    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}