/*

  * 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.shiro.util;

 import java.util.regex.Pattern;

 import java.util.regex.Matcher;

 /**

  * {@code PatternMatcher} implementation that uses standard {@link java.util.regex} objects.

  *

  * @see Pattern

  * @since 1.0

  */

 public class RegExPatternMatcher implements PatternMatcher {

     /**

      * Simple implementation that merely uses the default pattern comparison logic provided by the

      * JDK.

      * <p/>This implementation essentially executes the following:

      * <pre>

      * Pattern p = Pattern.compile(pattern);

      * Matcher m = p.matcher(source);

      * return m.matches();</pre>

      * @param pattern the pattern to match against

      * @param source  the source to match

      * @return {@code true} if the source matches the required pattern, {@code false} otherwise.

      */

     public boolean matches(String pattern, String source) {

         if (pattern == null) {

             throw new IllegalArgumentException("pattern argument cannot be null.");

         }

         Pattern p = Pattern.compile(pattern);

         Matcher m = p.matcher(source);

         return m.matches();

     }

 }