContext(EvaluationCtx context) {
        // first off, try to find a policy
        PolicyFinderResult finderResult = policyFinder.findPolicy(context);


        // see if there weren't any applicable policies
        if (finderResult.notApplicable())
            return new Result(Result.DECISION_NOT_APPLICABLE, context.getResourceId().encode());


        // see if there were any errors in trying to get a policy
        if (finderResult.indeterminate())
            return new Result(Result.DECISION_INDETERMINATE, finderResult.getStatus(), context
                    .getResourceId().encode());


        // we found a valid policy, so we can do the evaluation
        return finderResult.getPolicy().evaluate(context);
    }

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    public PolicyFinderResult findPolicy(URI idReference, int type, VersionConstraints constraints,
            PolicyMetaData parentMetaData) {
        AbstractPolicy policy = policies.getPolicy(idReference.toString(), type, constraints);


        if (policy == null)
            return new PolicyFinderResult();
        else
            return new PolicyFinderResult(policy);
    }

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     */
    public PolicyFinderResult findPolicy(EvaluationCtx context) {
        try {
            AbstractPolicy policy = policies.getPolicy(context);
            if (policy == null)
                return new PolicyFinderResult();
            else
                return new PolicyFinderResult(policy);
        } catch (TopLevelPolicyException tlpe) {
            return new PolicyFinderResult(tlpe.getStatus());
        }
    }

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                        + " was queried but was " + "not configured with a PolicyFinder");


            throw new ProcessingException("couldn't find the policy with " + "a null finder");
        }


        PolicyFinderResult pfr = finder.findPolicy(reference, policyType, constraints,
                parentMetaData);


        if (pfr.notApplicable())
            throw new ProcessingException("couldn't resolve the policy");


        if (pfr.indeterminate())
            throw new ProcessingException("error resolving the policy");


        return pfr.getPolicy();
    }

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    public Result evaluate(EvaluationCtx context) {
        // if there is no finder, then we return NotApplicable
        if (finder == null)
            return new Result(Result.DECISION_NOT_APPLICABLE, context.getResourceId().encode());


        PolicyFinderResult pfr = finder.findPolicy(reference, policyType, constraints,
                parentMetaData);


        // if we found nothing, then we return NotApplicable
        if (pfr.notApplicable())
            return new Result(Result.DECISION_NOT_APPLICABLE, context.getResourceId().encode());


        // if there was an error, we return that status data
        if (pfr.indeterminate())
            return new Result(Result.DECISION_INDETERMINATE, pfr.getStatus(), context
                    .getResourceId().encode());


        // we must have found a policy
        return pfr.getPolicy().evaluate(context);
    }

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            MatchResult match = policy.match(context);
            int result = match.getResult();


            // if target matching was indeterminate, then return the error
            if (result == MatchResult.INDETERMINATE)
                return new PolicyFinderResult(match.getStatus());


            // see if the target matched
            if (result == MatchResult.MATCH) {
                // see if we previously found another match
                if (selectedPolicy != null) {
                    // we found a match before, so this is an error
                    ArrayList<String> code = new ArrayList<String>();
                    code.add(Status.STATUS_PROCESSING_ERROR);
                    Status status = new Status(code, "too many applicable " + "top-level policies");
                    return new PolicyFinderResult(status);
                }


                // this is the first match we've found, so remember it
                selectedPolicy = policy;
            }
        }


        // return the single applicable policy (if there was one)
        return new PolicyFinderResult(selectedPolicy);
    }

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