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The NetCDF-Java Library is a Java interface to NetCDF files, as well as to many other types of scientific data formats.
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/*
 * Copyright 1998-2014 University Corporation for Atmospheric Research/Unidata
 *
 *   Portions of this software were developed by the Unidata Program at the
 *   University Corporation for Atmospheric Research.
 *
 *   Access and use of this software shall impose the following obligations
 *   and understandings on the user. The user is granted the right, without
 *   any fee or cost, to use, copy, modify, alter, enhance and distribute
 *   this software, and any derivative works thereof, and its supporting
 *   documentation for any purpose whatsoever, provided that this entire
 *   notice appears in all copies of the software, derivative works and
 *   supporting documentation.  Further, UCAR requests that the user credit
 *   UCAR/Unidata in any publications that result from the use of this
 *   software or in any product that includes this software. The names UCAR
 *   and/or Unidata, however, may not be used in any advertising or publicity
 *   to endorse or promote any products or commercial entity unless specific
 *   written permission is obtained from UCAR/Unidata. The user also
 *   understands that UCAR/Unidata is not obligated to provide the user with
 *   any support, consulting, training or assistance of any kind with regard
 *   to the use, operation and performance of this software nor to provide
 *   the user with any updates, revisions, new versions or "bug fixes."
 *
 *   THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
 *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *   DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
 *   INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 *   FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 *   NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 *   WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
 */
package ucar.ma2;

/**
 * Concrete implementation of ArrayStructure, with data access deferred to the StructureData objects.
 * The StructureData objects may be of any subclass.
 * Using ArrayStructureW and StructureDataW is often the easiest to construct, but not efficient for large arrays
 *  of Structures due to excessive object creation.
 *
 * @author caron
 * @see Array
 */
public class ArrayStructureW extends ArrayStructure {

  /**
   * Create a new Array of type StructureData and the given members and shape.
   * You must completely construct by calling setStructureData()
   *
   * @param members a description of the structure members
   * @param shape   the shape of the Array.
   */
  public ArrayStructureW(StructureMembers members, int[] shape) {
    super(members, shape);
    this.sdata = new StructureData[nelems];
  }

  /**
   * Create a new Array of type StructureData and the given members, shape, and array of StructureData.
   * @param members a description of the structure members
   * @param shape   the shape of the Array.
   * @param sdata   StructureData array, must be
   */
  public ArrayStructureW(StructureMembers members, int[] shape, StructureData[] sdata) {
    super(members, shape);
    if (nelems != sdata.length)
      throw new IllegalArgumentException("StructureData length= "+sdata.length+"!= shape.length="+nelems);
    this.sdata = sdata;
  }

  /**
   * Set one of the StructureData of this ArrayStructure.
   * @param sd set it to this StructureData.
   * @param index which one to set, as an index into 1D backing store.
   */
  public void setStructureData(StructureData sd, int index) {
    sdata[index] = sd;
  }

  protected StructureData makeStructureData( ArrayStructure as, int index) {
    return new StructureDataW( as.getStructureMembers());
  }

  @Override
  public Array getArray(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getArray(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getArray( m.getName());
  }

  @Override
  public double getScalarDouble(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarDouble(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarDouble( m.getName());
  }

  @Override
  public double[] getJavaArrayDouble(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayDouble(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayDouble( m.getName());
  }

  @Override
  public float getScalarFloat(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarFloat(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarFloat( m.getName());
  }

  @Override
  public float[] getJavaArrayFloat(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayFloat(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayFloat( m.getName());
  }

  @Override
  public byte getScalarByte(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarByte(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarByte( m.getName());
  }

  @Override
  public byte[] getJavaArrayByte(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayByte(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayByte( m.getName());
  }

  @Override
  public short getScalarShort(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarShort(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarShort( m.getName());
  }

  @Override
  public short[] getJavaArrayShort(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayShort(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayShort( m.getName());
  }

  @Override
  public int getScalarInt(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarInt(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarInt( m.getName());
  }

  @Override
  public int[] getJavaArrayInt(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayInt(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayInt( m.getName());
  }

  @Override
  public long getScalarLong(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarLong(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarLong( m.getName());
  }

  @Override
  public long[] getJavaArrayLong(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayLong(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayLong( m.getName());
  }

  @Override
  public char getScalarChar(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarChar(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarChar( m.getName());
  }

  @Override
  public char[] getJavaArrayChar(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayChar(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayChar( m.getName());
  }

  @Override
  public String getScalarString(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarString(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarString( m.getName());
  }

  @Override
  public String[] getJavaArrayString(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getJavaArrayString(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getJavaArrayString( m.getName());
  }

  @Override
  public StructureData getScalarStructure(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getScalarStructure(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getScalarStructure( m.getName());
  }

  @Override
  public ArrayStructure getArrayStructure(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getArrayStructure(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getArrayStructure( m.getName());
  }

  @Override
  public ArraySequence getArraySequence(int recnum, StructureMembers.Member m) {
    if (m.getDataArray() != null) return super.getArraySequence(recnum, m);
    StructureData sd = getStructureData(recnum);
    return sd.getArraySequence( m.getName());
  }
}