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Open Source (LGPL) JavaFX PDF Viewer for NetBeans plugin

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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * ImageInputStreamFileBuffer.java
 * ---------------
 */

package org.jpedal.io;

import java.io.IOException;
import javax.imageio.stream.ImageInputStream;

import org.jpedal.utils.LogWriter;
import org.jpedal.utils.repositories.FastByteArrayOutputStream;

public class ImageInputStreamFileBuffer implements RandomAccessBuffer {

    private static final String fileName = "";

    final ImageInputStream iis;

    @SuppressWarnings("UnusedDeclaration")
    public ImageInputStreamFileBuffer(final ImageInputStream iis) {
        this.iis = iis;
    }

    @Override
    public long getFilePointer() throws IOException {
        return iis.getStreamPosition();
    }

    @Override
    public void seek(final long pos) throws IOException {
        iis.seek(pos);
    }

    @Override
    public int read() throws IOException {
        return iis.read();
    }

    @Override
    public String readLine() throws IOException {
        return iis.readLine();
    }

    @Override
    public long length() throws IOException {
        return iis.length();
    }

    @Override
    public void close() throws IOException {
        iis.close();
    }

    @Override
    public int read(final byte[] b) throws IOException {
        return iis.read(b);
    }

    @Override
    public byte[] getPdfBuffer() {

        byte[] pdfByteArray = null;
        final FastByteArrayOutputStream os;

        try {
            os = new FastByteArrayOutputStream();

            // Download buffer
            final byte[] buffer = new byte[4096];

            // Download the PDF document
            int read;
            while ((read = iis.read(buffer)) != -1) {
                os.write(buffer, 0, read);
            }

            // Copy output stream to byte array
            pdfByteArray = os.toByteArray();

        } catch (final IOException e) {
            LogWriter.writeLog("[PDF] Exception " + e + " getting byte[] for " + fileName);
        }

        return pdfByteArray;
    }
}