Implement java.lang.reflect.Constructor.constructNative.

Change-Id: Iefa92ad1bd89073d4bfa9a80b9e4f0dea90a5849
diff --git a/src/java_lang_reflect_Constructor.cc b/src/java_lang_reflect_Constructor.cc
new file mode 100644
index 0000000..10a8f07
--- /dev/null
+++ b/src/java_lang_reflect_Constructor.cc
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#include "jni_internal.h"
+#include "class_linker.h"
+#include "object.h"
+#include "reflection.h"
+
+#include "JniConstants.h" // Last to avoid problems with LOG redefinition.
+
+namespace art {
+
+namespace {
+
+/*
+ * We get here through Constructor.newInstance().  The Constructor object
+ * would not be available if the constructor weren't public (per the
+ * definition of Class.getConstructor), so we can skip the method access
+ * check.  We can also safely assume the constructor isn't associated
+ * with an interface, array, or primitive class.
+ */
+jobject Constructor_constructNative(JNIEnv* env, jobject javaMethod, jobjectArray javaArgs, jclass javaDeclaringClass, jobjectArray javaParams, jint, jboolean) {
+  Class* c = Decode<Class*>(env, javaDeclaringClass);
+  if (c->IsAbstract()) {
+    Thread::Current()->ThrowNewException("Ljava/lang/InstantiationException;",
+        "Can't instantiate abstract class %s", PrettyDescriptor(c->GetDescriptor()).c_str());
+    return NULL;
+  }
+
+  Object* receiver = c->AllocObject();
+  if (receiver == NULL) {
+    return NULL;
+  }
+
+  jobject javaReceiver = AddLocalReference<jobject>(env, receiver);
+  InvokeMethod(env, javaMethod, javaReceiver, javaArgs, javaParams);
+
+  // Constructors are ()V methods, so we shouldn't touch the result of InvokeMethod.
+  return javaReceiver;
+}
+
+static JNINativeMethod gMethods[] = {
+  NATIVE_METHOD(Constructor, constructNative, "([Ljava/lang/Object;Ljava/lang/Class;[Ljava/lang/Class;IZ)Ljava/lang/Object;"),
+};
+
+}  // namespace
+
+void register_java_lang_reflect_Constructor(JNIEnv* env) {
+  jniRegisterNativeMethods(env, "java/lang/reflect/Constructor", gMethods, NELEM(gMethods));
+}
+
+}  // namespace art