package innovimax.mixthem.operation;

public enum ZipOperation { 
  DEFAULT_ZIP_SEPARATOR("");

  private String value;

  private ZipOperation(String value) {
    this.value = value;
  }

  @Override
  public String toString() {
    return this.value;
  }

}

@@ -31,16 +31,64 @@
 ation;%0A%0A
+import innovimax.mixthem.arguments.ParamValue;%0A%0A
 public e
@@ -147,22 +147,26 @@
 private 
-String
+ParamValue
  value;%0A
@@ -222,21 +222,46 @@
 value = 
+ParamValue.createString(
 value
+)
 ;%0A  %7D%0A%0A 
@@ -296,24 +296,98 @@
 oString() %7B%0A
+    return this.value.asString();%0A  %7D%0A  %0A  public ParamValue getValue() %7B%0A
     return t

Update ZipOperation.java