Package ucar.nc2

Class Sequence

    • Method Detail

      • getStructureIterator

        public StructureDataIterator getStructureIterator​(int bufferSize)
                                           throws IOException
        Description copied from class: Structure
        Get an efficient iterator over all the data in the Structure. This is the efficient way to get all the data, it can be much faster than reading one record at a time, and is optimized for large datasets. This is accomplished by buffering bufferSize amount of data at once. 
         Example:

  StructureDataIterator ii = structVariable.getStructureIterator(100 * 1000);
  while (ii.hasNext()) {
    StructureData sdata = ii.next();
  }
        Overrides:
        getStructureIterator in class Structure
        Parameters:
        bufferSize - size in bytes to buffer, set < 0 to use default size
        Returns:
        StructureDataIterator over type StructureData
        Throws:
        IOException - on read error

      • read

        public Array read​(int[] origin,
                  int[] shape)
        Description copied from class: Variable
        Read a section of the data for this 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.

        assert(origin[ii] + shape[ii]*stride[ii] <= Variable.shape[ii]);

        Overrides:
        read in class Variable
        Parameters:
        origin - int array specifying the starting index. If null, assume all zeroes.
        shape - int array specifying the extents in each dimension. This becomes the shape of the returned Array.
        Returns:
        the requested data in a memory-resident Array
        Throws:
        UnsupportedOperationException - always

      • read

        public Array read​(String sectionSpec)
        Description copied from class: Variable
        Read data section specified by a "section selector", and return a memory resident Array. Uses Fortran 90 array section syntax.
        Overrides:
        read in class Variable
        Parameters:
        sectionSpec - specification string, eg "1:2,10,:,1:100:10". May optionally have ().
        Returns:
        the requested data in a memory-resident Array
        Throws:
        UnsupportedOperationException - always
        See Also:
        for sectionSpec syntax

      • read

        public Array read​(List<Range> ranges)
        Description copied from class: Variable
        Read a section of the data for this Variable from the netcdf file and return a memory resident Array.
        Overrides:
        read in class Variable
        Parameters:
        ranges - list of Range specifying the section of data to read.
        Returns:
        the requested data in a memory-resident Array
        Throws:
        UnsupportedOperationException - always
        See Also:
        Variable.read(Section)

      • read

        public Array read​(Section section)
           throws IOException
        Description copied from class: Variable
        Read a section of the data for this Variable from the netcdf file 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.

        If the Variable is a member of an array of Structures, this returns only the variable's data in the first Structure, so that the Array shape is the same as the Variable. To read the data in all structures, use ncfile.readSectionSpec().

        Note this only allows you to specify a subset of this variable. If the variable is nested in an array of structures and you want to subset that, use NetcdfFile.read(String sectionSpec, boolean flatten);

        Overrides:
        read in class Variable
        Parameters:
        section - list of Range specifying the section of data to read. Must be null or same rank as variable. If list is null, assume all data. Each Range corresponds to a Dimension. If the Range object is null, it means use the entire dimension.
        Returns:
        the requested data in a memory-resident Array
        Throws:
        IOException - if error

      • readStructure

        public StructureData readStructure​(int index)
        Description copied from class: Structure
        Use this when this is a one dimensional array of Structures, or you are doing the index calculation yourself for a multidimension array. This will read only the ith structure, and return the data as a StructureData object.
        Overrides:
        readStructure in class Structure
        Parameters:
        index - index into 1D array
        Returns:
        ith StructureData
        Throws:
        UnsupportedOperationException - always

      • readStructure

        public ArrayStructure readStructure​(int start,
                                    int count)
        Description copied from class: Structure
        For rank 1 array of Structures, read count Structures and return the data as an ArrayStructure. Use only when this is a one dimensional array of Structures.
        Overrides:
        readStructure in class Structure
        Parameters:
        start - start at this index
        count - return this many StructureData
        Returns:
        the StructureData recordsfrom start to start+count-1
        Throws:
        UnsupportedOperationException - always

      • slice

        public Variable slice​(int dim,
                      int value)
        Description copied from class: Variable
        Create a new Variable that is a logical slice of this Variable, by fixing the specified dimension at the specified index value. This reduces rank by 1. No data is read until a read method is called on it.
        Overrides:
        slice in class Variable
        Parameters:
        dim - which dimension to fix
        value - at what index value
        Returns:
        a new Variable which is a logical slice of this Variable.
        Throws:
        UnsupportedOperationException - always

      • section

        public Variable section​(Section subsection)
        Description copied from class: Variable
        Create a new Variable that is a logical subsection of this Variable. No data is read until a read method is called on it.
        Overrides:
        section in class Variable
        Parameters:
        subsection - Section of this variable. Each Range in the section corresponds to a Dimension, and specifies the section of data to read in that Dimension. A Range object may be null, which means use the entire dimension.
        Returns:
        a new Variable which is a logical section of this Variable.
        Throws:
        UnsupportedOperationException - always

      • builder

        public static Sequence.Builder<?> builder()
        Get Builder for this class that allows subclassing.
        See Also:
        "https://community.oracle.com/blogs/emcmanus/2010/10/24/using-builder-pattern-subclasses"