Add support for serialization to enable persisting request parameters.

Author: nitzanj

cloudinary-core/src/main/java/com/cloudinary/Coordinates.java

@@ -1,12 +1,13 @@
 package com.cloudinary;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
 
 import com.cloudinary.utils.Rectangle;
 import com.cloudinary.utils.StringUtils;
 
-public class Coordinates {
+public class Coordinates implements Serializable{
 
     Collection<Rectangle> coordinates = new ArrayList<Rectangle>();
 

cloudinary-core/src/main/java/com/cloudinary/Transformation.java

@@ -1,5 +1,6 @@
 package com.cloudinary;
 
+import java.io.Serializable;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -11,7 +12,7 @@
 import com.cloudinary.utils.StringUtils;
 
 @SuppressWarnings({"rawtypes", "unchecked"})
-public class Transformation {
+public class Transformation implements Serializable{
     public static final String VAR_NAME_RE = "^\\$[a-zA-Z][a-zA-Z0-9]+$";
     protected Map transformation;
     protected List<Map> transformations;

cloudinary-core/src/main/java/com/cloudinary/transformation/AbstractLayer.java

@@ -1,10 +1,11 @@
 package com.cloudinary.transformation;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 
 import com.cloudinary.utils.StringUtils;
 
-public abstract class AbstractLayer<T extends AbstractLayer<T>> {
+public abstract class AbstractLayer<T extends AbstractLayer<T>> implements Serializable{
     abstract T getThis();
 
     protected String resourceType = null;

cloudinary-core/src/main/java/com/cloudinary/utils/ObjectUtils.java

@@ -1,18 +1,12 @@
 package com.cloudinary.utils;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-
 import org.cloudinary.json.JSONArray;
 import org.cloudinary.json.JSONException;
 import org.cloudinary.json.JSONObject;
 
+import java.io.*;
+import java.util.*;
+
 
 public class ObjectUtils {
 
@@ -32,6 +26,22 @@ public static String asString(Object value, String defaultValue) {
         }
     }
 
+    public static String serialize(Object object) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream objectOutputStream = new ObjectOutputStream(baos);
+        try {
+            objectOutputStream.writeObject(object);
+            return new String(Base64Coder.encode(baos.toByteArray()));
+        } finally {
+            objectOutputStream.close();
+        }
+    }
+
+    public static Object deserialize(String base64SerializedString) throws IOException, ClassNotFoundException {
+        byte[] buf = Base64Coder.decode(base64SerializedString);
+        return new ObjectInputStream(new ByteArrayInputStream(buf)).readObject();
+    }
+
     @SuppressWarnings({"rawtypes", "unchecked"})
     public static List asArray(Object value) {
         if (value == null) {

cloudinary-core/src/main/java/com/cloudinary/utils/Rectangle.java

@@ -1,6 +1,8 @@
 package com.cloudinary.utils;
 
-public class Rectangle {
+import java.io.Serializable;
+
+public class Rectangle implements Serializable{
 
     public int height;
     public int width;

cloudinary-core/src/main/java/org/cloudinary/json/JSONArray.java

@@ -25,6 +25,7 @@ of this software and associated documentation files (the "Software"), to deal
  */
 
 import java.io.IOException;
+import java.io.Serializable;
 import java.io.StringWriter;
 import java.io.Writer;
 import java.lang.reflect.Array;
@@ -77,7 +78,7 @@ of this software and associated documentation files (the "Software"), to deal
  * @author JSON.org
  * @version 2014-05-03
  */
-public class JSONArray {
+public class JSONArray implements Serializable {
 
     /**
      * The arrayList where the JSONArray's properties are kept.

cloudinary-core/src/main/java/org/cloudinary/json/JSONObject.java

@@ -25,6 +25,7 @@ of this software and associated documentation files (the "Software"), to deal
  */
 
 import java.io.IOException;
+import java.io.Serializable;
 import java.io.StringWriter;
 import java.io.Writer;
 import java.lang.reflect.Field;
@@ -93,7 +94,7 @@ of this software and associated documentation files (the "Software"), to deal
  * @author JSON.org
  * @version 2014-05-03
  */
-public class JSONObject {
+public class JSONObject implements Serializable{
     /**
      * JSONObject.NULL is equivalent to the value that JavaScript calls null,
      * whilst Java's null is equivalent to the value that JavaScript calls