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:it.readbeyond.minstrel.commander.Commander.java

private void copyFile(String sourcePath, String destinationPath, final CallbackContext callbackContext) {
    String source = this.normalizePath(sourcePath);
    String destination = this.normalizePath(destinationPath);
    try {/*from w  w w  . j a  v  a 2  s  .com*/
        File f = new File(source);
        if (f.exists()) {
            File d = new File(destination);

            // create parent directory, if not existing
            File destinationParent = d.getParentFile();
            destinationParent.mkdirs();

            // TODO check for write permission?
            // copy file
            FileInputStream inStream = new FileInputStream(f);
            FileOutputStream outStream = new FileOutputStream(d);
            FileChannel inChannel = inStream.getChannel();
            FileChannel outChannel = outStream.getChannel();
            inChannel.transferTo(0, inChannel.size(), outChannel);
            inStream.close();
            outStream.close();
            callbackContext.success(MESSAGE_FILE_COPIED);

        } else {
            callbackContext.success(MESSAGE_FILE_DOES_NOT_EXIST);
        }
    } catch (Exception e) {
        callbackContext.success(MESSAGE_ERROR_WHILE_COPYING);
    }
}

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From source file:thv.th.view.AnimationPanel.java

protected Vector<THAnimation> loadAnimations(int start) throws IOException {
    Vector<THAnimation> res = new Vector<THAnimation>();

    int animCount = (int) (startFile.length() / 4);

    FileInputStream startStream = new FileInputStream(startFile);
    ABuffer tabStream = new FileBuffer(tabFile);
    FileInputStream chunkStream = new FileInputStream(chunksFile);
    FileInputStream frameStream = new FileInputStream(framesFile);
    FileInputStream listStream = new FileInputStream(listFile);
    FileInputStream elementStream = new FileInputStream(spriteElementFile);

    for (int i = 0; i < perPage; ++i) {
        if ((i + start) >= animCount)
            break;

        startStream.getChannel().position((i + start) * 4);
        int index = EndianUtils.readSwappedShort(startStream);

        int maxFrameWidth = 0;
        int maxFrameHeight = 0;
        int maxXOffset = 0;
        int minYOffset = 256;

        Vector<THFrame> frames = loadFrameChain(index, frameStream, listStream, elementStream);

        if (frames.size() == 0)
            continue;

        for (THFrame frame : frames) {
            if (frame.getWidth() > maxFrameWidth) {
                maxFrameWidth = frame.getWidth();
                //maxXOffset = frame.getMaxXOffset(tabStream);
            }/*  w ww . j  a  va2  s .  co  m*/

            maxXOffset = Math.max(maxXOffset, frame.getMaxXOffset(tabStream));
            minYOffset = Math.min(minYOffset, frame.getMinYOffset(tabStream));
        }

        int xover = 0;
        int xunder = 0;
        int yover = 0;
        int yunder = 0;

        for (THFrame frame : frames) {
            xover = Math.max(xover, frame.getXOverrun(maxFrameWidth, maxXOffset, tabStream));
            xunder = Math.max(xunder, frame.getXUnderrun(maxFrameWidth, maxXOffset, tabStream));
            yover = Math.max(yover, frame.getYOverrun(0, minYOffset, tabStream));
            yunder = Math.max(yunder, frame.getYUnderrun(0, minYOffset, tabStream));
        }

        maxFrameWidth += xover + xunder;
        maxFrameHeight += yover + yunder;

        THAnimation an = new THAnimation(maxFrameWidth, maxFrameHeight, i + start);

        for (THFrame frame : frames) {
            an.addFrame(frame.renderInAnim(tabStream, chunkStream, palette, 4, maxFrameWidth, maxFrameHeight,
                    maxXOffset, minYOffset, xunder, yunder), frame);
        }

        res.add(an);
    }

    //tabStream.close();
    chunkStream.close();
    frameStream.close();
    listStream.close();
    elementStream.close();

    selectPanel.setSelectionCount((animCount / perPage) + 1);

    return res;
}

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From source file:automenta.knowtention.channel.LineFileChannel.java

@Override
public void run() {

    FileInputStream fileInputStream = null;
    FileChannel channel = null;//from   w  w w . j  av a  2s  . c om
    ByteBuffer buffer = null;
    LinkedList<String> lines = new LinkedList();
    StringBuilder builder = new StringBuilder();
    long lastSize = -1, lastLastModified = -1;

    while (running) {
        try {
            Thread.sleep(delayPeriodMS);
        } catch (InterruptedException ex) {
        }

        lines.clear();
        try {
            fileInputStream = new FileInputStream(file);

            channel = fileInputStream.getChannel();

            long lastModified = file.lastModified();
            long csize = channel.size();
            if ((lastModified == lastLastModified) && (csize == lastSize)) { //also check file update time?
                fileInputStream.close();
                continue;
            }

            int currentPos = (int) csize;

            buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, csize);
            buffer.position(currentPos);
            lastSize = csize;
            lastLastModified = lastModified;

            int count = 0;

            for (long i = csize - 1; i >= 0; i--) {

                char c = (char) buffer.get((int) i);

                if (c == '\n') {
                    count++;
                    builder.reverse();
                    lines.addFirst(builder.toString());
                    if (count == numLines) {
                        break;
                    }
                    builder.setLength(0);
                } else
                    builder.append(c);
            }

            update(lines);

            lines.clear();
            buffer.clear();
            channel.close();
            fileInputStream.close();
            fileInputStream = null;

        } catch (Exception ex) {
            Logger.getLogger(LineFileChannel.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    try {
        channel.close();
    } catch (IOException ex) {
        Logger.getLogger(LineFileChannel.class.getName()).log(Level.SEVERE, null, ex);
    }
}

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From source file:kr.wdream.storyshop.AndroidUtilities.java

public static boolean copyFile(File sourceFile, File destFile) throws IOException {
    if (!destFile.exists()) {
        destFile.createNewFile();//from  w w w.j  ava  2 s  .  c  om
    }
    FileInputStream source = null;
    FileOutputStream destination = null;
    try {
        source = new FileInputStream(sourceFile);
        destination = new FileOutputStream(destFile);
        destination.getChannel().transferFrom(source.getChannel(), 0, source.getChannel().size());
    } catch (Exception e) {
        FileLog.e("tmessages", e);
        return false;
    } finally {
        if (source != null) {
            source.close();
        }
        if (destination != null) {
            destination.close();
        }
    }
    return true;
}

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From source file:org.cytobank.fcs_files.events.MemoryEvents.java

public MemoryEvents(File doubleFile) throws IOException, MemoryEventsException {
    this.doubleFile = doubleFile;

    numberOfEvents = (int) doubleFile.length() / BYTES_PER_DOUBLE;

    setupMemoryEventsArray(numberOfEvents);

    try {/*from  ww  w .  j  a  v a 2 s .  c o  m*/
        // Read in the doubles file
        FileInputStream fileInputStream = new FileInputStream(doubleFile);
        FileChannel fileChannel = fileInputStream.getChannel();
        MappedByteBuffer mappedByteBuffer = fileChannel.map(MapMode.READ_ONLY, 0, doubleFile.length());
        DoubleBuffer doubleBuffer = mappedByteBuffer.asDoubleBuffer();

        doubleBuffer.get(events, 0, numberOfEvents);

        fileChannel.close();
        fileInputStream.close();
    } catch (IOException ioe) {
        destroy();
        throw ioe;
    }

    openedAt = System.currentTimeMillis();
}

---

From source file:org.apache.hadoop.hdfs.tools.offlineImageViewer.PBImageTextWriter.java

private void output(Configuration conf, FileSummary summary, FileInputStream fin,
        ArrayList<FileSummary.Section> sections) throws IOException {
    InputStream is;//from  w  w  w  . ja va  2 s.c o m
    long startTime = Time.monotonicNow();
    for (FileSummary.Section section : sections) {
        if (SectionName.fromString(section.getName()) == SectionName.INODE) {
            fin.getChannel().position(section.getOffset());
            is = FSImageUtil.wrapInputStreamForCompression(conf, summary.getCodec(),
                    new BufferedInputStream(new LimitInputStream(fin, section.getLength())));
            outputINodes(is);
        }
    }
    long timeTaken = Time.monotonicNow() - startTime;
    LOG.debug("Time to output inodes: {}ms", timeTaken);
}

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From source file:com.quartz.AmazonQuartzJob.java

/**
 * Calculate content MD5 header values for feeds stored on disk.
 *//*  ww w.  ja  va2 s  .  c o  m*/
public String computeContentMD5HeaderValue(FileInputStream fis) throws IOException, NoSuchAlgorithmException {
    DigestInputStream dis = new DigestInputStream(fis, MessageDigest.getInstance("MD5"));
    byte[] buffer = new byte[8192];
    while (dis.read(buffer) > 0)
        ;
    String md5Content = new String(
            org.apache.commons.codec.binary.Base64.encodeBase64(dis.getMessageDigest().digest()));
    // Effectively resets the stream to be beginning of the file
    // via a FileChannel.
    fis.getChannel().position(0);
    return md5Content;
}

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From source file:org.apache.hadoop.hdfs.BlockReaderLocalLegacy.java

/**
 * Reads bytes into a buffer until EOF or the buffer's limit is reached
 *//*from  w w  w  .  j a  v  a  2s .  c o  m*/
private int fillBuffer(FileInputStream stream, ByteBuffer buf) throws IOException {
    try (TraceScope ignored = tracer.newScope("BlockReaderLocalLegacy#fillBuffer(" + blockId + ")")) {
        int bytesRead = stream.getChannel().read(buf);
        if (bytesRead < 0) {
            //EOF
            return bytesRead;
        }
        while (buf.remaining() > 0) {
            int n = stream.getChannel().read(buf);
            if (n < 0) {
                //EOF
                return bytesRead;
            }
            bytesRead += n;
        }
        return bytesRead;
    }
}

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From source file:org.gdms.driver.shapefile.ShapefileDriver.java

@Override
public void open() throws DriverException {
    LOG.trace("Opening");
    try {//w w  w.  j  a va  2s . com
        FileInputStream shpFis = new FileInputStream(file);
        reader = new ShapefileReader(shpFis.getChannel());
        File shx = FileUtils.getFileWithExtension(file, "shx");
        if (shx == null || !shx.exists()) {
            throw new DriverException("The file " + file.getAbsolutePath() + " has no corresponding .shx file");
        }
        FileInputStream shxFis = new FileInputStream(shx);
        shxFile = new IndexFile(shxFis.getChannel());

        ShapefileHeader header = reader.getHeader();
        envelope = new Envelope(new Coordinate(header.minX(), header.minY()),
                new Coordinate(header.maxX(), header.maxY()));

        ShapeType type = header.getShapeType();

        dbfDriver = new DBFDriver();
        dbfDriver.setDataSourceFactory(dataSourceFactory);
        File dbf = FileUtils.getFileWithExtension(file, "dbf");
        if (dbf == null || !dbf.exists()) {
            throw new DriverException("The file " + file.getAbsolutePath() + " has no corresponding .dbf file");
        }
        dbfDriver.setFile(dbf);
        dbfDriver.open();

        // registering DataSet
        dataSet = dbfDriver.getTable(DriverManager.DEFAULT_SINGLE_TABLE_NAME);

        Constraint dc;
        //We can force the type of the data in the GDMS table according to the type
        //given in the ShapeFile. This variable is here for this task.
        int gtype;
        // In case of a geometric type, the GeometryConstraint is mandatory
        if (type.id == ShapeType.POINT.id) {
            gtype = Type.POINT;
            dc = new Dimension3DConstraint(2);
        } else if (type.id == ShapeType.ARC.id) {
            gtype = Type.MULTILINESTRING;
            dc = new Dimension3DConstraint(2);
        } else if (type.id == ShapeType.POLYGON.id) {
            gtype = Type.MULTIPOLYGON;
            dc = new Dimension3DConstraint(2);
        } else if (type.id == ShapeType.MULTIPOINT.id) {
            gtype = Type.MULTIPOINT;
            dc = new Dimension3DConstraint(2);
        } else if (type.id == ShapeType.POINTZ.id) {
            gtype = Type.POINT;
            dc = new Dimension3DConstraint(3);
        } else if (type.id == ShapeType.ARCZ.id) {
            gtype = Type.MULTILINESTRING;
            dc = new Dimension3DConstraint(3);
        } else if (type.id == ShapeType.POLYGONZ.id) {
            gtype = Type.MULTIPOLYGON;
            dc = new Dimension3DConstraint(3);
        } else if (type.id == ShapeType.MULTIPOINTZ.id) {
            gtype = Type.MULTIPOINT;
            dc = new Dimension3DConstraint(3);
        } else {
            throw new DriverException("Unknown geometric type !");
        }

        Constraint[] constraints;

        File prj = FileUtils.getFileWithExtension(file, "prj");
        if (prj != null && prj.exists()) {
            crs = DataSourceFactory.getCRSFactory().createFromPrj(prj);
            if (crs != null) {
                CRSConstraint cc = new CRSConstraint(crs);
                constraints = new Constraint[] { dc, cc };
            } else {
                constraints = new Constraint[] { dc };
            }
        } else {
            constraints = new Constraint[] { dc };
        }

        metadata.clear();
        metadata.addField(0, "the_geom", gtype, constraints);
        metadata.addAll(dataSet.getMetadata());

    } catch (IOException e) {
        throw new DriverException(e);
    } catch (ShapefileException e) {
        throw new DriverException(e);
    } catch (InvalidTypeException e) {
        throw new DriverException(e);
    } catch (CRSException e) {
        throw new DriverException(e);
    }
}

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From source file:com.liferay.portal.util.FileImpl.java

public boolean isSameContent(File file, byte[] bytes, int length) {
    FileChannel fileChannel = null;

    try {//  www .  j  a v a  2s .  c o  m
        FileInputStream fileInputStream = new FileInputStream(file);

        fileChannel = fileInputStream.getChannel();

        if (fileChannel.size() != length) {
            return false;
        }

        byte[] buffer = new byte[1024];

        ByteBuffer byteBuffer = ByteBuffer.wrap(buffer);

        int bufferIndex = 0;
        int bufferLength = -1;

        while (((bufferLength = fileChannel.read(byteBuffer)) > 0) && (bufferIndex < length)) {

            for (int i = 0; i < bufferLength; i++) {
                if (buffer[i] != bytes[bufferIndex++]) {
                    return false;
                }
            }

            byteBuffer.clear();
        }

        if ((bufferIndex != length) || (bufferLength != -1)) {
            return false;
        } else {
            return true;
        }
    } catch (Exception e) {
        return false;
    } finally {
        if (fileChannel != null) {
            try {
                fileChannel.close();
            } catch (IOException ioe) {
            }
        }
    }
}

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