diff --git a/AlgebraicDataflowArchitectureModel/src/algorithms/JerseyMethodBodyGenerator.java b/AlgebraicDataflowArchitectureModel/src/algorithms/JerseyMethodBodyGenerator.java
index 9b976f4..e0f426e 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithms/JerseyMethodBodyGenerator.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithms/JerseyMethodBodyGenerator.java
@@ -45,19 +45,10 @@
 		Symbol sum = model.getSymbol("sum");
 		Symbol.Memento sumMem = null;
 		if (sum != null) {
-			// for the list of strings.
 			sumMem = sum.createMemento();
-			sum.setImplName("stream().mapToInt(x->Integer.parseInt(x)).sum");
+			sum.setImplName("stream().mapToInt(x->x).sum");
 			sum.setImplOperatorType(Symbol.Type.METHOD);
 		}
-		Symbol cons = model.getSymbol("cons");
-		Symbol.Memento consMem = null;
-		if (cons != null) {
-			// for the list of strings.
-			consMem = cons.createMemento();
-			cons.setImplName("($x,$y)->$x.add(Integer.toString($y))");
-			cons.setImplOperatorType(Symbol.Type.LAMBDA_WITH_SIDE_EFFECT);
-		}
 
 		// Create a map from type names (lower case) to their types.
 		Map<String, TypeDeclaration> typeMap = new HashMap<>();
@@ -188,16 +179,18 @@
 		
 		if (floor != null) floor.setMemento(floorMem);
 		if (sum != null) sum.setMemento(sumMem);
-		if (cons != null) cons.setMemento(consMem);
 		return codes;
 	}
 
 	private static String getHttpMethodParamsStatement(String callerResourceName, Type paramType, String paramName) {
 		if (paramType.getTypeName().equals("List")) {
-			String statements = "MultivaluedHashMap list = new MultivaluedHashMap();\n";
-			statements += "list.addAll(\"" + paramName + "\", "+ paramName + ");\n";
-			statements += "Entity<Form> entity = Entity.entity(new Form(list), MediaType.APPLICATION_FORM_URLENCODED);";
+			String statements = "Form form = new Form();\n";
+			statements += "for (Integer i: " + paramName + ") {\n";
+			statements += "\tform.param(\"" + paramName + "\", i.toString());\n";
+			statements += "}\n";
+			statements += "Entity<Form> entity = Entity.entity(form, MediaType.APPLICATION_FORM_URLENCODED);";
 			return statements;
+//			return "Entity<String> entity = Entity.entity(" + paramName + ".toString(), MediaType.APPLICATION_JSON);";
 		}
 		return "Entity<Form> entity = Entity.entity(new Form().param(\"" + paramName + "\", " + CodeUtil.getToStringExp(paramType.getImplementationTypeName(), paramName) + "), MediaType.APPLICATION_FORM_URLENCODED_TYPE);";
 	}
diff --git a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/JerseyPrototypeGenerateAction.java b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/JerseyPrototypeGenerateAction.java
index 2ac5444..1bf0de2 100644
--- a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/JerseyPrototypeGenerateAction.java
+++ b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/JerseyPrototypeGenerateAction.java
@@ -50,16 +50,6 @@
 			} else {
 				JerseyCodeGenerator.resetMainTypeName();			// use the default main type's name.
 			}
-			
-			Type list = model.getType("List");
-			Type.Memento listMem = null;
-			if (list != null) {
-				// Only a list of strings can be passed as a form parameter of PUT/POST method.
-				listMem = list.createMemento();
-				list.setImplementationTypeName("ArrayList<String>");
-				list.setInterfaceTypeName("List<String>");
-			}
-			
 			editor.setCodes(JerseyMethodBodyGenerator.doGenerate(graph, model, JerseyCodeGenerator.doGenerate(graph, model)));
 			for (CompilationUnit file : editor.getCodes()) {
 				System.out.println(file);
@@ -75,8 +65,6 @@
 					save(fc.getSelectedFile(), cu);
 				}
 			}
-			
-			if (list != null) list.setMemento(listMem);
 		}
 	}
 
diff --git a/AlgebraicDataflowArchitectureModel/src/models/dataConstraintModel/DataConstraintModel.java b/AlgebraicDataflowArchitectureModel/src/models/dataConstraintModel/DataConstraintModel.java
index 1089b4d..fff1ccc 100644
--- a/AlgebraicDataflowArchitectureModel/src/models/dataConstraintModel/DataConstraintModel.java
+++ b/AlgebraicDataflowArchitectureModel/src/models/dataConstraintModel/DataConstraintModel.java
@@ -28,7 +28,7 @@
 	public static final Symbol cons = new Symbol("cons", 2, Symbol.Type.PREFIX, "add", Symbol.Type.METHOD_WITH_SIDE_EFFECT, new int[] {1, 0});
 	public static final Symbol head = new Symbol("head", 1, Symbol.Type.PREFIX, "get(0)", Symbol.Type.METHOD);
 	public static final Symbol body = new Symbol("tail", 1, Symbol.Type.PREFIX, "($x)->$x.subString(1, $x.size())", Symbol.Type.LAMBDA);
-	public static final Symbol cond = new Symbol("if", 3, Symbol.Type.PREFIX, "($x,$y,$z)->$x?$y:$z", Symbol.Type.LAMBDA);
+	public static final Symbol cond = new Symbol("if", 3, Symbol.Type.PREFIX, "($x,$y,$z)->$x ? $y : $z", Symbol.Type.LAMBDA);
 	public static final Symbol eq = new Symbol("eq", 2, Symbol.Type.PREFIX, "==", Symbol.Type.INFIX);
 	public static final Symbol gt = new Symbol("gt", 2, Symbol.Type.PREFIX, ">", Symbol.Type.INFIX);
 	public static final Symbol lt = new Symbol("lt", 2, Symbol.Type.PREFIX, "<", Symbol.Type.INFIX);