Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You 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.
/**
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 javax.security.auth.message;

public class MessagePolicy {

    private final TargetPolicy[] targetPolicies;
    private final boolean mandatory;

    public MessagePolicy(TargetPolicy[] targetPolicies, boolean mandatory) {
        if (targetPolicies == null) {
            throw new IllegalArgumentException("targetPolicies is null");
        }
        this.targetPolicies = targetPolicies;
        this.mandatory = mandatory;
    }

    public boolean isMandatory() {
        return mandatory;
    }

    public TargetPolicy[] getTargetPolicies() {
        if (targetPolicies.length == 0) {
            return null;
        }
        return targetPolicies;
    }

    public static interface ProtectionPolicy {

        static String AUTHENTICATE_SENDER = "#authenticateSender";
        static String AUTHENTICATE_CONTENT = "#authenticateContent";
        static String AUTHENTICATE_RECIPIENT = "#authenticateRecipient";

        String getID();
    }

    public static interface Target {

        Object get(MessageInfo messageInfo);

        void remove(MessageInfo messageInfo);

        void put(MessageInfo messageInfo, Object data);
    }

    public static class TargetPolicy {

        private final Target[] targets;
        private final ProtectionPolicy protectionPolicy;

        public TargetPolicy(Target[] targets, ProtectionPolicy protectionPolicy) {
            if (protectionPolicy == null) {
                throw new IllegalArgumentException("protectionPolicy is null");
            }
            this.targets = targets;
            this.protectionPolicy = protectionPolicy;
        }

        public Target[] getTargets() {
            if (targets == null || targets.length == 0) {
                return null;
            }
            return targets;
        }

        public ProtectionPolicy getProtectionPolicy() {
            return protectionPolicy;
        }
    }
}