001// *************************************************************************************************************************** 002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * 003// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * 004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance * 005// * with the License. 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 distributed under the License is distributed on an * 010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * 011// * specific language governing permissions and limitations under the License. * 012// *************************************************************************************************************************** 013package org.apache.juneau.transforms; 014 015import java.util.*; 016 017import org.apache.juneau.*; 018import org.apache.juneau.transform.*; 019 020/** 021 * Transforms {@link StackTraceElement StackTraceElements} to {@code String} objects. 022 * 023 * <p> 024 * The swap is identical to just calling {@link StackTraceElement#toString()}, but provides the ability to 025 * parse the resulting string back into a bean. 026 */ 027public class StackTraceElementSwap extends PojoSwap<StackTraceElement,String> { 028 029 /** 030 * Converts the specified {@link Enumeration} to a {@link List}. 031 */ 032 @Override /* PojoSwap */ 033 public String swap(BeanSession session, StackTraceElement o) { 034 return o.toString(); 035 } 036 037 @Override /* PojoSwap */ 038 public StackTraceElement unswap(BeanSession session, String in, ClassMeta<?> hint) { 039 String methodName = "", fileName = null; 040 int lineNumber = -1; 041 042 if (in == null) 043 return null; 044 045 int i = in.indexOf('('); 046 if (i != -1) { 047 String s = in.substring(i+1, in.lastIndexOf(')')); 048 in = in.substring(0, i); 049 i = s.indexOf(':'); 050 if (i != -1) { 051 fileName = s.substring(0, i); 052 lineNumber = Integer.parseInt(s.substring(i+1)); 053 } else if ("Native Method".equals(s)) { 054 lineNumber = -2; 055 } else if (! "Unknown Source".equals(s)) { 056 fileName = s; 057 } 058 } 059 060 i = in.lastIndexOf('.'); 061 if (i != -1) { 062 methodName = in.substring(i+1); 063 in = in.substring(0, i); 064 } 065 066 return new StackTraceElement(in, methodName, fileName, lineNumber); 067 } 068}