[JAVA-22] Moved articles not in ebook from spring-boot-rest to spring-boot-mvc-2

spring-boot-modules/spring-boot-mvc-2/src/test/java/com/baeldung/mime/JacksonMarshaller.java

@@ -0,0 +1,75 @@
+package com.baeldung.mime;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.MediaType;
+
+import com.baeldung.etag.Foo;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public final class JacksonMarshaller implements IMarshaller {
+    private final Logger logger = LoggerFactory.getLogger(JacksonMarshaller.class);
+
+    private final ObjectMapper objectMapper;
+
+    public JacksonMarshaller() {
+        super();
+
+        objectMapper = new ObjectMapper();
+    }
+
+    // API
+
+    @Override
+    public final <T> String encode(final T resource) {
+        String entityAsJSON = null;
+        try {
+            entityAsJSON = objectMapper.writeValueAsString(resource);
+        } catch (final IOException ioEx) {
+            logger.error("", ioEx);
+        }
+
+        return entityAsJSON;
+    }
+
+    @Override
+    public final <T> T decode(final String resourceAsString, final Class<T> clazz) {
+        T entity = null;
+        try {
+            entity = objectMapper.readValue(resourceAsString, clazz);
+        } catch (final IOException ioEx) {
+            logger.error("", ioEx);
+        }
+
+        return entity;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public final <T> List<T> decodeList(final String resourcesAsString, final Class<T> clazz) {
+        List<T> entities = null;
+        try {
+            if (clazz.equals(Foo.class)) {
+                entities = objectMapper.readValue(resourcesAsString, new TypeReference<List<T>>() {
+                    // ...
+                });
+            } else {
+                entities = objectMapper.readValue(resourcesAsString, List.class);
+            }
+        } catch (final IOException ioEx) {
+            logger.error("", ioEx);
+        }
+
+        return entities;
+    }
+
+    @Override
+    public final String getMime() {
+        return MediaType.APPLICATION_JSON.toString();
+    }
+
+}