version 1.1.2: add new apis to JsonHandler

build.gradle

 group 'com.ipgallery.common'
-version '1.1.1'
+version '1.1.2'
 
 apply plugin: 'java'
 apply plugin: 'maven-publish'

src/main/java/common/JsonHandler.java

 package common;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.ObjectReader;
-import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.*;
+
+import java.io.File;
+import java.io.IOException;
 
 public class JsonHandler {
 	
@@ -127,7 +127,30 @@ public class JsonHandler {
 		}
 		return null;
 	}
-	
+
+	/**
+	 * Use to serialize jsonNode to the class referenced by TypeReference
+	 * @param jsonNode - the json node to serialize
+	 * @param type - typeReference of the object
+     * @return  * Object of the requested type, or null for failure
+     */
+	public static Object getNodeAsObject(JsonNode jsonNode, TypeReference<?> type) {
+		ObjectReader objectReader = SORTED_MAPPER.reader(type);
+		if(jsonNode != null && !jsonNode.isNull() && !jsonNode.isMissingNode() && objectReader != null) {
+			try {
+				return objectReader.readValue(jsonNode);
+			} catch (Exception var4) {
+				var4.printStackTrace();
+			}
+		}
+		else
+			return null;
+		return null;
+	}
+
+
+
+
 	public static JsonNode getJsonNodeFromObject(Object obj){
 		JsonNode node = null;
 	
@@ -148,5 +171,60 @@ public class JsonHandler {
 
 		}
 		return node;
-	}	
+	}
+
+	/**
+	 * use to serialize a json file indicated by it's location in the file system
+	 * @param strFile - file location in file system
+	 * @return object of type JsonNode, or null for failure
+     */
+	public static JsonNode readJsonNodeFromFile(String strFile) {
+		File file=new File(strFile);
+		JsonNode jsonNode = null;
+		try {
+			jsonNode = SORTED_MAPPER.readTree(file);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return jsonNode;
+
+	}
+
+
+	/**
+	 * Use to serialize jsonNode to object of given JavaType
+	 * @param jsonNode - the json node to serialize
+	 * @param javaType - type of the object
+     * @return Object of the requested type, or null for failure
+     */
+	public static Object getNodeAsObject(JsonNode jsonNode, JavaType javaType) {
+		ObjectReader objectReader = SORTED_MAPPER.reader(javaType);
+		if(jsonNode != null && !jsonNode.isNull() && !jsonNode.isMissingNode() && objectReader != null) {
+			try {
+				return objectReader.readValue(jsonNode);
+			} catch (Exception var4) {
+				var4.printStackTrace();
+			}
+		}
+		else
+			return null;
+		return null;
+	}
+
+
+
+	/**
+	 * Use to serialize jsonNode to generic class object.
+	 * for example: public class MyClass<T>. the @param outer parameter is for MyClass.class
+	 * and the inner is for the actual class of T.
+	 *
+	 * @param jsonNode - the json node to serialize
+	 * @param outer - the class of the generic class
+	 * @param inner - the actual class of the
+     * @return Object of the requested type, or null for failure
+     */
+	public static Object getNodeAsParametricTypeObject(JsonNode jsonNode, Class<?> outer, Class<?> inner) {
+		JavaType javaType = SORTED_MAPPER.getTypeFactory().constructParametricType(outer, inner);
+		return getNodeAsObject(jsonNode, javaType);
+	}
 }