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/*******************************************************************************
* Copyright (c) 2011 GitHub Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Jason Tsay (GitHub Inc.) - initial API and implementation
*******************************************************************************/
package org.eclipse.egit.github.core.client;
import static com.google.gson.FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES;
import static org.eclipse.egit.github.core.event.Event.TYPE_COMMIT_COMMENT;
import static org.eclipse.egit.github.core.event.Event.TYPE_CREATE;
import static org.eclipse.egit.github.core.event.Event.TYPE_DELETE;
import static org.eclipse.egit.github.core.event.Event.TYPE_DOWNLOAD;
import static org.eclipse.egit.github.core.event.Event.TYPE_FOLLOW;
import static org.eclipse.egit.github.core.event.Event.TYPE_FORK;
import static org.eclipse.egit.github.core.event.Event.TYPE_FORK_APPLY;
import static org.eclipse.egit.github.core.event.Event.TYPE_GIST;
import static org.eclipse.egit.github.core.event.Event.TYPE_GOLLUM;
import static org.eclipse.egit.github.core.event.Event.TYPE_ISSUES;
import static org.eclipse.egit.github.core.event.Event.TYPE_ISSUE_COMMENT;
import static org.eclipse.egit.github.core.event.Event.TYPE_MEMBER;
import static org.eclipse.egit.github.core.event.Event.TYPE_PUBLIC;
import static org.eclipse.egit.github.core.event.Event.TYPE_PULL_REQUEST;
import static org.eclipse.egit.github.core.event.Event.TYPE_PULL_REQUEST_REVIEW_COMMENT;
import static org.eclipse.egit.github.core.event.Event.TYPE_PUSH;
import static org.eclipse.egit.github.core.event.Event.TYPE_RELEASE;
import static org.eclipse.egit.github.core.event.Event.TYPE_TEAM_ADD;
import static org.eclipse.egit.github.core.event.Event.TYPE_WATCH;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import java.lang.reflect.Type;
import java.util.Date;
import org.eclipse.egit.github.core.event.CommitCommentPayload;
import org.eclipse.egit.github.core.event.CreatePayload;
import org.eclipse.egit.github.core.event.DeletePayload;
import org.eclipse.egit.github.core.event.DownloadPayload;
import org.eclipse.egit.github.core.event.Event;
import org.eclipse.egit.github.core.event.EventPayload;
import org.eclipse.egit.github.core.event.FollowPayload;
import org.eclipse.egit.github.core.event.ForkApplyPayload;
import org.eclipse.egit.github.core.event.ForkPayload;
import org.eclipse.egit.github.core.event.GistPayload;
import org.eclipse.egit.github.core.event.GollumPayload;
import org.eclipse.egit.github.core.event.IssueCommentPayload;
import org.eclipse.egit.github.core.event.IssuesPayload;
import org.eclipse.egit.github.core.event.MemberPayload;
import org.eclipse.egit.github.core.event.PublicPayload;
import org.eclipse.egit.github.core.event.PullRequestPayload;
import org.eclipse.egit.github.core.event.PullRequestReviewCommentPayload;
import org.eclipse.egit.github.core.event.PushPayload;
import org.eclipse.egit.github.core.event.ReleasePayload;
import org.eclipse.egit.github.core.event.TeamAddPayload;
import org.eclipse.egit.github.core.event.WatchPayload;
/**
* Formats an event's payload with the appropriate class given a certain event
* type
*/
public class EventFormatter implements JsonDeserializer<Event> {
private final Gson gson = new GsonBuilder()
.registerTypeAdapter(Date.class, new DateFormatter())
.setFieldNamingPolicy(LOWER_CASE_WITH_UNDERSCORES).create();
public Event deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context) throws JsonParseException {
final Event event = gson.fromJson(json, Event.class);
if (event == null || !json.isJsonObject())
return event;
final JsonElement rawPayload = json.getAsJsonObject().get("payload");
if (rawPayload == null || !rawPayload.isJsonObject())
return event;
final String type = event.getType();
if (type == null || type.length() == 0)
return event;
Class<? extends EventPayload> payloadClass;
if (TYPE_COMMIT_COMMENT.equals(type))
payloadClass = CommitCommentPayload.class;
else if (TYPE_CREATE.equals(type))
payloadClass = CreatePayload.class;
else if (TYPE_DELETE.equals(type))
payloadClass = DeletePayload.class;
else if (TYPE_DOWNLOAD.equals(type))
payloadClass = DownloadPayload.class;
else if (TYPE_FOLLOW.equals(type))
payloadClass = FollowPayload.class;
else if (TYPE_FORK.equals(type))
payloadClass = ForkPayload.class;
else if (TYPE_FORK_APPLY.equals(type))
payloadClass = ForkApplyPayload.class;
else if (TYPE_GIST.equals(type))
payloadClass = GistPayload.class;
else if (TYPE_GOLLUM.equals(type))
payloadClass = GollumPayload.class;
else if (TYPE_ISSUE_COMMENT.equals(type))
payloadClass = IssueCommentPayload.class;
else if (TYPE_ISSUES.equals(type))
payloadClass = IssuesPayload.class;
else if (TYPE_MEMBER.equals(type))
payloadClass = MemberPayload.class;
else if (TYPE_PUBLIC.equals(type))
payloadClass = PublicPayload.class;
else if (TYPE_PULL_REQUEST.equals(type))
payloadClass = PullRequestPayload.class;
else if (TYPE_PULL_REQUEST_REVIEW_COMMENT.equals(type))
payloadClass = PullRequestReviewCommentPayload.class;
else if (TYPE_PUSH.equals(type))
payloadClass = PushPayload.class;
else if (TYPE_RELEASE.equals(type))
payloadClass = ReleasePayload.class;
else if (TYPE_TEAM_ADD.equals(type))
payloadClass = TeamAddPayload.class;
else if (TYPE_WATCH.equals(type))
payloadClass = WatchPayload.class;
else
return event;
try {
EventPayload typedPayload = context.deserialize(rawPayload,
payloadClass);
return event.setPayload(typedPayload);
} catch (JsonParseException jpe) {
// Parse exception here denotes legacy payloads with differing
// fields than built-in payload classes provide
return event;
}
}
}
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