Support version 0.12 of the EPP Fee Extension

The corresponding version of the specification is 8.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=127968603

java/google/registry/model/domain/fee12/FeeCheckCommandExtensionItemV12.java

@@ -0,0 +1,126 @@
+// Copyright 2016 The Domain Registry Authors. 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 google.registry.model.domain.fee12;
+
+import com.google.common.base.Ascii;
+import com.google.common.base.CharMatcher;
+import com.google.common.base.Optional;
+import google.registry.model.ImmutableObject;
+import google.registry.model.domain.Period;
+import google.registry.model.domain.fee.FeeCheckCommandExtensionItem;
+import google.registry.model.domain.fee.FeeCheckResponseExtensionItem;
+import javax.xml.bind.annotation.XmlAttribute;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlType;
+import org.joda.money.CurrencyUnit;
+import org.joda.time.DateTime;
+
+/**
+ * An individual price check item in version 0.12 of the fee extension on domain check commands.
+ * Items look like:
+ * 
+ * <fee:command name="renew" phase="sunrise" subphase="hello">
+ *   <fee:period unit="y">1</fee:period>
+ *   <fee:class>premium</fee:class>
+ *   <fee:date>2017-05-17T13:22:21.0Z</fee:date>
+ * </fee:command>
+ * 
+ * In a change from previous versions of the extension, items do not contain domain names; instead,
+ * the names from the non-extension check element are used.
+ */
+@XmlType(propOrder = {"period", "feeClass", "feeDate"})
+public class FeeCheckCommandExtensionItemV12
+    extends ImmutableObject implements FeeCheckCommandExtensionItem {
+
+  /** The default validity period (if not specified) is 1 year for all operations. */
+  static final Period DEFAULT_PERIOD = Period.create(1, Period.Unit.YEARS);
+
+  @XmlAttribute(name = "name")
+  String commandName;
+  
+  @XmlAttribute
+  String phase;
+
+  @XmlAttribute
+  String subphase;
+
+  @XmlElement
+  Period period;
+ 
+  @XmlElement(name = "class")
+  String feeClass;
+  
+  @XmlElement(name = "date")
+  DateTime feeDate;
+
+  /** Version .12 does not support domain name or currency in fee extension items. */
+  @Override
+  public boolean isDomainNameSupported() {
+    return false;
+  }
+
+  @Override
+  public String getDomainName() {
+    throw new UnsupportedOperationException("Domain not supported");
+  }
+  
+  @Override
+  public boolean isCurrencySupported() {
+    return false;
+  }
+  
+  @Override
+  public CurrencyUnit getCurrency() {
+    throw new UnsupportedOperationException("Currency not supported");
+  }
+  
+  @Override
+  public String getUnparsedCommandName() {
+    return commandName;
+  }
+  
+  @Override
+  public CommandName getCommandName() {
+    // Require the xml string to be lowercase.
+    if (commandName != null && CharMatcher.javaLowerCase().matchesAllOf(commandName)) {
+      try {
+        return CommandName.valueOf(Ascii.toUpperCase(commandName));
+      } catch (IllegalArgumentException e) {
+        // Swallow this and return UNKNOWN below because there's no matching CommandName.
+      }
+    }
+    return CommandName.UNKNOWN;
+  }
+
+  @Override
+  public String getPhase() {
+    return phase;
+  }
+  
+  @Override
+  public String getSubphase() {
+    return subphase;
+  }
+
+  @Override
+  public Period getPeriod() {
+    return Optional.fromNullable(period).or(DEFAULT_PERIOD);
+  }
+
+  @Override
+  public FeeCheckResponseExtensionItem.Builder createResponseBuilder() {
+    return new FeeCheckResponseExtensionItemV12.Builder();
+  }
+}