From a59ddba0d41b0ba1ea9c8c6ac541a71d737cdf30 Mon Sep 17 00:00:00 2001
From: Michael Simacek <msimacek@redhat.com>
Date: Tue, 6 Jun 2017 13:47:43 +0200
Subject: [PATCH 2/3] Invoke logback via reflection

---
 .../cli/logging/impl/LogbackConfiguration.java | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/LogbackConfiguration.java b/maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/LogbackConfiguration.java
index 4dc5a37b8..a977ba085 100644
--- a/maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/LogbackConfiguration.java
+++ b/maven-embedder/src/main/java/org/apache/maven/cli/logging/impl/LogbackConfiguration.java
@@ -31,21 +31,29 @@
 public class LogbackConfiguration extends BaseSlf4jConfiguration {
     @Override
     public void setRootLoggerLevel(Level level) {
-        ch.qos.logback.classic.Level value;
+        String value;
         switch (level) {
             case DEBUG:
-                value = ch.qos.logback.classic.Level.DEBUG;
+                value = "DEBUG";
                 break;
 
             case INFO:
-                value = ch.qos.logback.classic.Level.INFO;
+                value = "INFO";
                 break;
 
             default:
-                value = ch.qos.logback.classic.Level.ERROR;
+                value = "ERROR";
                 break;
         }
-        ((ch.qos.logback.classic.Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME)).setLevel(value);
+        Logger logger = LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        try {
+            Class<?> levelClass = Class.forName("ch.qos.logback.classic.Level");
+            Object logbackLevel = levelClass.getField(value).get(null);
+            Class<?> loggerClass = Class.forName("ch.qos.logback.classic.Logger");
+            loggerClass.getMethod("setLevel", new Class<?>[] {levelClass}).invoke(logger, new Object[] {logbackLevel});
+        } catch (Exception e) {
+            throw new RuntimeException("Failed to initialize logback configuration", e);
+        }
     }
 
     @Override
-- 
2.39.2