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SourceDir should be a standard class attribute

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Vlad Roubtsov

Posts: 20
Nickname: vladr
Registered: May, 2003

Vlad Roubtsov is a Java Q&A columnist for JavaWorld

SourceDir should be a standard class attribute

Posted: Jul 29, 2003 3:53 PM

This post originated from an RSS feed registered with Java Buzz by Vlad Roubtsov.
Original Post: SourceDir should be a standard class attribute Feed Title: Java Curiosity Shop Feed URL: http://www.blog-city.com/bc/ Feed Description: Java esoterics: things from "don't try this at home" category	Latest Java Buzz Posts Latest Java Buzz Posts by Vlad Roubtsov Latest Posts From Java Curiosity Shop

Another relatively useless bit of Java trivia: I chanced to run my javap-like tool on some really old Java code on my machine and discovered another undocumented .class attribute that MS jvc compiler used to emit: SourceDir [generic]: name @3, length = 8 Because every attribute has a standard 6 byte header it is pretty obvious that SourceDir contains a u2 pointer to a CONSTANT_Utf8 entry that is the directory containing the source file at the time it was compiled. Browsing through constant pool entries confirms this: [340] CONSTANT_Utf8: D:\code\Java\more dir segments\ Together with the [standard] SourceFile attribute this provides complete information on the source file location. Pretty useful for tools like debuggers and coverage analyzers, if you ask me. Suns compilers should emit the same attribute.

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