com.wewebu.expression.language

Class OwExprBinaryExpression

java.lang.Object

com.wewebu.expression.language.OwExprExpression

com.wewebu.expression.language.OwExprBinaryExpression

public class OwExprBinaryExpression
extends OwExprExpression

Binary expression implementation (a left-operand-operator-right-operand expression).

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All rights reserved.

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Field Summary

Fields inherited from class com.wewebu.expression.language.OwExprExpression

m_errorTable, m_symbolTable, m_typeError

Constructor Summary

Constructors

Constructor and Description
OwExprBinaryExpression(OwExprSymbolTable symTable_p, OwExprErrorTable errorTable_p, OwExprExpression operand1_p, OwExprBinaryOperator operator_p, OwExprExpression operand2_p) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
OwExprValue	evaluate(OwExprScope scope_p) Evaluates this expression on the OwExprScope (scope) provided as argument.
String	toString()
OwExprExpressionType	type() Type check method.

Methods inherited from class com.wewebu.expression.language.OwExprExpression

errCount, evaluate, evaluate, getErrorTable, getSymbol, getSymbolTable, hasErrors, initType, symbolsVisibleInScopes

Methods inherited from class java.lang.Object

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

Constructor Detail

OwExprBinaryExpression

public OwExprBinaryExpression(OwExprSymbolTable symTable_p,
                      OwExprErrorTable errorTable_p,
                      OwExprExpression operand1_p,
                      OwExprBinaryOperator operator_p,
                      OwExprExpression operand2_p)

Constructor

Parameters:

symTable_p - global symbol table

errorTable_p - global error table

operand1_p - left side operand

operator_p - operator

operand2_p - right side operand

Method Detail

evaluate

public OwExprValue evaluate(OwExprScope scope_p)
                     throws OwExprEvaluationException

Evaluates this expression on the OwExprScope (scope) provided as argument.

Specified by:

evaluate in class OwExprExpression

Parameters:

scope_p - external scope to be used during evaluation

Returns:

the value resulted from the evaluation of this expression

Throws:

OwExprEvaluationException - in case of evaluation failure

type

public OwExprExpressionType type()
                          throws OwExprTypeMissmatchException

Type check method. If type errors are encountered during type computation the OwExprExpression.m_typeError should be set to true

Specified by:

type in class OwExprExpression

Returns:

the expression type for this expression

Throws:

OwExprTypeMissmatchException - if type errors are ecountrede during type computation

toString

public String toString()

Overrides:

toString in class Object