# PDExternalDataDictionary.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.annotation;

    import org.apache.pdfbox.cos.COSDictionary;
    import org.apache.pdfbox.cos.COSName;
    import org.apache.pdfbox.pdmodel.common.COSObjectable;

    /**
     * This class represents an external data dictionary.
     *
     */
    public class PDExternalDataDictionary implements COSObjectable
    {

        private final COSDictionary dataDictionary;

        /**
         * Constructor.
         */
        public PDExternalDataDictionary()
        {
            this.dataDictionary = new COSDictionary();
            this.dataDictionary.setName(COSName.TYPE, "ExData");
        }

        /**
         * Constructor.
         *
         * @param dictionary Dictionary
         */
        public PDExternalDataDictionary(COSDictionary dictionary)
        {
            this.dataDictionary = dictionary;
        }

        /**
         * returns the dictionary.
         *
         * @return the dictionary
         */
        @Override
        public COSDictionary getCOSObject()
        {
            return this.dataDictionary;
        }

        /**
         * returns the type of the external data dictionary. It must be "ExData", if present
         *
         * @return the type of the external data dictionary
         */
        public String getType()
        {
            return this.getCOSObject().getNameAsString(COSName.TYPE, "ExData");
        }

        /**
         * returns the subtype of the external data dictionary.
         *
         * @return the subtype of the external data dictionary
         */
        public String getSubtype()
        {
            return this.getCOSObject().getNameAsString(COSName.SUBTYPE);
        }

        /**
         * This will set the subtype of the external data dictionary.
         *
         * @param subtype the subtype of the external data dictionary
         */
        public void setSubtype(String subtype)
        {
            this.getCOSObject().setName(COSName.SUBTYPE, subtype);
        }

    }