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Class Summary
| Class |
Description |
| FormulaManager |
The FormulaManager class is the gateway into the visad.formula package,
a general-purpose formula parser and evaluator.
|
| FormulaUtil |
Contains a variety of useful methods related to the
visad.formula package.
|
| FormulaVar |
Represents a variable.
|
| VMethod |
Thing wrapper for java.lang.reflect.Method.
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| VRealType |
Thing wrapper for visad.RealType.
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Exception Summary
| Exception |
Description |
| FormulaException |
The type of exception thrown by the formula package.
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Package visad.formula Description
Provides an interface for automatically evaluating formulas based on
user-defined operators and functions.
The VisAD formula package is accessed through the FormulaManager class.
The constructor for the FormulaManager class takes user-defined operators,
operator precedences, and functions as arguments. Then, variables can be
bound to pre-existing ThingReferences with the FormulaManager.createVar()
method, bound to formulas with the FormulaManager.assignFormula() method,
or set directly with the FormulaManager.setThing() method.
The FormulaManager.getThing() method returns the current value of a
variable, and the FormulaManager.remove() method deletes a variable.
Variables update automatically when the variables upon which they depend
change. For an example of usage, see the visad.ss package.