CODEWITHSUNDEEP
javaapache-commons
Booyaches
Booyaches

Reputation: 1719

How do I choose a proper component file from Apache Commons?

I don't understand how should I know which Apache Commons jar's to reference if I want to use some of its components. For example, if I want to use ObservableCollection, how do I know which jar's to reference to be able to use it.

I downloaded Collections (I added it to my build path) but this component has only "AbstractCollectionDecorator" class. In the documentation I can see that the actual class lies in the package:

org.apache.commons.events.observable.ObservableCollection

How should I figure out which package to reference?

Upvotes: 0

Views: 196

Answers (2)

Guido Simone
Guido Simone

Reputation: 7952

Note that the path to the javadoc to ObservableCollection starts with http://commons.apache.org/dormant. Hmmm... not a good sign.

How should I figure out which package to rererence?

From the main dormant page:

If you wish to use any of these components, you must build them yourselves. It is best to assume that these components will not be released in the near future.

Upvotes: 1

mhaller
mhaller

Reputation: 14222

From the package name, e.g. org.apache.commons.events remove the org.apache part.

The next part is org.apache.commons, that means it's the Apache Jakarta Commons project group, which is also an aggregator for multiple projects. So we need yet another fragment for the name to distinguish it:

So you got org.apache.commons.events now. The name suggest commons-events, because Apache Commons Collections would be org.apache.commons.collections

So all you have to do is remove org.apache, replace the dot with a slash and you've got the jar filename you need:

org.apache.commons.events      -> commons-events.jar
org.apache.commons.collections -> commons-collections.jar
org.apache.commons.io          -> commons-io.jar
org.apache.commons.lang        -> commons-lang.jar

etc

Upvotes: 0

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