Import code from internal repository to git

java/com/google/domain/registry/tools/params/LoggingLevelParameter.java

@@ -0,0 +1,35 @@
+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed 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 com.google.domain.registry.tools.params;
+
+import java.util.logging.Level;
+
+/**
+ * Java logging level CLI parameter converter/validator.
+ * <p>
+ * If Level were an enum then this wouldn't be needed since JCommander has built-in conversion
+ * support for enums, but Level is actually just a regular class with some static instances.
+ */
+public final class LoggingLevelParameter extends ParameterConverterValidator<Level> {
+
+  public LoggingLevelParameter() {
+    super("not a recognized logging level");
+  }
+
+  @Override
+  public Level convert(String value) {
+    return Level.parse(value);
+  }
+}