/**
* Indicates if a VisAD MathType is compatible with this instance. A RealType is compatible if its
* {@link RealType#equalsExceptNameButUnits} method returns true when given the return value of
* {@link #getRealType()} and if this quantity has no coordinate system transformation. A
* RealTupleType is compatible if its {@link RealTupleType#equalsExceptNameButUnits} method
* returns true when given the return value of {@link #getRealTupleType()} and if the coordinate
* system transformations are compatible. A SetType is compatible if its RealTupleType is
* compatible. A FunctionType is compatible if the MathType of its range is compatible. All other
* MathTypes are incompatible.
*
* @param type The VisAD MathType to examine for compatibility.
* @return <code>true</code> if and only if the MathType is compatible with this instance.
* @throws VisADException VisAD failure.
*/
public boolean isCompatible(MathType type) throws VisADException {
boolean isCompatible;
if (type instanceof RealType) {
isCompatible =
((RealType) type).equalsExceptNameButUnits(realType)
&& (getRealTupleType().getCoordinateSystem() == null);
} else if (type instanceof RealTupleType) {
RealTupleType thisTupleType = getRealTupleType();
RealTupleType thatTupleType = (RealTupleType) type;
if (!thatTupleType.equalsExceptNameButUnits(thisTupleType)) {
isCompatible = false;
} else {
CoordinateSystem thisCS = thisTupleType.getCoordinateSystem();
CoordinateSystem thatCS = thatTupleType.getCoordinateSystem();
isCompatible =
((thisCS == null)
? thatCS == null
: thisCS.getReference().equalsExceptNameButUnits(thatCS.getReference()));
}
} else if (type instanceof SetType) {
isCompatible = isCompatible(((SetType) type).getDomain());
} else if (type instanceof FunctionType) {
isCompatible = isCompatible(((FunctionType) type).getRange());
} else {
isCompatible = false;
}
return isCompatible;
}
/**
* Return <CODE>true</CODE> if <CODE>type</CODE> is legal for this <CODE>DisplayRenderer</CODE>;
* for example, 2-D <CODE>DisplayRenderer</CODE>s use this to disallow mappings to <I>ZAxis</I>
* and <I>Latitude</I>.
*
* @param type The mapping type to check.
* @return <CODE>true</CODE> if <CODE>type</CODE> is legal.
*/
public boolean legalDisplayScalar(DisplayRealType type) {
// First check to see if it is a member of the default list
for (int i = 0; i < Display.DisplayRealArray.length; i++) {
if (Display.DisplayRealArray[i].equals(type)) return true;
}
// if we get here, it's not one of the defaults. See if it has
// a CS that transforms to a default that we know how to handle
if (type.getTuple() != null && type.getTuple().getCoordinateSystem() != null) {
RealTupleType ref = type.getTuple().getCoordinateSystem().getReference();
if (ref.equals(Display.DisplaySpatialCartesianTuple)
|| ref.equals(Display.DisplayRGBTuple)
|| ref.equals(Display.DisplayFlow1Tuple)
|| ref.equals(Display.DisplayFlow2Tuple)) return true;
}
return false;
}
