Import code from internal repository to git

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

@@ -0,0 +1,53 @@
+// 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.common.base.Preconditions.checkArgument;
+
+import com.google.common.base.Joiner;
+import com.google.common.collect.ImmutableSet;
+import com.google.domain.registry.model.registry.label.ReservedList;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.Parameters;
+
+/**
+ * Command to delete a {@link ReservedList} in Datastore. This command will fail if the reserved
+ * list is currently in use on a tld.
+ */
+@Parameters(separators = " =", commandDescription = "Deletes a ReservedList in Datastore.")
+final class DeleteReservedListCommand extends MutatingCommand {
+
+  @Parameter(
+      names = {"-n", "--name"},
+      description = "The name of the reserved list to delete.",
+      required = true)
+  private String name;
+
+  @Override
+  protected void init() throws Exception {
+    checkArgument(
+        ReservedList.get(name).isPresent(),
+        "Cannot delete the reserved list %s because it doesn't exist.",
+        name);
+    ReservedList existing = ReservedList.get(name).get();
+    ImmutableSet<String> tldsUsedOn = existing.getReferencingTlds();
+    checkArgument(
+        tldsUsedOn.isEmpty(),
+        "Cannot delete reserved list because it is used on these tld(s): %s",
+        Joiner.on(", ").join(tldsUsedOn));
+    stageEntityChange(existing, null);
+  }
+}