Package com.caucho.config.inject

Source Code of com.caucho.config.inject.InjectionPointImplHandle

/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT.  See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
*   Free Software Foundation, Inc.
*   59 Temple Place, Suite 330
*   Boston, MA 02111-1307  USA
*
* @author Scott Ferguson
*/

package com.caucho.config.inject;

import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;

import javax.decorator.Delegate;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.InjectionPoint;

import com.caucho.config.reflect.AnnotatedFieldImpl;
import com.caucho.config.reflect.AnnotatedMethodImpl;
import com.caucho.config.reflect.ReflectionAnnotatedFactory;
import com.caucho.inject.Module;

/**
*/
@Module
public class InjectionPointImplHandle implements Serializable
{
  private final String _beanClass;
  private final Annotation []_beanQualifiers;
 
  private final String _typeClass;
  private final String _memberClass;
  private final String _memberName;
  private final MemberType _memberType;
 
  private HashSet<Annotation> _qualifiers;

  InjectionPointImplHandle(String beanClass,
                           Set<Annotation> beanQualifierSet,
                           Member member,
                           HashSet<Annotation> qualifiers,
                           String typeClass)
  {
    Annotation []beanQualifiers = new Annotation[beanQualifierSet.size()];
    beanQualifierSet.toArray(beanQualifiers);

    _beanClass = beanClass;
    _beanQualifiers = beanQualifiers;
   
    _typeClass = typeClass;
   
    _memberClass = member.getDeclaringClass().getName();
    _memberName = member.getName();
   
    if (member instanceof Field)
      _memberType = MemberType.FIELD;
    else if (member instanceof Method)
      _memberType = MemberType.METHOD;
    else
      _memberType = MemberType.CONSTRUCTOR;
   
    _qualifiers = new HashSet<Annotation>(qualifiers);
  }
 
  private Object readResolve()
  {
    try {
      InjectManager cdiManager = InjectManager.create();
     
      Class<?> beanClass = Class.forName(_beanClass,
                                         false,
                                         cdiManager.getClassLoader());
     
      Class<?> typeClass = Class.forName(_typeClass,
                                         false,
                                         cdiManager.getClassLoader());
     
      Annotation []qualifiers = new Annotation[_qualifiers.size()];
      _qualifiers.toArray(qualifiers);

      Bean<?> bean
        = cdiManager.resolve(cdiManager.getBeans(beanClass, _beanQualifiers));

      Class<?> memberClass = Class.forName(_memberClass,
                                           false,
                                           cdiManager.getClassLoader());

      AnnotatedType annType
        = ReflectionAnnotatedFactory.introspectType(memberClass);
     
      Member member;
      Annotated annotated;
     
      switch (_memberType) {
      case FIELD:
        member = getField(memberClass, _memberName);
        annotated = new AnnotatedFieldImpl(annType, (Field) member);
        break;
       
      case METHOD:
        member = getMethod(memberClass, _memberName);
        annotated = new AnnotatedMethodImpl((Method) member);
        break;
       
      default:
        member = memberClass.getConstructors()[0];
        annotated = annType;
        break;
      }
     
      return new InjectionPointImpl(cdiManager, bean, annotated, member,
                                    typeClass);
    } catch (Exception e) {
      throw new RuntimeException(_memberClass + ":" + _memberName + ":" + e, e);
    }
  }
 
  private Field getField(Class<?> cl, String name)
  {
    if (cl == null)
      return null;
   
    for (Field field : cl.getDeclaredFields()) {
      if (field.getName().equals(name))
        return field;
    }
   
    return getField(cl.getSuperclass(), name);
  }
 
  private Method getMethod(Class<?> cl, String name)
  {
    if (cl == null)
      return null;
   
    for (Method method : cl.getDeclaredMethods()) {
      if (method.getName().equals(name))
        return method;
    }
   
    return getMethod(cl.getSuperclass(), name);
  }

  @Override
  public String toString()
  {
    return getClass().getSimpleName() + "[" + _memberName + "]";
  }
 
  enum MemberType {
    FIELD,
    METHOD,
    CONSTRUCTOR;
  }
}
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