Java Variable.read方法代码示例

import ucar.nc2.Variable; //导入方法依赖的package包/类
/**
 * Reads the times from the given timeVariable and converts them to MJD
 * in the returned array.
 *
 * @param timeVariable
 * @return times array.
 * @throws IOException
 */
private static double[] readTimes(Variable timeVariable) throws IOException {
	double[] convertedTimes = new double[0];

	if ((timeVariable != null) && timeVariable.isCoordinateVariable()) {
		//read times.
		ucar.ma2.Array timesArray = timeVariable.read();
		double[] times = (double[]) timesArray.get1DJavaArray(double.class);

		//convert times.
		convertedTimes = new double[times.length];
		DateUnit dateUnit = getDateUnitFromDimension(timeVariable);
		for (int n = 0; n < times.length; n++) {
			Date date = dateUnit.makeDate(times[n]);
			if (date == null) {
				convertedTimes[n] = 0;
				continue;
			}

			long time = date.getTime();
			convertedTimes[n] = Time.milliesToMjd(time);
		}
	}

	return convertedTimes;
}
 

import ucar.nc2.Variable; //导入方法依赖的package包/类
/**
 * Reads a section of the data for a variable and return a memory resident Array. The Array has the same
 * element type as the Variable, and the requested shape. Note that this does not do rank reduction, so
 * the returned Array has the same rank as the Variable. Use Array.reduce() for rank reduction.
 * <p>
 * <code>assert(origin[ii] + shape[ii]*stride[ii] <= Variable.shape[ii]); </code>
 * <p>
 * 
 * @param origin int array specifying for each dimension of the variable the starting index of the
 *            extraction . If null, assume all zeroes.
 * @param shape int array specifying the extents in each dimension. If null, assume getShape(); This
 *            becomes the shape of the returned Array.
 * @param fullName variable, with the specified (full) name. It may possibly be nested in multiple groups
 *            and/or structures. eg "group/subgroup/name1.name2.name".
 * 
 * @return a ucar.ma2.Array with data for the variable.
 * 
 * @throws NetCdfVariableNotFoundException the net cdf variable not found exception
 * @throws NetCdfVariableException the net cdf variable exception
 */
public Array getGrid(String fullName, int[] origin, int[] shape) throws NetCdfVariableException, NetCdfVariableNotFoundException {
    if (LOG.isDebugEnabled()) {
        LOG.debug("getGrid() - entering");
    }

    Variable var = null;
    Array grid = null;

    var = getVariable(fullName);

    try {
        grid = var.read(origin, shape);
    } catch (Exception e) {
        LOG.error("getGrid()", e);

        throw new NetCdfVariableException(var, "Error in getGrid", e);
    }

    if (LOG.isDebugEnabled()) {
        LOG.debug("getGrid() - exiting");
    }
    return grid;
}
 

import ucar.nc2.Variable; //导入方法依赖的package包/类
public static Array read(Variable var, int[] origin, int[] shape, NetCdfWriter netCdfWriter) throws IOException, InvalidRangeException {
    long d1 = System.nanoTime();
    Array data = var.read(origin, shape);
    long d2 = System.nanoTime();
    if (netCdfWriter != null) {
        netCdfWriter.readingTime += (d2 - d1);
    }
    return data;
}
 

import ucar.nc2.Variable; //导入方法依赖的package包/类
/**
 * Fills variable data in one gulp. It reads all the variable data in memory and fills in a Array object.
 * 
 * @param varToRead variable to be read.
 * @param dataToFill array fto fill in.
 * @param originToFill originToFill
 * @param fillValue fillValue
 * @throws MotuException
 */
protected void fillDataInOneGulp(Variable varToRead, Array dataToFill, int[] originToFill, double fillValue) throws MotuException {
    Array dataRead = null;
    try {
        dataRead = varToRead.read();
    } catch (IOException e) {
        throw new MotuException(ErrorType.BAD_PARAMETERS, "Error in DatasetGridXYLatLon fillDataInOneGulp", e);
    }

    switch (dataRead.getRank()) {
    case 1:

        break;
    case 2:
        fillData2D(varToRead, dataRead, dataToFill, originToFill, fillValue);
        break;
    case 3:

        break;
    case 4:

        break;

    default:
        break;
    }
}