1 /* 2 * Copyright [2007] [University Corporation for Advanced Internet Development, Inc.] 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package edu.internet2.middleware.shibboleth.common.attribute.filtering.provider.match.basic; 18 19 import edu.internet2.middleware.shibboleth.common.attribute.filtering.provider.FilterProcessingException; 20 import edu.internet2.middleware.shibboleth.common.attribute.filtering.provider.MatchFunctor; 21 import edu.internet2.middleware.shibboleth.common.attribute.filtering.provider.ShibbolethFilteringContext; 22 23 /** 24 * Base class for {@link edu.internet2.middleware.shibboleth.common.attribute.filtering.provider.MatchFunctor}s that 25 * delegate the evaluation and negate the result if necessary. 26 * 27 * This class provides an extension point for functionality across all match functors. 28 */ 29 public abstract class AbstractMatchFunctor implements MatchFunctor { 30 31 /** {@inheritDoc} */ 32 public boolean evaluatePolicyRequirement(ShibbolethFilteringContext filterContext) throws FilterProcessingException { 33 return doEvaluatePolicyRequirement(filterContext); 34 } 35 36 /** {@inheritDoc} */ 37 public boolean evaluatePermitValue(ShibbolethFilteringContext filterContext, String attributeId, 38 Object attributeValue) throws FilterProcessingException { 39 return doEvaluateValue(filterContext, attributeId, attributeValue); 40 } 41 42 /** {@inheritDoc} */ 43 public boolean evaluateDenyRule(ShibbolethFilteringContext filterContext, String attributeId, Object attributeValue) 44 throws FilterProcessingException { 45 return evaluatePermitValue(filterContext, attributeId, attributeValue); 46 } 47 48 /** 49 * Evaluates this matching criteria. This evaluation is used while the filtering engine determines policy 50 * applicability. 51 * 52 * @param filterContext current filtering context 53 * 54 * @return true if the criteria for this matching function are meant 55 * 56 * @throws FilterProcessingException thrown if the function can not be evaluated 57 */ 58 protected abstract boolean doEvaluatePolicyRequirement(ShibbolethFilteringContext filterContext) 59 throws FilterProcessingException; 60 61 /** 62 * Evaluates this matching criteria. This evaluation is used while the filtering engine is evaluating either a deny 63 * or permit value rule. 64 * 65 * @param filterContext the current filtering context 66 * @param attributeId ID of the attribute being evaluated 67 * @param attributeValue value of the attribute being evalauted 68 * 69 * @return true if the criteria for this matching function are meant 70 * 71 * @throws FilterProcessingException thrown if the function can not be evaluated 72 */ 73 protected abstract boolean doEvaluateValue(ShibbolethFilteringContext filterContext, String attributeId, 74 Object attributeValue) throws FilterProcessingException; 75 }