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   * JBoss, Home of Professional Open Source
   * Copyright 2014, Red Hat, Inc., and individual contributors
   * by the @authors tag. See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   * 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
  * 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.jboss.weld;
 import static org.jboss.weld.util.reflection.Reflections.cast;
 import java.util.Set;
Abstract implementation of CDI which forwards all Instance methods to a delegate. Furthermore, it allows the calling class to be identified using the getCallingClassName() method.

Jozef Hartinger
 public abstract class AbstractCDI<T> extends CDI<T> {
     // CDI API / IMPL classes calling CDI.current()
     // used for caller detection
     protected final Set<StringknownClassNames;
     public AbstractCDI() {
         ImmutableSet.Builder<Stringnames = ImmutableSet.builder();
         for (Class<?> clazz = getClass(); clazz != CDI.classclazz = clazz.getSuperclass()) {
         this. =;
     public Iterator<T> iterator() {
         return getInstance().iterator();
     public T get() {
         return getInstance().get();
     public Instance<T> select(Annotation... qualifiers) {
         return getInstance().select(qualifiers);
     public <U extends T> Instance<U> select(Class<U> subtypeAnnotation... qualifiers) {
         return getInstance().select(subtypequalifiers);
     public <U extends T> Instance<U> select(TypeLiteral<U> subtypeAnnotation... qualifiers) {
         return getInstance().select(subtypequalifiers);
     public boolean isUnsatisfied() {
         return getInstance().isUnsatisfied();
     public boolean isAmbiguous() {
         return getInstance().isAmbiguous();
     public void destroy(T instance) {

Examines java.lang.StackTraceElements to figure out which class invoked a method on javax.enterprise.inject.spi.CDI.
    protected String getCallingClassName() {
        boolean outerSubclassReached = false;
        for (StackTraceElement element : Thread.currentThread().getStackTrace()) {
            // the method call that leads to the first invocation of this class or its subclass is considered the caller
            if (!.contains(element.getClassName())) {
                if (outerSubclassReached) {
                    return element.getClassName();
            } else {
                outerSubclassReached = true;
    private Instance<T> getInstance() {
        return cast(BeanManagerProxy.unwrap(getBeanManager()).instance());
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