From 7d24cc8fe5b1b1a2e07d53b7a52dd2bda325ce88 Mon Sep 17 00:00:00 2001
From: Robert Sehr <robert.sehr@intranda.com>
Date: Mon, 2 Dec 2024 14:23:43 +0100
Subject: [PATCH] check if a value exists

---
 .../plugins/checks/TifValidationSimpleXpathCheck.java     | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/module-base/src/main/java/de/intranda/goobi/plugins/checks/TifValidationSimpleXpathCheck.java b/module-base/src/main/java/de/intranda/goobi/plugins/checks/TifValidationSimpleXpathCheck.java
index 6979136..54e65d1 100644
--- a/module-base/src/main/java/de/intranda/goobi/plugins/checks/TifValidationSimpleXpathCheck.java
+++ b/module-base/src/main/java/de/intranda/goobi/plugins/checks/TifValidationSimpleXpathCheck.java
@@ -27,6 +27,7 @@ public class TifValidationSimpleXpathCheck implements TifValidationCheck {
     private String errorMessage;
     private Map<String, String> replaceMap;
 
+    // possible values: equals, greater, lesser, exists, not exists, same
     private String checkType = "equals";
 
     public TifValidationSimpleXpathCheck(Set<Namespace> namespaces, String xpath, String expectedValue, String errorMessage) {
@@ -54,6 +55,10 @@ private void createReplaceMap() {
     @Override
     public boolean check(Document doc) {
         Object value = xpath.evaluateFirst(doc);
+        if (value == null) {
+            return "not exists".equals(checkType);
+        }
+
         if (value instanceof Element e) {
             value = e.getTextTrim();
         } else if (value instanceof Attribute a) {
@@ -66,6 +71,9 @@ public boolean check(Document doc) {
         this.replaceMap.put("found", (String) value);
 
         switch (checkType) {
+            case "exists":
+                return true;
+
             case "equals": {
                 return this.expectedValue.equals(value) || (value instanceof String s && s.matches(this.expectedValue));
             }