Example usage for java.io RandomAccessFile readFully

Introduction

In this page you can find the example usage for java.io RandomAccessFile readFully.

Prototype

public final void readFully(byte b[]) throws IOException 

Source Link

Document

Reads b.length bytes from this file into the byte array, starting at the current file pointer.

Usage

From source file:be.roots.taconic.pricingguide.util.iTextUtil.java

public static byte[] embedFont(byte[] pdf, String fontFileName, String fontName)
        throws IOException, DocumentException {

    try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
        // the font file
        RandomAccessFile raf = new RandomAccessFile(fontFileName, "r");
        byte fontfile[] = new byte[(int) raf.length()];
        raf.readFully(fontfile);
        raf.close();/*from  ww  w  .  java2  s  .  co  m*/
        // create a new stream for the font file
        PdfStream stream = new PdfStream(fontfile);
        stream.flateCompress();
        stream.put(PdfName.LENGTH1, new PdfNumber(fontfile.length));
        // create a reader object
        PdfReader reader = new PdfReader(pdf);
        int n = reader.getXrefSize();
        PdfObject object;
        PdfDictionary font;
        PdfStamper stamper = new PdfStamper(reader, baos);
        PdfName fontname = new PdfName(fontName);
        for (int i = 0; i < n; i++) {
            object = reader.getPdfObject(i);
            if (object == null || !object.isDictionary())
                continue;
            font = (PdfDictionary) object;
            if (PdfName.FONTDESCRIPTOR.equals(font.get(PdfName.TYPE1))
                    && fontname.equals(font.get(PdfName.FONTNAME))) {
                PdfIndirectObject objref = stamper.getWriter().addToBody(stream);
                font.put(PdfName.FONTFILE2, objref.getIndirectReference());
            }
        }
        stamper.close();
        reader.close();
        return baos.toByteArray();
    }
}

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From source file:org.fusesource.meshkeeper.util.internal.FileSupport.java

static public byte[] read(File file, long pos, int length) throws IOException {
    RandomAccessFile is = new RandomAccessFile(file, "r");
    try {//  w  w  w .  ja  v a2 s .c o  m
        long remaining = is.length() - pos;
        if (remaining < 0) {
            remaining = 0;
        }
        byte rc[] = new byte[(int) Math.min(remaining, length)];
        if (rc.length == 0) {
            return rc;
        }
        is.seek(pos);
        is.readFully(rc);
        return rc;
    } finally {
        is.close();
    }
}

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From source file:se.bitcraze.crazyflielib.bootloader.Bootloader.java

public static byte[] readFile(File file) throws IOException {
    byte[] fileData = new byte[(int) file.length()];
    Logger logger = LoggerFactory.getLogger("Bootloader");
    logger.debug("readFile: " + file.getName() + ", size: " + file.length());
    RandomAccessFile raf = null;
    try {/*from   w  w  w.ja va  2 s  .c om*/
        raf = new RandomAccessFile(file.getAbsoluteFile(), "r");
        raf.readFully(fileData);
    } finally {
        if (raf != null) {
            try {
                raf.close();
            } catch (IOException ioe) {
                logger.error(ioe.getMessage());
            }
        }
    }
    return fileData;
}

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From source file:org.gcaldaemon.core.sendmail.SendMail.java

private static final String readContent(RandomAccessFile raf) throws Exception {
    String content = null;//from  ww  w  .ja  v a2 s. com
    int len = Math.min((int) raf.length(), 500);
    byte[] bytes = new byte[len];
    raf.seek(0);
    raf.readFully(bytes);
    if (bytes[0] == -17 && bytes[1] == -69 && bytes[2] == -65) {

        // UTF-8 header found
        log.debug("File encoding is 'UTF-8'.");
        bytes = new byte[(int) raf.length() - 3];
        raf.seek(3);
        raf.readFully(bytes);
        content = StringUtils.decodeToString(bytes, StringUtils.UTF_8).trim();
    } else {

        // Autodetect encoding
        String header = StringUtils.decodeToString(bytes, StringUtils.US_ASCII).toUpperCase().replace(':', '=');
        String encoding = null;
        int pos = header.indexOf("ENCODING=");
        if (pos != -1) {
            int end = endOf(header, pos + 10);
            if (end != -1) {
                encoding = header.substring(pos + 9, end);
                encoding = encoding.replace('\'', ' ');
                encoding = encoding.replace('\"', ' ');
                encoding = encoding.trim();
            }
        }

        // Check XML-encoding
        if (encoding == null) {
            pos = header.indexOf("CHARSET=");
            if (pos != -1) {
                int end = endOf(header, pos + 10);
                if (end != -1) {
                    encoding = header.substring(pos + 8, end);
                    encoding = encoding.replace('\'', ' ');
                    encoding = encoding.replace('\"', ' ');
                    encoding = encoding.trim();
                }
            }
        }

        // Convert file encoding to Java encoding
        if (encoding == null) {
            encoding = Charset.defaultCharset().name();
        } else {
            if (encoding.equals("UTF8")) {
                encoding = StringUtils.UTF_8;
            }
        }
        log.debug("File encoding is '" + encoding + "'.");
        bytes = new byte[(int) raf.length()];
        raf.seek(0);
        raf.readFully(bytes);
        content = StringUtils.decodeToString(bytes, encoding).trim();
    }
    return content;
}

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From source file:com.sangupta.snowpack.SnowpackRecover.java

/**
 * Try and recover from a chunk./*from www  .  j  a v a  2 s .c o m*/
 * 
 * @param chunkID
 * @param chunkFile
 * @param metadataDB 
 * @return
 * @throws IOException 
 */
private static ChunkInfo recoverChunkInfo(final int chunkID, final File chunkFile,
        SnowpackMetadataDB metadataDB) throws IOException {
    // open the file for reading
    RandomAccessFile raf = new RandomAccessFile(chunkFile, "r");

    // read the length first
    int nameLength, length, terminator, headerLength, numFiles = 0;
    long offset;

    List<FlakeMetadata> metas = new ArrayList<FlakeMetadata>();

    try {
        while (raf.getFilePointer() < raf.length()) {
            offset = raf.getFilePointer();

            nameLength = raf.readInt();
            byte[] name = new byte[nameLength];
            raf.readFully(name);

            length = raf.readInt();
            raf.readLong();
            raf.skipBytes((int) length);

            terminator = raf.readByte();
            if (terminator != 0) {
                System.out.print(" invalid descriptor found...");
                return null;
            }

            headerLength = 4 + name.length + 4 + 8;

            numFiles++;

            metas.add(new FlakeMetadata(new String(name), nameLength, chunkID, offset, headerLength));
        }
    } finally {
        raf.close();
    }

    // all clear for recovery

    // save all metadata in new DB
    for (FlakeMetadata meta : metas) {
        metadataDB.save(meta);
    }

    // return chunk info
    ChunkInfo info = new ChunkInfo();
    info.chunkID = chunkID;
    info.numFiles = numFiles;
    info.writePointer = -1;

    return info;
}

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From source file:com.owncloud.android.utils.EncryptionUtils.java

/**
 * @param file               file do crypt
 * @param encryptionKeyBytes key, either from metadata or {@link EncryptionUtils#generateKey()}
 * @param iv                 initialization vector, either from metadata or {@link EncryptionUtils#randomBytes(int)}
 * @return encryptedFile with encryptedBytes and authenticationTag
 *//*from   ww w . j  a v  a2 s  .c  o  m*/
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public static EncryptedFile encryptFile(File file, byte[] encryptionKeyBytes, byte[] iv)
        throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, NoSuchPaddingException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException, IOException {

    Cipher cipher = Cipher.getInstance(AES_CIPHER);

    Key key = new SecretKeySpec(encryptionKeyBytes, AES);

    GCMParameterSpec spec = new GCMParameterSpec(128, iv);
    cipher.init(Cipher.ENCRYPT_MODE, key, spec);

    RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
    byte[] fileBytes = new byte[(int) randomAccessFile.length()];
    randomAccessFile.readFully(fileBytes);

    byte[] cryptedBytes = cipher.doFinal(fileBytes);
    String authenticationTag = encodeBytesToBase64String(
            Arrays.copyOfRange(cryptedBytes, cryptedBytes.length - (128 / 8), cryptedBytes.length));

    return new EncryptedFile(cryptedBytes, authenticationTag);
}

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From source file:com.owncloud.android.utils.EncryptionUtils.java

/**
 * @param file               encrypted file
 * @param encryptionKeyBytes key from metadata
 * @param iv                 initialization vector from metadata
 * @param authenticationTag  authenticationTag from metadata
 * @return decrypted byte[]//  w  w  w.j a  va  2s. com
 */
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public static byte[] decryptFile(File file, byte[] encryptionKeyBytes, byte[] iv, byte[] authenticationTag)
        throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, NoSuchPaddingException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException, IOException {

    Cipher cipher = Cipher.getInstance(AES_CIPHER);
    Key key = new SecretKeySpec(encryptionKeyBytes, AES);
    GCMParameterSpec spec = new GCMParameterSpec(128, iv);
    cipher.init(Cipher.DECRYPT_MODE, key, spec);

    RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
    byte[] fileBytes = new byte[(int) randomAccessFile.length()];
    randomAccessFile.readFully(fileBytes);

    // check authentication tag
    byte[] extractedAuthenticationTag = Arrays.copyOfRange(fileBytes, fileBytes.length - (128 / 8),
            fileBytes.length);

    if (!Arrays.equals(extractedAuthenticationTag, authenticationTag)) {
        throw new SecurityException("Tag not correct");
    }

    return cipher.doFinal(fileBytes);
}

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From source file:org.socialnetlib.android.AppdotnetApi.java

private static byte[] readFile(File file) throws IOException {
    // Open file//from   www.ja v a  2  s  .co m
    RandomAccessFile f = new RandomAccessFile(file, "r");

    try {
        // Get and check length
        long longlength = f.length();
        int length = (int) longlength;
        if (length != longlength)
            throw new IOException("File size >= 2 GB");

        // Read file and return data
        byte[] data = new byte[length];
        f.readFully(data);
        return data;
    } finally {
        f.close();
    }
}

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From source file:org.apache.jackrabbit.oak.plugins.segment.file.TarReader.java

/**
 * Scans through the tar file, looking for all segment entries.
 *
 * @throws IOException if the tar file could not be read
 *//*from w  w  w.j a  va  2  s  .  c o  m*/
private static void recoverEntries(File file, RandomAccessFile access, LinkedHashMap<UUID, byte[]> entries)
        throws IOException {
    byte[] header = new byte[BLOCK_SIZE];
    while (access.getFilePointer() + BLOCK_SIZE <= access.length()) {
        // read the tar header block
        access.readFully(header);

        // compute the header checksum
        int sum = 0;
        for (int i = 0; i < BLOCK_SIZE; i++) {
            sum += header[i] & 0xff;
        }

        // identify possible zero block
        if (sum == 0 && access.getFilePointer() + 2 * BLOCK_SIZE == access.length()) {
            return; // found the zero blocks at the end of the file
        }

        // replace the actual stored checksum with spaces for comparison
        for (int i = 148; i < 148 + 8; i++) {
            sum -= header[i] & 0xff;
            sum += ' ';
        }

        byte[] checkbytes = String.format("%06o\0 ", sum).getBytes(UTF_8);
        for (int i = 0; i < checkbytes.length; i++) {
            if (checkbytes[i] != header[148 + i]) {
                log.warn("Invalid entry checksum at offset {} in tar file {}, skipping...",
                        access.getFilePointer() - BLOCK_SIZE, file);
            }
        }

        // The header checksum passes, so read the entry name and size
        ByteBuffer buffer = ByteBuffer.wrap(header);
        String name = readString(buffer, 100);
        buffer.position(124);
        int size = readNumber(buffer, 12);
        if (access.getFilePointer() + size > access.length()) {
            // checksum was correct, so the size field should be accurate
            log.warn("Partial entry {} in tar file {}, ignoring...", name, file);
            return;
        }

        Matcher matcher = NAME_PATTERN.matcher(name);
        if (matcher.matches()) {
            UUID id = UUID.fromString(matcher.group(1));

            String checksum = matcher.group(3);
            if (checksum != null || !entries.containsKey(id)) {
                byte[] data = new byte[size];
                access.readFully(data);

                // skip possible padding to stay at block boundaries
                long position = access.getFilePointer();
                long remainder = position % BLOCK_SIZE;
                if (remainder != 0) {
                    access.seek(position + (BLOCK_SIZE - remainder));
                }

                if (checksum != null) {
                    CRC32 crc = new CRC32();
                    crc.update(data);
                    if (crc.getValue() != Long.parseLong(checksum, 16)) {
                        log.warn("Checksum mismatch in entry {} of tar file {}, skipping...", name, file);
                        continue;
                    }
                }

                entries.put(id, data);
            }
        } else if (!name.equals(file.getName() + ".idx")) {
            log.warn("Unexpected entry {} in tar file {}, skipping...", name, file);
            long position = access.getFilePointer() + size;
            long remainder = position % BLOCK_SIZE;
            if (remainder != 0) {
                position += BLOCK_SIZE - remainder;
            }
            access.seek(position);
        }
    }
}

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From source file:net.sf.zekr.common.resource.QuranText.java

/**
 * The private constructor, which loads the whole Quran text from file into memory (<code>quranText</code>
 * )./*w  ww  . ja  v  a  2  s  . c  om*/
 * 
 * @param textType can be either UTHMANI_MODE or SIMPLE_MODE
 * @throws IOException
 */
protected QuranText(int textType) throws IOException {
    mode = textType;
    String qFile = ApplicationPath.SIMPLE_QURAN_TEXT_FILE;
    if (textType == UTHMANI_MODE) {
        qFile = ApplicationPath.UTHMANI_QURAN_TEXT_FILE;
    }

    RandomAccessFile raf = new RandomAccessFile(qFile, "r");
    byte[] buf = new byte[(int) raf.length()];
    raf.readFully(buf);
    rawText = new String(buf, config.getProps().getString("quran.text.encoding"));
    refineRawText();
    raf.close();
}

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