content: /**
   * Copyright (C) 2010-2016 eBusiness Information, Excilys Group
   * Copyright (C) 2016-2020 the AndroidAnnotations project
   *
   * 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.androidannotations.internal.core.handler;
  
  import static com.helger.jcodemodel.JExpr._new;
  
  import java.util.List;
  
  import javax.lang.model.element.Element;
  import javax.lang.model.element.ElementKind;
  import javax.lang.model.element.TypeElement;
  import javax.lang.model.type.DeclaredType;
  import javax.lang.model.type.TypeMirror;
  
  import org.androidannotations.AndroidAnnotationsEnvironment;
  import org.androidannotations.ElementValidation;
  import org.androidannotations.annotations.ViewsById;
  import org.androidannotations.handler.BaseAnnotationHandler;
  import org.androidannotations.handler.MethodInjectionHandler;
  import org.androidannotations.helper.CanonicalNameConstants;
  import org.androidannotations.helper.IdValidatorHelper;
  import org.androidannotations.helper.InjectHelper;
  import org.androidannotations.holder.EComponentWithViewSupportHolder;
  import org.androidannotations.holder.FoundViewHolder;
  import org.androidannotations.rclass.IRClass;
  
  import com.helger.jcodemodel.AbstractJClass;
  import com.helger.jcodemodel.IJAssignmentTarget;
  import com.helger.jcodemodel.IJExpression;
  import com.helger.jcodemodel.JBlock;
  import com.helger.jcodemodel.JFieldRef;
  
  public class ViewsByIdHandler extends BaseAnnotationHandler<EComponentWithViewSupportHolder> implements MethodInjectionHandler<EComponentWithViewSupportHolder> {
  
  	private final InjectHelper<EComponentWithViewSupportHolder> injectHelper;
  
  	public ViewsByIdHandler(AndroidAnnotationsEnvironment environment) {
  		super(ViewsById.class, environment);
  		injectHelper = new InjectHelper<>(validatorHelper, this);
  	}
  
  	@Override
  	public void validate(Element element, ElementValidation validation) {
  		injectHelper.validate(ViewsById.class, element, validation);
  		if (!validation.isValid()) {
  			return;
  		}
  
  		Element param = injectHelper.getParam(element);
  		validatorHelper.isDeclaredType(param, validation);
  
  		validatorHelper.extendsListOfView(param, validation);
  
  		validatorHelper.resIdsExist(element, IRClass.Res.ID, IdValidatorHelper.FallbackStrategy.NEED_RES_ID, validation);
  
  		validatorHelper.isNotPrivate(element, validation);
  	}
  
  	@Override
  	public void process(Element element, EComponentWithViewSupportHolder holder) {
  		injectHelper.process(element, holder);
  	}
  
  	@Override
  	public JBlock getInvocationBlock(EComponentWithViewSupportHolder holder) {
  		return holder.getOnViewChangedBodyInjectionBlock();
  	}
  
  	@Override
  	public void assignValue(JBlock targetBlock, IJAssignmentTarget fieldRef, EComponentWithViewSupportHolder holder, Element element, Element param) {
  		TypeMirror viewType = extractViewClass(param);
  		AbstractJClass viewClass = codeModelHelper.typeMirrorToJClass(viewType);
  
  		String listName = getListName(element, param);
  		IJExpression arrayList = instantiateArrayList(viewType, holder, "list_" + listName);
  
  		List<JFieldRef> idsRefs = annotationHelper.extractAnnotationFieldRefs(element, IRClass.Res.ID, true);
  		for (JFieldRef idRef : idsRefs) {
  			addViewToListIfNotNull(arrayList, viewClass, idRef, holder);
  		}
  
  		targetBlock.add(fieldRef.assign(arrayList));
  	}
  
  	@Override
  	public void validateEnclosingElement(Element element, ElementValidation valid) {
  		validatorHelper.enclosingElementHasEnhancedViewSupportAnnotation(element, valid);
  	}
  
  	private String getListName(Element element, Element param) {
  		String listName = param.getSimpleName().toString();
  		if (element.getKind() == ElementKind.PARAMETER) {
  			listName = element.getEnclosingElement().getSimpleName().toString() + "_" + listName;
  		} else if (element.getKind() == ElementKind.METHOD) {
  			listName = element.getSimpleName().toString() + "_" + listName;
  		}
  		return listName;
  	}
  
  	private IJExpression instantiateArrayList(TypeMirror viewType, EComponentWithViewSupportHolder holder, String name) {
  		TypeElement arrayListTypeElement = annotationHelper.typeElementFromQualifiedName(CanonicalNameConstants.ARRAYLIST);
  		DeclaredType arrayListType = getProcessingEnvironment().getTypeUtils().getDeclaredType(arrayListTypeElement, viewType);
  		AbstractJClass arrayListClass = codeModelHelper.typeMirrorToJClass(arrayListType);
  
  		return holder.getOnViewChangedBodyBeforeInjectionBlock().decl(arrayListClass, name, _new(arrayListClass));
  	}
  
  	private TypeMirror extractViewClass(Element element) {
  		DeclaredType elementType = (DeclaredType) element.asType();
  		List<? extends TypeMirror> elementTypeArguments = elementType.getTypeArguments();
  
  		TypeMirror viewType = annotationHelper.typeElementFromQualifiedName(CanonicalNameConstants.VIEW).asType();
  		if (!elementTypeArguments.isEmpty()) {
  			viewType = elementTypeArguments.get(0);
  		}
  		return viewType;
  	}
  
  	private void addViewToListIfNotNull(IJExpression elementRef, AbstractJClass viewClass, JFieldRef idRef, EComponentWithViewSupportHolder holder) {
  		FoundViewHolder foundViewHolder = holder.getFoundViewHolder(idRef, viewClass);
  		foundViewHolder.getIfNotNullBlock().invoke(elementRef, "add").arg(foundViewHolder.getOrCastRef(viewClass));
  	}
  
  }
  