Could not initialize class org.docx4j.fonts.IdentityPlusMapper on loading AppleSDGothicNeo.ttc font for MacOs + java 11

[llmartinll]

Good day

This is the first time trying to check out and run the project.
After a cloning the project and running mvn clean install on

• macOs 14.5
• azul 17.0.11
• https://github.com/plutext/docx4j/tree/VERSION_11_5_1

I noticed that the RunFontSelectorCalibriCheckBoxTest fails

java.lang.NoClassDefFoundError: Could not initialize class org.docx4j.fonts.IdentityPlusMapper
	at org.docx4j.openpackaging.packages.WordprocessingMLPackage.getFontMapper(WordprocessingMLPackage.java:375)
...
Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.RuntimeException: java.lang.NullPointerException: Cannot invoke "org.docx4j.fonts.fop.fonts.CustomFont.getStrippedFontName()" because "customFont" is null [in thread "main"]
	at org.docx4j.fonts.IdentityPlusMapper.<clinit>(IdentityPlusMapper.java:77)
	at org.docx4j.openpackaging.packages.WordprocessingMLPackage.getFontMapper(WordprocessingMLPackage.java:375)
	at org.docx4j.fonts.RunFontSelectorCalibriCheckBoxTest.testFont(RunFontSelectorCalibriCheckBoxTest.java:64)

When debugging via Intellij and found out it breaks on loading in the physical font AppleSDGothicNeo which is included by default in mac os in /System/Library/Fonts

This issue might be the same issue as #507 but there's little information there.

The test breaks on loading in IdentityPlusMapper , after trying to load in the discoveryPhysicalFonts which tries to add the font file:/System/Library/Fonts/AppleSDGothicNeo.ttc for which no customFont can be determined at

docx4j/docx4j-core/src/main/java/org/docx4j/fonts/fop/fonts/autodetect/FontInfoFinder.java

Line 242 in c097975

customFont = ttfLoader.getFont();

which re-sets customFont to null which causes code further down the chain to throw.

In attempt to find out why it could not load the font; I found out that it throws an IO exception at

docx4j/docx4j-core/src/main/java/org/docx4j/fonts/fop/fonts/truetype/OFFontLoader.java

Line 120 in c097975

OpenFont otf = (isCFF) ? new OTFFile(useKerning, useAdvanced) : new TTFFile(useKerning, useAdvanced);

isCFF being false, it will call new TTFFile(userKerning: true, useAdvanced: false) and throw with error message

'loca' table not found, happens when the font file doesn't contain TrueType outlines (trying to read an OpenType CFF font maybe?)

This is where I ended up.

I'm not very knowledgeable about font types but the structure of this font appears to be different than other system fonts
From what I can gather online, it's a font for the Korean language.