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replace JarURLConnection.getJarFileURL() by .getURL() #1259

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merged 1 commit into from
Mar 6, 2024

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For typical plain JAR URLs this doesn't make a real difference, but for special JAR URLs, like Spring Boot uses, it does. The problem showed with nested JAR URLs of Spring Boot. Those have a format like

jar:nested:/some/file.jar/!BOOT-INF/lib/nested.jar!/

Here the connection.getJarFileURL() is

nested:/some/file.jar/!BOOT-INF/lib/nested.jar

but the connection.getURL() is

jar:nested:/some/file.jar/!BOOT-INF/lib/nested.jar!/

Using the latter yields the correct result and allows the custom JAR URL handler to kick in. Using the former will yield an exception that ArchUnit doesn't understand the scheme nested.

Resolves: #1224

For typical plain JAR URLs this doesn't make a real difference,
but for special JAR URLs, like Spring Boot uses, it does.
The problem showed with nested JAR URLs of Spring Boot.
Those have a format like
```
jar:nested:/some/file.jar/!BOOT-INF/lib/nested.jar!/com/example/MyClass.class
```
Here the `connection.getJarFileURL()` is
```
nested:/some/file.jar/!BOOT-INF/lib/nested.jar
```
but the `connection.getURL()` is
```
jar:nested:/some/file.jar/!BOOT-INF/lib/nested.jar!/
```
Using the latter yields the correct result and allows the custom JAR URL handler to kick in.
Using the former will yield an exception that ArchUnit doesn't understand the scheme `nested`.

Signed-off-by: Peter Gafert <peter.gafert@archunit.org>
@codecholeric codecholeric merged commit 05de8e0 into main Mar 6, 2024
21 checks passed
@codecholeric codecholeric deleted the fix-importing-nested-Spring-jars branch March 6, 2024 23:57
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fails with Spring Boot Nested Jars
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