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/*
 * Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
 * See LICENSE for license information.
 */
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];
  }

  // wrap a StructureDatain an ArrrayStructure
  public ArrayStructureW(StructureData sdata) {
    super(sdata.getStructureMembers(), new int[] {1});
    this.sdata = new StructureData[1];
    this.sdata[0] = sdata;
  }

  /**
   * 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());
  }
}