Package com.bayesserver

Class FunctionVariableExpression

java.lang.Object

com.bayesserver.FunctionVariableExpression

All Implemented Interfaces:

Expression, QueryExpression, Cloneable

public final class FunctionVariableExpression
extends Object
implements QueryExpression, Cloneable

An expression that can be used in a function node/variable.

Constructor Summary

Constructors

Constructor	Description
FunctionVariableExpression(String text, ExpressionReturnType returnType)	Creates a new function node expression.

Method Summary

Modifier and Type	Method	Description
Expression	copy()	Creates a copy of the expression.
Variable	getOwner()	Gets the current owner, if assigned to a variable.
ExpressionReturnType	getReturnType()	Gets the return type of the expression.
String	getText()	Gets the expression text.
void	setReturnType(ExpressionReturnType value)
void	setText(String value)	Sets the expression text.
static void	validateSyntax(String expr)	Validates the syntax of a function expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionVariableExpression

public FunctionVariableExpression(String text,
                                  ExpressionReturnType returnType)

Creates a new function node expression.

Parameters:

text - The expression text.

returnType - The return type of the expression.

Method Detail

copy

public Expression copy()

Creates a copy of the expression. The new expression will not have an owner.

Specified by:

copy in interface Expression

Returns:

A copy of the expression.

validateSyntax

public static void validateSyntax(String expr)

Validates the syntax of a function expression. This method only checks the syntax, and does not ensure the expression will evaluate without errors.

Parameters:

expr - The expression string to test.

getText

public String getText()

Gets the expression text.

Specified by:

getText in interface Expression

setText

public void setText(String value)

Sets the expression text.

Specified by:

setText in interface Expression

getOwner

public Variable getOwner()

Gets the current owner, if assigned to a variable. An expression cannot be modified when it is assigned to a variable.

Specified by:

getOwner in interface QueryExpression

getReturnType

public ExpressionReturnType getReturnType()

Gets the return type of the expression.

Specified by:

getReturnType in interface Expression

setReturnType

public void setReturnType(ExpressionReturnType value)