This package provides a subsystem for SciJava applications that enables handling of URI-based links via plugins.

It is kept separate from the SciJava Common core classes because it requires Java 11 as a minimum, due to its use of java.awt.Desktop features not present in Java 8.

• Link handling: Register custom handlers for URI schemes through the LinkHandler plugin interface
• CLI integration: Automatic handling of URI arguments passed on the command line via ConsoleArgument
• OS integration: Automatic registration of URI schemes with the operating system (Windows supported, macOS/Linux planned)

Implement the LinkHandler interface to handle custom URI schemes:

@Plugin(type = LinkHandler.class)
public class MyLinkHandler extends AbstractLinkHandler {

    @Override
    public boolean supports(URI uri) {
        return "myapp".equals(uri.getScheme());
    }

    @Override
    public void handle(URI uri) {
        // Handle the URI
        System.out.println("Handling: " + uri);
    }

    @Override
    public List<String> getSchemes() {
        // Return schemes to register with the OS
        return Arrays.asList("myapp");
    }
}

On Windows, URI schemes returned by LinkHandler.getSchemes() are automatically registered in the Windows Registry when the LinkService initializes. This allows users to click links like myapp://action in web browsers or other applications, which will launch your Java application with the URI as a command-line argument.

The registration uses HKEY_CURRENT_USER and requires no administrator privileges.

See doc/WINDOWS.md for details.

• LinkService - Service for routing URIs to appropriate handlers
• LinkHandler - Plugin interface for implementing custom URI handlers
• LinkArgument - Console argument plugin that recognizes URIs on the command line
• SchemeInstaller - Interface for OS-specific URI scheme registration
• WindowsSchemeInstaller - Windows implementation using registry commands

The launcher should set the scijava.app.executable system property to enable URI scheme registration.