org.apache.activemq.console.filter.WildcardToMsgSelectorTransformFilter Maven / Gradle / Ivy
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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;
public class WildcardToMsgSelectorTransformFilter extends WildcardTransformFilter {
/**
* Creates a filter that is able to transform a wildcard query to a message
* selector format
*
* @param next - next query filter
*/
public WildcardToMsgSelectorTransformFilter(QueryFilter next) {
super(next);
}
/**
* Use to determine if a query string is a wildcard query. A query string is
* a wildcard query if it is a key-value pair with the format =
* and the value is enclosed in '' and contains '*' and '?'.
*
* @param query - query string
* @return true, if the query string is a wildcard query, false otherwise
*/
protected boolean isWildcardQuery(String query) {
// If the query is a key=value pair
String key = query;
String val = "";
int pos = key.indexOf("=");
if (pos >= 0) {
val = key.substring(pos + 1);
}
// If the value contains wildcards and is enclose by '
return val.startsWith("'") && val.endsWith("'") && ((val.indexOf("*") >= 0) || (val.indexOf("?") >= 0));
}
/**
* Transform a wildcard query to message selector format
*
* @param query - query string to transform
* @return message selector format string
*/
protected String transformWildcardQuery(String query) {
// If the query is a key=value pair
String key = query;
String val = "";
int pos = key.indexOf("=");
if (pos >= 0) {
val = key.substring(pos + 1);
key = key.substring(0, pos);
}
val = val.replaceAll("[?]", "_");
val = val.replaceAll("[*]", "%");
return key + " LIKE " + val;
}
}