Fix #1087 - Paths file when generating Java files on Windows

[jcjveraa]

Fix #1047

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This fixes issues with generating openapi spec 3.1.0 versions on Windows, e.g. #1047

Please backport this to the main LTS release as well - I don't seem to be able to set a label?
I've tested this on my own simple project.

https://github.com/jcjveraa/quarkus-openapi-generator-demoapp

Without this fix (on windows on version 2.10.0-lts): java.net.URISyntaxException: Illegal character in opaque part at index 2: C:(...)
With (on local build of 3.0.0-SNAPSHOT): it works fine.

No tests added

[jcjveraa]

ref https://github.com/jcjveraa/quarkus-openapi-generator-demoapp
On version 2.10.0-lts on windows 11:

C:\Users\veraj00\.jdks\temurin-17.0.15\bin\java.exe -Dmaven.multiModuleProjectDirectory=C:\ws\git\demo -Djansi.passthrough=true -Dmaven.home=C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9 -Dclassworlds.conf=C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\bin\m2.conf "-Dmaven.ext.class.path=C:\Users\veraj00\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven-event-listener.jar" "-javaagent:C:\Users\veraj00\AppData\Local\Programs\IntelliJ IDEA Ultimate\lib\idea_rt.jar=56049" -Dfile.encoding=UTF-8 -classpath C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\boot\plexus-classworlds-2.8.0.jar;C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\boot\plexus-classworlds.license org.codehaus.classworlds.Launcher -Didea.version=2025.1.2 compile
[INFO] Scanning for projects...
[INFO] 
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ demo ---
[INFO] Copying 1 resource from src\main\resources to target\classes
[INFO] 
[INFO] --- quarkus:3.23.3:generate-code (default) @ demo ---
[INFO] Generating with dryRun=false
[ERROR] Error resolving schema #/components/schemas/Pet
java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\ws\git\demo\src\main\openapi\petstore.json
    at java.net.URI$Parser.fail (URI.java:2976)
    at java.net.URI$Parser.checkChars (URI.java:3147)
    at java.net.URI$Parser.parse (URI.java:3183)
    at java.net.URI.<init> (URI.java:623)

On 3.0.0-SNAPSHOT

C:\Users\veraj00\.jdks\temurin-17.0.15\bin\java.exe -Dmaven.multiModuleProjectDirectory=C:\ws\git\demo -Djansi.passthrough=true -Dmaven.home=C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9 -Dclassworlds.conf=C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\bin\m2.conf "-Dmaven.ext.class.path=C:\Users\veraj00\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven-event-listener.jar" "-javaagent:C:\Users\veraj00\AppData\Local\Programs\IntelliJ IDEA Ultimate\lib\idea_rt.jar=56104" -Dfile.encoding=UTF-8 -classpath C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\boot\plexus-classworlds-2.8.0.jar;C:\Users\veraj00\.m2\wrapper\dists\apache-maven-3.9.9-bin\4nf9hui3q3djbarqar9g711ggc\apache-maven-3.9.9\boot\plexus-classworlds.license org.codehaus.classworlds.Launcher -Didea.version=2025.1.2 compile
[INFO] Scanning for projects...
[INFO] 
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ demo ---
[INFO] Copying 1 resource from src\main\resources to target\classes
[INFO] 
[INFO] --- quarkus:3.23.3:generate-code (default) @ demo ---
[INFO] Generating with dryRun=false
[WARNING] OpenAPI 3.1 support is still in beta. To report an issue related to 3.1 spec, please kindly open an issue in the Github repo: https://github.com/openAPITools/openapi-generator.
[INFO] No .openapi-generator-ignore file found.
[INFO] OpenAPI Generator: quarkus (client)
[INFO] Generator 'quarkus' is considered stable.
[INFO] Environment variable JAVA_POST_PROCESS_FILE not defined so the Java code may not be properly formatted. To define it, try 'export JAVA_POST_PROCESS_FILE="/usr/local/bin/clang-format -i"' (Linux/Mac)
[INFO] NOTE: To enable file post-processing, 'enablePostProcessFile' must be set to `true` (--enable-post-process-file for CLI).
[INFO] Inline schema created as Pet_category. To have complete control of the model name, set the `title` field or use the modelNameMapping option (e.g. --model-name-mappings Pet_category=NewModel,ModelA=NewModelA in CLI) or inlineSchemaNameMapping option (--inline-schema-name-mappings Pet_category=NewModel,ModelA=NewModelA in CLI).
[... etc]

[jcjveraa]

@ricardozanini I can't seem to add labels here? If approved, please backport to the 2.X.X-lts branch.

[ricardozanini]

Merging since I'm getting this on #1185 too and I want to give the credits to @jcjveraa