Package edu.cmu.tetrad.calculator.parser

Class ExpressionParser

java.lang.Object

edu.cmu.tetrad.calculator.parser.ExpressionParser

public class ExpressionParser
extends Object

Parses a string into a tree-like expression.

Version:

$Id: $Id

Author:

Tyler Gibson

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ExpressionParser.RestrictionType	The type of restriction on parameters.

Constructor Summary

Constructors

Constructor	Description
ExpressionParser()	Constructrs a parser that has no allowable parameters.
ExpressionParser(Collection<String> parameters, ExpressionParser.RestrictionType type)	Constructs the parser given a collection of allowable parameters.

Method Summary

Modifier and Type	Method	Description
int	getNextOffset()	getNextOffset.
List<String>	getParameters()	Getter for the field parameters.
Equation	parseEquation(String equation)	Parses an equation of the form Variable = Expression.
Expression	parseExpression(String expression)	Parses the given expression, or throws an exception if its not possible.

Methods inherited from class java.lang.Object

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

Constructor Details

ExpressionParser

public ExpressionParser()

Constructrs a parser that has no allowable parameters.

ExpressionParser

public ExpressionParser(Collection<String> parameters,
 ExpressionParser.RestrictionType type)

Constructs the parser given a collection of allowable parameters.

Parameters:

parameters - a Collection object

type - a ExpressionParser.RestrictionType object

Method Details

parseExpression

public Expression parseExpression(String expression)
                           throws ParseException

Parses the given expression, or throws an exception if its not possible.

Parameters:

expression - a String object

Returns:

a Expression object

Throws:

ParseException - if any.

parseEquation

public Equation parseEquation(String equation)
                       throws ParseException

Parses an equation of the form Variable = Expression.

Parameters:

equation - a String object

Returns:

a Equation object

Throws:

ParseException - if any.

getNextOffset

public int getNextOffset()

getNextOffset.

Returns:

a int

getParameters

public List<String> getParameters()

Getter for the field parameters.

Returns:

a List object