public static ExpressionEvaluator getInstance(String name) {
        assert DEFAULT_FACTORY != null;
        assert FACTORY_MAP != null;

        if(name == null)
            return DEFAULT_FACTORY.getInstance();
        else if(FACTORY_MAP.containsKey(name))
            return ((ExpressionEngineFactory)FACTORY_MAP.get(name)).getInstance();

        String msg = "An ExpressionEvaluator named \"" + name + "\" is not available.";
        LOGGER.error(msg);
        throw new IllegalArgumentException(msg);
    }
public static ExpressionEvaluator getInstance ( String name ) { assert DEFAULT_FACTORY != null ; assert FACTORY_MAP != null ; if ( name == null ) return DEFAULT_FACTORY . getInstance ( ) ; else if ( FACTORY_MAP . containsKey ( name ) ) return ( ( ExpressionEngineFactory ) FACTORY_MAP . get ( name ) ) . getInstance ( ) ; String msg = "An ExpressionEvaluator named \"" + name + "\" is not available." ; LOGGER . error ( msg ) ; throw new IllegalArgumentException ( msg ) ; }
Get an {@link ExpressionEvaluator} named <code>name</code>.

@param name the name of the {@link ExpressionEvaluator} to obtain.
@return an {@link ExpressionEvaluator} matching the given name.
@throws IllegalArgumentException if an {@link ExpressionEvaluator} matching the name is not found