//
// DisplayTupleType.java
//

/*
VisAD system for interactive analysis and visualization of numerical
data.  Copyright (C) 1996 - 2017 Bill Hibbard, Curtis Rueden, Tom
Rink, Dave Glowacki, Steve Emmerson, Tom Whittaker, Don Murray, and
Tommy Jasmin.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA
*/

package visad;

/**
   DisplayTupleType is the class for tuples of DisplayRealType's.

*/
public class DisplayTupleType extends RealTupleType {

  /**
   * construct a DisplayTupleType with null CoordinateSystem
   * @param types array of DisplayRealType to be components
   *              note a DisplayRealType may not be a component
   *              of more than one DisplayTupleType
   * @throws VisADException a VisAD error occurred
   */
  public DisplayTupleType(DisplayRealType[] types) throws VisADException {
    this(types, null);
  }

  /** 
   * construct a DisplayTupleType
   * @param types array of DisplayRealType to be components
   *              note a DisplayRealType may not be a component
   *              of more than one DisplayTupleType
   * @param coord_sys CoordinateSystem; if non-null, its reference
   *                  must be another DisplayTupleType
   * @throws VisADException a VisAD error occurred
   */
  public DisplayTupleType(DisplayRealType[] types, CoordinateSystem coord_sys)
         throws VisADException {
    super(types, coord_sys, null);
    if (coord_sys != null) {
      RealTupleType ref = coord_sys.getReference();
      if (!(ref instanceof DisplayTupleType)) {
        throw new CoordinateSystemException("DisplayTupleType: " +
                    "CoordinateSystem.Reference must be a DisplayTupleType");
      }
      else if (Display.DisplaySpatialOffsetTuple.equals(ref)) {
        throw new CoordinateSystemException("DisplayTupleType: " +
         "CoordinateSystem.Reference cannot be DisplaySpatialOffsetTuple");
      }
      Unit[] default_units = getDefaultUnits();
      Unit[] coord_sys_units = coord_sys.getCoordinateSystemUnits();
      int n = default_units.length;
      boolean match = true;
      for (int i=0; i