| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * |
| * 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 org.apache.streams.twitter.converter; |
| |
| import org.apache.streams.data.ActivityConverter; |
| import org.apache.streams.exceptions.ActivityConversionException; |
| import org.apache.streams.pojo.json.Activity; |
| import org.apache.streams.pojo.json.ActivityObject; |
| import org.apache.streams.twitter.pojo.UserstreamEvent; |
| |
| import org.apache.commons.lang.NotImplementedException; |
| import org.apache.commons.lang3.StringUtils; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| import static org.apache.streams.twitter.converter.util.TwitterActivityUtil.formatId; |
| import static org.apache.streams.twitter.converter.util.TwitterActivityUtil.getProvider; |
| |
| |
| /** |
| * TwitterJsonUserstreameventActivityConverter. |
| */ |
| // TODO: Use this class explicitely somewhere |
| public class TwitterJsonUserstreameventActivityConverter implements ActivityConverter<UserstreamEvent> { |
| |
| public static Class requiredClass = UserstreamEvent.class; |
| |
| @Override |
| public Class requiredClass() { |
| return requiredClass; |
| } |
| |
| private static TwitterJsonUserstreameventActivityConverter instance = new TwitterJsonUserstreameventActivityConverter(); |
| |
| public static TwitterJsonUserstreameventActivityConverter getInstance() { |
| return instance; |
| } |
| |
| @Override |
| public String serializationFormat() { |
| return null; |
| } |
| |
| @Override |
| public UserstreamEvent fromActivity(Activity deserialized) throws ActivityConversionException { |
| throw new NotImplementedException(); |
| } |
| |
| @Override |
| public List<UserstreamEvent> fromActivityList(List<Activity> list) { |
| throw new NotImplementedException(); |
| } |
| |
| @Override |
| public List<Activity> toActivityList(UserstreamEvent userstreamEvent) throws ActivityConversionException { |
| |
| Activity activity = convert(userstreamEvent); |
| return Stream.of(activity).collect(Collectors.toList()); |
| |
| } |
| |
| @Override |
| public List<Activity> toActivityList(List<UserstreamEvent> serializedList) { |
| return null; |
| } |
| |
| /** |
| * convert UserstreamEvent to Activity. |
| * @param event UserstreamEvent |
| * @return Activity |
| * @throws ActivityConversionException ActivityConversionException |
| */ |
| public Activity convert(UserstreamEvent event) throws ActivityConversionException { |
| |
| Activity activity = new Activity(); |
| activity.setActor(buildActor(event)); |
| activity.setVerb(detectVerb(event)); |
| activity.setObject(buildActivityObject(event)); |
| activity.setId(formatId(activity.getVerb())); |
| if (StringUtils.isEmpty(activity.getId())) { |
| throw new ActivityConversionException("Unable to determine activity id"); |
| } |
| activity.setProvider(getProvider()); |
| return activity; |
| } |
| |
| /** |
| * build ActivityObject from UserstreamEvent |
| * @param event UserstreamEvent |
| * @return $.actor |
| */ |
| public ActivityObject buildActor(UserstreamEvent event) { |
| return new ActivityObject(); |
| } |
| |
| /** |
| * build ActivityObject from UserstreamEvent |
| * @param event UserstreamEvent |
| * @return $.object |
| */ |
| public ActivityObject buildActivityObject(UserstreamEvent event) { |
| return new ActivityObject(); |
| } |
| |
| public String detectVerb(UserstreamEvent event) { |
| return null; |
| } |
| |
| public ActivityObject buildTarget(UserstreamEvent event) { |
| return null; |
| } |
| |
| } |