Fonts in the class path makes fonts listing fail

When using fonts embedded in a .jar file in the class path
(https://xmlgraphics.apache.org/fop/2.1/fonts.html#autodetect), fonts
listing fails with this exception:

org.apache.fop.cli.Main startFOP
GRAVE: Exception
java.lang.IllegalArgumentException: URI is not hierarchical
    at java.io.File.<init>(File.java:418)
    at org.apache.fop.fonts.FontCache.addFont(FontCache.java:335)
    at
org.apache.fop.fonts.autodetect.FontInfoFinder.getFontInfoFromCustomFont(FontInfoFinder.java:157)
    at
org.apache.fop.fonts.autodetect.FontInfoFinder.find(FontInfoFinder.java:269)
    at org.apache.fop.fonts.FontAdder.add(FontAdder.java:63)
    at
org.apache.fop.fonts.FontDetectorFactory$DefaultFontDetector.detect(FontDetectorFactory.java:110)
    at
org.apache.fop.fonts.FontManager.autoDetectFonts(FontManager.java:229)
    at
org.apache.fop.fonts.DefaultFontConfigurator.configure(DefaultFontConfigurator.java:82)
    at
org.apache.fop.render.PrintRendererConfigurator.getCustomFontCollection(PrintRendererConfigurator.java:147)
    at
org.apache.fop.render.PrintRendererConfigurator.setupFontInfo(PrintRendererConfigurator.java:127)
    at org.apache.fop.render.intermediate.IFUtil.setupFonts(IFUtil.java:170)
    at
org.apache.fop.render.intermediate.IFRenderer.setupFontInfo(IFRenderer.java:187)
    at org.apache.fop.area.RenderPagesModel.<init>(RenderPagesModel.java:75)
    at
org.apache.fop.area.AreaTreeHandler.setupModel(AreaTreeHandler.java:135)
    at org.apache.fop.area.AreaTreeHandler.<init>(AreaTreeHandler.java:105)
    at
org.apache.fop.render.RendererFactory.createFOEventHandler(RendererFactory.java:350)
    at org.apache.fop.fo.FOTreeBuilder.<init>(FOTreeBuilder.java:107)
    at org.apache.fop.apps.Fop.createDefaultHandler(Fop.java:104)
    at org.apache.fop.apps.Fop.<init>(Fop.java:78)
    at org.apache.fop.apps.FOUserAgent.newFop(FOUserAgent.java:182)
    at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:107)
    at org.apache.fop.cli.Main.startFOP(Main.java:186)
    at org.apache.fop.cli.Main.main(Main.java:217)

I found a way around this by using a custom resolver that will discard
any "jar: ..." URI.

I use fonts in a jar file for them to be taken into account by JEuclid
(I didn't find any other way so far).

I finally made this work by duplicating the fonts in the jar file in a
regular folder (so I must maintain 2 copies of each file).

I'm using FOP 2.1 (from
https://xmlgraphics.apache.org/fop/download.html) under Ubuntu 14.04 LTS
Linux.

BR,

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*NeoDoc*
*Maxime Bégnis*
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