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Allow specifying library name through system property #80

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Merged
llongi merged 1 commit into from
May 9, 2025
Merged

Allow specifying library name through system property #80

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25 changes: 19 additions & 6 deletions src/main/java/org/usb4java/Loader.java
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Original file line number Diff line number Diff line change
Expand Up @@ -300,6 +300,11 @@ private static String extractLibrary(final String platform,
* times. Duplicate calls are ignored. This method is automatically called
* when the {@link LibUsb} class is loaded. When you need to do it earlier
* (To catch exceptions for example) then simply call this method manually.
* <p/>
* If the system property <tt>org.usb4java.LibraryName</tt> is defined, then
* instead of going through the classpath looking for the appropriate DLL,
* extracting it, etc., we simply call {@link System#loadLibrary}, passing
* in the value of the property.
*
* @throws LoaderException
* When loading the native wrapper libraries failed.
Expand All @@ -313,13 +318,21 @@ public static synchronized void load()
}

loaded = true;
final String platform = getPlatform();
final String lib = getLibName();
final String extraLib = getExtraLibName();
if (extraLib != null)
final String libraryName = System.getProperty("org.usb4java.LibraryName");
if (libraryName != null)
{
System.load(extractLibrary(platform, extraLib));
System.loadLibrary(libraryName);
}
else
{
final String platform = getPlatform();
final String lib = getLibName();
final String extraLib = getExtraLibName();
if (extraLib != null)
{
System.load(extractLibrary(platform, extraLib));
}
System.load(extractLibrary(platform, lib));
}
System.load(extractLibrary(platform, lib));
}
}