1 files changed, 46 insertions, 0 deletions
diff --git a/runners/gradle-plugin/src/main/kotlin/ProxyUtils.kt b/runners/gradle-plugin/src/main/kotlin/ProxyUtils.kt
new file mode 100644
index 00000000..7bdf2f9d
--- /dev/null
+++ b/runners/gradle-plugin/src/main/kotlin/ProxyUtils.kt
@@ -0,0 +1,46 @@
+package org.jetbrains.dokka
+
+import java.lang.reflect.InvocationHandler
+import java.lang.reflect.InvocationTargetException
+import java.lang.reflect.Method
+import java.lang.reflect.Proxy
+
+
+/**
+ * Warning! Hard reflection magic used here.
+ *
+ * Creates [java.lang.reflect.Proxy] with pass through invocation algorithm,
+ * to create access proxy for [delegate] into [targetClassLoader].
+ */
+@Suppress("UNCHECKED_CAST")
+inline fun <reified T : Any> automagicTypedProxy(targetClassLoader: ClassLoader, delegate: Any): T =
+        automagicProxy(targetClassLoader, T::class.java, delegate) as T
+
+
+/**
+ * Warning! Hard reflection magic used here.
+ *
+ * Creates [java.lang.reflect.Proxy] with pass through invocation algorithm,
+ * to create access proxy for [delegate] into [targetClassLoader].
+ *
+ */
+fun automagicProxy(targetClassLoader: ClassLoader, targetType: Class<*>, delegate: Any): Any =
+        Proxy.newProxyInstance(
+                targetClassLoader,
+                arrayOf(targetType),
+                DelegatedInvocationHandler(delegate)
+        )
+
+class DelegatedInvocationHandler(private val delegate: Any) : InvocationHandler {
+
+    @Throws(Throwable::class)
+    override fun invoke(proxy: Any, method: Method, args: Array<Any?>?): Any? {
+        val delegateMethod = delegate.javaClass.getMethod(method.name, *method.parameterTypes)
+        try {
+            delegateMethod.isAccessible = true
+            return delegateMethod.invoke(delegate, *(args ?: emptyArray()))
+        } catch (ex: InvocationTargetException) {
+            throw ex.targetException
+        }
+    }
+}