/* Copyright 2012-2015 SAP SE
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package eu.aniketos.securebpmn.xacml.pdp.runtimeEvaluation.attributes;
import eu.aniketos.securebpmn.xacml.api.autho.AttributeIdentifier;
import com.sun.xacml.EvaluationCtx;
import com.sun.xacml.attr.BagAttribute;
import com.sun.xacml.debug.RuntimeInfo;
public interface AnalysisAttributeResolver {
/**
* may return three different "types" of results
* <ul>
* <li>null, indicating that this object cannot resolve the attribute.
* the next attributeResolver in the list will be queried</li>
* <li>an empty bag, indicating that the resolution of the attribute
* is simulated to fail: the empty bag is returned to the
* evaluation engine, no further attributeResolver will be
* queried </li>
* <li>a bag with one or several attribute values. the bag is returned
* to the evaluation engine, no further attributeResolver will be
* queried</li>
* </ul>
*
* @param attrId
* @param context
* @param resolver
* @return
*/
BagAttribute resolveAttribute(AttributeIdentifier attrId,
EvaluationCtx context, RuntimeInfo runtimeInfo);
}