com.wewebu.expression.language
Class OwExprArraySelectorSuffix

java.lang.Object
  com.wewebu.expression.language.OwExprExpression
      com.wewebu.expression.language.OwExprArraySelectorSuffix

All Implemented Interfaces:

OwExprPrimaryPrefix

public class OwExprArraySelectorSuffix
extends OwExprExpression
implements OwExprPrimaryPrefix

An array selector suffix of a primary expression.
In the expression property[2] the [2] arguments will be parsed into an OwExprArraySelectorSuffix. At evaluation time the property property symbol will be used to perform an indexed property evaluation with the designated index.

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Field Summary

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

m_errorTable, m_symbolTable, m_typeError

Constructor Summary

OwExprArraySelectorSuffix(OwExprSymbolTable symbolTable_p, OwExprErrorTable errorTable_p, OwExprPrimaryPrefix prefix_p, OwExprExpression arraySelector_p)
Constructor

Method Summary

OwExprValue	evaluate(OwExprScope scope_p) Evaluates this expression on the OwExprScope (scope) provided as argument.
OwExprExpression	expression()
OwExprFunctionSymbol	regressToFunction() Forces this primary prefix symbol to a function.
OwExprPropertySymbol	regressToPorperty() Forces this primary prefix symbol to a property.
OwExprSymbolScope	regressToScope() Forces this primary prefix to a scope symbol.
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

OwExprArraySelectorSuffix

public OwExprArraySelectorSuffix(OwExprSymbolTable symbolTable_p,
                                 OwExprErrorTable errorTable_p,
                                 OwExprPrimaryPrefix prefix_p,
                                 OwExprExpression arraySelector_p)

Constructor

Parameters:

symbolTable_p - global symbol table

errorTable_p - global error table

prefix_p - the primary prefix

arraySelector_p - array selector expression

Method Detail

evaluate

public final OwExprValue evaluate(OwExprScope scope_p)
                           throws OwExprEvaluationException

Evaluates this expression on the OwExprScope (scope) provided as argument.
First the prefix is solbed as an scope .
Than the selector expression is evaluated to a numeric value.
Than the indexed value is obtained using OwExprScope.at(int) indexed access method.

Specified by:

evaluate in class OwExprExpression

Parameters:

scope_p - scope to be used during evaluation

Returns:

the value resulted from the evaluation of this function

Throws:

OwExprEvaluationException

type

public OwExprExpressionType type()
                          throws OwExprTypeMissmatchException

Description copied from class: OwExprExpression

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 encountered during type computation

expression

public OwExprExpression expression()

Specified by:

expression in interface OwExprPrimaryPrefix

Returns:

the expression represented by this primary prefix

regressToFunction

public OwExprFunctionSymbol regressToFunction()
                                       throws OwExprTypeMissmatchException

Description copied from interface: OwExprPrimaryPrefix

Forces this primary prefix symbol to a function.

Specified by:

regressToFunction in interface OwExprPrimaryPrefix

Returns:

the function symbol of this expression

Throws:

OwExprTypeMissmatchException - if a type mismatch is detected during function symbol creation

regressToPorperty

public OwExprPropertySymbol regressToPorperty()
                                       throws OwExprTypeMissmatchException

Description copied from interface: OwExprPrimaryPrefix

Forces this primary prefix symbol to a property.

Specified by:

regressToPorperty in interface OwExprPrimaryPrefix

Returns:

the property symbol of this expression

Throws:

OwExprTypeMissmatchException - if a type mismatch is detected during property symbol creation

regressToScope

public OwExprSymbolScope regressToScope()
                                 throws OwExprTypeMissmatchException

Description copied from interface: OwExprPrimaryPrefix

Forces this primary prefix to a scope symbol.

Specified by:

regressToScope in interface OwExprPrimaryPrefix

Returns:

the scope symbol of this expression

Throws:

OwExprTypeMissmatchException - if a type mismatch is detected during scope symbol creation

toString

public String toString()

Overrides:

toString in class Object