org.apache.camel.support.PatternHelper 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.camel.support;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
public final class PatternHelper {
private PatternHelper() {
//Utility Class
}
/**
* Matches the name with the given pattern (case insensitive).
*
* The match rules are applied in this order:
*
* - exact match, returns true
* - wildcard match (pattern ends with a * and the name starts with the pattern), returns true
* - regular expression match, returns true
* - otherwise returns false
*
*
* @param name the name
* @param pattern a pattern to match
* @return true if match, false otherwise.
*/
public static boolean matchPattern(String name, String pattern) {
if (name == null || pattern == null) {
return false;
}
if (name.equalsIgnoreCase(pattern)) {
// exact match
return true;
}
if (matchWildcard(name, pattern)) {
return true;
}
if (matchRegex(name, pattern)) {
return true;
}
// no match
return false;
}
/**
* Matches the name with the given pattern (case insensitive).
*
* The match rules are applied in this order:
*
* - wildcard match (pattern ends with a * and the name starts with the pattern), returns true
* - otherwise returns false
*
*
* @param name the name
* @param pattern a pattern to match
* @return true if match, false otherwise.
*/
private static boolean matchWildcard(String name, String pattern) {
// we have wildcard support in that hence you can match with: file* to match any file endpoints
if (pattern.endsWith("*")) {
String text = pattern.substring(0, pattern.length() - 1);
return name.toLowerCase(Locale.ENGLISH).startsWith(text.toLowerCase(Locale.ENGLISH));
}
return false;
}
/**
* Matches the name with the given pattern (case insensitive).
*
* The match rules are applied in this order:
*
* - regular expression match, returns true
* - otherwise returns false
*
*
* @param name the name
* @param pattern a pattern to match
* @return true if match, false otherwise.
*/
private static boolean matchRegex(String name, String pattern) {
// match by regular expression
try {
Pattern compiled = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE);
Matcher matcher = compiled.matcher(name);
return matcher.matches();
} catch (PatternSyntaxException e) {
// ignore
}
return false;
}
public static boolean isExcludePatternMatch(String key, String... excludePatterns) {
for (String pattern : excludePatterns) {
if (matchPattern(key, pattern)) {
return true;
}
}
return false;
}
}