Move Account validator to separate class to allow reusing it

modules/qi-minigl/src/main/java/org/jpos/qi/minigl/AccountValidator.java

@@ -0,0 +1,44 @@
+package org.jpos.qi.minigl;
+
+import com.vaadin.data.ValidationResult;
+import com.vaadin.data.Validator;
+import com.vaadin.data.ValueContext;
+import com.vaadin.shared.ui.ErrorLevel;
+import org.jpos.ee.DB;
+import org.jpos.gl.Account;
+import org.jpos.qi.QI;
+
+public class AccountValidator implements Validator<Account> {
+    private QI app;
+    private Class clazz;
+
+    public AccountValidator (QI app, Class clazz) {
+        super();
+        this.app = app;
+        this.clazz = clazz;
+    }
+
+    @Override
+    public ValidationResult apply (Account value, ValueContext context) {
+        Account acct = null;
+        if (!context.getHasValue().isPresent())
+            return ValidationResult.ok();
+        boolean isReadOnly = context.getHasValue().get().isReadOnly();
+        if (isReadOnly)
+            return ValidationResult.ok();
+        if (value != null) {
+            try {
+                acct = DB.exec(db -> db.session().get(Account.class, value.getId()));
+            } catch (Exception e) {
+                app.getLog().createError(e.getMessage());
+            }
+        }
+        if (acct == null)
+            return ValidationResult.create(app.getMessage("errorMessage.willCreateAccountAndReceivables"),
+                    ErrorLevel.INFO);
+        else if (clazz.isInstance(value))
+            return ValidationResult.create(app.getMessage("errorMessage.accountExists"), ErrorLevel.INFO);
+        return ValidationResult.ok();
+
+    }
+}