Added null value handling for rules

Author: ditschedev

src/main/java/dev/ditsche/validator/ruleset/AlphaNumericRule.java

@@ -15,6 +15,8 @@ public class AlphaNumericRule implements Rule {
 
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
         if(!(value instanceof String))
             return false;
         return Pattern.matches(pattern, String.valueOf(value));

src/main/java/dev/ditsche/validator/ruleset/EmailRule.java

@@ -13,6 +13,8 @@
 public class EmailRule implements Rule {
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
 
         if(!(value instanceof String))
             return false;

src/main/java/dev/ditsche/validator/ruleset/MaxRule.java

@@ -15,6 +15,8 @@ public class MaxRule implements Rule {
 
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
         if(value instanceof String)
             return ((String) value).length() <= max;
 

src/main/java/dev/ditsche/validator/ruleset/MinRule.java

@@ -15,6 +15,8 @@ public class MinRule implements Rule {
 
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
         if(value instanceof String)
             return ((String) value).length() >= min;
 

src/main/java/dev/ditsche/validator/ruleset/PatternRule.java

@@ -17,6 +17,8 @@ public class PatternRule implements Rule {
 
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
 
         if(!(value instanceof String))
             return false;

src/main/java/dev/ditsche/validator/ruleset/SizeRule.java

@@ -27,6 +27,8 @@ public class SizeRule implements Rule {
 
     @Override
     public boolean passes(Object value) {
+        if(value == null)
+            return false;
         if(value instanceof String)
             return ((String) value).length() >= min && ((String) value).length() <= max;