/* | |
* 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; | |
} | |
} |