Github user steveblackmon commented on a diff in the pull request:
https://github.com/apache/incubator-streams/pull/202#discussion_r27688659
--- Diff:
streams-contrib/streams-provider-twitter/src/main/java/org/apache/streams/twitter/converter/TwitterFollowActivityConverter.java
---
@@ -0,0 +1,84 @@
+/*
+ * 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 com.google.common.collect.Lists;
+import org.apache.commons.lang.NotImplementedException;
+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.pojo.json.Provider;
+import org.apache.streams.twitter.pojo.Follow;
+import org.apache.streams.twitter.converter.util.TwitterActivityUtil;
+
+import java.io.Serializable;
+import java.util.List;
+
+public class TwitterFollowActivityConverter implements
ActivityConverter<Follow>, Serializable {
+
+ public TwitterFollowActivityConverter() {
+ }
+
+ private static TwitterFollowActivityConverter instance = new
TwitterFollowActivityConverter();
+
+ public static TwitterFollowActivityConverter getInstance() {
+ return instance;
+ }
+
+ public static Class requiredClass = Follow.class;
+
+ @Override
+ public Class requiredClass() {
+ return requiredClass;
+ }
+
+ @Override
+ public String serializationFormat() {
+ return null;
+ }
+
+ @Override
+ public Follow fromActivity(Activity deserialized) throws
ActivityConversionException {
--- End diff --
I don't know of any converters which have implementations to go from
Activity/ActivityObject to external network format - not because of difficulty
it just hasn't been a priority yet.
However, there are many fromActivity implementations that would be more
important that this one, since org.apache.streams.twitter.pojo.Follow is a POJO
internal to streams-provider-twitter (there is no twitter API that uses that
bean).
I will create a ticket to implement fromActivity throughout this module and
make an effort to roll that into the next release.
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