com.wewebu.expression.language

Class OwExprConditionalExpression

java.lang.Object

com.wewebu.expression.language.OwExprExpression

com.wewebu.expression.language.OwExprConditionalExpression

public class OwExprConditionalExpression
extends OwExprExpression

The short conditional expression parsing result :
1+b>a?'ok':'nok'
1+b>a is the test expression
'ok' is the true expression
'nok' is the false expression

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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
OwExprConditionalExpression(OwExprSymbolTable symbolTable_p, OwExprErrorTable errorTable_p, OwExprExpression test_p, OwExprExpression trueExpression_p, OwExprExpression falseExpression_p) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
OwExprValue	evaluate(OwExprScope scope_p) Evaluates this expression : If the m_test expression results in a OwExprBooleanValue equal to OwExprBooleanValue.TRUE than the m_trueExpression is evaluated end the result returned otherwise the m_falseExpression expression is evaluated and the result returned.
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

OwExprConditionalExpression

public OwExprConditionalExpression(OwExprSymbolTable symbolTable_p,
                           OwExprErrorTable errorTable_p,
                           OwExprExpression test_p,
                           OwExprExpression trueExpression_p,
                           OwExprExpression falseExpression_p)

Constructor

Parameters:

symbolTable_p - the global symbol table

errorTable_p - the global error table

test_p - the test expression

trueExpression_p - the true branch expression

falseExpression_p - the false branch expression

Method Detail

evaluate

public OwExprValue evaluate(OwExprScope scope_p)
                     throws OwExprEvaluationException

Evaluates this expression :
If the m_test expression results in a OwExprBooleanValue equal to OwExprBooleanValue.TRUE than the m_trueExpression is evaluated end the result returned otherwise the m_falseExpression expression is evaluated and the result returned.

Specified by:

evaluate in class OwExprExpression

Parameters:

scope_p -

Returns:

the short conditional evaluation result

Throws:

OwExprEvaluationException

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 . The type check is also forced on all dependent expressions m_test,m_trueExpression and m_falseExpression.

Specified by:

type in class OwExprExpression

Returns:

the expression type for this expression

Throws:

OwExprTypeMissmatchException - if type errors are encountered during type computation

toString

public String toString()

Overrides:

toString in class Object