copper-server-impl/src/main/java/com/pogeyan/cmis/impl/uri/expression/FilterParserImpl.java
/**
	 * Check if a token is a UnaryOperator ( e.g. "not" or "-" )
	 * 
	 * @param token
	 *            Token to be checked
	 * 
	 * @return
	 *         <li>An instance of {@link InfoUnaryOperator} containing
	 *         information about the specific unary operator</li>
	 *         <li><code>null</code> if the token is not an unary operator</li>
	 */
Check if a token is a UnaryOperator ( e.g.

@param token
Token to be checked

@return
An instance of  InfoUnaryOperator containing
information about the specific unary operator
null if the token is not an unary operator
Check if a token is a UnaryOperator ( e . g . @param token Token to be checked @return An instance of InfoUnaryOperator containing information about the specific unary operator null if the token is not an unary operator
protected InfoUnaryOperator isUnaryOperator(final Token token) {
		if ((token.getKind() == TokenKind.LITERAL) || (token.getKind() == TokenKind.SYMBOL)) {
			InfoUnaryOperator operator = availableUnaryOperators.get(token.getUriLiteral());
			return operator;
		}
		return null;
	}
protected InfoUnaryOperator isUnaryOperator ( final Token token ) { if ( ( token . getKind ( ) == TokenKind . LITERAL ) || ( token . getKind ( ) == TokenKind . SYMBOL ) ) { InfoUnaryOperator operator = availableUnaryOperators . get ( token . getUriLiteral ( ) ) ; return operator ; } return null ; }
Check if a token is a UnaryOperator ( e.g.
Check if a token is a UnaryOperator ( e . g .