ru.biosoft.math.model
Class AstFunctionDeclaration

java.lang.Object
  ru.biosoft.math.model.SimpleNode
      ru.biosoft.math.model.AstFunctionDeclaration

All Implemented Interfaces:

Function, Node, ParserContext

public class AstFunctionDeclaration

extends SimpleNode

implements ParserContext, Function

Function declaration, it corresponds lambda element in MathML. Function declaration syntax is following:

 FunctionDeclaration ::= ( "function" Identifier "(" ArgumentDeclaration ( "," ArgumentDeclaration )* ")"  Expression )
 

Example:

 function f(x, y) = sin(x) + cos(y); 

Parser contex issues: Linear parser checks whether the function uses declared variables, for this purpose it uses its own parser context.

Field Summary

protected java.util.HashMap

variablesMap

Fields inherited from class ru.biosoft.math.model.SimpleNode

children, id

Fields inherited from interface ru.biosoft.math.model.Function

ASSIGNMENT_PRIORITY, FUNCTION_PRIORITY, LOGICAL_PRIORITY, PLUS_PRIORITY, POWER_PRIORITY, RELATIONAL_PRIORITY, TIMES_PRIORITY, UNARY_PRIORITY

Constructor Summary

AstFunctionDeclaration(int id)

Method Summary

boolean	containsConstant(java.lang.String name)
boolean	containsVariable(java.lang.String name)
void	declareConstant(java.lang.String name, java.lang.Object value) Declares the constant.
void	declareFunction(Function function) Declares the function.
void	declareVariable(java.lang.String name, java.lang.Object value) Declares the variable.
java.lang.Object	getConstantValue(java.lang.String name) Returns the constant value or null if constant not declared.
Function	getFunction(java.lang.String name) Returns function or operator with the specified name or null if function is not declared.
java.lang.String	getName() Returns the name of the node (operator symbol or function name).
int	getNumberOfParameters() Returns the number of required parameters, or -1 if any number of parameters is allowed.
int	getPriority() Returns the function or operator priority.
java.lang.Object	getVariableValue(java.lang.String name) Returns value of variable with the specified name or null if variable is not declared.
void	init(ParserContext parent)
void	setName(java.lang.String name)
java.lang.String	toString()

Methods inherited from class ru.biosoft.math.model.SimpleNode

dump, dump, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtReplaceChild, jjtSetParent, toString

Methods inherited from class java.lang.Object

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

Field Detail

variablesMap

protected java.util.HashMap variablesMap

Constructor Detail

AstFunctionDeclaration

public AstFunctionDeclaration(int id)

Method Detail

getName

public java.lang.String getName()

Description copied from interface: Function

Returns the name of the node (operator symbol or function name).

Specified by:

getName in interface Function

setName

public void setName(java.lang.String name)

getPriority

public int getPriority()

Description copied from interface: Function

Returns the function or operator priority.

Specified by:

getPriority in interface Function

getNumberOfParameters

public int getNumberOfParameters()

Description copied from interface: Function

Returns the number of required parameters, or -1 if any number of parameters is allowed.

Specified by:

getNumberOfParameters in interface Function

toString

public java.lang.String toString()

init

public void init(ParserContext parent)

containsConstant

public boolean containsConstant(java.lang.String name)

Specified by:

containsConstant in interface ParserContext

getConstantValue

public java.lang.Object getConstantValue(java.lang.String name)

Description copied from interface: ParserContext

Returns the constant value or null if constant not declared.

Specified by:

getConstantValue in interface ParserContext

declareConstant

public void declareConstant(java.lang.String name,
                            java.lang.Object value)

Description copied from interface: ParserContext

Declares the constant.

Specified by:

declareConstant in interface ParserContext

containsVariable

public boolean containsVariable(java.lang.String name)

Specified by:

containsVariable in interface ParserContext

getVariableValue

public java.lang.Object getVariableValue(java.lang.String name)

Description copied from interface: ParserContext

Returns value of variable with the specified name or null if variable is not declared.

Specified by:

getVariableValue in interface ParserContext

declareVariable

public void declareVariable(java.lang.String name,
                            java.lang.Object value)

Description copied from interface: ParserContext

Declares the variable.

Specified by:

declareVariable in interface ParserContext

getFunction

public Function getFunction(java.lang.String name)

Description copied from interface: ParserContext

Returns function or operator with the specified name or null if function is not declared.

Specified by:

getFunction in interface ParserContext

declareFunction

public void declareFunction(Function function)

Description copied from interface: ParserContext

Declares the function.

Specified by:

declareFunction in interface ParserContext