[camel-quarkus] 02/02: Workaround #2718 Use com.schibsted.spt.data.jslt.FunctionUtils with an explicit class loader or let it fall back to TCCL

[jamesnetherton]

This is an automated email from the ASF dual-hosted git repository.

jamesnetherton pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/camel-quarkus.git

commit b5833d531e55eb627f88a4b0edeecc15b19e7126
Author: Peter Palaga <ppal...@redhat.com>
AuthorDate: Thu Jun 3 21:29:17 2021 +0200

    Workaround #2718 Use com.schibsted.spt.data.jslt.FunctionUtils with an 
explicit class loader or let it fall back to TCCL
---
 .../component/jslt/it/JsltConfiguration.java       | 31 ++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git 
a/integration-tests/jslt/src/main/java/org/apache/camel/quarkus/component/jslt/it/JsltConfiguration.java
 
b/integration-tests/jslt/src/main/java/org/apache/camel/quarkus/component/jslt/it/JsltConfiguration.java
index b678030..bbfcb34 100644
--- 
a/integration-tests/jslt/src/main/java/org/apache/camel/quarkus/component/jslt/it/JsltConfiguration.java
+++ 
b/integration-tests/jslt/src/main/java/org/apache/camel/quarkus/component/jslt/it/JsltConfiguration.java
@@ -16,17 +16,20 @@
  */
 package org.apache.camel.quarkus.component.jslt.it;
 
+import java.lang.reflect.Method;
+
 import javax.inject.Named;
 
 import com.schibsted.spt.data.jslt.Expression;
+import com.schibsted.spt.data.jslt.Function;
+import com.schibsted.spt.data.jslt.JsltException;
 import com.schibsted.spt.data.jslt.Parser;
 import com.schibsted.spt.data.jslt.filters.JsltJsonFilter;
+import com.schibsted.spt.data.jslt.impl.FunctionWrapper;
 import org.apache.camel.component.jslt.JsltComponent;
 
 import static java.util.Collections.singleton;
 
-import static com.schibsted.spt.data.jslt.FunctionUtils.wrapStaticMethod;
-
 public class JsltConfiguration {
 
     @Named
@@ -50,6 +53,30 @@ public class JsltConfiguration {
         return component;
     }
 
+    /* A variant of 
com.schibsted.spt.data.jslt.FunctionUtils.wrapStaticMethod() using TCCL
+     * Otherwise the class is not found on Quarkus Platform where the class 
loading setup is a bit different.
+     * Workaround for https://github.com/schibsted/jslt/issues/197 */
+    static public Function wrapStaticMethod(String functionName,
+            String className,
+            String methodName)
+            throws LinkageError, ExceptionInInitializerError, 
ClassNotFoundException {
+        Class klass = Class.forName(className, true, 
Thread.currentThread().getContextClassLoader());
+        Method[] methods = klass.getMethods();
+        Method method = null;
+        for (int ix = 0; ix < methods.length; ix++) {
+            if (methods[ix].getName().equals(methodName)) {
+                if (method == null)
+                    method = methods[ix];
+                else
+                    throw new JsltException("More than one method named '" + 
methodName + "'");
+            }
+        }
+        if (method == null)
+            throw new JsltException("No such method: '" + methodName + "'");
+
+        return new FunctionWrapper(functionName, method);
+    }
+
     public static Ping createInfiniteRecursionObject() {
         Ping ping = new Ping();
         Pong pong = new Pong();