# PDAnnotationSquare.java

    /*
     * Copyright 2018 The Apache Software Foundation.
     *
     * Licensed 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.pdmodel.PDDocument;
    import org.apache.pdfbox.pdmodel.interactive.annotation.handlers.PDAppearanceHandler;
    import org.apache.pdfbox.pdmodel.interactive.annotation.handlers.PDSquareAppearanceHandler;

    /**
     *
     * @author Paul King
     */
    public class PDAnnotationSquare extends PDAnnotationSquareCircle
    {
        /**
         * The type of annotation.
         */
        public static final String SUB_TYPE = "Square";

        private PDAppearanceHandler customAppearanceHandler;

        public PDAnnotationSquare()
        {
            super(SUB_TYPE);
        }

        /**
         * Creates a square annotation from a COSDictionary, expected to be a correct object definition.
         *
         * @param field the PDF object to represent as a field.
         */
        public PDAnnotationSquare(COSDictionary field)
        {
            super(field);
        }

        /**
         * Set a custom appearance handler for generating the annotations appearance streams.
         *
         * @param appearanceHandler
         */
        public void setCustomAppearanceHandler(PDAppearanceHandler appearanceHandler)
        {
            customAppearanceHandler = appearanceHandler;
        }

        @Override
        public void constructAppearances()
        {
            this.constructAppearances(null);
        }

        @Override
        public void constructAppearances(PDDocument document)
        {
            if (customAppearanceHandler == null)
            {
                PDSquareAppearanceHandler appearanceHandler = new PDSquareAppearanceHandler(this, document);
                appearanceHandler.generateAppearanceStreams();
            }
            else
            {
                customAppearanceHandler.generateAppearanceStreams();
            }
        }
    }