Examples of ucar.ma2.StructureData

ucar.ma2.StructureData
A container for a Structure's data. Is normally contained within an ArrayStructure, which is an Array of StructureData. This is the abstract supertype for all implementations.
```
 for (Iterator iter = sdata.getMembers().iterator(); iter.hasNext(); ) { StructureMembers.Member m = (StructureMembers.Member) iter.next(); Array sdataArray = sdata.getArray(m); ... } 
```
General ways to access data in an StructureData are:
```
 Array getArray(Member m) 
```
```
 Array getArray(String memberName) 
```
The following will return an object of type Byte, Char, Double, Float, Int, Long, Short, String, or Structure, depending upon the member type:
```
 Object getScalarObject( Member m) 
```
A number of convenience routines may be able to avoid extra Object creation, and so are recommended for efficiency. These require that you know the data types of the member data, but they are the most efficent:
```
 getScalarXXX(int recnum, Member m) getJavaArrayXXX(int recnum, Member m) 
```
where XXX is Byte, Char, Double, Float, Int, Long, Short, or String. For members that are themselves Structures, the equivilent is:
```
 StructureData getScalarStructure(int recnum, Member m) ArrayStructure getArrayStructure(int recnum, Member m) 
```
These will return any compatible type as a double or float, but may have extra overhead when the types dont match:
```
 convertScalarXXX(int recnum, Member m) convertJavaArrayXXX(int recnum, Member m) 
```
where XXX is Double or Float @author caron @see ArrayStructure

  public boolean hasNext() { // have to actually fetch the thing here
    if (totalNelemsDone >= totalNelems) return false;


    if ((index == null) || !index.hasNext()) { // get new data node
      try {
        Section dataSection;
        DataChunk dataChunk;


        while (true) { // look for intersecting sections


          if (!chunkIterator.hasNext()) {
            next = null;
            return false;
          }


          // get next dataChunk
          try {
            dataChunk = chunkIterator.next();
          } catch (IOException e) {
            e.printStackTrace();
            next = null;
            return false;
          }


          // make the dataSection for this chunk
          dataSection = new Section(dataChunk.offset, chunkSize);
          if (dataSection.intersects(want)) // does it intersect ?
            break;
        }


        if (debug)
          System.out.println(" found intersecting section: " + dataSection + " for filePos " + dataChunk.filePos);

View Full Code Here

  public boolean hasNext() { // have to actually fetch the thing
    if (totalNelemsDone >= totalNelems) return false;


    if ((index == null) || !index.hasNext()) { // get new data node
      try {
        Section dataSection;
        DataChunk dataChunk;


        while (true) { // look for intersecting sections
          if (!chunkIterator.hasNext()) {
            next = null;
            return false;
          }


          // get next dataChunk
          try {
            dataChunk = chunkIterator.next();
          } catch (IOException e) {
            e.printStackTrace();
            next = null;
            return false;
          }


          // make the dataSection for this chunk
          dataSection = new Section(dataChunk.getOffset(), chunkSize);
          if (debugIntersection)
            System.out.println(" test intersecting: " + dataSection + " want: " + want);
          if (dataSection.intersects(want)) // does it intersect ?
            break;
        }


        if (debug)
          System.out.println(" found intersecting dataSection: " + dataSection+" intersect= "+dataSection.intersect(want));


        index = new IndexChunkerTiled(dataSection, want); // new indexer into this chunk
        next = new Chunk( dataChunk.getByteBuffer()); // this does the uncompression


      } catch (InvalidRangeException e) {

View Full Code Here

    this.done = 0;


    // LOOK - need test for "all" common case


    // The actual wanted data we can get from this section
    Section intersect = dataSection.intersect(wantSection);
    this.total = intersect.computeSize();
    if (total <= 0) {
      System.out.println("hey");
    }
    assert total > 0;
    int varRank = intersect.getRank();


    // create the List<Dim>
    // Section shifted = intersect.shiftOrigin(dataSection); // want reletive to dataSection
    int wantStride = 1;
    int dataStride = 1;
    for (int ii = varRank - 1; ii >= 0; ii--) {
      Range dr = dataSection.getRange(ii);
      Range wr = wantSection.getRange(ii);
      Range ir = intersect.getRange(ii);
      dimList.add(new Dim(dr, wr, ir, dataStride, wantStride)); // note reversed : fastest first
      dataStride *= dr.length();
      wantStride *= wr.length();
    }

View Full Code Here

      NetcdfFile ncfile = TestH5.open(filename);
      //System.out.println("\n"+ncfile);


      for (Variable v : ncfile.getVariables()) {
        if (v.getSize() > max_size) {
          Section s = makeSubset(v);
          System.out.println("  Try to read variable " + v.getNameAndDimensions() + " size= " + v.getSize() + " section= " + s);
          v.read(s);
        } else {
          System.out.println("  Try to read variable " + v.getNameAndDimensions() + " size= " + v.getSize());
          v.read();

View Full Code Here


  static int max_size = 1000 * 1000 * 10;
  static Section makeSubset(Variable v) throws InvalidRangeException {
    int[] shape = v.getShape();
    shape[0] = 1;
    Section s = new Section(shape);
    long size = s.computeSize();
    shape[0] = (int) Math.max(1, max_size / size);
    return new Section(shape);
  }

View Full Code Here

    if (null == axis) throw new IllegalArgumentException("There is no GeoZ coordinate");
    return readValue( axis, fromVar, index);
  }


  public double readValue(Variable targetVar, Variable fromVar, int[] index) throws InvalidRangeException, IOException {
    Section axisElement = mapIndex( targetVar, fromVar, index);
    Array result = targetVar.read(axisElement);
    return result.nextDouble();
  }

View Full Code Here

  }


  public Section mapIndex(Variable targetVar, Variable fromVar, int[] fromIndex) throws InvalidRangeException {
    List<Dimension> toDims = targetVar.getDimensions();
    List<Dimension> fromDims = fromVar.getDimensions();
    Section result = new Section();


    // each dimension in the target must be present in the source
    for (int i=0; i<toDims.size(); i++) {
      Dimension dim = toDims.get(i);
      int varIndex = fromDims.indexOf(toDims.get(i));
      if (varIndex < 0) throw new IllegalArgumentException("Dimension "+dim+" does not exist");
      result.appendRange(fromIndex[varIndex], fromIndex[varIndex]);
    }
    return result;
  }

View Full Code Here

      if (s == null) return;


      DataIterator iter = sod.getDataIterator(s);
      while (iter.hasNext()) {
        StationObsDatatype dtype = (StationObsDatatype) iter.nextData();
        StructureData sdata = dtype.getData();
        if (p.match(sdata)) {
          a.act(sdata);
          limit.matches++;
        }

View Full Code Here


      DataIterator iter = dataset.getDataIterator(0);
      while (iter.hasNext()) {
        PointObsDatatype pobs = (PointObsDatatype) iter.nextData();


        StructureData sdata = pobs.getData();
        if (p.match(sdata)) {
          a.act(sdata);
          limit.matches++;
        }

View Full Code Here

    }


    StructureDataIterator siter = record.getStructureIterator();
    int count = 0;
    while (siter.hasNext()) {
      StructureData sdata = siter.next();
      List<StructureMembers.Member> sm = sdata.getMembers();
      for (StructureMembers.Member m : sm) {
        MetarField f = MetarField.fields.get(m.getName());
        if (null != f) f.sum( sdata, m);
      }
      count++;

View Full Code Here

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