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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
107 lines
3.8 KiB
Java
107 lines
3.8 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.poll;
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import static google.registry.model.ofy.ObjectifyService.ofy;
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import com.google.common.base.Converter;
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import com.google.common.base.Splitter;
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import com.google.common.collect.ImmutableBiMap;
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import com.googlecode.objectify.Key;
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import google.registry.model.EppResource;
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import google.registry.model.contact.ContactResource;
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import google.registry.model.domain.DomainBase;
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import google.registry.model.host.HostResource;
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import google.registry.model.reporting.HistoryEntry;
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import java.util.List;
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/**
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* A converter between external key strings for PollMessages and Objectify Keys to the resource.
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*
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* <p>The format of the key string is A-B-C-D-E as follows:
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*
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* <pre>
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* A = EppResource.typeId (decimal)
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* B = EppResource.repoId prefix (STRING)
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* C = EppResource.repoId suffix (STRING)
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* D = HistoryEntry.id (decimal)
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* E = PollMessage.id (decimal)
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* </pre>
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*/
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public class PollMessageExternalKeyConverter extends Converter<Key<PollMessage>, String> {
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/** An exception thrown when an external key cannot be parsed. */
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public static class PollMessageExternalKeyParseException extends RuntimeException {}
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/**
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* A map of IDs used in external keys corresponding to which EppResource class the poll message
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* belongs to.
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*/
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public static final ImmutableBiMap<Class<? extends EppResource>, Long> EXTERNAL_KEY_CLASS_ID_MAP =
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ImmutableBiMap.<Class<? extends EppResource>, Long>of(
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DomainBase.class, 1L,
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ContactResource.class, 2L,
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HostResource.class, 3L);
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@Override
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protected String doForward(Key<PollMessage> key) {
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@SuppressWarnings("unchecked")
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Key<EppResource> ancestorResource =
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(Key<EppResource>) (Key<?>) key.getParent().getParent();
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long externalKeyClassId = EXTERNAL_KEY_CLASS_ID_MAP.get(
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ofy().factory().getMetadata(ancestorResource.getKind()).getEntityClass());
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return String.format("%d-%s-%d-%d",
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externalKeyClassId,
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ancestorResource.getName(),
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key.getParent().getId(),
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key.getId());
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}
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/**
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* Returns an Objectify Key to a PollMessage corresponding with the external key string.
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*
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* @throws PollMessageExternalKeyParseException if the external key has an invalid format.
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*/
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@Override
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protected Key<PollMessage> doBackward(String externalKey) {
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List<String> idComponents = Splitter.on('-').splitToList(externalKey);
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if (idComponents.size() != 5) {
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throw new PollMessageExternalKeyParseException();
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}
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try {
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Class<?> resourceClazz =
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EXTERNAL_KEY_CLASS_ID_MAP.inverse().get(Long.parseLong(idComponents.get(0)));
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if (resourceClazz == null) {
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throw new PollMessageExternalKeyParseException();
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}
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return Key.create(
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Key.create(
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Key.create(
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null,
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resourceClazz,
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String.format("%s-%s", idComponents.get(1), idComponents.get(2))),
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HistoryEntry.class,
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Long.parseLong(idComponents.get(3))),
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PollMessage.class,
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Long.parseLong(idComponents.get(4)));
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} catch (NumberFormatException e) {
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throw new PollMessageExternalKeyParseException();
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}
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}
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}
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