Example usage for java.io FileInputStream getChannel

Introduction

In this page you can find the example usage for java.io FileInputStream getChannel.

Prototype

public FileChannel getChannel() 

Source Link

Document

Returns the unique java.nio.channels.FileChannel FileChannel object associated with this file input stream.

Usage

From source file:com.kappaware.logtrawler.MFile.java

/**
 * //from  w  w  w . j  av  a2  s  . c  om
 * @return   false is the file can't be opened, whatever is the reason
 * @throws IOException
 */
void open() throws IOException {
    try {
        Utils.assertNull(this.channel, "Channel must be null on open on %s", this.path);
        Utils.assertNull(this.reader, "Reader must be null on open on %s", this.path);
        FileInputStream fis = new FileInputStream(this.path.toFile());
        this.channel = fis.getChannel();
        this.channel.position(this.position);
        this.reader = new BufferedReader(new InputStreamReader(fis));
        // Need this, otherwise will be the oldest, so removed before used.
        this.lastAccessTime = System.currentTimeMillis();
        return;
    } catch (IOException e) {
        //log.error(String.format("Unable to open file '%s'", this.path), e);
        if (this.channel != null) {
            try {
                this.channel.close();
            } catch (IOException e1) {
            }
        }
        throw e;
    }
}

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From source file:net.ytbolg.mcxa.ImportOldMc.java

void fileChannelCopy(File s, File t) {

    FileInputStream fi = null;

    FileOutputStream fo = null;/*w w w.  j  a  va  2s.  c o m*/

    FileChannel in = null;

    FileChannel out = null;

    try {

        fi = new FileInputStream(s);

        fo = new FileOutputStream(t);

        in = fi.getChannel();//?

        out = fo.getChannel();//?

        in.transferTo(0, in.size(), out);//?in???out?

    } catch (IOException e) {

        e.printStackTrace();

    } finally {

        try {

            fi.close();

            in.close();

            fo.close();

            out.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

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From source file:com.amazonaws.internal.ResettableInputStream.java

/**
 * @param file/*w  w  w.j a  v a  2 s .  c  o m*/
 *            can be null if not known
 */
private ResettableInputStream(FileInputStream fis, File file) throws IOException {
    super(fis);
    this.file = file;
    this.fis = fis;
    this.fileChannel = fis.getChannel();
    this.markPos = fileChannel.position();
}

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From source file:com.frostwire.util.MP4Muxer.java

public void demuxAudio(String video, String output, final MP4Metadata mt) throws IOException {

    FileInputStream videoIn = new FileInputStream(video);

    try {//from  www .  j a va  2  s.c  o  m
        FileChannel videoChannel = videoIn.getChannel();
        Movie videoMovie = buildMovie(videoChannel);

        Track audioTrack = null;

        for (Track trk : videoMovie.getTracks()) {
            if (trk.getHandler().equals("soun")) {
                audioTrack = trk;
                break;
            }
        }

        if (audioTrack == null) {
            IOUtils.closeQuietly(videoIn);
            return;
        }

        Movie outMovie = new Movie();
        outMovie.addTrack(audioTrack);

        Container out = new DefaultMp4Builder() {
            @Override
            protected FileTypeBox createFileTypeBox(Movie movie) {
                List<String> minorBrands = new LinkedList<String>();
                minorBrands.add("M4A ");
                minorBrands.add("mp42");
                minorBrands.add("isom");
                minorBrands.add("\0\0\0\0");

                return new FileTypeBox("M4A ", 0, minorBrands);
            }

            @Override
            protected MovieBox createMovieBox(Movie movie, Map<Track, int[]> chunks) {
                MovieBox moov = super.createMovieBox(movie, chunks);
                moov.getMovieHeaderBox().setVersion(0);
                return moov;
            }

            @Override
            protected TrackBox createTrackBox(Track track, Movie movie, Map<Track, int[]> chunks) {
                TrackBox trak = super.createTrackBox(track, movie, chunks);

                trak.getTrackHeaderBox().setVersion(0);
                trak.getTrackHeaderBox().setVolume(1.0f);

                return trak;
            }

            @Override
            protected Box createUdta(Movie movie) {
                return mt != null ? addUserDataBox(mt) : null;
            }
        }.build(outMovie);

        FileOutputStream fos = new FileOutputStream(output);
        try {
            out.writeContainer(fos.getChannel());
        } finally {
            IOUtils.closeQuietly(fos);
        }
    } finally {
        IOUtils.closeQuietly(videoIn);
    }
}

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From source file:com.panet.imeta.trans.steps.fixedinput.FixedInput.java

public boolean init(StepMetaInterface smi, StepDataInterface sdi) {
    meta = (FixedInputMeta) smi;/* www . ja v  a2s .  c o m*/
    data = (FixedInputData) sdi;

    if (super.init(smi, sdi)) {
        try {
            data.preferredBufferSize = Integer.parseInt(environmentSubstitute(meta.getBufferSize()));
            data.lineWidth = Integer.parseInt(environmentSubstitute(meta.getLineWidth()));
            data.filename = environmentSubstitute(meta.getFilename());

            if (Const.isEmpty(data.filename)) {
                logError(Messages.getString("FixedInput.MissingFilename.Message"));
                return false;
            }

            FileObject fileObject = KettleVFS.getFileObject(data.filename);
            try {
                FileInputStream fileInputStream = KettleVFS.getFileInputStream(fileObject);
                data.fc = fileInputStream.getChannel();
                data.bb = ByteBuffer.allocateDirect(data.preferredBufferSize);
            } catch (IOException e) {
                logError(e.toString());
                return false;
            }

            // Add filename to result filenames ?
            if (meta.isAddResultFile()) {
                ResultFile resultFile = new ResultFile(ResultFile.FILE_TYPE_GENERAL, fileObject,
                        getTransMeta().getName(), toString());
                resultFile.setComment("File was read by a Fixed input step");
                addResultFile(resultFile);
            }

            logBasic("Opened file with name [" + data.filename + "]");

            data.stopReading = false;

            if (meta.isRunningInParallel()) {
                data.stepNumber = getUniqueStepNrAcrossSlaves();
                data.totalNumberOfSteps = getUniqueStepCountAcrossSlaves();
                data.fileSize = fileObject.getContent().getSize();
            }

            // OK, now we need to skip a number of bytes in case we're doing a parallel read.
            //
            if (meta.isRunningInParallel()) {

                int totalLineWidth = data.lineWidth + meta.getLineSeparatorLength(); // including line separator bytes
                long nrRows = data.fileSize / totalLineWidth; // 100.000 / 100 = 1000 rows
                long rowsToSkip = Math.round(data.stepNumber * nrRows / (double) data.totalNumberOfSteps); // 0, 333, 667
                long nextRowsToSkip = Math
                        .round((data.stepNumber + 1) * nrRows / (double) data.totalNumberOfSteps); // 333, 667, 1000
                data.rowsToRead = nextRowsToSkip - rowsToSkip;
                long bytesToSkip = rowsToSkip * totalLineWidth;

                logBasic("Step #" + data.stepNumber + " is skipping " + bytesToSkip
                        + " to position in file, then it's reading " + data.rowsToRead + " rows.");

                data.fc.position(bytesToSkip);
            }

            return true;
        } catch (IOException e) {
            logError("Error opening file '" + meta.getFilename() + "' : " + e.toString());
            logError(Const.getStackTracker(e));
        }
    }
    return false;
}

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From source file:edu.rit.flick.util.FlickTest.java

private final void testForLosslessness() throws IOException, InterruptedException {
    Flick.main(VERBOSE_FLAG, originalFile.getPath());

    Unflick.main(VERBOSE_FLAG, flickedFile.getPath(), unflickedFile.getPath());

    if (!originalFile.exists()) {
        /*/*from w  ww.  j a  va 2s . co  m*/
         * By falling in here, we assume the test failed because the file
         * given as input was not found. Equally so, the flicked file will
         * not be found by the unflicker since no flicking would have been
         * able to occur.
         */
        final String expectedUsageStatement = String.format("%s%n%s%n",
                new NoSuchFileException(originalFile.getPath(), null,
                        AbstractFlickFile.FILE_NOT_FOUND_EXCEPTION_MESSAGE).getMessage().trim(),
                new NoSuchFileException(flickedFile.getPath(), null,
                        AbstractFlickFile.FILE_NOT_FOUND_EXCEPTION_MESSAGE).getMessage().trim());
        final Object[] errorStack = errContent.toString().split("\n");
        final int eSl = errorStack.length;
        final String actualUsageStatement = String.format("%s\n%s\n",
                Arrays.copyOfRange(errorStack, eSl - 2, eSl));
        assertEquals(expectedUsageStatement, actualUsageStatement);
        return;
    }

    final FileInputStream origFIS = new FileInputStream(originalFile);
    ByteBufferInputStream orig = ByteBufferInputStream.map(origFIS.getChannel());
    final FileInputStream comAndDecomFIS = new FileInputStream(unflickedFile);
    ByteBufferInputStream comAndDecom = ByteBufferInputStream.map(comAndDecomFIS.getChannel());

    if (!FileUtils.contentEquals(originalFile, unflickedFile)) {
        long position = 0;
        while (orig.available() > 0) {
            position++;
            final int o = orig.read();
            final int c = comAndDecom.read();
            assertEquals(format(FILES_DO_NOT_MATCH_ERROR_FORMAT, originalFile, unflickedFile, position),
                    (char) o + "", (char) c + "");
        }

        assertEquals(orig.available(), comAndDecom.available());

        origFIS.close();
        orig.close();
        comAndDecomFIS.close();
        comAndDecom.close();

        orig = null;
        comAndDecom = null;
    }
}

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From source file:com.filemanager.free.filesystem.FileUtil.java

/**
 * Copy a file. The target file may even be on external SD card for Kitkat.
 *
 * @param source The source file//from   ww  w.j  a  va2 s .  co m
 * @param target The target file
 * @return true if the copying was successful.
 */
@SuppressWarnings("null")
public static boolean copyFile(final File source, final File target, Context context) {
    FileInputStream inStream = null;
    OutputStream outStream = null;
    FileChannel inChannel = null;
    FileChannel outChannel = null;
    try {
        inStream = new FileInputStream(source);

        // First try the normal way
        if (isWritable(target)) {
            // standard way
            outStream = new FileOutputStream(target);
            inChannel = inStream.getChannel();
            outChannel = ((FileOutputStream) outStream).getChannel();
            inChannel.transferTo(0, inChannel.size(), outChannel);
        } else {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                // Storage Access Framework
                DocumentFile targetDocument = getDocumentFile(target, false, context);
                outStream = context.getContentResolver().openOutputStream(targetDocument.getUri());
            } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
                // Workaround for Kitkat ext SD card
                Uri uri = MediaStoreHack.getUriFromFile(target.getAbsolutePath(), context);
                outStream = context.getContentResolver().openOutputStream(uri);
            } else {
                return false;
            }

            if (outStream != null) {
                // Both for SAF and for Kitkat, write to output stream.
                byte[] buffer = new byte[16384]; // MAGIC_NUMBER
                int bytesRead;
                while ((bytesRead = inStream.read(buffer)) != -1) {
                    outStream.write(buffer, 0, bytesRead);
                }
            }

        }
    } catch (Exception e) {
        Log.e("AmazeFileUtils",
                "Error when copying file from " + source.getAbsolutePath() + " to " + target.getAbsolutePath(),
                e);
        return false;
    } finally {
        try {
            inStream.close();
        } catch (Exception e) {
            // ignore exception
        }
        try {
            outStream.close();
        } catch (Exception e) {
            // ignore exception
        }
        try {
            inChannel.close();
        } catch (Exception e) {
            // ignore exception
        }
        try {
            outChannel.close();
        } catch (Exception e) {
            // ignore exception
        }
    }
    return true;
}

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From source file:org.chromium.APKPackager.java

private void copyFile(File src, File dest) throws FileNotFoundException, IOException {
    FileInputStream istream = new FileInputStream(src);
    FileOutputStream ostream = new FileOutputStream(dest);
    FileChannel input = istream.getChannel();
    FileChannel output = ostream.getChannel();

    try {/*from  ww  w. ja v  a2s. com*/
        input.transferTo(0, input.size(), output);
    } finally {
        istream.close();
        ostream.close();
        input.close();
        output.close();
    }
}

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From source file:wicket.protocol.http.FilePageStore.java

/**
 * @see wicket.protocol.http.SecondLevelCacheSessionStore.IPageStore#getPage(java.lang.String,
 *      int, int)//w  ww .  j  a  v  a2  s  . c o  m
 */
public Page getPage(String sessionId, int id, int versionNumber) {
    File sessionDir = new File(workDir, sessionId);
    if (sessionDir.exists()) {
        File pageFile = getPageFile(id, versionNumber, sessionDir);
        if (pageFile.exists()) {
            FileInputStream fis = null;
            try {
                byte[] pageData = null;
                fis = new FileInputStream(pageFile);
                int length = (int) pageFile.length();
                ByteBuffer bb = ByteBuffer.allocate(length);
                fis.getChannel().read(bb);
                if (bb.hasArray()) {
                    pageData = bb.array();
                } else {
                    pageData = new byte[length];
                    bb.get(pageData);
                }

                Page page = (Page) Objects.byteArrayToObject(pageData);
                return page.getVersion(versionNumber);
            } catch (Exception e) {
                log.debug("Error loading page " + id + " with version " + versionNumber + " for the sessionid "
                        + sessionId + " from disc", e);
            } finally {
                try {
                    if (fis != null) {
                        fis.close();
                    }
                } catch (IOException ex) {
                    // ignore
                }
            }
        }
    }
    return null;
}

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From source file:org.carbondata.query.aggregator.impl.CustomAggregatorHelper.java

/**
 * Below method will be used to read the level files
 *
 * @param memberFile/* www . j  a  v a  2 s. c o  m*/
 * @param fileName
 * @throws IOException
 */
private void readLevelFileAndUpdateCache(File memberFile, String fileName) throws IOException {
    FileInputStream fos = null;
    FileChannel fileChannel = null;
    try {
        // create an object of FileOutputStream
        fos = new FileInputStream(memberFile);

        fileChannel = fos.getChannel();
        Map<Integer, String> memberMap = surrogateKeyMap.get(fileName);

        if (null == memberMap) {
            memberMap = new HashMap<Integer, String>(CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
            surrogateKeyMap.put(fileName, memberMap);
        }

        long size = fileChannel.size();
        int maxKey = 0;
        ByteBuffer rowlengthToRead = null;
        int len = 0;
        ByteBuffer row = null;
        int toread = 0;
        byte[] bb = null;
        String value = null;
        int surrogateValue = 0;

        boolean enableEncoding = Boolean.valueOf(
                CarbonProperties.getInstance().getProperty(CarbonCommonConstants.ENABLE_BASE64_ENCODING,
                        CarbonCommonConstants.ENABLE_BASE64_ENCODING_DEFAULT));

        while (fileChannel.position() < size) {
            rowlengthToRead = ByteBuffer.allocate(4);
            fileChannel.read(rowlengthToRead);
            rowlengthToRead.rewind();
            len = rowlengthToRead.getInt();
            if (len == 0) {
                continue;
            }

            row = ByteBuffer.allocate(len);
            fileChannel.read(row);
            row.rewind();
            toread = row.getInt();
            bb = new byte[toread];
            row.get(bb);

            if (enableEncoding) {
                value = new String(Base64.decodeBase64(bb), Charset.defaultCharset());
            } else {
                value = new String(bb, Charset.defaultCharset());
            }

            surrogateValue = row.getInt();
            memberMap.put(surrogateValue, value);

            // check if max key is less than Surrogate key then update the max key
            if (maxKey < surrogateValue) {
                maxKey = surrogateValue;
            }
        }

    } finally {
        CarbonUtil.closeStreams(fileChannel, fos);
    }
}

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