com.igormaznitsa.jcp.expression

Class Expression

java.lang.Object

com.igormaznitsa.jcp.expression.Expression

public class Expression
extends Object

The main class to calculate expressions

Author:

Igor Maznitsa (igor.maznitsa@igormaznitsa.com)

Method Summary

Modifier and Type	Method and Description
Value	eval() Evaluate the expression
static Value	evalExpression(String expression, PreprocessorContext context) Evaluate expression
static Value	evalTree(ExpressionTree tree, PreprocessorContext context) Evaluate an expression tree

Methods inherited from class java.lang.Object

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

Method Detail

eval

public Value eval()

Evaluate the expression

Returns:

the result as a Value object, it can't be null

evalExpression

public static Value evalExpression(String expression,
                                   PreprocessorContext context)

Evaluate expression

Parameters:

expression - the expression as a String, must not be null

context - a preprocessor context to be used for expression operations, it can be null

Returns:

the result as a Value object, it can't be null

evalTree

public static Value evalTree(ExpressionTree tree,
                             PreprocessorContext context)

Evaluate an expression tree

Parameters:

tree - an expression tree, it must not be null

context - a preprocessor context to be used for expression operations, it can be null

Returns:

the result as a Value object, it can't be null