001/*
002 * oauth2-oidc-sdk
003 *
004 * Copyright 2012-2020, Connect2id Ltd and contributors.
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use
007 * this file except in compliance with the License. You may obtain a copy of the
008 * License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software distributed
013 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
014 * CONDITIONS OF ANY KIND, either express or implied. See the License for the
015 * specific language governing permissions and limitations under the License.
016 */
017
018package com.nimbusds.openid.connect.sdk.federation.policy.operations;
019
020
021import java.util.List;
022
023import com.nimbusds.openid.connect.sdk.federation.policy.language.PolicyOperation;
024import com.nimbusds.openid.connect.sdk.federation.policy.language.PolicyViolationException;
025
026
027/**
028 * Validates the permitted combinations of known policy operations for a given
029 * metadata parameter.
030 *
031 * <p>To support combinations including non-standard policy operations on
032 * metadata parameters consider overriding
033 * {@link DefaultPolicyOperationCombinationValidator#validate(List)}.
034 *
035 * <p>Related specifications:
036 *
037 * <ul>
038 *     <li>OpenID Connect Federation 1.0, section 5.1.4.
039 * </ul>
040 */
041public interface PolicyOperationCombinationValidator {
042        
043        
044        /**
045         * Validates the specified combination of policy operations.
046         *
047         * @param policyOperations The policy operations, empty list if none.
048         *
049         * @return The validated and optionally optimised policy operations.
050         *
051         * @throws PolicyViolationException On a illegal policy combination.
052         */
053        List<PolicyOperation> validate(final List<PolicyOperation> policyOperations)
054                throws PolicyViolationException;
055}