«

Hi,

I'm using Mac OS X (bash shell) with Java 1.5. I have an enum class
and I think an old version is drifting around in a JAR file somewhere
that contains a field, "MATCH_999". Does anyone know how to search
through the JAR files to find the JAR(s) that may contain this? I
would prefer not to unzip each one.

Thanks for any advice, - Dave

laredotornado <> wrote:
> I'm using Mac OS X (bash shell) with Java 1.5. I have an enum class
> and I think an old version is drifting around in a JAR file somewhere
> that contains a field, "MATCH_999". Does anyone know how to search
> through the JAR files to find the JAR(s) that may contain this? I
> would prefer not to unzip each one.

Giving your compiler the -verbose option will make it write for each
class used, where it found it. Perhaps that way you find it.

It did help me recently in a similar situation.

On Oct 8, 8:41*am, Andreas Leitgeb <a...@gamma.logic.tuwien.ac.at>
wrote:
> laredotornado<laredotorn...@zipmail.com> wrote:
> > I'm using Mac OS X (bash shell) with Java 1.5. *I have an enum class
> > and I think an old version is drifting around in a JAR file somewhere
> > that contains a field, "MATCH_999". *Does anyone know how to search
> > through the JAR files to find the JAR(s) that may contain this? *I
> > would prefer not to unzip each one.
>
> Giving your compiler the -verbose option will make it write for each
> class used, where it found it. Perhaps that way you find it.
>
> It did help me recently in a similar situation.

The problems I'm running into are occurring during run time -- the
wrong version of a class is getting loaded. Thus I want to see if
that class (and specifically I know what I'm looking for in that
class) exists in different JARs.

I can recompile my project, but the bad JAR file is still going to be
somewhere in the classpath.

Any advice on finding which JAR contains the offending class file is
appreciated. Thanks, - Dave

On Oct 8, 10:12*am, laredotornado <laredotorn...@zipmail.com> wrote:
> Hi,
>
> I'm using Mac OS X (bash shell) with Java 1.5. *I have an enum class
> and I think an old version is drifting around in a JAR file somewhere
> that contains a field, "MATCH_999". *Does anyone know how to search
> through the JAR files to find the JAR(s) that may contain this? *I
> would prefer not to unzip each one.
>
> Thanks for any advice, - Dave

If you're comfortable with a little shell scripting you can do
something like the following (example looks for which class
getAsciiStream is found in):

prompt$ for f in mysql-connector-java.jar; do
> echo "$f"
> jar tf "$f" \
> | egrep '\.class$' \
> | tr '/' '.' \
> | while read classname; do
> echo " $classname"
> javap -classpath "$f" ${classname%.class} \
> | egrep getAsciiStream
> done
> done
mysql-connector-java.jar
com.mysql.jdbc.AssertionFailedException.class
com.mysql.jdbc.Blob.class
com.mysql.jdbc.Buffer.class
com.mysql.jdbc.CharsetMapping.class
com.mysql.jdbc.Clob.class
public java.io.InputStream getAsciiStream();
com.mysql.jdbc.Connection$UltraDevWorkAround.class
com.mysql.jdbc.Connection.class
com.mysql.jdbc.DatabaseMetaData.class
[...etc...]

In article
<84e97aef-c909-4016-870b->,
laredotornado <> wrote:

> I'm using Mac OS X (bash shell) with Java 1.5. I have an enum class
> and I think an old version is drifting around in a JAR file somewhere
> that contains a field, "MATCH_999". Does anyone know how to search
> through the JAR files to find the JAR(s) that may contain this? I
> would prefer not to unzip each one.

Using the -verbose option of the `java` command may shed light.
Alternatively, the example below may be modified to search particular
paths. As written, it examines the java.class.path property, but an
errant $CLASSPATH environment variable is another suspect. Searching the
individual JarEntry's InputStream should be a straightforward extension.

<code>
package cli;

import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

/** @author Ram, Matthews */
public class ShowClassPath {

public static void main(final String[] args) throws Throwable {
final String pathSep = File.pathSeparator;
final String list = System.getProperty("java.class.path");
for (final String path : list.split(pathSep)) {
final File f = new java.io.File(path);
if (f.isDirectory()) {
ls(f);
} else if (f.toString().endsWith("jar")) {
lsJar(f);
} else {
System.out.println(f);
}
}
}

private static void ls(File f) {
File[] list = f.listFiles();
for (File file : list) {
if (file.isDirectory()) {
ls(file);
} else {
System.out.println(file);
}
}
}

private static void lsJar(File f) {
try {
JarFile jar = new JarFile(f);
Enumeration e = jar.entries();
while (e.hasMoreElements()) {
JarEntry je = (JarEntry) e.nextElement();
System.out.println(je.getName());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
</code>



--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

On Oct 8, 4:12*pm, laredotornado <laredotorn...@zipmail.com> wrote:
> Hi,
>
> I'm using Mac OS X (bash shell) with Java 1.5. *I have an enum class
> and I think an old version is drifting around in a JAR file somewhere
> that contains a field, "MATCH_999". *Does anyone know how to search
> through the JAR files to find the JAR(s) that may contain this? *I
> would prefer not to unzip each one.
>
> Thanks for any advice, - Dave

If you know that the field is called MATCH_999, it means you have a
reference to the enum. So you can print the result of:

YourEnum.class.getResource("YourEnum.class")

it should be a URL containing the full path of the Jar file containing
the enum.

hth,
Alessio Stalla

In article
<2b118552-057c-44a7-80a4->,
laredotornado <> wrote:

> On Oct 8, 8:41Â*am, Andreas Leitgeb <a...@gamma.logic.tuwien.ac.at>
> wrote:
> > laredotornado<laredotorn...@zipmail.com> wrote:
> > > I'm using Mac OS X (bash shell) with Java 1.5. Â*I have an enum class
> > > and I think an old version is drifting around in a JAR file somewhere
> > > that contains a field, "MATCH_999". Â*Does anyone know how to search
> > > through the JAR files to find the JAR(s) that may contain this? Â*I
> > > would prefer not to unzip each one.
> >
> > Giving your compiler the -verbose option will make it write for each
> > class used, where it found it. Perhaps that way you find it.
> >
> > It did help me recently in a similar situation.
>
> The problems I'm running into are occurring during run time -- the
> wrong version of a class is getting loaded. Thus I want to see if
> that class (and specifically I know what I'm looking for in that
> class) exists in different JARs.
>
> I can recompile my project, but the bad JAR file is still going to be
> somewhere in the classpath.
>
> Any advice on finding which JAR contains the offending class file is
> appreciated. Thanks, - Dave

Both `javac` and `java` have -verbose options. Depending on the problem,
one, the other, or a comparison of the two may be helpful.

Check that you have not incorrectly set the environment variable,
CLASSPATH. By fits and starts, I have come to believe that it's best not
to set it at all, relying instead on the corresponding compiler and
runtime options.

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

On Thu, 08 Oct 2009 07:12:09 -0700, laredotornado wrote:

> Hi,
>
> I'm using Mac OS X (bash shell) with Java 1.5. I have an enum class and
> I think an old version is drifting around in a JAR file somewhere that
> contains a field, "MATCH_999". Does anyone know how to search through
> the JAR files to find the JAR(s) that may contain this? I would prefer
> not to unzip each one.
>
> Thanks for any advice, - Dave

You could always try grep.

If you know the class name then just list the contents of the jars (jar
tf file.jar) and grep for the class name.

e.g.
find some_dir -name \*.jar | while read file; do
echo $file
jar tf $file| grep classname
done

should tell you every jar file which contain the class. This should
narrow the search.

Then try grep on the jar file itself, searching for the field. Whether
the field's actual name exists in the jar may depend on what debugging
information is included in the class files. I have only performed one
rudimentary test with grep, and searched for a static String identifier,
which did work.

--
Nigel Wade

On Thu, 8 Oct 2009 07:12:09 -0700 (PDT), laredotornado
<> wrote, quoted or indirectly quoted someone
who said :

>
>I'm using Mac OS X (bash shell) with Java 1.5. I have an enum class
>and I think an old version is drifting around in a JAR file somewhere
>that contains a field, "MATCH_999". Does anyone know how to search
>through the JAR files to find the JAR(s) that may contain this? I
>would prefer not to unzip each one.

I would do it on Windows by Winzip unpack then scan with Funduc
Search/Replace.

To do it with code you could use the Zip class to scan the jar, and
just read each class file as a string of bytes, then look for that
byte string (utf-8 encoding).

For a more general solution, you could decode the class file.
See http://mindprod.com/jgloss/javaclassformat.html
and follow the links for tools.
--
Roedy Green Canadian Mind Products
http://mindprod.com

I advocate that super programmers who can juggle vastly more complex balls than average guys can, should be banned, by management, from dragging the average crowd into system complexity zones where the whole team will start to drown.
~ Jan V.