Workaround for dataformat (because of iCal4j update - #5099

extensions/ical/deployment/src/main/java/org/apache/camel/quarkus/component/ical/deployment/IcalProcessor.java

@@ -20,9 +20,13 @@
 
 import io.quarkus.deployment.annotations.BuildProducer;
 import io.quarkus.deployment.annotations.BuildStep;
+import io.quarkus.deployment.builditem.CombinedIndexBuildItem;
 import io.quarkus.deployment.builditem.FeatureBuildItem;
+import io.quarkus.deployment.builditem.IndexDependencyBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.NativeImageResourceBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.NativeImageResourceDirectoryBuildItem;
+import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
+import io.quarkus.deployment.builditem.nativeimage.RuntimeInitializedClassBuildItem;
 
 class IcalProcessor {
 
@@ -57,4 +61,22 @@ void nativeResources(
                 .forEach(path -> nativeResourceDirs.produce(new NativeImageResourceDirectoryBuildItem(path)));
     }
 
+    @BuildStep
+    void registerWsSecurityReflectionItems(CombinedIndexBuildItem combinedIndexBuildItem,
+            BuildProducer<ReflectiveClassBuildItem> reflectiveClass) {
+        reflectiveClass
+                .produce(ReflectiveClassBuildItem.builder("net.fortuna.ical4j.util.MapTimeZoneCache").methods(true).build());
+    }
+
+    @BuildStep
+    IndexDependencyBuildItem registerDependencyForIndex() {
+        return new IndexDependencyBuildItem("org.mnode.ical4j", "ical4j");
+    }
+
+    @BuildStep
+    void runtimeInitializedClasses(BuildProducer<RuntimeInitializedClassBuildItem> runtimeInitializedClass) {
+        runtimeInitializedClass
+                .produce(new RuntimeInitializedClassBuildItem("net.fortuna.ical4j.validate.schema.JsonSchemaValidator"));
+    }
+
 }

extensions/ical/runtime/src/main/java/org/apache/camel/quarkus/component/ical/deployment/SchemaValidatorFactorySubst.java

@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.component.ical.deployment;
+
+import com.oracle.svm.core.annotate.Substitute;
+import com.oracle.svm.core.annotate.TargetClass;
+import net.fortuna.ical4j.model.parameter.Schema;
+import net.fortuna.ical4j.model.property.StructuredData;
+import net.fortuna.ical4j.validate.Validator;
+import net.fortuna.ical4j.validate.schema.SchemaValidatorFactory;
+
+@TargetClass(value = SchemaValidatorFactory.class)
+final class SchemaValidatorFactorySubstitutions {
+
+    @Substitute
+    public static Validator<StructuredData> newInstance(Schema schema) {
+        //see https://github.com/apache/camel-quarkus/issues/5099 for more details
+        //Method causes error (it is unclear to me, why it is happening):
+        //UnresolvedElementException: Discovered unresolved method during parsing: net.fortuna.ical4j.validate.schema.JsonSchemaValidator.<init>(java.net.URL).
+        // This error is reported at image build time because class net.fortuna.ical4j.validate.schema.SchemaValidatorFactory
+        // is registered for linking at image build time by command line
+
+        throw new RuntimeException("Feature is not supported.");
+    }
+}