content: /**
   * Copyright (C) 2010-2016 eBusiness Information, Excilys Group
   *
   * 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.TRUE;
  import static com.helger.jcodemodel.JExpr.invoke;
  
  import java.util.List;
  
  import javax.lang.model.element.Element;
  import javax.lang.model.element.ExecutableElement;
  import javax.lang.model.element.VariableElement;
  import javax.lang.model.type.TypeKind;
  import javax.lang.model.type.TypeMirror;
  
  import org.androidannotations.AndroidAnnotationsEnvironment;
  import org.androidannotations.ElementValidation;
  import org.androidannotations.annotations.OptionsItem;
  import org.androidannotations.handler.BaseAnnotationHandler;
  import org.androidannotations.helper.CanonicalNameConstants;
  import org.androidannotations.helper.IdValidatorHelper;
  import org.androidannotations.holder.HasOptionsMenu;
  import org.androidannotations.rclass.IRClass;
  
  import com.helger.jcodemodel.IJExpression;
  import com.helger.jcodemodel.JBlock;
  import com.helger.jcodemodel.JFieldRef;
  import com.helger.jcodemodel.JInvocation;
  
  public class OptionsItemHandler extends BaseAnnotationHandler<HasOptionsMenu> {
  
  	public OptionsItemHandler(AndroidAnnotationsEnvironment environment) {
  		super(OptionsItem.class, environment);
  	}
  
  	@Override
  	public void validate(Element element, ElementValidation validation) {
  		validatorHelper.enclosingElementHasEActivityOrEFragment(element, validation);
  
  		validatorHelper.resIdsExist(element, IRClass.Res.ID, IdValidatorHelper.FallbackStrategy.USE_ELEMENT_NAME, validation);
  
  		validatorHelper.isNotPrivate(element, validation);
  
  		validatorHelper.doesntThrowException(element, validation);
  
  		validatorHelper.uniqueId(element, validation);
  
  		ExecutableElement executableElement = (ExecutableElement) element;
  
  		validatorHelper.returnTypeIsVoidOrBoolean(executableElement, validation);
  
  		validatorHelper.param.type(CanonicalNameConstants.MENU_ITEM).optional().validate(executableElement, validation);
  	}
  
  	@Override
  	public void process(Element element, HasOptionsMenu holder) {
  		String methodName = element.getSimpleName().toString();
  
  		ExecutableElement executableElement = (ExecutableElement) element;
  		List<? extends VariableElement> parameters = executableElement.getParameters();
  		TypeMirror returnType = executableElement.getReturnType();
  		boolean returnMethodResult = returnType.getKind() != TypeKind.VOID;
  
  		boolean hasItemParameter = parameters.size() == 1;
  
  		List<JFieldRef> idsRefs = annotationHelper.extractAnnotationFieldRefs(element, IRClass.Res.ID, true);
  
  		JBlock block = holder.getOnOptionsItemSelectedMiddleBlock();
  
  		IJExpression ifExpr = holder.getOnOptionsItemSelectedItemId().eq(idsRefs.get(0));
  		for (int i = 1; i < idsRefs.size(); i++) {
  			ifExpr = ifExpr.cor(holder.getOnOptionsItemSelectedItemId().eq(idsRefs.get(i)));
  		}
  
  		JBlock itemIfBody = block._if(ifExpr)._then();
  		JInvocation methodCall = invoke(methodName);
  
  		if (returnMethodResult) {
  			itemIfBody._return(methodCall);
  		} else {
  			itemIfBody.add(methodCall);
  			itemIfBody._return(TRUE);
  		}
  
  		if (hasItemParameter) {
  			methodCall.arg(holder.getOnOptionsItemSelectedItem());
  		}
  	}
  }
  