/*
 * 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.nc2.dataset;

import ucar.nc2.Group;
import ucar.ma2.StructureDataIterator;
import ucar.ma2.StructureData;
import ucar.ma2.Array;

import java.io.IOException;

/**
 * Enhance sequence
 *
 * @author caron
 * @since Nov 10, 2009
 */
public class SequenceDS extends StructureDS {
  private ucar.nc2.Sequence orgSeq;

  public SequenceDS(Group g, ucar.nc2.Sequence orgSeq) {
    super(g, orgSeq);
    this.orgSeq = orgSeq;
  }

  public StructureDataIterator getStructureIterator(int bufferSize) throws java.io.IOException {
    return new StructureDataConverter(this, orgSeq.getStructureIterator(bufferSize));
  }

  private static class StructureDataConverter implements StructureDataIterator {
    private StructureDataIterator orgIter;
    private SequenceDS newStruct;
    private int count = 0;

    StructureDataConverter(SequenceDS newStruct, StructureDataIterator orgIter) {
      this.newStruct = newStruct;
      this.orgIter = orgIter;
    }

    @Override
    public boolean hasNext() throws IOException {
      return orgIter.hasNext();
    }

    @Override
    public StructureData next() throws IOException {
      StructureData sdata = orgIter.next();
      return newStruct.convert(sdata, count++);
    }

    @Override
    public void setBufferSize(int bytes) {
      orgIter.setBufferSize(bytes);
    }

    @Override
    public StructureDataIterator reset() {
      orgIter = orgIter.reset();
      return (orgIter == null) ? null : this;
    }

    @Override
    public int getCurrentRecno() {
      return orgIter.getCurrentRecno();
    }

    @Override
      public void finish() {
        orgIter.finish();
      }
  }

  @Override
  public Array read(ucar.ma2.Section section) throws java.io.IOException, ucar.ma2.InvalidRangeException {
    return read();
  }

  @Override
  public Array read() throws IOException {
    Array data = orgSeq.read();
    return convert(data, null);
  }

}