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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.services.StackTraceElementAnalyzer;
018import org.apache.tapestry5.services.StackTraceElementClassConstants;
019
020/**
021 * Identifies frames for various proxy classes (class name starts with a '$' and there's no line number.  They are
022 * ommitted.
023 *
024 * @since 5.1.0.0
025 */
026public class ProxiesStackTraceElementAnalyzer implements StackTraceElementAnalyzer
027{
028    public String classForFrame(StackTraceElement frame)
029    {
030        return frame.getClassName().startsWith("$") && frame.getLineNumber() <= 0
031               ? StackTraceElementClassConstants.OMITTED
032               : null;
033    }
034}