Examples of javax.imageio.stream.ImageInputStream.mark()

Class javax.imageio.stream.ImageInputStream

Examples of javax.imageio.stream.ImageInputStream.mark()

javax.imageio.stream.ImageInputStream.mark()
Marks a position in the stream to be returned to by a subsequent call to reset. Unlike a standard InputStream, all ImageInputStreams support marking. Additionally, calls to mark and reset may be nested arbitrarily.
Unlike the mark methods declared by the Reader and InputStream interfaces, no readLimit parameter is used. An arbitrary amount of data may be read following the call to mark.
The bit position used by the readBits method is saved and restored by each pair of calls to mark and reset.
Note that it is valid for an ImageReader to call flushBefore as part of a read operation. Therefore, if an application calls mark prior to passing that stream to an ImageReader, the application should not assume that the marked position will remain valid after the read operation has completed.

                // Perform mark/reset as a defensive measure
                // even though plug-ins are supposed to take
                // care of it.
                boolean canDecode = false;
                if (stream != null) {
                    stream.mark();
                }
                canDecode = spi.canDecodeInput(input);
                if (stream != null) {
                    stream.reset();
                }

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    }


    @Override
    public boolean canDecodeInput(Object source) throws IOException {
        ImageInputStream markable = (ImageInputStream) source;
        markable.mark();


        byte[] signature = new byte[8];
        markable.seek(0);


        int nBytes = markable.read(signature, 0, 8);

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    @Override
    public boolean canDecodeInput(Object source) throws IOException {
        ImageInputStream markable = (ImageInputStream) source;
        try {
            markable.mark();


            byte[] signature = new byte[3];
            markable.seek(0);
            markable.read(signature, 0, 3);
            markable.reset();

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        ByteArrayOutputStream iccStream = null;
        
        Source src = session.needSource(info.getOriginalURI());
        ImageInputStream in = ImageUtil.needImageInputStream(src);
        JPEGFile jpeg = new JPEGFile(in);
        in.mark();
        try {
            outer:
            while (true) {
                int reclen;
                int segID = jpeg.readMarkerSegment();

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                case SOFA: //progressive (since PDF 1.3)
                    sofType = segID;
                    if (log.isTraceEnabled()) {
                        log.trace("SOF: " + Integer.toHexString(sofType));
                    }
                    in.mark();
                    try {
                        reclen = jpeg.readSegmentLength();
                        in.skipBytes(1); //data precision
                        in.skipBytes(2); //height
                        in.skipBytes(2); //width

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                        in.reset();
                    }
                    in.skipBytes(reclen);
                    break;
                case APP2: //ICC (see ICC1V42.pdf)
                    in.mark();
                    try {
                        reclen = jpeg.readSegmentLength();
                        // Check for ICC profile
                        byte[] iccString = new byte[11];
                        in.readFully(iccString);

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                        in.reset();
                    }
                    in.skipBytes(reclen);
                    break;
                case APPE: //Adobe-specific (see 5116.DCT_Filter.pdf)
                    in.mark();
                    try {
                        reclen = jpeg.readSegmentLength();
                        // Check for Adobe header
                        byte[] adobeHeader = new byte[5];
                        in.readFully(adobeHeader);

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        try {
            Iterator iter = ImageIO.getImageReaders(imgStream);
            while (iter.hasNext()) {
                ImageReader reader = (ImageReader)iter.next();
                try {
                    imgStream.mark();
                    ImageReadParam param = reader.getDefaultReadParam();
                    reader.setInput(imgStream, false, ignoreMetadata);
                    final int pageIndex = ImageUtil.needPageIndexFromURI(info.getOriginalURI());
                    try {
                        if (ImageFlavor.BUFFERED_IMAGE.equals(this.targetFlavor)) {

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        IOException firstIOException = null;
        IIOMetadata iiometa = null;
        ImageSize size = null;
        String mime = null;
        while (iter.hasNext()) {
            in.mark();
            
            ImageReader reader = (ImageReader)iter.next();
            try {
                reader.setInput(ImageUtil.ignoreFlushing(in), true, false);
                final int imageIndex = 0;

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             * buffer created in createChannelDataInput(boolean), the buffer created here is unlikely to be used for
             * the reading process after the recognition of the file format.
             */
            final ImageInputStream in = getStorageAs(ImageInputStream.class);
            if (in != null) {
                in.mark();
                final byte[] buffer = new byte[MINIMAL_BUFFER_SIZE];
                final int n = in.read(buffer);
                in.reset();
                if (n >= 1) {
                    asByteBuffer = ByteBuffer.wrap(buffer).order(in.getByteOrder());

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