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Java Forum / First Aid / January 2007searching jars for a class..
hi, if you have a bunch of jars in a directory, is it possible to search for a class? I mean if you don't know in what jar the class is.. thank you.. ... > if you have a bunch of jars in a directory, is it possible to search for > a class? .. Sure, but it will almost certainly not sort 'the problem'. >... I mean if you don't know in what jar the class is.. Why not? Were these Jar's supplied without documentation? Did you make them? Andrew T. > ... >> if you have a bunch of jars in a directory, is it possible to search for [quoted text clipped - 8 lines] > > Andrew T. this is at work, trying to implement search functionality for a website I'm building, and getting error that am missing a certain bean.. wanted to search for it (no, documentation is not very good..) I need to talk to the back-end guys, but first wanted to search for bean myself.. (and there are SO MANY jars with "search" name in them..) thank you.. >> ... >>> if you have a bunch of jars in a directory, is it possible to search for >>> a class? .. >>> ... I mean if you don't know in what jar the class is.. Andrew Thompson wrote: >> Why not? Were these Jar's supplied without >> documentation? Did you make them? On a UNIX shell, or Windows/cygwin, you can use find $dir -name \*.jar -exec grep -e $ClassName '{}' \; from the shell prompt, where $dir is a directory (or a set of directories) somewhere above the JARs and $ClassName is the name of the class of interest. - Lew > hi, > > if you have a bunch of jars in a directory, is it possible to search for > a class? I mean if you don't know in what jar the class is.. > > thank you.. This is what I use (you'll need an appropriate shell - i.e. not the Windows default shell): find . -name *.jar -exec sh -c 'jar -tf {}|grep -H --label {} <pattern>' \; This searches recursively in the current directory. <pattern> is classname, partial classname or regular expression. For convenience, this can be turned into a shell script that takes the pattern as a parameter. Dan.  SignatureDaniel Dyer http://www.uncommons.org > find . -name *.jar -exec sh -c 'jar -tf {}|grep -H --label {} > <pattern>' \; With more than one jar, you will need to double quote the name: find . -name "*.jar" -exec ... Tom Hawtin >> find . -name *.jar -exec sh -c 'jar -tf {}|grep -H --label {} >> <pattern>' \; > > With more than one jar, you will need to double quote the name: > > find . -name "*.jar" -exec ... I use bash and it's not a problem. I just tried some of the other shells on my machine - sh and ksh didn't need the quotes, only csh did. Dan. SignatureDaniel Dyer https://watchmaker.dev.java.net - Evolutionary Algorithm Framework for Java >> With more than one jar, you will need to double quote the name: >> >> find . -name "*.jar" -exec ... > > I use bash and it's not a problem. I just tried some of the other > shells on my machine - sh and ksh didn't need the quotes, only csh did. I use bash also. All of them should expand filename globs. Presumably you have a version of find which unusually accepts multiple arguments to -name. Tom Hawtin >>> With more than one jar, you will need to double quote the name: >>> >>> find . -name "*.jar" -exec ... Daniel Dyer wrote: >> I use bash and it's not a problem. I just tried some of the other >> shells on my machine - sh and ksh didn't need the quotes, only csh did. > I use bash also. All of them should expand filename globs. Presumably > you have a version of find which unusually accepts multiple arguments to > -name. More likely, Daniel invoked the command from a cwd without any JAR files in it. Absent any valid expansion of the wildcard, bash leaves it intact. - Lew >> I use bash also. All of them should expand filename globs. Presumably >> you have a version of find which unusually accepts multiple arguments [quoted text clipped - 4 lines] > > - Lew Yes, that's exactly what I did. Thanks for clearing up the discrepancy. Dan. SignatureDaniel Dyer https://watchmaker.dev.java.net - Evolutionary Algorithm Framework for Java Daniel Dyer wrote: >> find . -name *.jar -exec sh -c 'jar -tf {}|grep -H --label {} <pattern>' \; This is superior to the "find" that I posted. Mine depended on the fact that the file name is searchable in the binary JAR file, this one actually searches the table of contents. > With more than one jar, you will need to double quote the name: > > find . -name "*.jar" -exec ... or single-quote the filename pattern. -Lew "picky, picky, picky" Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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