# PDSeedValueMDP.java

    /*
     * 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 org.apache.pdfbox.pdmodel.interactive.digitalsignature;

    import org.apache.pdfbox.cos.COSDictionary;
    import org.apache.pdfbox.cos.COSName;

    /**
     * This MDP dictionary is a part of the seed value dictionary and define
     * if a author signature or a certification signature should be use.
     *
     * @author Thomas Chojecki
     */
    public class PDSeedValueMDP
    {
        private final COSDictionary dictionary;

        /**
         * Default constructor.
         */
        public PDSeedValueMDP()
        {
            dictionary = new COSDictionary();
            dictionary.setDirect(true);
        }

        /**
         * Constructor.
         *
         * @param dict The signature dictionary.
         */
        public PDSeedValueMDP(COSDictionary dict)
        {
            dictionary = dict;
            dictionary.setDirect(true);
        }

        /**
         * Convert this standard java object to a COS dictionary.
         *
         * @return The COS dictionary that matches this Java object.
         */
        public COSDictionary getCOSObject()
        {
            return dictionary;
        }

        /**
         * Return the P value.
         *
         * @return the P value
         */
        public int getP()
        {
            return dictionary.getInt(COSName.P);
        }

        /**
         * Set the P value.
         *
         * @param p the value to be set as P
         */
        public void setP(int p)
        {
            if (p < 0 || p > 3)
            {
                throw new IllegalArgumentException("Only values between 0 and 3 nare allowed.");
            }
            dictionary.setInt(COSName.P, p);
        }
    }