Example usage for java.io RandomAccessFile length

Introduction

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

Prototype

public native long length() throws IOException;

Source Link

Document

Returns the length of this file.

Usage

From source file:com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheckTest.java

@Test
public void testWrongSeparatorLength() throws Exception {
    NewlineAtEndOfFileCheck check = new NewlineAtEndOfFileCheck();
    final DefaultConfiguration checkConfig = createCheckConfig(NewlineAtEndOfFileCheck.class);
    check.configure(checkConfig);//www  .java 2s .  c  o  m

    Method method = NewlineAtEndOfFileCheck.class.getDeclaredMethod("endsWithNewline", RandomAccessFile.class);
    method.setAccessible(true);
    RandomAccessFile file = mock(RandomAccessFile.class);
    when(file.length()).thenReturn(2000000L);
    try {
        method.invoke(new NewlineAtEndOfFileCheck(), file);
    } catch (InvocationTargetException ex) {
        assertTrue(ex.getCause() instanceof IOException);
        if (System.getProperty("os.name").toLowerCase(ENGLISH).startsWith("windows")) {
            assertEquals("Unable to read 2 bytes, got 0", ex.getCause().getMessage());
        } else {
            assertEquals("Unable to read 1 bytes, got 0", ex.getCause().getMessage());
        }
    }
}

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From source file:org.apache.tajo.storage.http.ExampleHttpServerHandler.java

private void processGet(ChannelHandlerContext context, FullHttpRequest request) {
    try {//from  ww  w  .  j a va2  s  . c  o  m
        File file = getRequestedFile(request.getUri());

        RandomAccessFile raf = new RandomAccessFile(file, "r");
        long fileLength = raf.length();

        HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
        HttpHeaders.setContentLength(response, fileLength);
        setContentTypeHeader(response, file);

        context.write(response);

        context.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength));

        // Write the end marker.
        ChannelFuture future = context.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
        future.addListener(ChannelFutureListener.CLOSE);

    } catch (IOException | URISyntaxException e) {
        context.writeAndFlush(getBadRequest(e.getMessage()));
    }
}

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From source file:com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck.java

/**
 * Checks whether the content provided by the Reader ends with the platform
 * specific line separator.// w w w .  java 2 s .  c o  m
 * @param randomAccessFile The reader for the content to check
 * @return boolean Whether the content ends with a line separator
 * @throws IOException When an IO error occurred while reading from the
 *         provided reader
 */
private boolean endsWithNewline(RandomAccessFile randomAccessFile) throws IOException {
    final int len = lineSeparator.length();
    if (randomAccessFile.length() < len) {
        return false;
    }
    randomAccessFile.seek(randomAccessFile.length() - len);
    final byte[] lastBytes = new byte[len];
    final int readBytes = randomAccessFile.read(lastBytes);
    if (readBytes != len) {
        throw new IOException("Unable to read " + len + " bytes, got " + readBytes);
    }
    return lineSeparator.matches(lastBytes);
}

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From source file:com.tcl.lzhang1.mymusic.MusicUtil.java

/**
 * get the music info//  w ww. ja v  a  2s  .c o  m
 * 
 * @param musicFile
 * @return
 */
public static SongModel getMusicInfo(File musicFile) {
    SongModel model = new SongModel();
    // retrun null if music file is null or is or directory
    if (musicFile == null || !musicFile.isFile()) {
        return null;
    }

    byte[] buf = new byte[128];
    try {
        Log.d(LOG_TAG, "process music file{" + musicFile.getAbsolutePath() + "}");
        // tag_v1
        RandomAccessFile music = new RandomAccessFile(musicFile, "r");

        music.seek(music.length() - 128);
        music.read(buf);// read tag to buffer
        // tag_v2
        byte[] header = new byte[10];
        music.seek(0);
        music.read(header, 0, 10);
        // if ("ID3".equalsIgnoreCase(new String(header, 0, 3))) {
        // int ID3V2_frame_size = (int) (header[6] & 0x7F) * 0x200000
        // | (int) (header[7] & 0x7F) * 0x400
        // | (int) (header[8] & 0x7F) * 0x80
        // | (int) (header[9] & 0x7F);
        // byte[] FrameHeader = new byte[4];
        // music.seek(ID3V2_frame_size + 10);
        // music.read(FrameHeader, 0, 4);
        // model = getTimeInfo(FrameHeader, ID3V2_frame_size, musicFile);
        // } else {
        // byte[] FrameHeader = new byte[4];
        // music.read(FrameHeader, 0, 4);
        // model = getTimeInfo(FrameHeader, 0, musicFile);
        // }

        music.close();// close file
        // check length
        // if (buf.length != 128) {
        // throw new
        // ErrorMusicLength(String.format("error music info length, length is:%i",
        // buf.length));
        // }
        //
        // if (!"TAG".equalsIgnoreCase(new String(buf, 0, 3))) {
        // throw new UnknownTagException("unknown tag exception");
        // }
        String songName = null;
        // try {
        // songName = new String(buf, 3, 30, "gbk").trim();
        // } catch (UnsupportedEncodingException e) {
        // // TODO: handle exception
        // e.printStackTrace();
        // songName = new String(buf, 3, 30).trim();
        // }
        String singerName = "";
        // try {
        // singerName = new String(buf, 33, 30, "gbk").trim();
        // } catch (UnsupportedEncodingException e) {
        // // TODO: handle exception
        // singerName = new String(buf, 33, 30).trim();
        // }
        String ablum = "";
        // try {
        // ablum = new String(buf, 63, 30, "gbk").trim();
        // } catch (UnsupportedEncodingException e) {
        // // TODO: handle exception
        // ablum = new String(buf, 63, 30).trim();
        // }
        String year = "";
        // try {
        // year = new String(buf, 93, 4, "gbk").trim();
        // } catch (UnsupportedEncodingException e) {
        // year = new String(buf, 93, 4).trim();
        // // TODO: handle exception
        // }

        String reamrk = "";
        ContentResolver contentResolver = sContext.getContentResolver();
        Cursor cursor = contentResolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, "_data=?",
                new String[] { musicFile.getAbsolutePath() }, null);
        cursor.moveToFirst();
        if (cursor != null && cursor.getCount() != 0) {
            try {
                if (TextUtils.isEmpty(songName)) {
                    songName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.TITLE));
                    singerName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.ARTIST));
                    ablum = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.ALBUM));
                    year = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.YEAR));
                }

                long secs = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DURATION));
                model.setTime(secs);
                secs /= 1000;
                model.setHours((int) secs / 3600);
                model.setMinutes(((int) secs % 3600) / 60);
                model.setSeconds(((int) secs % 3600) % 60);
                cursor.close();
            } catch (CursorIndexOutOfBoundsException e) {
                // TODO: handle exception
                if (null != cursor) {
                    cursor.close();
                    cursor = null;
                }
                Log.d(LOG_TAG, "CursorIndexOutOfBoundsException:" + e.getMessage());
                try {
                    songName = new String(buf, 3, 30, "gbk").trim();
                } catch (UnsupportedEncodingException e0) {
                    // TODO: handle exception
                    e.printStackTrace();
                    songName = new String(buf, 3, 30).trim();
                }
                try {
                    singerName = new String(buf, 33, 30, "gbk").trim();
                } catch (UnsupportedEncodingException e1) {
                    // TODO: handle exception
                    singerName = new String(buf, 33, 30).trim();
                }
                try {
                    ablum = new String(buf, 63, 30, "gbk").trim();
                } catch (UnsupportedEncodingException e2) {
                    // TODO: handle exception
                    ablum = new String(buf, 63, 30).trim();
                }
                try {
                    year = new String(buf, 93, 4, "gbk").trim();
                } catch (UnsupportedEncodingException e3) {
                    year = new String(buf, 93, 4).trim();
                    // TODO: handle exception
                }

                try {
                    reamrk = new String(buf, 97, 28, "gbk").trim();
                } catch (UnsupportedEncodingException e4) {
                    // TODO: handle exception
                    reamrk = new String(buf, 97, 28).trim();
                }

            }
        }

        //

        // get the time len

        model.setSongName(songName);
        model.setSingerName(singerName);
        model.setAblumName(ablum);
        model.setFile(musicFile.getAbsolutePath());
        model.setRemark("");
        Log.d(LOG_TAG, String.format("scaned music file[%s],album name[%s],song name[%s],singer name[%s]",
                model.getFile(), model.getAblumName(), model.getSingerName(), model.getSingerName()));

        mSongs.add(model);

        return model;
    } catch (IOException e) {
        // TODO: handle exception
        e.printStackTrace();
    }
    return model;
}

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From source file:org.apache.jackrabbit.oak.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 ww .  j  a v a  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 = 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>
 * ).//from  w w  w .j  a  va2  s .  c  o  m
 * 
 * @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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From source file:org.openoverlayrouter.noroot.logActivity.java

public void refresh() {

    StringBuffer contents = new StringBuffer();

    final StringBuffer fixedContents = contents;

    try {/*from www.  j a v  a 2s .c o m*/
        RandomAccessFile logFile = new RandomAccessFile(log_file, "r");
        if (logFile.length() > maxReadBytes) {
            logFile.seek(logFile.length() - maxReadBytes);
        }
        String currentLine = logFile.readLine();
        while (currentLine != null) {

            if (currentLine != null) {
                contents.append(currentLine);
                contents.append('\n');
            }
            currentLine = logFile.readLine();
        }
        try {
            if (logFile != null) {
                logFile.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {

    }

    mHandler.post(new Runnable() {
        public void run() {

            // Put the file contents into the TextView
            TextView log = (TextView) llLayout.findViewById(R.id.logView);
            log.setText(fixedContents);

            // Auto scroll to the bottom
            final ScrollView scroll = (ScrollView) llLayout.findViewById(R.id.scrollView1);
            scroll.post(new Runnable() {
                public void run() {
                    scroll.fullScroll(View.FOCUS_DOWN);
                }
            });
            if (myDialog != null) {
                myDialog.dismiss();
                myDialog = null;
            }
        }
    });
}

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From source file:com.liferay.faces.bridge.renderkit.primefaces.internal.PrimeFacesFileItem.java

public byte[] get() {

    byte[] bytes = null;

    try {/*w ww .  jav a  2 s  . co m*/
        File file = new File(uploadedFile.getAbsolutePath());

        if (file.exists()) {
            RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
            bytes = new byte[(int) randomAccessFile.length()];
            randomAccessFile.readFully(bytes);
            randomAccessFile.close();
            file.delete();
        }
    } catch (Exception e) {
        logger.error(e);
    }

    return bytes;
}

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From source file:ch.cyberduck.core.io.FileBuffer.java

@Override
public synchronized int write(final byte[] chunk, final Long offset) throws IOException {
    final RandomAccessFile file = random();
    file.seek(offset);/*ww w .  java2s  .  c  o m*/
    file.write(chunk, 0, chunk.length);
    length = Math.max(length, file.length());
    return chunk.length;
}

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From source file:se.kth.ssvl.tslab.wsn.service.bpf.ActionReceiver.java

@Override
public void bundleReceived(Bundle bundle) {
    Log.i(TAG, "Received bundle! Reading:");
    switch (bundle.payload().location()) {
    case DISK:/* w  w w  .j a v  a  2s  .  co  m*/
        RandomAccessFile f = null;
        try {
            f = new RandomAccessFile(bundle.payload().file(), "r");
            byte[] buffer = new byte[(int) f.length()];
            f.read(buffer);
            Log.i(TAG, new String(buffer));
        } catch (FileNotFoundException e) {
            Log.e(TAG, "Payload should be in file: " + bundle.payload().file().getAbsolutePath()
                    + ". But did not exist!");
        } catch (Exception e) {
            Log.e(TAG, e.getMessage());
        } finally {
            try {
                f.close();
            } catch (IOException e) {
                Log.e(TAG, e.getMessage());
            }
        }
        break;
    case MEMORY:
        try {
            Log.i(TAG, new String(bundle.payload().memory_buf()));
        } catch (BundleLockNotHeldByCurrentThread e) {
            e.printStackTrace();
        }
        break;
    default:
        Log.w(TAG, "The bundle was neither stored in disk nor memory");
    }
}

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