Java 类com.lowagie.text.pdf.RandomAccessFileOrArray 实例源码

项目：itext2 文件：TiffReadingTest.java

@Test
public void transparentTiffTest() throws IOException {
    InputStream inputStream = TiffReadingTest.class.getClassLoader().getResourceAsStream("gradient.tiff");
    byte[] data;

    try(ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream()) {
        int bytesRead;
        byte[] buffer = new byte[8192];

        while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) {
            byteOutputStream.write(buffer, 0, bytesRead);
        }

        data = byteOutputStream.toByteArray();
    }

    RandomAccessFileOrArray ra = new RandomAccessFileOrArray(data);
    int pages = TiffImage.getNumberOfPages(ra);

    for (int i = 1; i <= pages; i++) {
        Assert.assertNotNull(TiffImage.getTiffImage(ra, i));
    }
}

项目：MesquiteArchive 文件：TIFFDirectory.java

/**
 * Returns the number of image directories (subimages) stored in a
 * given TIFF file, represented by a <code>SeekableStream</code>.
 */
public static int getNumDirectories(RandomAccessFileOrArray stream)
throws IOException{
    long pointer = stream.getFilePointer(); // Save stream pointer

    stream.seek(0L);
    int endian = stream.readUnsignedShort();
    if (!isValidEndianTag(endian)) {
        throw new
        IllegalArgumentException("Bad endianness tag (not 0x4949 or 0x4d4d).");
    }
    boolean isBigEndian = (endian == 0x4d4d);
    int magic = readUnsignedShort(stream, isBigEndian);
    if (magic != 42) {
        throw new
        IllegalArgumentException("Bad magic number, should be 42.");
    }

    stream.seek(4L);
    long offset = readUnsignedInt(stream, isBigEndian);

    int numDirectories = 0;
    while (offset != 0L) {
        ++numDirectories;

        // EOFException means IFD was probably not properly terminated.
        try {
            stream.seek(offset);
            int entries = readUnsignedShort(stream, isBigEndian);
            stream.skip(12*entries);
            offset = readUnsignedInt(stream, isBigEndian);
        } catch(EOFException eof) {
            numDirectories--;
            break;
        }
    }

    stream.seek(pointer); // Reset stream pointer
    return numDirectories;
}

项目：itext2 文件：PdfTextExtractor.java

/**
 * Gets the content stream of a page.
 * @param pageNum   the page number of page you want get the content stream from
 * @return  a byte array with the content stream of a page
 * @throws IOException
 */
private byte[] getContentBytesForPage(int pageNum) throws IOException {
    RandomAccessFileOrArray f = reader.getSafeFile();
    byte[] contentBytes = reader.getPageContent(pageNum, f);
    f.close();
    return contentBytes;
}

项目：itext2 文件：PdfContentReaderTool.java

/**
 * Writes information about a specific page from PdfReader to the specified output stream.
 * @since 2.1.5
 * @param reader    the PdfReader to read the page content from
 * @param pageNum   the page number to read
 * @param out       the output stream to send the content to
 * @throws IOException
 */
static public void listContentStreamForPage(PdfReader reader, int pageNum, PrintWriter out) throws IOException {
    out.println("==============Page " + pageNum + "====================");
    out.println("- - - - - Dictionary - - - - - -");
    PdfDictionary pageDictionary = reader.getPageN(pageNum);
    out.println(getDictionaryDetail(pageDictionary));
    out.println("- - - - - Content Stream - - - - - -");
    RandomAccessFileOrArray f = reader.getSafeFile();

    byte[] contentBytes = reader.getPageContent(pageNum, f);
    f.close();


    InputStream is = new ByteArrayInputStream(contentBytes);
    int ch;
    while ((ch = is.read()) != -1){
        out.print((char)ch);
    }

    out.println("- - - - - Text Extraction - - - - - -");
    PdfTextExtractor extractor = new PdfTextExtractor(reader);
    String extractedText = extractor.getTextFromPage(pageNum);
    if (extractedText.length() != 0)
        out.println(extractedText);
    else
        out.println("No text found on page " + pageNum);

    out.println();

}

项目：itext2 文件：TiffImage.java

/** Gets the number of pages the TIFF document has.
 * @param s the file source
 * @return the number of pages
 */    
public static int getNumberOfPages(RandomAccessFileOrArray s) {
    try {
        return TIFFDirectory.getNumDirectories(s);
    }
    catch (Exception e) {
        throw new ExceptionConverter(e);
    }
}

项目：itext2 文件：JBIG2Image.java

/**
 * Gets a byte array that can be used as a /JBIG2Globals,
 * or null if not applicable to the given jbig2.
 * @param   ra  an random access file or array
 * @return  a byte array
 */
public static byte[] getGlobalSegment(RandomAccessFileOrArray ra ) {
    try {
        JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
        sr.read();
        return sr.getGlobal(true);
    } catch (Exception e) {
        return null;
    }
}

项目：itext2 文件：JBIG2Image.java

/**
 * returns an Image representing the given page.
 * @param ra    the file or array containing the image
 * @param page  the page number of the image
 * @return  an Image object
 */
public static Image getJbig2Image(RandomAccessFileOrArray ra, int page) {
    if (page < 1)
           throw new IllegalArgumentException("The page number must be >= 1.");

    try {
        JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
        sr.read();
        JBIG2SegmentReader.JBIG2Page p = sr.getPage(page);
        Image img = new ImgJBIG2(p.pageBitmapWidth, p.pageBitmapHeight, p.getData(true), sr.getGlobal(true));
        return img;
    } catch (Exception e) {
        throw new ExceptionConverter(e);
    }
}

项目：itext2 文件：JBIG2Image.java

/***
 * Gets the number of pages in a JBIG2 image.
 * @param ra    a random acces file array containing a JBIG2 image
 * @return  the number of pages
 */
public static int getNumberOfPages(RandomAccessFileOrArray ra) {
    try {
        JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
        sr.read();
        return sr.numberOfPages();
    } catch (Exception e) {
        throw new ExceptionConverter(e);
    }
   }