/*
* 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.openjpa.persistence.jdbc;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.regexp.RE;
/**
* Utility class to verify whether a set of fragments appear in a list of
* possible SQL statement.
*
* @author Pinaki Poddar
*
*/
public class SQLSniffer {
private static Map<String, RE> cache = new HashMap<String, RE>();
/**
* Checks that the given set of regular expressions occur in at least one of
* the given input SQL.
*/
public static boolean matches(List<String> SQLs, String...regexes) {
if (SQLs == null || regexes == null)
return false;
for (String sql : SQLs) {
boolean matched = true;
for (String key : regexes) {
RE regex = getRegularExpression(key);
if (!regex.match(sql)) {
matched = false;
break;
}
}
if (matched)
return true;
}
return false;
}
private static RE getRegularExpression(String regex) {
if (cache.containsKey(regex))
return cache.get(regex);
RE re = new RE(regex);
cache.put(regex, re);
return re;
}
}