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From: Aaron Rosenzweig <aaron@chatnbike.com>
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Date: Fri, 9 Dec 2022 12:05:11 -0500
Subject: How to get ERExtensions to compile in modern java?
Message-Id: <1C4467E4-A541-4F0B-8096-098A9C6422E8@chatnbike.com>
To: WebObjects & WOnder Development <webobjects-dev@wocommunity.org>

I=E2=80=99m struggling to get ERExtensions to compile in newer java. If =
we can figure this out, then it will help to get everything else to =
compile as well.=20

ERExtensions works when compiling in java 1.8 but after that, it =
probably doesn=E2=80=99t. I=E2=80=99m trying to do it with Java 17.=20

The immediate problem is with WOWebServicePatch.java in package =
com.webobjects.appserver._private in ERExtensions.

Reason:
The package org.w3c.dom is accessible from more than one module: =
<unnamed>,
java.xml

It=E2=80=99s trying to create an instance of =E2=80=9Corg.w3c.dom.Document=
=E2=80=9D but cannot because it=E2=80=99s defined in multiple places =
which fouls up Java Modules (JPMS Java Platform Module System).=20

In the past, having multiple jars that redefine an object was fine and =
the first one wins. Now it=E2=80=99s an error (after Java 1.8).=20

It looks like =E2=80=9Corg.w3c.dom.Document=E2=80=9D is defined both in =
JavaXML.framework (NeXT/Apple I believe) and also natively in Java 17.=20=


So I removed =E2=80=9CJavaXML=E2=80=9D from the classpath to see what =
would happen. It solved that problem but created more. It now doesn=E2=80=99=
t know about: org.apache.axis

I guess I could get axis.jar (1.4.1) but=E2=80=A6 wondering what is the =
best course of action here.

Any advice?

Thank you,
=E2=80=94 Aaron=