Fix attribute parsing when missing from request with empty default

Copilot · sbrunner · Copilot · commit 4c5b3d890542 · 2026-02-11T14:05:51.000Z
When an attribute is missing from the request and has an empty default value,
throw ObjectMissingException instead of trying to parse with empty object.
This prevents OneOf validation errors on missing required attributes.

Co-authored-by: sbrunner &lt;353872+sbrunner@users.noreply.github.com&gt;
diff --git a/core/src/main/java/org/mapfish/print/attribute/ReflectiveAttribute.java b/core/src/main/java/org/mapfish/print/attribute/ReflectiveAttribute.java
@@ -25,6 +25,7 @@
 import org.mapfish.print.parser.MapfishParser;
 import org.mapfish.print.parser.OneOf;
 import org.mapfish.print.parser.ParserUtils;
+import org.mapfish.print.wrapper.ObjectMissingException;
 import org.mapfish.print.wrapper.PArray;
 import org.mapfish.print.wrapper.PElement;
 import org.mapfish.print.wrapper.PObject;
@@ -440,6 +441,12 @@ public Object getValue(
         throw new IllegalArgumentException(message);
       }
       pValue = this.getDefaultValue();
+      // If the attribute is missing from the request and has no meaningful default,
+      // throw ObjectMissingException to let the framework handle it properly
+      if (pValue != null && !pValue.keys().hasNext()) {
+        throw new ObjectMissingException(
+            requestJsonAttributes, attributeName);
+      }
     }
     MapfishParser.parse(errorOnExtraParameters, pValue, value);
     return value;
