com.elegantj.data.parser
Class SymbolTable

java.lang.Object
  java.util.Dictionary
      java.util.Hashtable
          com.elegantj.data.parser.SymbolTable

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map, java.io.Serializable

public class SymbolTable

extends java.util.Hashtable

A SymbolTable class represents the set of symbol's definations.

See Also:

Serialized Form

Nested Class Summary

class	SymbolTable.ColumnSymbol ColumnSymbol class represents the Column's value
class	SymbolTable.NullSymbol NullSymbol class represents the NULL value

Constructor Summary

SymbolTable()
Creates a SymbolTable with empty set of symbol's definations.

Method Summary

java.lang.Object	addSymbol(java.lang.String symIdent_in, java.lang.Object symValue_in) Adds the symbol defination
boolean	containsSymbol(java.lang.Object symValue_in) Returns true if this symbol table maps one or more identifiers to this symbol value.
boolean	containsSymIdent(java.lang.String symIdent_in) Tests if the specified string is an identifier in this symbol table.
java.lang.Object	get(java.lang.Object key) Returns the value to which the specified key is mapped in this hashtable
java.lang.Object	removeSymbol(java.lang.String symIdent_in) Removes the symbol defination
void	setColumnSymbols(java.util.Vector columns, java.util.Vector values)
java.util.Enumeration	symbols() Returns an enumeration of the symbol definations in the symbol table

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, hashCode, isEmpty, keys, keySet, put, putAll, rehash, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SymbolTable

public SymbolTable()

Creates a SymbolTable with empty set of symbol's definations.

Method Detail

setColumnSymbols

public void setColumnSymbols(java.util.Vector columns,
                             java.util.Vector values)

addSymbol

public java.lang.Object addSymbol(java.lang.String symIdent_in,
                                  java.lang.Object symValue_in)

Adds the symbol defination

Parameters:

symIdent_in - identifier of the symbol

symValue_in - the value of the symbol

removeSymbol

public java.lang.Object removeSymbol(java.lang.String symIdent_in)

Removes the symbol defination

Parameters:

symIdent_in - identifier of the symbol

symbols

public java.util.Enumeration symbols()

Returns an enumeration of the symbol definations in the symbol table

containsSymIdent

public boolean containsSymIdent(java.lang.String symIdent_in)

Tests if the specified string is an identifier in this symbol table.

Parameters:

symIdent_in - the symbol identifier

Returns:

true if and only if the specified string is an identifier in this symbol table, as determined by the equals method; false otherwise

containsSymbol

public boolean containsSymbol(java.lang.Object symValue_in)

Returns true if this symbol table maps one or more identifiers to this symbol value.

Parameters:

symValue_in - the symbol value whose presence in this symbol table is to be tested

Returns:

true if this map maps one or more identifiers to the specified symbol value

get

public java.lang.Object get(java.lang.Object key)

Returns the value to which the specified key is mapped in this hashtable

Parameters:

key - a key in the hashtable.

Returns:

the value to which the key is mapped in this hashtable; null if the key is not mapped to any value in this hashtable.