Config Parsing and Validation

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.yahoo.bullet</groupId>
     <artifactId>bullet-core</artifactId>
-    <version>0.2.6-SNAPSHOT</version>
+    <version>0.3.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>bullet-core</name>
 
@@ -193,7 +193,7 @@
 
             <plugin>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.9.1</version>
+                <version>2.10.4</version>
                 <configuration>
                     <sourcepath>${project.basedir}/src/main/java</sourcepath>
                 </configuration>

src/main/java/com/yahoo/bullet/Config.java

@@ -5,6 +5,8 @@
  */
 package com.yahoo.bullet;
 
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import lombok.extern.slf4j.Slf4j;
 import org.jvyaml.YAML;
 
@@ -24,7 +26,9 @@
 @Slf4j
 public class Config implements Serializable {
     private Map<String, Object> data;
+
     public static final String DELIMITER = ".";
+    private static Gson GSON = new GsonBuilder().serializeNulls().setPrettyPrinting().disableHtmlEscaping().create();
 
     /**
      * Constructor that loads a specific file and loads the settings in that file.
@@ -33,7 +37,6 @@ public class Config implements Serializable {
      */
     public Config(String file) {
         data = readYAML(file);
-        log.info("Final Configuration:\n{} ", data);
     }
 
     /**
@@ -47,7 +50,6 @@ public Config(String file, String defaultConfigurationFile) {
         // Override
         Map<String, Object> specificConf = readYAML(file);
         data.putAll(specificConf);
-        log.info("Final Configuration with defaults:\n{} ", data);
     }
 
     /**
@@ -207,4 +209,9 @@ protected Map<String, Object> readYAML(String yamlFile) {
             return new HashMap<>();
         }
     }
+
+    @Override
+    public String toString() {
+        return GSON.toJson(data);
+    }
 }

src/main/java/com/yahoo/bullet/Utilities.java

@@ -10,9 +10,27 @@
 import java.util.Map;
 
 public class Utilities {
+   /**
+    * Tries to get the object casted as the target type. If it is generic, the captured types cannot not be
+    * validated. Only the base object type is validated.
+    *
+    * @param entry The object to cast.
+    * @param clazz The class of the U.
+    * @param <U> The type to get the object as.
+    * @return The casted object of type U or null if the cast could not be done.
+    */
+    @SuppressWarnings("unchecked")
+    public static <U> U getCasted(Object entry, Class<U> clazz) {
+        try {
+            return clazz.cast(entry);
+        } catch (ClassCastException ignored) {
+        }
+        return null;
+    }
+
     /**
-     * Tries to get a key from a map as the target type. If it is a composite type, the internal types are not
-     * validated. Only the outermost object type is validated.
+     * Tries to get a key from a map as the target type. If it is a generic type, the captured types are not
+     * validated. Only the base object type is validated.
      *
      * @param map  The non-null map that possibly contains the key.
      * @param key  The String key to get the value for from the map.
@@ -23,11 +41,7 @@ public class Utilities {
      */
     @SuppressWarnings("unchecked")
     public static <U> U getCasted(Map<String, Object> map, String key, Class<U> clazz) {
-        try {
-            return clazz.cast(map.get(key));
-        } catch (ClassCastException ignored) {
-        }
-        return null;
+        return getCasted(map.get(key), clazz);
     }
 
     /**