added extension ObjectMapKvSourceRecordMapper

Author: leonasa

kafka-connect-http/src/main/java/com/github/castorm/kafka/connect/http/record/ObjectMapKvSourceRecordMapper.java

@@ -0,0 +1,91 @@
+package com.github.castorm.kafka.connect.http.record;
+
+/*-
+ * #%L
+ * Kafka Connect HTTP
+ * %%
+ * Copyright (C) 2020 - 2024 Cástor Rodríguez
+ * %%
+ * Licensed 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.
+ * #L%
+ */
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.castorm.kafka.connect.http.model.Offset;
+import com.github.castorm.kafka.connect.http.record.model.KvRecord;
+import com.github.castorm.kafka.connect.http.record.spi.KvSourceRecordMapper;
+import lombok.RequiredArgsConstructor;
+import org.apache.kafka.connect.source.SourceRecord;
+
+import java.time.Instant;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+import static java.util.Collections.emptyMap;
+
+@RequiredArgsConstructor
+public class ObjectMapKvSourceRecordMapper implements KvSourceRecordMapper {
+
+    private static final String KEY_FIELD_NAME = "key";
+    private static final String TIMESTAMP_FIELD_NAME = "timestamp";
+
+    private static Map<String, ?> sourcePartition = emptyMap();
+
+    private final Function<Map<String, ?>, SourceRecordMapperConfig> configFactory;
+
+    private SourceRecordMapperConfig config;
+
+    // Jackson ObjectMapper for deserialization
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
+    public ObjectMapKvSourceRecordMapper() {
+        this(SourceRecordMapperConfig::new);
+    }
+
+    @Override
+    public void configure(Map<String, ?> settings) {
+        config = configFactory.apply(settings);
+    }
+
+    @Override
+    public SourceRecord map(KvRecord record) {
+
+        Offset offset = record.getOffset();
+        Long timestamp = offset.getTimestamp().map(Instant::toEpochMilli).orElseGet(System::currentTimeMillis);
+
+        String key = record.getKey();
+
+        Map<String, Object> deserializedValue;
+        try {
+            deserializedValue = objectMapper.readValue(record.getValue().toString(), new TypeReference<Map<String, Object>>() {});
+        } catch (Exception e) {
+            throw new RuntimeException("Failed to deserialize record value", e);
+        }
+
+        deserializedValue.put(KEY_FIELD_NAME, key);
+        deserializedValue.put(TIMESTAMP_FIELD_NAME, timestamp);
+
+        return new SourceRecord(
+                sourcePartition,
+                offset.toMap(),
+                config.getTopic(),
+                null,
+                null,
+                key,
+                null,
+                deserializedValue,
+                timestamp);
+    }
+}