net.christopherschultz.evaluator.parser
Class ExpressionParser

java.lang.Object
  net.christopherschultz.evaluator.parser.ExpressionParser

public class ExpressionParser
extends Object

A parser to convert string expressions into Expression objects for subsequent evaluation.

Version:

$Revision: 1.4 $ $Date: 2009-04-09 16:02:58 $

Author:

Chris Schultz

See Also:

Expression

Constructor Summary

ExpressionParser()
Creates a new ExpressionParser.

Method Summary

Expression	parse(String expression) Parses the given string expression into a tree of evaluatable Expression objects.
static Expression	parseExpression(String expression) A convenience method to create a new ExpressionParser and return an Expression object for that expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionParser

public ExpressionParser()

Creates a new ExpressionParser.

Method Detail

parse

public Expression parse(String expression)
                 throws ParseException

Parses the given string expression into a tree of evaluatable Expression objects.

Parameters:

expression - The string expression to parse.

Returns:

An Expression object which is the root of an expression evaluation tree.

Throws:

ParseException - If the expression was not parsable.

parseExpression

public static Expression parseExpression(String expression)
                                  throws ParseException

A convenience method to create a new ExpressionParser and return an Expression object for that expression.

Parameters:

expression - The string expression to parse.

Returns:

An Expression object which is the root of an expression evaluation tree.

Throws:

ParseException - If the expression was not parsable.