Add a ProviderValidators for custom the behaviour of Custom Validators dynamically

Author: GiskardB

README.md

@@ -482,7 +482,7 @@ class JavascriptFormatValidator implements FormatValidator {
         try {
             Boolean result = (Boolean) javaScriptEngine.eval(script);
             if (!result) {
-                return Optional.of(String.format("the length of string [%s] is greater than 5", subject));
+                return Optional.of(String.format("the length of string [%s] is not equal 5", subject));
             }
         } catch (ScriptException e) {
             e.printStackTrace();

core/src/test/java/org/everit/json/schema/loader/SchemaLoaderTest.java

@@ -851,7 +851,7 @@ public Optional<String> validate(String subject) {
             try {
                 Boolean result = (Boolean) javaScriptEngine.eval(script);
                 if (!result) {
-                    return Optional.of(String.format("the length of string [%s] is greater than 5", subject));
+                    return Optional.of(String.format("the length of string [%s] is  not equal 5", subject));
                 }
             } catch (ScriptException e) {
                 e.printStackTrace();