/**

  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.commons.inject.impl;

 import org.apache.commons.inject.api.IBinding;

 import org.apache.commons.inject.api.IInjector;

 import org.apache.commons.inject.api.IPoint;

 import org.apache.commons.inject.api.IProvider;

 public class BindingProxy<T> implements IBinding<T>, IInjectorAware {

         private IBinding<T> binding;

         private boolean initialized;

         private boolean isResolvedLater;

         private final String cause;

         private final RuntimeException rte = new RuntimeException();

         public BindingProxy(String pCause) {

                 cause = pCause;

         }

         public boolean isResolvedLater() {

                 return isResolvedLater;

         }

         public void setResolvedLater(boolean pResolvedLater) {

                 isResolvedLater = pResolvedLater;

         }

         @Override

         public synchronized IProvider<T> getProvider() {

                 if (!initialized) {

                         throw new IllegalStateException("This Binding hasn't been initialized.", rte);

                 }

                 return binding.getProvider();

         }

         @Override

         public IPoint<T> getPoint() {

                 if (!initialized) {

                         throw new IllegalStateException("This Binding hasn't been initialized.");

                 }

                 return binding.getPoint();

         }

         public synchronized void setBinding(IBinding<T> pBinding) {

                 if (pBinding == null) {

                         throw new NullPointerException("The proxied binding must not be null.");

                 }

                 binding = pBinding;

                 initialized = true;

         }

         public String getCause() {

                 return cause;

         }

         @Override

         public void init(IInjector pInjector) {

                 if (binding != null  &&  binding instanceof IInjectorAware) {

                         ((IInjectorAware) binding).init(pInjector);

                 }

         }

 }