Make date-time validation align with RFC3339 (networknt#508) (networknt#521)

Co-authored-by: Matti Hansson <[email protected]>

Author: aznan2

src/main/java/com/networknt/schema/DateTimeValidator.java

@@ -40,8 +40,8 @@ public class DateTimeValidator extends BaseJsonValidator implements JsonValidato
 
     private static final Pattern RFC3339_PATTERN = Pattern.compile(
             "^(\\d{4})-(\\d{2})-(\\d{2})" // yyyy-MM-dd
-                    + "([Tt](\\d{2}):(\\d{2}):(\\d{2})(\\.\\d+)?)?" // 'T'HH:mm:ss.milliseconds
-                    + "([Zz]|([+-])(\\d{2}):?(\\d{2}))?");
+                    + "([Tt](\\d{2}):(\\d{2}):(\\d{2})(\\.\\d+)?" // 'T'HH:mm:ss.milliseconds
+                    + "(([Zz])|([+-])(\\d{2}):(\\d{2})))?");
 
     public DateTimeValidator(String schemaPath, JsonNode schemaNode, JsonSchema parentSchema, ValidationContext validationContext, String formatName) {
         super(schemaPath, schemaNode, parentSchema, ValidatorTypeCode.DATETIME, validationContext);
@@ -82,12 +82,12 @@ private boolean isLegalDateTime(String string) {
         pattern.append("yyyy-MM-dd");
 
         boolean isTimeGiven = matcher.group(4) != null;
-        String timeZoneShiftRegexGroup = matcher.group(9);
-        boolean isTimeZoneShiftGiven = timeZoneShiftRegexGroup != null;
+        boolean isOffsetZuluTime = matcher.group(10) != null;
         String hour = null;
         String minute = null;
         String second = null;
         String milliseconds = null;
+        String timeShiftSign = null;
         String timeShiftHour = null;
         String timeShiftMinute = null;
 
@@ -96,12 +96,6 @@ private boolean isLegalDateTime(String string) {
             return false;
         }
 
-        if (!isTimeGiven && isTimeZoneShiftGiven) {
-            logger.error("Invalid date/time format, cannot specify time zone shift" +
-                    " without specifying time: " + string);
-            return false;
-        }
-
         if (isTimeGiven) {
             hour = matcher.group(5);
             minute = matcher.group(6);
@@ -121,16 +115,15 @@ private boolean isLegalDateTime(String string) {
                 dateTime.append(milliseconds);
                 pattern.append(".SSS");
             }
-        }
 
-        if (isTimeGiven && isTimeZoneShiftGiven) {
-            if (Character.toUpperCase(timeZoneShiftRegexGroup.charAt(0)) == 'Z') {
+            if (isOffsetZuluTime) {
                 dateTime.append('Z');
                 pattern.append("'Z'");
             } else {
-                timeShiftHour = matcher.group(11);
-                timeShiftMinute = matcher.group(12);
-                dateTime.append(matcher.group(10).charAt(0)).append(timeShiftHour).append(':').append(timeShiftMinute);
+                timeShiftSign = matcher.group(11);
+                timeShiftHour = matcher.group(12);
+                timeShiftMinute = matcher.group(13);
+                dateTime.append(timeShiftSign).append(timeShiftHour).append(':').append(timeShiftMinute);
                 pattern.append("XXX");
             }
         }

src/test/resources/draft2019-09/optional/format/date-time.json

@@ -49,6 +49,21 @@
         "description": "only RFC3339 not all of ISO 8601 are valid",
         "data": "2013-350T01:01:01",
         "valid": false
+      },
+      {
+        "description": "an invalid date-time string without offset",
+        "data": "1963-06-19T08:30:06",
+        "valid": false
+      },
+      {
+        "description": "an invalid date-time string with only hours in offset",
+        "data": "1963-06-19T08:30:06+02",
+        "valid": false
+      },
+      {
+        "description": "an invalid date-time string without colon in offset",
+        "data": "1963-06-19T08:30:06+0200",
+        "valid": false
       }
     ]
   }

src/test/resources/draft4/optional/format.json

@@ -11,9 +11,9 @@
         "valid": true
       },
       {
-        "description": "a valid date-time string without colon",
+        "description": "an invalid date-time string without colon",
         "data": "2018-07-27T00:00:01.000-0300",
-        "valid": true
+        "valid": false
       },
       {
         "description": "a valid date-time string",
@@ -56,14 +56,14 @@
         "valid": true
       },
       {
-        "description": "an valid date-time string",
+        "description": "an invalid date-time string",
         "data": "1963-12-30T08:30:06.283",
-        "valid": true
+        "valid": false
       },
       {
-        "description": "an valid date-time string",
+        "description": "an invalid date-time string",
         "data": "1963-12-30T08:30:06",
-        "valid": true
+        "valid": false
       },
       {
         "description": "an valid date-time string",

src/test/resources/draft7/optional/format/date-time.json

@@ -49,6 +49,21 @@
         "description": "only RFC3339 not all of ISO 8601 are valid",
         "data": "2013-350T01:01:01",
         "valid": false
+      },
+      {
+        "description": "an invalid date-time string without offset",
+        "data": "1963-06-19T08:30:06",
+        "valid": false
+      },
+      {
+        "description": "an invalid date-time string with only hours in offset",
+        "data": "1963-06-19T08:30:06+02",
+        "valid": false
+      },
+      {
+        "description": "an invalid date-time string without colon in offset",
+        "data": "1963-06-19T08:30:06+0200",
+        "valid": false
       }
     ]
   }