001    // Copyright 2009, 2010 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.internal.InternalConstants;
018    import org.apache.tapestry5.ioc.annotations.Symbol;
019    import org.apache.tapestry5.services.StackTraceElementAnalyzer;
020    import org.apache.tapestry5.services.StackTraceElementClassConstants;
021    
022    /**
023     * Identifies frames for application classes.
024     * 
025     * @since 5.1.0.0
026     */
027    public class ApplicationStackTraceElementAnalyzer implements StackTraceElementAnalyzer
028    {
029        private final String appPackage;
030    
031        public ApplicationStackTraceElementAnalyzer(@Symbol(InternalConstants.TAPESTRY_APP_PACKAGE_PARAM)
032        String appPackage)
033        {
034            this.appPackage = appPackage;
035        }
036    
037        public String classForFrame(StackTraceElement frame)
038        {
039            return frame.getClassName().startsWith(appPackage) && frame.getLineNumber() > 0 ? StackTraceElementClassConstants.USER_CODE
040                    : null;
041        }
042    }