From 5026a97e2ed96f7e1fe90e59f67d23cf77b25812 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolan.mcnamara@collabora.com>
Date: Tue, 22 Sep 2026 14:41:49 +0000
Subject: [PATCH] a Java class path entry has to be a plain local file URL
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with no host and an absolute path

follow on from "translate only file URLs"
(Change-Id I41076b8af670d673bf29b14c02db0c66744feb0b)

Signed-off-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Change-Id: I6025f3e627c51d83479e7f79a53841384b326442
Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/13322
Tested-by: Jenkins CPCI <releng@collaboraoffice.com>
Reviewed-by: Stephan Bergmann <stephan.bergmann@collabora.com>
Reviewed-by: Michael Stahl <michael.stahl@collabora.com>
(cherry picked from commit cb4680770e2d558fa474fb7d3e3483885941d70a)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/211548
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
---
 jvmaccess/source/classpath.cxx | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/jvmaccess/source/classpath.cxx b/jvmaccess/source/classpath.cxx
index bb0b16bc0220..b4c6331e6113 100644
--- a/jvmaccess/source/classpath.cxx
+++ b/jvmaccess/source/classpath.cxx
@@ -33,6 +33,7 @@
 #include <com/sun/star/uri/XVndSunStarExpandUrlReference.hpp>
 #include <com/sun/star/util/theMacroExpander.hpp>
 #include <cppuhelper/exc_hlp.hxx>
+#include <rtl/uri.hxx>
 #include <rtl/ustring.hxx>
 #include <sal/types.h>
 #include <o3tl/string_view.hxx>
@@ -79,7 +80,21 @@ jobjectArray jvmaccess::ClassPath::translateToUrls(
             }
             css::uno::Reference< css::uri::XUriReference > uriRef(
                 css::uri::UriReferenceFactory::create(context)->parse(url));
-            if (!uriRef.is() || !uriRef->getScheme().equalsIgnoreAsciiCase("file"))
+            bool bLocal = uriRef.is() && uriRef->getScheme().equalsIgnoreAsciiCase("file");
+            if (bLocal && uriRef->hasAuthority())
+            {
+                OUString aAuthority(uriRef->getAuthority());
+                bLocal = aAuthority.isEmpty() || aAuthority.equalsIgnoreAsciiCase("localhost");
+            }
+            if (bLocal)
+            {
+                // Java reads a path that starts with two separators as a network share name.
+                OUString aPath(rtl::Uri::decode(uriRef->getPath(), rtl_UriDecodeWithCharset,
+                                                RTL_TEXTENCODING_UTF8));
+                bLocal = aPath.getLength() >= 2 && aPath[0] == '/' && aPath[1] != '/'
+                         && aPath[1] != '\\';
+            }
+            if (!bLocal)
             {
                 throw css::lang::IllegalArgumentException(
                     "non-local Java class path entry: " + url,