logger.debug("{}:{}", query, boost);
            }
            return convertPrefixQuery(context, prefixQuery, boost);
        }
        throw new InvalidQueryException(messages -> messages.addErrorsInvalidQueryUnknown(UserMessages.GLOBAL_PROPERTY_KEY),
                "Unknown q: " + query.getClass() + " => " + query);
    }

    /**
     * Converts a prefix query to a query builder.
     *

            if (queryCommand != null) {
                return queryCommand.execute(context, query, boost);
            }
            throw new InvalidQueryException(messages -> messages.addErrorsInvalidQueryUnknown(UserMessages.GLOBAL_PROPERTY_KEY),
                    "Unknown q: " + query.getClass() + " => " + query);
        };
    }

    /**
     * Interface for query processing filters.

            }
            throwValidationError(messages -> messages.addErrorsResultSizeExceeded(GLOBAL), this::asListHtml);
        }

        throwValidationError(messages -> messages.addErrorsInvalidQueryUnknown(GLOBAL), this::asListHtml);
        return null; // ignore
    }

    /**
     * Executes a search based on the provided search criteria.
     *

     * </pre>
     * @param property The property name for the message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsInvalidQueryUnknown(String property) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_invalid_query_unknown));
        return this;
    }

    /**