chore(unit-tests): revert refactoring of EventDeserializer

Author: eldimi

powertools-serialization/src/main/java/software/amazon/lambda/powertools/utilities/EventDeserializer.java

@@ -18,16 +18,15 @@
 import com.fasterxml.jackson.databind.ObjectReader;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import software.amazon.lambda.powertools.utilities.eventpart.factory.EventPartResolver;
-import software.amazon.lambda.powertools.utilities.eventpart.factory.EventPartResolverFactory;
-import software.amazon.lambda.powertools.utilities.eventpart.resolvers.APIGatewayProxyRequestEventPartResolver;
 
 import java.io.IOException;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
+import static java.nio.charset.StandardCharsets.UTF_8;
 import static software.amazon.lambda.powertools.utilities.jmespath.Base64Function.decode;
+import static software.amazon.lambda.powertools.utilities.jmespath.Base64GZipFunction.decompress;
 
 /**
  * Class that can be used to extract the meaningful part of an event and deserialize it into a Java object.<br/>
@@ -38,16 +37,106 @@ public class EventDeserializer {
     private static final Logger LOG = LoggerFactory.getLogger(EventDeserializer.class);
 
     /**
+     * Extract the meaningful part of a Lambda Event object. Main events are built-in:
+     * <ul>
+     *     <li>{@link APIGatewayProxyRequestEvent}      -> body</li>
+     *     <li>{@link APIGatewayV2HTTPEvent}            -> body</li>
+     *     <li>{@link SNSEvent}                         -> Records[0].Sns.Message</li>
+     *     <li>{@link SQSEvent}                         -> Records[*].body <i>(list)</i></li>
+     *     <li>{@link ScheduledEvent}                   -> detail</li>
+     *     <li>{@link ApplicationLoadBalancerRequestEvent} -> body</li>
+     *     <li>{@link CloudWatchLogsEvent}              -> powertools_base64_gzip(data)</li>
+     *     <li>{@link CloudFormationCustomResourceEvent} -> resourceProperties</li>
+     *     <li>{@link KinesisEvent}                     -> Records[*].kinesis.powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link KinesisFirehoseEvent}             -> Records[*].powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link KafkaEvent}                       -> records[*].values[*].powertools_base64(value) <i>(list)</i></li>
+     *     <li>{@link ActiveMQEvent}                    -> messages[*].powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link RabbitMQEvent}                    -> rmqMessagesByQueue[*].values[*].powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link KinesisAnalyticsFirehoseInputPreprocessingEvent} -> Records[*].kinesis.powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link KinesisAnalyticsStreamsInputPreprocessingEvent} > Records[*].kinesis.powertools_base64(data) <i>(list)</i></li>
+     *     <li>{@link String}</li>
+     *     <li>{@link Map}</li>
+     * </ul>
      * To be used in conjunction with {@link EventPart#as(Class)} or {@link EventPart#asListOf(Class)}
      * for the deserialization.
      *
-     * @param event the event of your Lambda function handler method
+     * @param object the event of your Lambda function handler method
      * @return the part of the event which is meaningful (ex: body of the API Gateway).<br/>
      */
-    public static EventPart extractDataFrom(Object event) {
-            EventPartResolverFactory factory = new EventPartResolverFactory();
-            EventPartResolver generator = factory.resolveEventType(event);
-            return generator.createEventPart(event);
+    public static EventPart extractDataFrom(Object object) {
+        if (object instanceof String) {
+            return new EventPart((String) object);
+        } else if (object instanceof Map) {
+            return new EventPart((Map<String, Object>) object);
+        } else if (object instanceof APIGatewayProxyRequestEvent) {
+            APIGatewayProxyRequestEvent event = (APIGatewayProxyRequestEvent) object;
+            return new EventPart(event.getBody());
+        } else if (object instanceof APIGatewayV2HTTPEvent) {
+            APIGatewayV2HTTPEvent event = (APIGatewayV2HTTPEvent) object;
+            return new EventPart(event.getBody());
+        } else if (object instanceof SNSEvent) {
+            SNSEvent event = (SNSEvent) object;
+            return new EventPart(event.getRecords().get(0).getSNS().getMessage());
+        } else if (object instanceof SQSEvent) {
+            SQSEvent event = (SQSEvent) object;
+            return new EventPart(event.getRecords().stream()
+                    .map(SQSEvent.SQSMessage::getBody)
+                    .collect(Collectors.toList()));
+        } else if (object instanceof ScheduledEvent) {
+            ScheduledEvent event = (ScheduledEvent) object;
+            return new EventPart(event.getDetail());
+        } else if (object instanceof ApplicationLoadBalancerRequestEvent) {
+            ApplicationLoadBalancerRequestEvent event = (ApplicationLoadBalancerRequestEvent) object;
+            return new EventPart(event.getBody());
+        } else if (object instanceof CloudWatchLogsEvent) {
+            CloudWatchLogsEvent event = (CloudWatchLogsEvent) object;
+            return new EventPart(decompress(decode(event.getAwsLogs().getData().getBytes(UTF_8))));
+        } else if (object instanceof CloudFormationCustomResourceEvent) {
+            CloudFormationCustomResourceEvent event = (CloudFormationCustomResourceEvent) object;
+            return new EventPart(event.getResourceProperties());
+        } else if (object instanceof KinesisEvent) {
+            KinesisEvent event = (KinesisEvent) object;
+            return new EventPart(event.getRecords().stream()
+                    .map(r -> decode(r.getKinesis().getData()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof KinesisFirehoseEvent) {
+            KinesisFirehoseEvent event = (KinesisFirehoseEvent) object;
+            return new EventPart(event.getRecords().stream()
+                    .map(r -> decode(r.getData()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof KafkaEvent) {
+            KafkaEvent event = (KafkaEvent) object;
+            return new EventPart(event.getRecords().values().stream()
+                    .flatMap(List::stream)
+                    .map(r -> decode(r.getValue()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof ActiveMQEvent) {
+            ActiveMQEvent event = (ActiveMQEvent) object;
+            return new EventPart(event.getMessages().stream()
+                    .map(m -> decode(m.getData()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof RabbitMQEvent) {
+            RabbitMQEvent event = (RabbitMQEvent) object;
+            return new EventPart(event.getRmqMessagesByQueue().values().stream()
+                    .flatMap(List::stream)
+                    .map(r -> decode(r.getData()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof KinesisAnalyticsFirehoseInputPreprocessingEvent) {
+            KinesisAnalyticsFirehoseInputPreprocessingEvent event = (KinesisAnalyticsFirehoseInputPreprocessingEvent) object;
+            return new EventPart(event.getRecords().stream()
+                    .map(r -> decode(r.getData()))
+                    .collect(Collectors.toList()));
+        } else if (object instanceof KinesisAnalyticsStreamsInputPreprocessingEvent) {
+            KinesisAnalyticsStreamsInputPreprocessingEvent event = (KinesisAnalyticsStreamsInputPreprocessingEvent) object;
+            return new EventPart(event.getRecords().stream()
+                    .map(r -> decode(r.getData()))
+                    .collect(Collectors.toList()));
+        } else {
+            // does not really make sense to use this EventDeserializer when you already have a typed object
+            // just not to throw an exception
+            LOG.warn("Consider using your object directly instead of using EventDeserializer");
+            return new EventPart(object);
+        }
     }
 
     /**
@@ -60,19 +149,19 @@ public static class EventPart {
         private List<String> contentList;
         private Object contentObject;
 
-        public EventPart(List<String> contentList) {
+        private EventPart(List<String> contentList) {
             this.contentList = contentList;
         }
 
-        public EventPart(String content) {
+        private EventPart(String content) {
             this.content = content;
         }
 
-        public EventPart(Map<String, Object> contentMap) {
+        private EventPart(Map<String, Object> contentMap) {
             this.contentMap = contentMap;
         }
 
-        public EventPart(Object content) {
+        private EventPart(Object content) {
             this.contentObject = content;
         }