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    import org.apache.tapestry5.services.StackTraceElementClassConstants;
019    
020    /**
021     * Identifies frames for various proxy classes (class name starts with a '$' and there's no line number.  They are
022     * ommitted.
023     *
024     * @since 5.1.0.0
025     */
026    public class ProxiesStackTraceElementAnalyzer implements StackTraceElementAnalyzer
027    {
028        public String classForFrame(StackTraceElement frame)
029        {
030            return frame.getClassName().startsWith("$") && frame.getLineNumber() <= 0
031                   ? StackTraceElementClassConstants.OMITTED
032                   : null;
033        }
034    }