Implementing IF-THEN-ELSE Conditional (Draft 7)

Author: Anderson Ferreira

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

@@ -145,13 +145,13 @@ private Map<String, JsonValidator> read(JsonNode schemaNode) {
         Iterator<String> pnames = schemaNode.fieldNames();
         while (pnames.hasNext()) {
             String pname = pnames.next();
-            JsonNode n = schemaNode.get(pname);
+            JsonNode nodeToUse = pname.equals("if") ? schemaNode : schemaNode.get(pname);
 
-            JsonValidator validator = validationContext.newValidator(getSchemaPath(), pname, n, this);
+            JsonValidator validator = validationContext.newValidator(getSchemaPath(), pname, nodeToUse, this);
             if (validator != null) {
                 validators.put(getSchemaPath() + "/" + pname, validator);
 
-                if(pname.equals("required"))
+                if (pname.equals("required"))
                 	requiredValidator = validator;
             }
 

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

@@ -65,7 +65,8 @@ public JsonValidator newValidator(String schemaPath, JsonNode schemaNode, JsonSc
     UNIQUE_ITEMS("uniqueItems", "1031", new MessageFormat("{0}: the items in the array must be unique"), UniqueItemsValidator.class),
     DATETIME("date-time", "1034", new MessageFormat("{0}: {1} is an invalid {2}"), null),
     UUID("uuid", "1035", new MessageFormat("{0}: {1} is an invalid {2}"), null),
-    ID("id", "1036", new MessageFormat("{0}: {1} is an invalid segment for URI {2}"), null);
+    ID("id", "1036", new MessageFormat("{0}: {1} is an invalid segment for URI {2}"), null),
+    IF_THEN_ELSE("if", "1037", null, IfValidator.class);
 
     private static Map<String, ValidatorTypeCode> constants = new HashMap<String, ValidatorTypeCode>();
 

src/test/java/com/networknt/schema/JsonSchemaTest.java

@@ -320,13 +320,16 @@ public void testSchemaFromClasspath() throws Exception {
         runTestFile("tests/classpath/schema.json");
     }
 
-
-
     @Test
     public void testUUIDValidator() throws Exception {
         runTestFile("tests/uuid.json");
     }
 
+    @Test
+    public void testIfValidator() throws Exception {
+        runTestFile("tests/if.json");
+    }
+
     /**
      * Although, the data file has three errors, but only on is reported
      */