Import code from internal repository to git

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

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+// 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 org.joda.time.Duration;
+import org.joda.time.Period;
+
+/** Duration CLI parameter converter/validator. */
+public final class DurationParameter extends ParameterConverterValidator<Duration> {
+
+  public DurationParameter() {
+    super("not an ISO-8601 duration (e.g. PT36H)");
+  }
+
+  @Override
+  public Duration convert(String value) {
+    return Period.parse(value).toStandardDuration();
+  }
+}