com.wewebu.expression.language
Class OwExprNullLiteral

java.lang.Object
  extended by com.wewebu.expression.language.OwExprExpression
      extended by com.wewebu.expression.language.OwExprLiteral
          extended by com.wewebu.expression.language.OwExprNullLiteral
All Implemented Interfaces:
OwExprPrimaryPrefix

public class OwExprNullLiteral
extends OwExprLiteral

A fixed reserved word null expression :
a!=null

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All rights reserved.

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Field Summary
 
Fields inherited from class com.wewebu.expression.language.OwExprLiteral
m_symbol
 
Fields inherited from class com.wewebu.expression.language.OwExprExpression
m_errorTable, m_symbolTable, m_typeError
 
Method Summary
static OwExprNullLiteral instance(OwExprSymbolTable symbolTable_p, OwExprErrorTable errorTable_p)
          Single symbol literal creator.
 
Methods inherited from class com.wewebu.expression.language.OwExprLiteral
evaluate, expression, getValue, regressToFunction, regressToPorperty, regressToScope, symbolInstance, toString, type
 
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
 

Method Detail

instance

public static final OwExprNullLiteral instance(OwExprSymbolTable symbolTable_p,
                                               OwExprErrorTable errorTable_p)
                                        throws ParseException
Single symbol literal creator. This method will return instances of OwExprNullLiteral based on the a single symbol instance associated with the null reserved word String image

Parameters:
symbolTable_p - global symbol table
errorTable_p - global error table
Returns:
a single symbol based literal instance creator.
Throws:
ParseException


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