Add CoherentConfigValidator

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/Config.java

@@ -36,6 +36,8 @@ public class Config {
     private Pattern includePattern;
     private boolean safeMode;
 
+    private Integer coherent;
+
     private Set<String> forcedKeywords = new HashSet<>(Arrays.asList("forced", "signs", "songs"));
     private Set<String> commentaryKeywords = new HashSet<>(Arrays.asList("commentary", "director"));
     private Set<String> excludedDirectories = new HashSet<>();

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/CoherentConfigValidator.java

@@ -0,0 +1,22 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validator;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.ConfigProperty;
+import org.apache.commons.lang3.math.NumberUtils;
+
+public class CoherentConfigValidator extends ConfigValidator<Integer> {
+    private static final Integer DISABLED = -1;
+
+    public CoherentConfigValidator(ConfigProperty property, boolean required) {
+        super(property, required, null);
+    }
+
+    @Override
+    Integer parse(String value) {
+        return NumberUtils.isParsable(value) ? Integer.parseInt(value) : DISABLED;
+    }
+
+    @Override
+    boolean isValid(Integer result) {
+        return result > 0;
+    }
+}