001// Copyright 2010, 2012 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;
018import org.apache.tapestry5.services.StackTraceElementClassConstants;
019
020/**
021 * Encapsulates a number of tests for identifying stack frames that are a side-effect
022 * of various Tapestry Aspect Oriented Programming and other code generation behaviors.
023 *
024 * @since 5.2.0
025 */
026public class TapestryAOPStackFrameAnalyzer implements StackTraceElementAnalyzer
027{
028    private static final String[] SYNTHETIC_METHOD_PREFIXES = new String[]
029            {"conduit_get_", "conduit_set_", "reject_field_change_", "shim_set_", "shim_get_"};
030
031    public String classForFrame(StackTraceElement frame)
032    {
033        if (omit(frame))
034            return StackTraceElementClassConstants.OMITTED;
035
036        return null;
037    }
038
039    private boolean omit(StackTraceElement frame)
040    {
041        if (frame.getClassName().equals("org.apache.tapestry5.internal.plastic.MethodHandleImpl"))
042        {
043            return true;
044        }
045
046        if (frame.getMethodName().equals("invoke") && frame.getClassName().contains("$MethodAccess_"))
047        {
048            return true;
049        }
050
051        if (frame.getMethodName().equals("proceedToAdvisedMethod") && frame.getClassName().contains("$Invocation_"))
052        {
053            return true;
054        }
055
056        if (frame.getMethodName().equals("invoke") && frame.getClassName().contains("$Shim_"))
057        {
058            return true;
059        }
060
061        for (String prefix : SYNTHETIC_METHOD_PREFIXES)
062        {
063            if (frame.getMethodName().startsWith(prefix))
064                return true;
065        }
066
067        return false;
068    }
069
070}