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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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 = (COSArray) annot.getItem(COSName.QUADPOINTS);
if (quadPoints != null)
{
return quadPoints.toFloatArray();
}
else
{
return null; // Should never happen as this is a required item
}
}
}