File	Doc	Category	Size	Date	Package
SymbolTable.java	API Doc	Glassfish v2 API	3950	Fri May 04 22:34:50 BST 2007	com.sun.jdo.spi.persistence.support.ejb.ejbqlc

SymbolTable

• java.lang.Object

Fields Summary
protected Map	symbols The table of declared identifier (symbols).

Constructors Summary

Methods Summary
public java.lang.Object	declare(java.lang.String ident, java.lang.Object decl) This method adds the specified identifier to this SymbolTable. The specified decl object provides details anbout the declaration. If this SymbolTable already defines an identifier with the same name, the SymbolTable is not changed and the existing declaration is returned. Otherwise null is returned. param ident identifier to be declared param definition new definition of identifier return the old definition if the identifier was already declared; null otherwise Object old = symbols.get(ident); if (old == null) { symbols.put(ident.toUpperCase(), decl); } return old;
public java.lang.Object	getDeclaration(java.lang.String ident) Checks the symbol table for the actual declaration of the specified identifier. The method returns the declaration object if available or null for an undeclared identifier. param ident the name of identifier return the declaration object if ident is declared; null otherise. return symbols.get(ident.toUpperCase());
public boolean	isDeclared(java.lang.String ident) Checks whether the specified identifier is declared. param ident the name of identifier to be tested return true if the identifier is declared; false otherwise. return (getDeclaration(ident) != null);