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
015package org.apache.tapestry5.internal.services;
016
017import 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 */
024public 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}