# FDFAnnotationTextMarkup.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.fdf;

    import java.io.IOException;

    import org.apache.pdfbox.cos.COSArray;
    import org.apache.pdfbox.cos.COSDictionary;
    import org.apache.pdfbox.cos.COSName;
    import org.w3c.dom.Element;

    /**
     * This abstract class is used as a superclass for the different FDF annotations with text markup attributes.
     *
     * @author Johanneke Lamberink
     */
    public abstract class FDFAnnotationTextMarkup extends FDFAnnotation
    {
        /**
         * Default constructor.
         */
        public FDFAnnotationTextMarkup()
        {
            super();
        }

        /**
         * Constructor.
         *
         * @param a An existing FDF Annotation.
         */
        public FDFAnnotationTextMarkup(COSDictionary a)
        {
            super(a);
        }

        /**
         * Constructor.
         *
         * @param element An XFDF element.
         *
         * @throws IOException If there is an error extracting information from the element.
         */
        public FDFAnnotationTextMarkup(Element element) throws IOException
        {
            super(element);

            String coords = element.getAttribute("coords");
            if (coords == null || coords.isEmpty())
            {
                throw new IOException("Error: missing attribute 'coords'");
            }
            String[] coordsValues = coords.split(",");
            if (coordsValues.length < 8)
            {
                throw new IOException("Error: too little numbers in attribute 'coords'");
            }
            float[] values = new float[coordsValues.length];
            for (int i = 0; i < coordsValues.length; i++)
            {
                values[i] = Float.parseFloat(coordsValues[i]);
            }
            setCoords(values);
        }

        /**
         * Set the coordinates of individual words or group of words.
         *
         * The quadliterals shall encompasses a word or group of contiguous words in the text underlying the annotation. The
         * coordinates for each quadrilateral shall be given in the order x1 y1 x2 y2 x3 y3 x4 y4.
         *
         * @param coords an array of 8 􏰍 n numbers specifying the coordinates of n quadrilaterals.
         */
        public void setCoords(float[] coords)
        {
            COSArray newQuadPoints = new COSArray();
            newQuadPoints.setFloatArray(coords);
            annot.setItem(COSName.QUADPOINTS, newQuadPoints);
        }

        /**
         * Get the coordinates of individual words or group of words.
         *
         * @see #setCoords(float[])
         * @return the array of 8 􏰍 n numbers specifying the coordinates of n quadrilaterals.
         */
        public float[] getCoords()
        {
            COSArray quadPoints = annot.getCOSArray(COSName.QUADPOINTS);
            if (quadPoints != null)
            {
                return quadPoints.toFloatArray();
            }
            else
            {
                return null; // Should never happen as this is a required item
            }
        }

    }