Example usage for java.io RandomAccessFile write

List of usage examples for java.io RandomAccessFile write

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Introduction

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

Prototype

public void write(byte b[]) throws IOException

Source Link

Document

Writes b.length bytes from the specified byte array to this file, starting at the current file pointer.

Usage

From source file:au.org.ala.layers.intersect.Grid.java

/**
 * for grid cutter/*w  w  w. j  av  a  2  s  . c  o m*/
 * <p/>
 * writes out a list of double (same as getGrid() returns) to a file
 * <p/>
 * byteorderlsb
 * data type, FLOAT
 *
 * @param newfilename
 * @param dfiltered
 */
public void writeGrid(String newfilename, double[] dfiltered, double xmin, double ymin, double xmax,
        double ymax, double xres, double yres, int nrows, int ncols) {
    int size, i, length = dfiltered.length;
    double maxvalue = Double.MAX_VALUE * -1;
    double minvalue = Double.MAX_VALUE;

    //write data as whole file
    RandomAccessFile afile = null;
    try { //read of random access file can throw an exception
        afile = new RandomAccessFile(newfilename + ".gri", "rw");

        size = 4;
        byte[] b = new byte[size * length];
        ByteBuffer bb = ByteBuffer.wrap(b);

        if (byteorderLSB) {
            bb.order(ByteOrder.LITTLE_ENDIAN);
        } else {
            bb.order(ByteOrder.BIG_ENDIAN);
        }
        for (i = 0; i < length; i++) {
            if (Double.isNaN(dfiltered[i])) {
                bb.putFloat((float) noDataValueDefault);
            } else {
                if (minvalue > dfiltered[i]) {
                    minvalue = dfiltered[i];
                }
                if (maxvalue < dfiltered[i]) {
                    maxvalue = dfiltered[i];
                }
                bb.putFloat((float) dfiltered[i]);
            }
        }

        afile.write(b);
    } catch (Exception e) {
        logger.error("error writing grid file", e);
    } finally {
        if (afile != null) {
            try {
                afile.close();
            } catch (Exception e) {
                logger.error(e.getMessage(), e);
            }
        }
    }

    writeHeader(newfilename, xmin, ymin, xmin + xres * ncols, ymin + yres * nrows, xres, yres, nrows, ncols,
            minvalue, maxvalue, "FLT4BYTES", String.valueOf(noDataValueDefault));
}

From source file:au.org.ala.layers.intersect.Grid.java

public void writeGrid(String newfilename, float[] dfiltered, double xmin, double ymin, double xmax, double ymax,
        double xres, double yres, int nrows, int ncols) {
    int size, i, length = dfiltered.length;
    double maxvalue = Double.MAX_VALUE * -1;
    double minvalue = Double.MAX_VALUE;

    //write data as whole file
    RandomAccessFile afile = null;
    try { //read of random access file can throw an exception
        afile = new RandomAccessFile(newfilename + ".gri", "rw");

        size = 4;/*from   www . j a va 2s .  co m*/
        byte[] b = new byte[size * length];
        ByteBuffer bb = ByteBuffer.wrap(b);

        if (byteorderLSB) {
            bb.order(ByteOrder.LITTLE_ENDIAN);
        } else {
            bb.order(ByteOrder.BIG_ENDIAN);
        }
        for (i = 0; i < length; i++) {
            if (Double.isNaN(dfiltered[i])) {
                bb.putFloat((float) noDataValueDefault);
            } else {
                if (minvalue > dfiltered[i]) {
                    minvalue = dfiltered[i];
                }
                if (maxvalue < dfiltered[i]) {
                    maxvalue = dfiltered[i];
                }
                bb.putFloat((float) dfiltered[i]);
            }
        }

        afile.write(b);
    } catch (Exception e) {
        logger.error("error writing grid file", e);
    } finally {
        if (afile != null) {
            try {
                afile.close();
            } catch (Exception e) {
                logger.error(e.getMessage(), e);
            }
        }
    }

    writeHeader(newfilename, xmin, ymin, xmin + xres * ncols, ymin + yres * nrows, xres, yres, nrows, ncols,
            minvalue, maxvalue, "FLT4BYTES", String.valueOf(noDataValueDefault));

}

From source file:com.av.remusic.service.MediaService.java

private void saveQueue(final boolean full) {
    if (!mQueueIsSaveable) {
        return;//from w  ww  . j a v  a  2  s.  c o  m
    }

    final SharedPreferences.Editor editor = mPreferences.edit();
    if (full) {
        mPlaybackStateStore.saveState(mPlaylist, mShuffleMode != SHUFFLE_NONE ? mHistory : null);
        if (mPlaylistInfo.size() > 0) {
            String temp = MainApplication.gsonInstance().toJson(mPlaylistInfo);
            try {
                File file = new File(getCacheDir().getAbsolutePath() + "playlist");
                RandomAccessFile ra = new RandomAccessFile(file, "rws");
                ra.write(temp.getBytes());
                ra.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        editor.putInt("cardid", mCardId);

    }
    editor.putInt("curpos", mPlayPos);
    if (mPlayer.isInitialized()) {
        editor.putLong("seekpos", mPlayer.position());
    }
    editor.putInt("repeatmode", mRepeatMode);
    editor.putInt("shufflemode", mShuffleMode);
    editor.apply();
}

From source file:org.apache.hadoop.hive.service.HSSessionItem.java

public boolean uploadModule(String user, String moduleName, byte[] module) throws HiveServerException {
    boolean res = true;
    String fname = getHome() + "/pl/lib/" + user + "/" + moduleName;
    RandomAccessFile raf;
    File f;//w  ww . j av a  2 s  .  c om

    String dname = getHome() + "/pl/lib/" + user;
    File d = new File(dname);

    if (!d.exists()) {
        if (!d.mkdir()) {
            l4j.error(getSessionName() + " try to mkdir " + dname + " failed.");
            throw new HiveServerException("Create user library failed.");
        }
    }
    File i = new File(getHome() + "/pl/lib/" + user + "/__init__.py");

    if (!i.exists()) {
        try {
            i.createNewFile();
        } catch (java.io.IOException oe) {
        }
    }

    try {
        f = new File(fname);
        if (!f.exists()) {
            if (!f.createNewFile()) {
                l4j.error("Try to create file " + fname + " failed.");
                throw new HiveServerException("Create user package failed.");
            }
        }
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to create file " + fname + " failed w/ " + ex);
        return false;
    }
    if (module.length == 0) {
        if (!f.delete()) {
            l4j.error("Try to delete file " + fname + " failed.");
            throw new HiveServerException("Delete user package " + fname + " failed.");
        } else {
            return true;
        }
    }

    try {
        raf = new RandomAccessFile(f, "rw");
    } catch (java.io.FileNotFoundException ex) {
        l4j.error(getSessionName() + " try to open file " + fname + " failed, not found.");
        return false;
    }
    try {
        raf.setLength(0);
        raf.seek(0);
        raf.write(module);
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to truncate/write file " + fname + "failed w/ " + ex);
        return false;
    }
    return res;
}

From source file:au.org.ala.layers.intersect.Grid.java

public void mergeMissingValues(Grid sourceOfMissingValues, boolean hideMissing) {
    float[] cells = sourceOfMissingValues.getGrid();

    float[] actual = getGrid();

    int length = actual.length;

    int i;//  w  w w . j  av  a  2  s . c o  m
    RandomAccessFile afile = null;
    File f2 = new File(filename + ".GRI");

    try { //read of random access file can throw an exception
        if (!f2.exists()) {
            afile = new RandomAccessFile(filename + ".gri", "rw");
        } else {
            afile = new RandomAccessFile(filename + ".GRI", "rw");
        }

        byte[] b = new byte[(int) afile.length()];

        ByteBuffer bb = ByteBuffer.wrap(b);

        if (byteorderLSB) {
            bb.order(ByteOrder.LITTLE_ENDIAN);
        }

        afile.seek(0);

        if (datatype.equalsIgnoreCase("UBYTE")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    if (nodatavalue >= 128) {
                        bb.put((byte) (nodatavalue - 256));
                    } else {
                        bb.put((byte) nodatavalue);
                    }
                } else {
                    if (actual[i] >= 128) {
                        bb.put((byte) (actual[i] - 256));
                    } else {
                        bb.put((byte) actual[i]);
                    }
                }
            }
        } else if (datatype.equalsIgnoreCase("BYTE")) {
            for (i = 0; i < length; i++) {
                bb.put((byte) actual[i]);
            }
        } else if (datatype.equalsIgnoreCase("SHORT")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    bb.putShort((short) nodatavalue);
                } else {
                    bb.putShort((short) actual[i]);
                }
            }
        } else if (datatype.equalsIgnoreCase("INT")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    bb.putInt((int) nodatavalue);
                } else {
                    bb.putInt((int) actual[i]);
                }
            }
        } else if (datatype.equalsIgnoreCase("LONG")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    bb.putLong((long) nodatavalue);
                } else {
                    bb.putLong((long) actual[i]);
                }
            }
        } else if (datatype.equalsIgnoreCase("FLOAT")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    bb.putFloat((float) nodatavalue);
                } else {
                    bb.putFloat(actual[i]);
                }
            }
        } else if (datatype.equalsIgnoreCase("DOUBLE")) {
            for (i = 0; i < length; i++) {
                if (hideMissing == Float.isNaN(cells[i])) {
                    bb.putDouble((double) nodatavalue);
                } else {
                    bb.putDouble((double) actual[i]);
                }
            }
        } else {
            // should not happen
            logger.error("unsupported grid data type: " + datatype);
        }

        afile.write(bb.array());
    } catch (Exception e) {
        logger.error("error getting grid file values", e);
    } finally {
        if (afile != null) {
            try {
                afile.close();
            } catch (Exception e) {
                logger.error(e.getMessage(), e);
            }
        }
    }
}

From source file:org.telegram.ui.PassportActivity.java

private EncryptionResult createSecureDocument(String path) {
    File file = new File(path);
    int length = (int) file.length();
    byte[] b = new byte[length];
    RandomAccessFile f = null;
    try {//w w  w . j a  v  a2 s.c o  m
        f = new RandomAccessFile(path, "rws");
        f.readFully(b);
    } catch (Exception ignore) {

    }
    EncryptionResult result = encryptData(b);
    try {
        f.seek(0);
        f.write(result.encryptedData);
        f.close();
    } catch (Exception ignore) {

    }
    return result;
}