ucar.ma2
Class ArrayStructureMA

java.lang.Object
  extended by ucar.ma2.Array
      extended by ucar.ma2.ArrayStructure
          extended by 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);
   
Example code:
  public void testMA() throws IOException, InvalidRangeException {
    StructureMembers members = new StructureMembers("s");

    StructureMembers.Member m = members.addMember("f1", "desc", "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", "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", "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", "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", "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", "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", "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", "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", "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});
  }
 

Author:
caron
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
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
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(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, copyInts, copyLongs, copyObjects, copySequences, copyShorts, copyStructures, 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, 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, getIndex, getIndexIterator, getIndexIteratorFast, getIndexPrivate, getRangeIterator, getRank, getShape, getSize, hasNext, isConstant, isUnsigned, makeArray, makeArray, makeArray, next, nextBoolean, nextByte, nextChar, nextDouble, nextFloat, nextInt, nextLong, nextShort, permute, reduce, reduce, resetLocalIterator, reshape, reshapeNoCopy, section, section, section, sectionNoReduce, 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 IOException
Turn any ArrayStructure into a ArrayStructureMA

Parameters:
from - copy from here. If from is a ArrayStructureMA, return it.
Returns:
equivilent ArrayStructureMA
Throws:
IOException - on error reading a sequence

makeStructureData

protected StructureData makeStructureData(ArrayStructure as,
                                          int index)
Specified by:
makeStructureData in class ArrayStructure

setMemberArray

public void setMemberArray(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 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:
IOException - on error reading a sequence


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