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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.activemq.console.filter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public abstract class WildcardTransformFilter extends AbstractQueryFilter {
/**
* Creates a wildcard transform filter that is able to convert a wildcard
* expression (determined by isWildcardQuery) to a another query type (use
* transformWildcardQuery).
*
* @param next - the next query filter
*/
protected WildcardTransformFilter(QueryFilter next) {
super(next);
}
/**
* Converts the query list to set of different queries
*
* @param queries - query list to transform
* @return - result of the query
* @throws Exception
*/
public List query(List queries) throws Exception {
List newQueries = new ArrayList();
for (Iterator i = queries.iterator(); i.hasNext();) {
String queryToken = (String)i.next();
// Transform the wildcard query
if (isWildcardQuery(queryToken)) {
// Transform the value part only
newQueries.add(transformWildcardQuery(queryToken));
// Maintain the query as is
} else {
newQueries.add(queryToken);
}
}
return next.query(newQueries);
}
/**
* Use to determine is a query string is a wildcard query
*
* @param query - query string
* @return true, if the query string is a wildcard query, false otherwise
*/
protected abstract boolean isWildcardQuery(String query);
/**
* Use to transform a wildcard query string to another query format
*
* @param query - query string to transform
* @return transformed query
*/
protected abstract String transformWildcardQuery(String query);
}