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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* Copyright (C) 2004 Joe Walnes.
* Copyright (C) 2006, 2007, 2018 XStream Committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*
* Created on 29. May 2004 by Joe Walnes
*/
package com.feilong.lib.xstream.converters.extended;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.feilong.lib.xstream.converters.ConversionException;
import com.feilong.lib.xstream.converters.basic.AbstractSingleValueConverter;
import com.feilong.lib.xstream.core.JVM;
/**
* Converter for StackTraceElement (the lines of a stack trace) - JDK 1.4+ only.
*
* @author B. K. Oxley (binkley)
* @author Joe Walnes
*/
public class StackTraceElementConverter extends AbstractSingleValueConverter{
// Regular expression to parse a line of a stack trace. Returns 4 groups.
//
// Example: com.blah.MyClass.doStuff(MyClass.java:123)
// |-------1------| |--2--| |----3-----| |4|
// (Note group 4 is optional is optional and only present if a colon char exists.)
private static final Pattern PATTERN = Pattern.compile("^(.+)\\.([^\\(]+)\\(([^:]*)(:(\\d+))?\\)$");
private static final StackTraceElementFactory FACTORY;
static{
StackTraceElementFactory factory = null;
if (JVM.isVersion(5)){
Class factoryType = JVM.loadClassForName("com.feilong.lib.xstream.converters.extended.StackTraceElementFactory15", false);
try{
factory = (StackTraceElementFactory) factoryType.newInstance();
}catch (Exception e){
// N/A
}catch (LinkageError e){
// N/A
}
}
if (factory == null){
factory = new StackTraceElementFactory();
}
try{
factory.unknownSourceElement("a", "b");
}catch (Exception e){
factory = null;
}catch (NoClassDefFoundError e){ // GAE
factory = null;
}
FACTORY = factory;
}
@Override
public boolean canConvert(Class type){
return StackTraceElement.class.equals(type) && FACTORY != null;
}
@Override
public String toString(Object obj){
String s = super.toString(obj);
// JRockit adds ":???" for invalid line number
return s.replaceFirst(":\\?\\?\\?", "");
}
@Override
public Object fromString(String str){
Matcher matcher = PATTERN.matcher(str);
if (matcher.matches()){
String declaringClass = matcher.group(1);
String methodName = matcher.group(2);
String fileName = matcher.group(3);
if (fileName.equals("Unknown Source")){
return FACTORY.unknownSourceElement(declaringClass, methodName);
}else if (fileName.equals("Native Method")){
return FACTORY.nativeMethodElement(declaringClass, methodName);
}else{
if (matcher.group(4) != null){
int lineNumber = Integer.parseInt(matcher.group(5));
return FACTORY.element(declaringClass, methodName, fileName, lineNumber);
}else{
return FACTORY.element(declaringClass, methodName, fileName);
}
}
}else{
throw new ConversionException("Could not parse StackTraceElement : " + str);
}
}
}