Import code from internal repository to git

java/com/google/domain/registry/tools/params/PhoneNumberParameter.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 static com.google.common.base.Preconditions.checkArgument;
+
+import java.util.regex.Pattern;
+
+/** Phone number CLI parameter converter/validator. */
+public final class PhoneNumberParameter extends ParameterConverterValidator<String> {
+
+  private static final Pattern ICANN_E164 = Pattern.compile("(\\+[0-9]{1,3}\\.[0-9]{1,14})?");
+
+  public PhoneNumberParameter() {
+    super("Must be a valid +E.164 phone number, e.g. +1.2125650000");
+  }
+
+  @Override
+  public String convert(String value) {
+    checkArgument(ICANN_E164.matcher(value).matches());
+    return value;
+  }
+}