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.internal.InternalConstants;
018    import org.apache.tapestry5.ioc.annotations.Inject;
019    import org.apache.tapestry5.ioc.annotations.Symbol;
020    import org.apache.tapestry5.services.StackTraceElementAnalyzer;
021    import org.apache.tapestry5.services.StackTraceElementClassConstants;
022    
023    /**
024     * Identifies frames for application classes.
025     *
026     * @since 5.1.0.0
027     */
028    public class ApplicationStackTraceElementAnalyzer implements StackTraceElementAnalyzer
029    {
030        private final String appPackage;
031    
032        public ApplicationStackTraceElementAnalyzer(
033                @Inject @Symbol(InternalConstants.TAPESTRY_APP_PACKAGE_PARAM)
034                String appPackage)
035        {
036            this.appPackage = appPackage;
037        }
038    
039        public String classForFrame(StackTraceElement frame)
040        {
041            return frame.getClassName().startsWith(appPackage) && frame.getLineNumber() > 0
042                   ? StackTraceElementClassConstants.USER_CODE
043                   : null;
044        }
045    }