We don't have neo4j

We are usually working around this by having a copy of the actual config
which overrides the fields that are using problematic converters to use
something else.
However, with the refactor around configs, the generated builders don't
really work anymore and I wanted to use a config builder to build the
individual dijkstra configs.
This is a bit of a hack, but it works, soooo 😎

Author: knutwalker

config-api/src/main/java/org/neo4j/gds/config/NodeIdParser.java

@@ -98,17 +98,27 @@ private static Double parsePropertyValue(Object input, String parameterName) {
     }
 
     private static Long parseNodeId(Object input, String parameterName) {
-        if (input instanceof Node) {
-            return ((Node) input).getId();
-        } else if (input instanceof Number) {
-            return ((Number) input).longValue();
+        if (input instanceof Number num) {
+            return num.longValue();
         }
 
-        throw new IllegalArgumentException(formatWithLocale(
-            "Failed to parse `%s` as a List of node IDs. A Node, Number or collection of the same can be parsed, but this `%s` cannot.",
-            parameterName,
-            input.getClass().getSimpleName()
-        ));
+        try {
+            if (input instanceof Node node) {
+                return node.getId();
+            }
+
+            throw new IllegalArgumentException(formatWithLocale(
+                "Failed to parse `%s` as a List of node IDs. A Node, Number or collection of the same can be parsed, but this `%s` cannot.",
+                parameterName,
+                input.getClass().getSimpleName()
+            ));
+        } catch (NoClassDefFoundError neo4jNotAvailable) {
+            throw new IllegalArgumentException(formatWithLocale(
+                "Failed to parse `%s` as a List of node IDs. A number or collection of numbers can be parsed, but this `%s` cannot.",
+                parameterName,
+                input.getClass().getSimpleName()
+            ));
+        }
     }
 
     /**
@@ -120,7 +130,7 @@ private static Long parseNodeId(Object input, String parameterName) {
      * @return A {@code java.lang.Long} of node IDs.
      */
     public static long parseToSingleNodeId(Object input, String parameterName) {
-        if (input instanceof Collection collection) {
+        if (input instanceof Collection<?> collection) {
             if (collection.size() != 1) {
                 throw new IllegalArgumentException(formatWithLocale(
                     "Failed to parse `%s` as a single node ID. A collection can be parsed if it contains a single element, but this `%s` contains `%s` elements.",
@@ -131,16 +141,25 @@ public static long parseToSingleNodeId(Object input, String parameterName) {
             }
             input = collection.iterator().next();
         }
-        if (input instanceof Number) {
-            return ((Number) input).longValue();
+        if (input instanceof Number num) {
+            return num.longValue();
         }
-        if (input instanceof Node) {
-            return ((Node) input).getId();
+        try {
+            if (input instanceof Node node) {
+                return node.getId();
+            }
+
+            throw new IllegalArgumentException(formatWithLocale(
+                "Failed to parse `%s` as a single node ID. A Node, a Number or a collection containing a single Node or Number can be parsed, but this `%s` cannot.",
+                parameterName,
+                input.getClass().getSimpleName()
+            ));
+        } catch (NoClassDefFoundError neo4jNotAvailable) {
+            throw new IllegalArgumentException(formatWithLocale(
+                "Failed to parse `%s` as a single node ID. A number or a collection containing a single number can be parsed, but this `%s` cannot.",
+                parameterName,
+                input.getClass().getSimpleName()
+            ));
         }
-        throw new IllegalArgumentException(formatWithLocale(
-            "Failed to parse `%s` as a single node ID. A Node, a Number or a collection containing a single Node or Number can be parsed, but this `%s` cannot.",
-            parameterName,
-            input.getClass().getSimpleName()
-        ));
     }
 }