Github user robdouglas commented on a diff in the pull request:
https://github.com/apache/incubator-streams/pull/131#discussion_r20442870
--- Diff:
streams-components/streams-converters/src/main/java/org/apache/streams/converter/ActivityConverterProcessor.java
---
@@ -0,0 +1,167 @@
+/*
+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
+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 org.apache.streams.converter;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
+import org.apache.streams.core.StreamsDatum;
+import org.apache.streams.data.ActivityConverter;
+import org.apache.streams.data.ActivityConverterFactory;
+import org.apache.streams.data.ActivityConverterResolver;
+import org.apache.streams.data.DocumentClassifier;
+import org.apache.streams.pojo.json.Activity;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+/**
+ * ActivityConverterProcessor is a utility processor for converting any
datum document
+ * to an Activity.
+ *
+ * By default it will handle string json and objectnode representation of
existing Activities.
+ *
+ * Implementations can add DocumentClassifiers and
ActivityConverterResolvers to the processor
+ * to ensure additional ActivityConverters will be resolved and applied.
+ *
+ * A DocumentClassifier's reponsibility is to recognize document formats
and label them, using
+ * a jackson-compatible POJO class.
+ *
+ * An ActivityConverterResolver's reponsibility is to identify
ActivityConverter implementations
+ * capable of converting a raw document associated with that POJO class
into an activity.
+ *
+ */
+public class ActivityConverterProcessor extends TypeConverterProcessor {
+
+ private final static Logger LOGGER =
LoggerFactory.getLogger(ActivityConverterProcessor.class);
+
+ protected ActivityConverterProcessorConfiguration configuration;
+
+ private List<DocumentClassifier> classifiers;
+ private List<ActivityConverterResolver> resolvers;
+
+ public ActivityConverterProcessor() {
+ super(Activity.class);
+ this.classifiers = Lists.newArrayList();
+ this.resolvers = Lists.newArrayList();
+ }
+
+ public
ActivityConverterProcessor(ActivityConverterProcessorConfiguration
configuration) {
+ super(Activity.class);
+ this.configuration = configuration;
+ this.classifiers = Lists.newArrayList();
+ this.resolvers = Lists.newArrayList();
+ }
+
+ @Override
+ public List<StreamsDatum> process(StreamsDatum entry) {
+
+ Preconditions.checkArgument(classifiers.size() > 0);
+ Preconditions.checkArgument(resolvers.size() > 0);
+
+ List<StreamsDatum> result = Lists.newLinkedList();
+ Object inDoc = entry.getDocument();
+
+ try {
+
+ // This implementation is primitive, greedy, takes first it
can resolve
+ Class datumClass = null;
+ for( DocumentClassifier classifier : classifiers ) {
+ datumClass = classifier.detectClass(inDoc);
+ if( classifier != null )
--- End diff --
Won't this break out of the loop on the first classifier, every time?
Should this line be: if(datumClass != null)?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
