/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.render.autoregister;

 import java.lang.reflect.Field;

 import javax.faces.render.Renderer;

 import org.seasar.framework.beans.BeanDesc;

 import org.seasar.framework.beans.factory.BeanDescFactory;

 import org.seasar.framework.container.ComponentDef;

 import org.seasar.framework.container.autoregister.ComponentAutoRegister;

 import org.seasar.framework.container.factory.AnnotationHandler;

 import org.seasar.framework.container.factory.AnnotationHandlerFactory;

 import org.seasar.framework.util.ClassUtil;

 import org.seasar.framework.util.ModifierUtil;

 import org.seasar.teeda.core.JsfConstants;

 import org.seasar.teeda.core.render.html.support.HtmlRenderKitKeyGenerateUtil;

 /**

  * @author shot

  */

 public class TeedaRendererComponentAutoRegister extends ComponentAutoRegister {

     private String familyFieldName;

     private String renderTypeFieldName;

     public TeedaRendererComponentAutoRegister() {

         familyFieldName = JsfConstants.COMPONENT_FAMILY;

         renderTypeFieldName = JsfConstants.RENDERER_TYPE;

     }

     protected void register(final String className) {

         final AnnotationHandler annoHandler = AnnotationHandlerFactory

                 .getAnnotationHandler();

         final ComponentDef cd = annoHandler.createComponentDef(className,

                 getInstanceDef(), getAutoBindingDef(), isExternalBinding());

         final Class componentClass = cd.getComponentClass();

         if (ClassUtil.isAssignableFrom(Renderer.class, componentClass)) {

             String family = getConstantValue(componentClass,

                     getFamilyFieldName());

             String renderType = getConstantValue(componentClass,

                     getRenderTypeFieldName());

             final String rendererComponentName = HtmlRenderKitKeyGenerateUtil

                     .getGeneratedKey(family, renderType);

             cd.setComponentName(rendererComponentName);

             annoHandler.appendDI(cd);

             annoHandler.appendAspect(cd);

             annoHandler.appendInitMethod(cd);

             customize(cd);

             if (!getContainer().hasComponentDef(rendererComponentName)) {

                 getContainer().register(cd);

             }

         }

     }

     public void setFamilyFieldName(String familyFieldName) {

         this.familyFieldName = familyFieldName;

     }

     public void setRenderTypeFieldName(String renderTypeFieldName) {

         this.renderTypeFieldName = renderTypeFieldName;

     }

     public String getFamilyFieldName() {

         return familyFieldName;

     }

     public String getRenderTypeFieldName() {

         return renderTypeFieldName;

     }

     protected String getConstantValue(Class clazz, String fieldName) {

         BeanDesc beanDesc = BeanDescFactory.getBeanDesc(clazz);

         if (beanDesc.hasField(fieldName)) {

             Field f = beanDesc.getField(fieldName);

             if (isPublicFinalConstant(f)) {

                 return (String) beanDesc.getFieldValue(fieldName, null);

             }

         }

         return null;

     }

     private static boolean isPublicFinalConstant(Field field) {

         return ModifierUtil.isPublicStaticFinal(field.getModifiers())

                 && field.getType().equals(String.class);

     }

 }