# AnnotationBorder.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.handlers;

    import org.apache.pdfbox.cos.COSArray;
    import org.apache.pdfbox.cos.COSBase;
    import org.apache.pdfbox.cos.COSNumber;
    import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotation;
    import org.apache.pdfbox.pdmodel.interactive.annotation.PDBorderStyleDictionary;

    /**
     * Class to collect all sort of border info about annotations.
     *
     * @author Tilman Hausherr
     */
    class AnnotationBorder
    {
        float[] dashArray = null;
        boolean underline = false;
        float width = 0;

        // return border info. BorderStyle must be provided as parameter because
        // method is not available in the base class
        static AnnotationBorder getAnnotationBorder(PDAnnotation annotation,
                PDBorderStyleDictionary borderStyle)
        {
            AnnotationBorder ab = new AnnotationBorder();
            if (borderStyle == null)
            {
                COSArray border = annotation.getBorder();
                if (border.size() >= 3 && border.getObject(2) instanceof COSNumber)
                {
                    ab.width = ((COSNumber) border.getObject(2)).floatValue();
                }
                if (border.size() > 3)
                {
                    COSBase base3 = border.getObject(3);
                    if (base3 instanceof COSArray)
                    {
                        ab.dashArray = ((COSArray) base3).toFloatArray();
                    }
                }
            }
            else
            {
                ab.width = borderStyle.getWidth();
                if (borderStyle.getStyle().equals(PDBorderStyleDictionary.STYLE_DASHED))
                {
                    ab.dashArray = borderStyle.getDashStyle().getDashArray();
                }
                if (borderStyle.getStyle().equals(PDBorderStyleDictionary.STYLE_UNDERLINE))
                {
                    ab.underline = true;
                }
            }
            if (ab.dashArray != null)
            {
                boolean allZero = true;
                for (float f : ab.dashArray)
                {
                    if (Float.compare(f, 0) != 0)
                    {
                        allZero = false;
                        break;
                    }
                }
                if (allZero)
                {
                    ab.dashArray = null;
                }
            }
            return ab;
        }
    }