Examples with MemoryCacheImageInputStream javax.imageio.stream.MemoryCacheImageInputStream used on opensource projects

Example 21 with MemoryCacheImageInputStream

use of javax.imageio.stream.MemoryCacheImageInputStream in project openj9 by eclipse.

the class J9DDRStructureStore method get.

/**
 * @param key
 * @return An InputStream open and positioned at the start of the J9DDR structure the blob associated with key.  null if key is not contained in the database
 * @throws IOException - if there is a problem retrieving the blob
 */
public ImageInputStream get(StructureKey key) throws IOException {
    String digest = keyMap.get(key);
    if (digest == null) {
        return null;
    }
    ZipFile zipFile = new ZipFile(getZipFile(key, digest));
    ZipEntry entry = zipFile.getEntry(getZipEntry(key, digest).getName());
    InputStream entryStream = zipFile.getInputStream(entry);
    byte[] buffer = new byte[1024];
    ByteArrayOutputStream output = new ByteArrayOutputStream((int) entry.getSize());
    while (true) {
        int bytesRead = entryStream.read(buffer);
        if (bytesRead == -1) {
            break;
        }
        output.write(buffer, 0, bytesRead);
    }
    zipFile.close();
    return new MemoryCacheImageInputStream(new ByteArrayInputStream(output.toByteArray()));
}

Example 22 with MemoryCacheImageInputStream

use of javax.imageio.stream.MemoryCacheImageInputStream in project spring-security-oauth by spring-projects.

the class SparklrController method photo.

@RequestMapping("/sparklr/photos/{id}")
public ResponseEntity<BufferedImage> photo(@PathVariable String id, HttpServletRequest request) throws Exception {
    InputStream photo = sparklrService.loadSparklrPhoto(id);
    if (photo == null) {
        throw new UnavailableException("The requested photo does not exist");
    }
    BufferedImage body;
    MediaType contentType = MediaType.IMAGE_JPEG;
    Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByMIMEType(contentType.toString());
    if (imageReaders.hasNext()) {
        ImageReader imageReader = imageReaders.next();
        ImageReadParam irp = imageReader.getDefaultReadParam();
        imageReader.setInput(new MemoryCacheImageInputStream(photo), true);
        body = imageReader.read(0, irp);
    } else {
        throw new HttpMessageNotReadableException("Could not find javax.imageio.ImageReader for Content-Type [" + contentType + "]");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_JPEG);
    request.setAttribute(HandlerMapping.PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE, Collections.singleton(MediaType.IMAGE_JPEG));
    return new ResponseEntity<BufferedImage>(body, headers, HttpStatus.OK);
}

Example 23 with MemoryCacheImageInputStream

use of javax.imageio.stream.MemoryCacheImageInputStream in project spring-security-oauth by spring-projects.

the class SparklrRedirectController method photo.

@RequestMapping("/sparklr/redirect/{id}")
public ResponseEntity<BufferedImage> photo(@PathVariable String id) throws Exception {
    InputStream photo = sparklrService.loadSparklrPhoto(id);
    if (photo == null) {
        throw new UnavailableException("The requested photo does not exist");
    }
    BufferedImage body;
    MediaType contentType = MediaType.IMAGE_JPEG;
    Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByMIMEType(contentType.toString());
    if (imageReaders.hasNext()) {
        ImageReader imageReader = imageReaders.next();
        ImageReadParam irp = imageReader.getDefaultReadParam();
        imageReader.setInput(new MemoryCacheImageInputStream(photo), true);
        body = imageReader.read(0, irp);
    } else {
        throw new HttpMessageNotReadableException("Could not find javax.imageio.ImageReader for Content-Type [" + contentType + "]");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_JPEG);
    return new ResponseEntity<BufferedImage>(body, headers, HttpStatus.OK);
}

Example 24 with MemoryCacheImageInputStream

use of javax.imageio.stream.MemoryCacheImageInputStream in project spring-security-oauth by spring-projects.

the class SparklrController method photo.

@RequestMapping("/sparklr/photos/{id}")
public ResponseEntity<BufferedImage> photo(@PathVariable String id) throws Exception {
    InputStream photo = sparklrService.loadSparklrPhoto(id);
    if (photo == null) {
        throw new UnavailableException("The requested photo does not exist");
    }
    BufferedImage body;
    MediaType contentType = MediaType.IMAGE_JPEG;
    Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByMIMEType(contentType.toString());
    if (imageReaders.hasNext()) {
        ImageReader imageReader = imageReaders.next();
        ImageReadParam irp = imageReader.getDefaultReadParam();
        imageReader.setInput(new MemoryCacheImageInputStream(photo), true);
        body = imageReader.read(0, irp);
    } else {
        throw new HttpMessageNotReadableException("Could not find javax.imageio.ImageReader for Content-Type [" + contentType + "]");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_JPEG);
    return new ResponseEntity<BufferedImage>(body, headers, HttpStatus.OK);
}

Example 25 with MemoryCacheImageInputStream

use of javax.imageio.stream.MemoryCacheImageInputStream in project pdfbox by apache.

the class LZWFilter method doLZWDecode.

private void doLZWDecode(InputStream encoded, OutputStream decoded, int earlyChange) throws IOException {
    List<byte[]> codeTable = new ArrayList<>();
    int chunk = 9;
    final MemoryCacheImageInputStream in = new MemoryCacheImageInputStream(encoded);
    long nextCommand;
    long prevCommand = -1;
    try {
        while ((nextCommand = in.readBits(chunk)) != EOD) {
            if (nextCommand == CLEAR_TABLE) {
                chunk = 9;
                codeTable = createCodeTable();
                prevCommand = -1;
            } else {
                if (nextCommand < codeTable.size()) {
                    byte[] data = codeTable.get((int) nextCommand);
                    byte firstByte = data[0];
                    decoded.write(data);
                    if (prevCommand != -1) {
                        checkIndexBounds(codeTable, prevCommand, in);
                        data = codeTable.get((int) prevCommand);
                        byte[] newData = Arrays.copyOf(data, data.length + 1);
                        newData[data.length] = firstByte;
                        codeTable.add(newData);
                    }
                } else {
                    checkIndexBounds(codeTable, prevCommand, in);
                    byte[] data = codeTable.get((int) prevCommand);
                    byte[] newData = Arrays.copyOf(data, data.length + 1);
                    newData[data.length] = data[0];
                    decoded.write(newData);
                    codeTable.add(newData);
                }
                chunk = calculateChunk(codeTable.size(), earlyChange);
                prevCommand = nextCommand;
            }
        }
    } catch (EOFException ex) {
        LOG.warn("Premature EOF in LZW stream, EOD code missing", ex);
    }
    decoded.flush();
}