jaitools.jiffle.parser
Class SymbolScope

java.lang.Object
  jaitools.jiffle.parser.SymbolScope

public class SymbolScope
extends Object

Stores symbols in a Jiffle script at a single scope level. Used during script compilation.

Since:

1.1

Version:

$Id: SymbolScope.java 1428 2011-02-18 06:43:31Z michael.bedward $

Author:

Michael Bedward

Constructor Summary

SymbolScope(String name)
Creates a new scope.

Method Summary

void	add(Symbol symbol) Adds a symbol to this scope.
Symbol	findSymbolNamed(String name) Gets the symbol with the given name if one exists.
String	getName() Gets the scope label.
List<Symbol>	getSymbols() Gets the list of symbols in this scope.
boolean	hasSymbolNamed(String name) Tests if this scope contains a symbol with the given name.
boolean	isEmpty() Tests if this scope is empty.
int	size() Gets the number of symbols in this scope.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SymbolScope

public SymbolScope(String name)

Creates a new scope.

Parameters:

name - a scope label

Method Detail

getName

public String getName()

Gets the scope label.

Returns:

scope label

getSymbols

public List<Symbol> getSymbols()

Gets the list of symbols in this scope. The list is returned as an unmodifiable view.

Returns:

list of symbols

isEmpty

public boolean isEmpty()

Tests if this scope is empty.

Returns:

true if there are no symbols; false otherwise

size

public int size()

Gets the number of symbols in this scope.

Returns:

number of symbols

add

public void add(Symbol symbol)

Adds a symbol to this scope.

Parameters:

symbol - the symbol

Throws:

IllegalArgumentException - if symbol is null

hasSymbolNamed

public boolean hasSymbolNamed(String name)

Tests if this scope contains a symbol with the given name.

Parameters:

name - symbol name

Returns:

true if a symbol with this name is found; false otherwise

findSymbolNamed

public Symbol findSymbolNamed(String name)

Gets the symbol with the given name if one exists.

Parameters:

name - symbol name

Returns:

the symbol or null if not match was found