Package org.yamcs.studio.data.formula

Class FormulaRegistry

java.lang.Object

org.yamcs.studio.data.formula.FormulaRegistry

public class FormulaRegistry
extends Object

The registry to add functions that will be used by the formula parser.

Constructor Summary

Constructors

Constructor	Description
FormulaRegistry()

Method Summary

Modifier and Type	Method	Description
Collection<FormulaFunction>	findFunctions(String functionName, Integer nArguments)	Finds the registered function with the given name and that can accept the given number of arguments.
FormulaFunctionSet	findFunctionSet(String name)	Returns the registered function set with the given name.
VType	findNamedConstant(String constantName)	Returns the value of the constant with the given name
static FormulaRegistry	getDefault()	Returns the default formula registry.
Set<String>	listFunctionSets()	Returns the names of all the registered function sets.
void	registerFormulaFunctionSet(FormulaFunctionSet functionSet)	Registers a formula set.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FormulaRegistry

public FormulaRegistry()

Method Details

getDefault

public static FormulaRegistry getDefault()

Returns the default formula registry.

Returns:

the default registry

registerFormulaFunctionSet

public void registerFormulaFunctionSet(FormulaFunctionSet functionSet)

Registers a formula set.

Parameters:

functionSet - a formula set

listFunctionSets

public Set<String> listFunctionSets()

Returns the names of all the registered function sets.

Returns:

the names of the registered function sets

findFunctionSet

public FormulaFunctionSet findFunctionSet(String name)

Returns the registered function set with the given name.

Parameters:

name - the function set name

Returns:

the set or null

findFunctions

public Collection<FormulaFunction> findFunctions(String functionName,
 Integer nArguments)

Finds the registered function with the given name and that can accept the given number of arguments.

Parameters:

functionName - the name of the function

nArguments - the number of the arguments

Returns:

the matched functions

findNamedConstant

public VType findNamedConstant(String constantName)

Returns the value of the constant with the given name

Parameters:

constantName - the constant name

Returns:

the value of the name