The map of named Command s, keyed by name. 

 public CatalogBase() 
{
    // --------------------------------------------------------- Constructors
}

Create an empty catalog.

 public CatalogBase(Map commands) 
{
        this.commands = Collections.synchronizedMap(commands);
}

Create a catalog whose commands are those specified in the given Map. All Map keys should be String and all values should be Command.

Parameters:

commands - Map of Commands.

since: Chain - 1.1

 public  void addCommand(String name,
    Command command) 
{
        commands.put(name, command);
}

Add a new name and associated Command to the set of named commands known to this Catalog , replacing any previous command for that name.

 public Command getCommand(String name) 
{
        return ((Command) commands.get(name));
}

Return the Command associated with the specified name, if any; otherwise, return null.

 public Iterator getNames() 
{
        return (commands.keySet().iterator());
}

Return an Iterator over the set of named commands known to this Catalog . If there are no known commands, an empty Iterator is returned.

 public String toString() 
{
        Iterator names = getNames();
        StringBuffer str =
            new StringBuffer("[" + this.getClass().getName() + ": ");
        while (names.hasNext()) {
            str.append(names.next());
            if (names.hasNext()) {
            str.append(", ");
            }
        }
        str.append("]");
        return str.toString();
}

Converts this Catalog to a String. Useful for debugging purposes.