001    // Copyright 2009 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.services;
016    
017    import org.apache.tapestry5.services.StackTraceElementAnalyzer;
018    
019    /**
020     * Checks to see if a class has a given prefix to its class name.
021     *
022     * @since 5.1.0.0
023     */
024    public class PrefixCheckStackTraceElementAnalyzer implements StackTraceElementAnalyzer
025    {
026        private final String cssClass;
027        private final String prefix;
028    
029        public PrefixCheckStackTraceElementAnalyzer(String cssClass, String prefix)
030        {
031            this.prefix = prefix;
032            this.cssClass = cssClass;
033        }
034    
035        public String classForFrame(StackTraceElement frame)
036        {
037            return frame.getClassName().startsWith(prefix)
038                   ? cssClass
039                   : null;
040        }
041    }