JAL-3541 selectively merged build.gradle and gradle.properties

[jalview.git] / srcjar_unused / org / apache / log4j / spi / RootLogger.java

diff --git a/srcjar_unused/org/apache/log4j/spi/RootLogger.java b/srcjar_unused/org/apache/log4j/spi/RootLogger.java
new file mode 100644 (file)
index 0000000..a9ffd74
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+++ b/srcjar_unused/org/apache/log4j/spi/RootLogger.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.log4j.spi;
+
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+import org.apache.log4j.helpers.LogLog;
+
+
+// Contibutors: Mathias Bogaert
+
+/**
+   RootLogger sits at the top of the logger hierachy. It is a
+   regular logger except that it provides several guarantees.
+
+   <p>First, it cannot be assigned a <code>null</code>
+   level. Second, since root logger cannot have a parent, the
+   {@link #getChainedLevel} method always returns the value of the
+   level field without walking the hierarchy.
+
+   @author Ceki G&uuml;lc&uuml;
+
+ */
+public final class RootLogger extends Logger {
+  /**
+     The root logger names itself as "root". However, the root
+     logger cannot be retrieved by name.
+  */
+  public RootLogger(Level level) {
+    super("root");
+    setLevel(level);
+  }
+
+  /**
+     Return the assigned level value without walking the logger
+     hierarchy.
+  */
+  public final Level getChainedLevel() {
+    return level;
+  }
+
+  /**
+     Setting a null value to the level of the root logger may have catastrophic
+     results. We prevent this here.
+
+     @since 0.8.3 */
+  public final void setLevel(Level level) {
+    if (level == null) {
+      LogLog.error(
+        "You have tried to set a null level to root.", new Throwable());
+    } else {
+      this.level = level;
+    }
+  }
+
+}