/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* !#
*/
package net.ontopia.topicmaps.utils.ctm;
import net.ontopia.topicmaps.core.TopicIF;
public class NamedWildcardTopicGenerator extends AbstractTopicGenerator {
private ParseContextIF context;
private String name;
private TopicIF topic; // made only once
public NamedWildcardTopicGenerator(ParseContextIF context, String name) {
this.context = context;
this.name = name;
}
public TopicIF getTopic() {
if (topic == null)
topic = context.makeAnonymousTopic(name);
return topic;
}
public ValueGeneratorIF copy() {
return this; // no state, so...
}
/**
* Called when the parse context the named wildcard occurs in ends,
* so that next time this named wildcard is seen a new topic will
* need to be created.
*/
public void contextEnd() {
topic = null;
}
}