Example #1
0
  /** Create a DAS for this netcdf file */
  NcDAS(NetcdfFile ncfile) {

    // Variable attributes
    Iterator iter = ncfile.getVariables().iterator();
    while (iter.hasNext()) {
      Variable v = (Variable) iter.next();
      doVariable(v, null);
    }

    // Global attributes
    opendap.dap.AttributeTable gtable = new opendap.dap.AttributeTable("NC_GLOBAL");
    int count = addAttributes(gtable, null, ncfile.getGlobalAttributes().iterator());
    if (count > 0)
      try {
        addAttributeTable("NC_GLOBAL", gtable);
      } catch (AttributeExistsException e) {
        log.error("Cant add NC_GLOBAL", e);
      }

    // unlimited  dimension
    iter = ncfile.getDimensions().iterator();
    while (iter.hasNext()) {
      Dimension d = (Dimension) iter.next();
      if (d.isUnlimited()) {
        opendap.dap.AttributeTable table = new opendap.dap.AttributeTable("DODS_EXTRA");
        try {
          table.appendAttribute("Unlimited_Dimension", opendap.dap.Attribute.STRING, d.getName());
          addAttributeTable("DODS_EXTRA", table);
        } catch (Exception e) {
          log.error("Error adding Unlimited_Dimension =" + e);
        }
        break;
      }
    }

    // unused dimensions
    opendap.dap.AttributeTable dimTable = null;
    iter = ncfile.getDimensions().iterator();
    while (iter.hasNext()) {
      Dimension d = (Dimension) iter.next();
      if (null == usedDims.get(d.getName())) {
        if (dimTable == null) dimTable = new opendap.dap.AttributeTable("EXTRA_DIMENSION");
        try {
          dimTable.appendAttribute(
              d.getName(), opendap.dap.Attribute.INT32, Integer.toString(d.getLength()));
        } catch (Exception e) {
          log.error("Error adding Unlimited_Dimension =" + e);
        }
      }
    }
    if (dimTable != null)
      try {
        addAttributeTable("EXTRA_DIMENSION", dimTable);
      } catch (AttributeExistsException e) {
        log.error("Cant add EXTRA_DIMENSION", e);
      }
  }
Example #2
0
  private int addAttributes(opendap.dap.AttributeTable table, Variable v, Iterator iter) {
    int count = 0;

    // add attribute table for this variable
    while (iter.hasNext()) {
      Attribute att = (Attribute) iter.next();
      int dods_type = DODSNetcdfFile.convertToDODSType(att.getDataType(), false);

      try {
        String attName = NcDDS.escapeName(att.getName());
        if (att.isString()) {
          /* FIX String value = escapeAttributeStringValues(att.getStringValue());
          table.appendAttribute(attName, dods_type, "\""+value+"\"");
          */
          table.appendAttribute(attName, dods_type, att.getStringValue());
        } else {
          // cant send signed bytes
          if (att.getDataType() == DataType.BYTE) {
            boolean signed = false;
            for (int i = 0; i < att.getLength(); i++) {
              if (att.getNumericValue(i).byteValue() < 0) signed = true;
            }
            if (signed) // promote to signed short
            dods_type = opendap.dap.Attribute.INT16;
          }

          for (int i = 0; i < att.getLength(); i++)
            table.appendAttribute(attName, dods_type, att.getNumericValue(i).toString());
        }
        count++;

      } catch (Exception e) {
        log.error(
            "Error appending attribute " + att.getName() + " = " + att.getStringValue() + "\n" + e);
      }
    } // loop over variable attributes

    // kludgy thing to map char arrays to DODS Strings
    if ((v != null) && (v.getDataType().getPrimitiveClassType() == char.class)) {
      int rank = v.getRank();
      int strlen = (rank == 0) ? 0 : v.getShape(rank - 1);
      Dimension dim = (rank == 0) ? null : v.getDimension(rank - 1);
      try {
        opendap.dap.AttributeTable dodsTable = table.appendContainer("DODS");
        dodsTable.appendAttribute("strlen", opendap.dap.Attribute.INT32, Integer.toString(strlen));
        if ((dim != null) && dim.isShared())
          dodsTable.appendAttribute("dimName", opendap.dap.Attribute.STRING, dim.getName());
        count++;
      } catch (Exception e) {
        log.error("Error appending attribute strlen\n" + e);
      }
    }

    return count;
  }
Example #3
0
  private void doVariable(Variable v, opendap.dap.AttributeTable parentTable) {

    List dims = v.getDimensions();
    for (int i = 0; i < dims.size(); i++) {
      Dimension dim = (Dimension) dims.get(i);
      if (dim.isShared()) usedDims.put(dim.getName(), dim);
    }

    // if (v.getAttributes().size() == 0) return; // LOOK DAP 2 say must have empty

    String name = NcDDS.escapeName(v.getShortName());
    opendap.dap.AttributeTable table;

    if (parentTable == null) {
      table = new opendap.dap.AttributeTable(name);
      try {
        addAttributeTable(name, table);
      } catch (AttributeExistsException e) {
        log.error("Cant add " + name, e);
      }
    } else {
      table = parentTable.appendContainer(name);
    }

    addAttributes(table, v, v.getAttributes().iterator());

    if (v instanceof Structure) {
      Structure s = (Structure) v;
      List nested = s.getVariables();
      for (int i = 0; i < nested.size(); i++) {
        Variable nv = (Variable) nested.get(i);
        doVariable(nv, table);
      }
    }
  }