/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010 Red Hat Inc. and/or its affiliates and other 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
 * 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.jboss.arquillian.core.impl;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import org.jboss.arquillian.core.api.Instance;
import org.jboss.arquillian.core.spi.InjectionPoint;
import org.jboss.arquillian.core.spi.InvocationException;

/**
 * FieldInjectionPointImpl
 *
 * @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
 * @version $Revision: $
 */
public class InjectionPointImpl implements InjectionPoint
{
   private Object target;
   private Field field;
   private Class<? extends Annotation> scope;

   //-------------------------------------------------------------------------------------||
   // Public Factory Methods -------------------------------------------------------------||
   //-------------------------------------------------------------------------------------||
   
   public static InjectionPointImpl of(Object target, Field field)
   {
      return new InjectionPointImpl(target, field, Reflections.getScope(field));
   }
   
   InjectionPointImpl(Object target, Field field, Class<? extends Annotation> scope)
   {
      this.target = target;
      this.field = field;
      this.scope = scope;
   }

   //-------------------------------------------------------------------------------------||
   // Required Implementations - InjectionPoint ------------------------------------------||
   //-------------------------------------------------------------------------------------||

   /* (non-Javadoc)
    * @see org.jboss.arquillian.api.Typed#getType()
    */
   @Override
   public Type getType()
   {
      ParameterizedType type = (ParameterizedType) field.getGenericType();
      if(type.getActualTypeArguments()[0] instanceof ParameterizedType)
      {
         ParameterizedType first = (ParameterizedType)type.getActualTypeArguments()[0];
         return first.getRawType();
      }
      else
      {
         return type.getActualTypeArguments()[0];
      }
   }
   
   public Class<? extends Annotation> getScope()
   {
      return scope;
   }
   
   /* (non-Javadoc)
    * @see org.jboss.arquillian.api.InjectionPoint#set(org.jboss.arquillian.api.Instance)
    */
   @Override
   public void set(Instance<?> value) throws InvocationException
   {
      try
      {
         if(!field.isAccessible())
         {
            field.setAccessible(true);
         }
         field.set(target, value);
      }
      catch (Exception e) 
      {
         throw new InvocationException(e.getCause());
      }
   }
}
