LoggerPreprocessor: name Logger by label attribute

If label is specified in the @parameter annotation,
the logger is given a name matching the provided label.

Signed-off-by: Curtis Rueden <ctrueden@wisc.edu>

Author: maarzt

src/main/java/org/scijava/module/process/LoggerPreprocessor.java

@@ -65,9 +65,13 @@ public void process(final Module module) {
 			Logger.class);
 		if (loggerInput == null || !loggerInput.isAutoFill()) return;
 
+		String loggerName = loggerInput.getLabel();
+		if(loggerName.isEmpty())
+			loggerName = module.getDelegateObject().getClass().getSimpleName();
+		Logger logger = logService.subLogger(loggerName);
+
 		final String name = loggerInput.getName();
-		module.setInput(name, logService.subLogger(module.getDelegateObject()
-			.getClass().getSimpleName()));
+		module.setInput(name, logger);
 		module.resolveInput(name);
 	}
 

src/test/java/org/scijava/module/process/LoggerPreprocessorTest.java

@@ -38,13 +38,13 @@
 import org.junit.Test;
 import org.scijava.Context;
 import org.scijava.command.Command;
-import org.scijava.command.CommandModule;
 import org.scijava.command.CommandService;
 import org.scijava.log.LogService;
 import org.scijava.log.Logger;
 import org.scijava.log.TestLogListener;
 import org.scijava.plugin.Parameter;
-import org.scijava.plugin.Plugin;
+
+import static org.junit.Assert.assertEquals;
 
 /**
  * Tests {@link LoggerPreprocessor}.
@@ -57,16 +57,13 @@ public class LoggerPreprocessorTest {
 	public void testInjection() throws InterruptedException, ExecutionException {
 		final Context context = new Context(CommandService.class);
 		final CommandService commandService = context.service(CommandService.class);
-		final LogService logService = context.service(LogService.class);
 		final TestLogListener listener = new TestLogListener();
-		logService.addListener(listener);
+		context.service(LogService.class).addListener(listener);
 
-		final CommandModule module = //
-				commandService.run(CommandWithLogger.class, true).get();
+		commandService.run(CommandWithLogger.class, true).get();
 		assertTrue(listener.hasLogged(m -> m.source().path().contains(CommandWithLogger.class.getSimpleName())));
 	}
 
-	@Plugin(type = Command.class)
 	public static class CommandWithLogger implements Command {
 
 		@Parameter
@@ -78,4 +75,21 @@ public void run() {
 		}
 	}
 
+	@Test
+	public void testLoggerNameByAnnotation() throws ExecutionException, InterruptedException {
+		final Context context = new Context(CommandService.class);
+		final CommandService commandService = context.service(CommandService.class);
+		commandService.run(CommandWithNamedLogger.class, true).get();
+	}
+
+	public static class CommandWithNamedLogger implements Command {
+
+		@Parameter(label = "MyLoggerName")
+		public Logger log;
+
+		@Override
+		public void run() {
+			assertEquals("MyLoggerName", log.getName());
+		}
+	}
 }