local.tomas.expr.eval
Class ExpressionContext

java.lang.Object
  local.tomas.expr.eval.ExpressionContext

public class ExpressionContext
extends Object

Context used for expression evaluations. The context is primarily used to store the names of variables with their values.

Author:

tomas

Field Summary

protected Map<String,ExpressionValue>

variableValues Maps variable names to their values.

Constructor Summary

ExpressionContext()
Default constructor.

ExpressionContext(Map<String,ExpressionValue> variableValues)
Construct context from a map of variables.

Method Summary

ExpressionValue

getVariableValue(String name) Get value of variable.

Methods inherited from class java.lang.Object

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

Field Detail

variableValues

protected Map<String,ExpressionValue> variableValues

Maps variable names to their values.

Constructor Detail

ExpressionContext

public ExpressionContext(Map<String,ExpressionValue> variableValues)

Construct context from a map of variables.

Parameters:

variableValues - maps the variable names to their values

ExpressionContext

public ExpressionContext()

Default constructor. No variables are defined.

Method Detail

getVariableValue

public ExpressionValue getVariableValue(String name)
                                 throws ExpressionException

Get value of variable.

Parameters:

name - variable name

Returns:

the value

Throws:

ExpressionException - if variable is undefined