Example usage for java.nio ByteBuffer putDouble

Introduction

In this page you can find the example usage for java.nio ByteBuffer putDouble.

Prototype

public abstract ByteBuffer putDouble(double value);

Source Link

Document

Writes the given double to the current position and increases the position by 8.

Usage

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  . ja  v a2s .com*/
    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);
            }
        }
    }
}