ucar.ma2

Class ArrayStructureMA

java.lang.Object

ucar.ma2.Array

ucar.ma2.ArrayStructure

ucar.ma2.ArrayStructureMA

public class ArrayStructureMA
extends ArrayStructure

Concrete implementation of ArrayStructure, data storage is in member arrays, which are converted to StructureData member data on the fly. This defers object creation for efficiency. Use getJavaArrayXXX() and getScalarXXX() data accessors if possible. How to create:

    ArrayStructureMA asma = new ArrayStructureMA( smembers, getShape());
    for (int i = 0; i < orgVariables.size(); i++) {
      Variable v = (Variable) orgVariables.get(i);
      Array data = v.read();
      asma.setMemberArray( v.getName(), data);
    } 

How to do Nested Structures:

   Structure {
     float f1;
     short f2(3);

     Structure {
       int g1;
       double(2) g2;
       double(3,4) g3;

       Structure {
         int h1;
         double(2) h2;
       } nested2(7);

     } nested1(12);
   } s(4);
   

• For f1, you need an ArrayFloat of shape {4}
• For f2, you need an ArrayShort of shape {4, 3} .
• For nested1, you need an ArrayStructure of shape {4, 12}. Use an ArrayStructureMA that has 3 members:
  • For g1, you need an ArrayInt of shape (4, 12}
  • For g2, you need an ArrayDouble of shape {4, 12, 2}.
  • For g3, you need an ArrayDouble of shape {4, 12, 3, 4}.
• For nested2, you need an ArrayStructure of shape {4, 12, 7}. Use an ArrayStructureMA that has 2 members:
  • For h1, you need an ArrayInt of shape (4, 12, 7}
  • For h2, you need an ArrayDouble of shape {4, 12, 7, 2}.

Example code:

  public void testMA() throws IOException, InvalidRangeException {
    StructureMembers members = new StructureMembers("s");

    StructureMembers.Member m = members.addMember("f1", "desc", CDM.UNITS, DataType.FLOAT, new int[]{1});
    Array data = Array.factory(DataType.FLOAT, new int[]{4});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("f2", "desc", CDM.UNITS, DataType.SHORT, new int[]{3});
    data = Array.factory(DataType.SHORT, new int[]{4, 3});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("nested1", "desc", CDM.UNITS, DataType.STRUCTURE, new int[]{9});
    data = makeNested1(m);
    m.setDataArray(data);

    ArrayStructureMA as = new ArrayStructureMA(members, new int[]{4});
    //System.out.println( NCdumpW.printArray(as, "", null));
    new TestStructureArray().testArrayStructure(as);

    // get f2 out of the 3nd "s"
    StructureMembers.Member f2 = as.getStructureMembers().findMember("f2");
    short[] f2data = as.getJavaArrayShort(2, f2);
    assert f2data[0] == 20;
    assert f2data[1] == 21;
    assert f2data[2] == 22;

    // get nested1 out of the 3nd "s"
    StructureMembers.Member nested1 = as.getStructureMembers().findMember("nested1");
    ArrayStructure nested1Data = as.getArrayStructure(2, nested1);

    // get g1 out of the 7th "nested1"
    StructureMembers.Member g1 = nested1Data.getStructureMembers().findMember("g1");
    int g1data = nested1Data.getScalarInt(6, g1);
    assert g1data == 26;

    // get nested2 out of the 7th "nested1"
    StructureMembers.Member nested2 = nested1Data.getStructureMembers().findMember("nested2");
    ArrayStructure nested2Data = nested1Data.getArrayStructure(6, nested2);

    // get h1 out of the 4th "nested2"
    StructureMembers.Member h1 = nested2Data.getStructureMembers().findMember("h1");
    int val = nested2Data.getScalarInt(4, h1);
    assert (val == 264);
  }


  public ArrayStructure makeNested1(StructureMembers.Member parent) throws IOException, InvalidRangeException {
    StructureMembers members = new StructureMembers(parent.getName());
    parent.setStructureMembers(members);

    StructureMembers.Member m = members.addMember("g1", "desc", CDM.UNITS, DataType.INT, new int[]{1});
    Array data = Array.factory(DataType.INT, new int[]{4, 9});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("g2", "desc", CDM.UNITS, DataType.DOUBLE, new int[]{2});
    data = Array.factory(DataType.DOUBLE, new int[]{4, 9, 2});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("g3", "desc", CDM.UNITS, DataType.DOUBLE, new int[]{3, 4});
    data = Array.factory(DataType.DOUBLE, new int[]{4, 9, 3, 4});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("nested2", "desc", CDM.UNITS, DataType.STRUCTURE, new int[]{7});
    data = makeNested2(m);
    m.setDataArray(data);

    return new ArrayStructureMA(members, new int[]{4, 9});
  }

  public ArrayStructure makeNested2(StructureMembers.Member parent) throws IOException, InvalidRangeException {
    StructureMembers members = new StructureMembers(parent.getName());
    parent.setStructureMembers(members);

    StructureMembers.Member m = members.addMember("h1", "desc", CDM.UNITS, DataType.INT, new int[]{1});
    Array data = Array.factory(DataType.INT, new int[]{4, 9, 7});
    m.setDataArray(data);
    fill(data);

    m = members.addMember("h2", "desc", CDM.UNITS, DataType.DOUBLE, new int[]{2});
    data = Array.factory(DataType.DOUBLE, new int[]{4, 9, 7, 2});
    m.setDataArray(data);
    fill(data);

    return new ArrayStructureMA(members, new int[]{4, 9, 7});
  }
 

See Also:

Array

Nested Class Summary

Nested classes/interfaces inherited from class ucar.ma2.ArrayStructure

ArrayStructure.ArrayStructureIterator

Field Summary

Fields inherited from class ucar.ma2.ArrayStructure

members, nelems, sdata

Fields inherited from class ucar.ma2.Array

indexCalc, rank, unsigned

Constructor Summary

Constructors

Constructor and Description
ArrayStructureMA(StructureMembers members, int[] shape) Create a new Array of type StructureData and the given members and shape.
ArrayStructureMA(StructureMembers members, int[] shape, StructureData[] sdata)

Method Summary

Modifier and Type	Method and Description
static ArrayStructureMA	factoryMA(ArrayStructure from) Turn any ArrayStructure into a ArrayStructureMA
static ArrayStructureMA	factoryMA(Structure from, int[] shape) Create an ArrayStructure for a Structure.
protected StructureData	makeStructureData(ArrayStructure as, int index)
void	setMemberArray(java.lang.String memberName, Array data) Set the data array for this member.

Methods inherited from class ucar.ma2.ArrayStructure

convertScalarDouble, convertScalarFloat, convertScalarInt, convertScalarLong, copy, copyBytes, copyChars, copyDoubles, copyFloats, copyFrom1DJavaArray, copyInts, copyLongs, copyObjects, copySequences, copyShorts, copyStructures, copyTo1DJavaArray, createView, extractMemberArray, findMember, getArray, getArrayObject, getArraySequence, getArrayStructure, getBoolean, getBoolean, getByte, getByte, getChar, getChar, getDouble, getDouble, getElementType, getFloat, getFloat, getInt, getInt, getJavaArrayByte, getJavaArrayChar, getJavaArrayDouble, getJavaArrayFloat, getJavaArrayInt, getJavaArrayLong, getJavaArrayShort, getJavaArrayString, getLong, getLong, getMembers, getObject, getObject, getScalarByte, getScalarChar, getScalarDouble, getScalarFloat, getScalarInt, getScalarLong, getScalarObject, getScalarShort, getScalarString, getScalarStructure, getShort, getShort, getSizeBytes, getStorage, getStructureData, getStructureData, getStructureDataIterator, getStructureMemberNames, getStructureMembers, getStructureSize, sectionNoReduce, setBoolean, setBoolean, setByte, setByte, setChar, setChar, setDouble, setDouble, setFloat, setFloat, setInt, setInt, setLong, setLong, setMemberArray, setObject, setObject, setShort, setShort, showInternal, showInternalMembers

Methods inherited from class ucar.ma2.Array

arraycopy, copyTo1DJavaArray, copyToNDJavaArray, factory, factory, factory, factory, factory, factory, factoryConstant, flip, get1DJavaArray, getDataAsByteBuffer, getDataAsByteBuffer, getDataAsByteBuffer, getDataType, getIndex, getIndexIterator, getIndexIteratorFast, getIndexPrivate, getRangeIterator, getRank, getShape, getSize, hasNext, isConstant, isUnsigned, makeArray, makeArray, makeArray, makeArray, makeArrayRankPlusOne, next, nextBoolean, nextByte, nextChar, nextDouble, nextFloat, nextInt, nextLong, nextShort, permute, reduce, reduce, resetLocalIterator, reshape, reshapeNoCopy, section, section, section, sectionNoReduce, setUnsigned, shapeToString, slice, toString, transpose

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ArrayStructureMA

public ArrayStructureMA(StructureMembers members,
                        int[] shape)

Create a new Array of type StructureData and the given members and shape.

You must set the data Arrays on each of the Members, using setDataObject(). These data Arrays contain the data for that member Variable, for all the StructureData. Therefore it has rank one greater that the Members. The extra dimension must be the outermost (slowest varying) dimension. ie, if some member has shape [3,10], the array would have shape [nrows, 3, 10].

Parameters:

members - a description of the structure members

shape - the shape of the Array.

ArrayStructureMA

public ArrayStructureMA(StructureMembers members,
                        int[] shape,
                        StructureData[] sdata)

Method Detail

factoryMA

public static ArrayStructureMA factoryMA(ArrayStructure from)
                                  throws java.io.IOException

Turn any ArrayStructure into a ArrayStructureMA

Parameters:

from - copy from here. If from is a ArrayStructureMA, return it.

Returns:

equivilent ArrayStructureMA

Throws:

java.io.IOException - on error reading a sequence

makeStructureData

protected StructureData makeStructureData(ArrayStructure as,
                                          int index)

Specified by:

makeStructureData in class ArrayStructure

setMemberArray

public void setMemberArray(java.lang.String memberName,
                           Array data)

Set the data array for this member.

Parameters:

memberName - name of member

data - Array for this member.

factoryMA

public static ArrayStructureMA factoryMA(Structure from,
                                         int[] shape)
                                  throws java.io.IOException

Create an ArrayStructure for a Structure. Allow nested Structures. Create the data arrays, and an iterator.

Parameters:

from - copy from here. If from is a ArrayStructureMA, return it.

shape - the shape of the ArrayStructure

Returns:

equivilent ArrayStructureMA

Throws:

java.io.IOException - on error reading a sequence