Import code from internal repository to git

java/com/google/domain/registry/tools/ConvertIdnCommand.java

@@ -0,0 +1,48 @@
+// 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;
+
+import static com.google.domain.registry.util.DomainNameUtils.ACE_PREFIX;
+import static com.google.domain.registry.util.DomainNameUtils.canonicalizeDomainName;
+
+import com.google.domain.registry.tools.Command.GtechCommand;
+import com.google.domain.registry.util.Idn;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.Parameters;
+
+import java.io.IOException;
+import java.util.List;
+
+/** Command to convert IDN labels to/from punycode. */
+@Parameters(commandDescription = "Convert IDNs to/from punycode")
+final class ConvertIdnCommand implements Command, GtechCommand {
+
+  @Parameter(
+      description = "Labels to convert",
+      required = true)
+  private List<String> mainParameters;
+
+  @Override
+  public void run() throws IOException {
+    for (String label : mainParameters) {
+      if (label.startsWith(ACE_PREFIX)) {
+        System.out.println(Idn.toUnicode(label.toLowerCase()));
+      } else {
+        System.out.println(canonicalizeDomainName(label));
+      }
+    }
+  }
+}