Class ShadowedSymbolTable


  • public final class ShadowedSymbolTable
    extends SymbolTable
    Shadowed symbol table. The table has a reference to the main symbol table and is not allowed to add new symbols to the main symbol table. New symbols are added to the shadow symbol table and are local to the component using this table.
    Version:
    $Id$
    Author:
    Andy Clark IBM
    • Field Detail

      • fSymbolTable

        protected SymbolTable fSymbolTable
        Main symbol table.
    • Constructor Detail

      • ShadowedSymbolTable

        public ShadowedSymbolTable​(SymbolTable symbolTable)
        Constructs a shadow of the specified symbol table.
    • Method Detail

      • addSymbol

        public String addSymbol​(String symbol)
        Adds the specified symbol to the symbol table and returns a reference to the unique symbol. If the symbol already exists, the previous symbol reference is returned instead, in order guarantee that symbol references remain unique.
        Overrides:
        addSymbol in class SymbolTable
        Parameters:
        symbol - The new symbol.
      • addSymbol

        public String addSymbol​(char[] buffer,
                                int offset,
                                int length)
        Adds the specified symbol to the symbol table and returns a reference to the unique symbol. If the symbol already exists, the previous symbol reference is returned instead, in order guarantee that symbol references remain unique.
        Overrides:
        addSymbol in class SymbolTable
        Parameters:
        buffer - The buffer containing the new symbol.
        offset - The offset into the buffer of the new symbol.
        length - The length of the new symbol in the buffer.
      • hash

        public int hash​(String symbol)
        Returns a hashcode value for the specified symbol. The value returned by this method must be identical to the value returned by the hash(char[],int,int) method when called with the character array that comprises the symbol string.
        Overrides:
        hash in class SymbolTable
        Parameters:
        symbol - The symbol to hash.
      • hash

        public int hash​(char[] buffer,
                        int offset,
                        int length)
        Returns a hashcode value for the specified symbol information. The value returned by this method must be identical to the value returned by the hash(String) method when called with the string object created from the symbol information.
        Overrides:
        hash in class SymbolTable
        Parameters:
        buffer - The character buffer containing the symbol.
        offset - The offset into the character buffer of the start of the symbol.
        length - The length of the symbol.