Fix SemanticTextFieldMapperTests

Author: kderusso

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/mapper/SemanticTextField.java

@@ -125,6 +125,24 @@ static MinimalServiceSettings parseModelSettingsFromMap(Object node) {
         }
     }
 
+    static ChunkingSettings parseChunkingSettingsFromMap(Object node) {
+        if (node == null) {
+            return null;
+        }
+        try {
+            Map<String, Object> map = XContentMapValues.nodeMapValue(node, CHUNKING_SETTINGS_FIELD);
+            XContentParser parser = new MapXContentParser(
+                NamedXContentRegistry.EMPTY,
+                DeprecationHandler.IGNORE_DEPRECATIONS,
+                map,
+                XContentType.JSON
+            );
+            return ChunkingSettingsBuilder.fromMap(map);
+        } catch (Exception exc) {
+            throw new ElasticsearchException(exc);
+        }
+    }
+
     @Override
     public List<String> originalValues() {
         return originalValues != null ? originalValues : Collections.emptyList();

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapper.java

@@ -184,7 +184,7 @@ public static class Builder extends FieldMapper.Builder {
             CHUNKING_SETTINGS_FIELD,
             true,
             () -> null,
-            (n, c, o) -> ChunkingSettingsBuilder.fromMap((Map<String, Object>) o),
+            (n, c, o) -> SemanticTextField.parseChunkingSettingsFromMap(o),
             mapper -> ((SemanticTextFieldType) mapper.fieldType()).chunkingSettings,
             XContentBuilder::field,
             Objects::toString