1 // $Id: UnknownRelationException.java,v 1.2 2002-11-06 20:13:45 mike Exp $
3 package org.z3950.zing.cql;
7 * Exception indicating that a relation was not recognised.
8 * At compilation time, we accept any syntactically valid relation;
9 * but when rendering a tree out as PQF, we need to translate the
10 * relations into sets of Type-1 query attributes. If we can't do
11 * that, because the PQF configuration doesn't know about a relation,
12 * we throw one of these babies.
14 * @version $Id: UnknownRelationException.java,v 1.2 2002-11-06 20:13:45 mike Exp $
16 public class UnknownRelationException extends PQFTranslationException {
18 * Creates a new <TT>UnknownRelationException</TT>.
20 * The relation for which there was no PQF configuration.
22 public UnknownRelationException(String s) {