fix: cannot copy filter values which are enum (#48)

Author: thunderz99

src/main/java/io/github/thunderz99/cosmos/condition/Condition.java

@@ -810,23 +810,23 @@ Object copyValue(Object value) {
 
 		// if value is a condition, copy the nested condition
 		if (value instanceof Condition) {
-			return ((Condition) value).copy();
-		}
+            return ((Condition) value).copy();
+        }
 
-		// if value is a collection
-		if (value instanceof Collection<?>) {
-			var coll = (Collection<?>) value;
-			return coll.stream().map(item -> copyValue(item)).collect(Collectors.toList());
-		}
+        // if value is a collection
+        if (value instanceof Collection<?>) {
+            var coll = (Collection<?>) value;
+            return coll.stream().map(item -> copyValue(item)).collect(Collectors.toList());
+        }
 
-		// primitive type
-		if (value instanceof String || Primitives.isWrapperType(value.getClass()) || value.getClass().isPrimitive()) {
-			return value;
-		}
+        // primitive type
+        if (value instanceof String || Primitives.isWrapperType(value.getClass()) || value.getClass().isPrimitive() || value.getClass().isEnum()) {
+            return value;
+        }
 
-		return JsonUtil.toMap(value);
+        return JsonUtil.toMap(value);
 
-	}
+    }
 
 	/**
 	 * fix enum exception in documentdb sdk

src/test/java/io/github/thunderz99/cosmos/condition/ConditionTest.java

@@ -722,16 +722,32 @@ public void copy_should_work_for_rawsql() {
             for (var param : params) {
                 assertThat(param.getName()).startsWith("@param0");
                 if (param.getName().endsWith("01")) {
-					assertThat(param.getValue(String.class)).isEqualTo("Tom");
-				} else {
-					assertThat(param.getValue(Integer.class)).isEqualTo(20);
-				}
-			}
-		}
-	}
+                    assertThat(param.getValue(String.class)).isEqualTo("Tom");
+                } else {
+                    assertThat(param.getValue(Integer.class)).isEqualTo(20);
+                }
+            }
+        }
+    }
 
-	@Test
-	public void buildQuerySpec_should_work_for_is_defined() {
+    public enum Status {
+        enrolled, suspended, retired
+    }
+
+
+    @Test
+    public void copy_should_work_for_enum() {
+
+        var cond = Condition.filter("id", "ID001", "status", Status.enrolled);
+
+        var copy = cond.copy();
+        assertThat(copy.filter.get("id")).isEqualTo("ID001");
+        assertThat(copy.filter.get("status")).isEqualTo(Status.enrolled);
+
+    }
+
+    @Test
+    public void buildQuerySpec_should_work_for_is_defined() {
 
         var q = Condition.filter("id", "Hanks", //
                 "age IS_DEFINED", true) //