Package com.caucho.config.reflect

Source Code of com.caucho.config.reflect.AnnotatedElementImpl

/*
* 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.reflect;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;

import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedType;

import com.caucho.config.inject.InjectManager;
import com.caucho.inject.Module;

/**
* Abstract introspected view of a Bean
*/
@Module
public class AnnotatedElementImpl implements Annotated, BaseTypeAnnotated
{
  private static final AnnotationSet NULL_ANN_SET
    = new AnnotationSet();
 
  private BaseType _type;

  private Set<Type> _typeSet;

  private AnnotationSet _annSet;

  public AnnotatedElementImpl(BaseType type,
                              Annotated annotated,
                              Annotation []annList)
  {
    _type = type;

    if (annotated != null) {
      Set<Annotation> annSet = annotated.getAnnotations();
     
      if (annSet != null && annSet.size() > 0) {
        _annSet = new AnnotationSet(annSet);
      }
    }
   
    if (annList != null && annList.length > 0) {
      if (_annSet == null)
        _annSet = new AnnotationSet();
     
      for (Annotation ann : annList) {
        _annSet.add(ann);
      }
    }
  }

  public AnnotatedElementImpl(Annotated annotated)
  {
    this(createBaseType(annotated), annotated, null);
  }

  public AnnotatedElementImpl(Class<?> cl,
                              Annotated annotated,
                              Annotation []annotationList)
  {
    this(createBaseType(cl), annotated, annotationList);
  }
 
  protected static BaseType createBaseType(Annotated ann)
  {
    if (ann instanceof BaseTypeAnnotated)
      return ((BaseTypeAnnotated) ann).getBaseTypeImpl();
    else
      return createBaseType(ann.getBaseType());
  }
 
  protected static BaseType createBaseType(AnnotatedType<?> declaringType)
  {
    if (declaringType instanceof BaseTypeAnnotated)
      return ((BaseTypeAnnotated) declaringType).getBaseTypeImpl();
    else
      return createBaseType(declaringType.getBaseType());
  }
 
  protected static BaseType createBaseType(AnnotatedType<?> declaringType,
                                           Type type)
  {
    HashMap<String,BaseType> paramMap = null;
    String paramDeclName = null;
   
    return createBaseType(declaringType, type, paramMap, paramDeclName);
  }
 
  protected static BaseType createBaseType(AnnotatedType<?> declaringType,
                                           Type type,
                                           String paramDeclName)
  {
    HashMap<String,BaseType> paramMap = null;
   
    return createBaseType(declaringType, type, paramMap, paramDeclName);
  }
 
  protected static BaseType createBaseType(AnnotatedType<?> declaringType,
                                           Type type,
                                           HashMap<String,BaseType> paramMap,
                                           String paramDeclName)
  {
    // ioc/0242
    BaseType baseType = createBaseType(declaringType,
                                       type,
                                       paramMap,
                                       paramDeclName,
                                       BaseType.ClassFill.PLAIN);
   
    return baseType;
  }
 
  protected static BaseType createBaseType(AnnotatedType<?> declaringType,
                                           Type type,
                                           HashMap<String,BaseType> paramMap,
                                           String paramDeclName,
                                           BaseType.ClassFill classFill)
    {
      if (declaringType instanceof BaseTypeAnnotated) {
        BaseTypeAnnotated baseTypeAnn = (BaseTypeAnnotated) declaringType;
       
        if (paramMap == null)
          paramMap = baseTypeAnn.getBaseTypeParamMap();
     
        return BaseType.create(type, paramMap, paramDeclName, classFill);
      }
    /*
    else if (declaringType instanceof ReflectionAnnotatedType<?>) {
      declBaseType = ((ReflectionAnnotatedType<?>) declaringType).getBaseTypeImpl();
     
      return declBaseType.create(type, declBaseType.getParamMap(), true);
    }
    */
   
    return createBaseType(type);
  }

  protected static BaseType createBaseType(Type type)
  {
    InjectManager cdiManager = InjectManager.getCurrent();
   
    return cdiManager.createSourceBaseType(type);
  }

  @Override
  public Type getBaseType()
  {
    return _type.toType();
  }
 
  @Override
  public BaseType getBaseTypeImpl()
  {
    return _type;
  }
 
  @Override
  public HashMap<String,BaseType> getBaseTypeParamMap()
  {
    return getBaseTypeImpl().getParamMap();
  }
 
  @Override
  public Set<VarType<?>> getTypeVariables()
  {
    HashSet<VarType<?>> typeVariables = new HashSet<VarType<?>>();
   
    fillTypeVariables(typeVariables);
   
    return typeVariables;
  }

  protected void fillTypeVariables(Set<VarType<?>> typeVariables)
  {
    getBaseTypeImpl().fillSyntheticTypes(typeVariables);
  }

  @Override
  public Set<Type> getTypeClosure()
  {
    if (_typeSet == null) {
      InjectManager cdiManager = InjectManager.getCurrent();
     
      _typeSet = _type.getTypeClosure(cdiManager);
    }

    return _typeSet;
  }

  public void addAnnotations(Collection<Annotation> annSet)
  {
    for (Annotation ann : annSet)
      addAnnotation(ann);
  }

  public void addAnnotations(Annotation []annSet)
  {
    for (Annotation ann : annSet)
      addAnnotation(ann);
  }
 
  public void addAnnotation(Annotation newAnn)
  {
    if (_annSet == null)
      _annSet = new AnnotationSet();
   
    _annSet.replace(newAnn);
  }
 
  public void addAnnotationIfAbsent(Annotation newAnn)
  {
    if (! isAnnotationPresent(newAnn.annotationType()))
      addAnnotation(newAnn);
  }

  public void removeAnnotation(Annotation ann)
  {
    if (_annSet == null)
      return;

    _annSet.remove(ann);
  }

  public void clearAnnotations()
  {
    if (_annSet != null)
      _annSet.clear();
  }

  /**
   * Returns the declared annotations
   */
  @Override
  public Set<Annotation> getAnnotations()
  {
    if (_annSet != null)
      return _annSet;
    else
      return NULL_ANN_SET;
  }

  /**
   * Returns the matching annotation
   */
  @Override
  @SuppressWarnings("unchecked")
  public <T extends Annotation> T getAnnotation(Class<T> annType)
  {
    if (_annSet == null)
      return null;
   
    return (T) _annSet.getAnnotation(annType);
  }

  /**
   * Returns true if the annotation is present)
   */
  @Override
  public boolean isAnnotationPresent(Class<? extends Annotation> annType)
  {
    if (_annSet == null)
      return false;
   
    return _annSet.isAnnotationPresent(annType);
  }

  @Override
  public String toString()
  {
    return getClass().getSimpleName() + "[" + _type + "]";
  }
}
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