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 javax.lang.model.element.Element;
  import javax.lang.model.element.ExecutableElement;
  
  import org.androidannotations.AndroidAnnotationsEnvironment;
  import org.androidannotations.ElementValidation;
  import org.androidannotations.annotations.WakeLock;
  import org.androidannotations.annotations.WakeLock.Flag;
  import org.androidannotations.annotations.WakeLock.Level;
  import org.androidannotations.holder.EComponentHolder;
  
  import com.helger.jcodemodel.IJExpression;
  import com.helger.jcodemodel.JBlock;
  import com.helger.jcodemodel.JConditional;
  import com.helger.jcodemodel.JExpr;
  import com.helger.jcodemodel.JInvocation;
  import com.helger.jcodemodel.JMethod;
  import com.helger.jcodemodel.JTryBlock;
  import com.helger.jcodemodel.JVar;
  
  public class WakeLockHandler extends CoreBaseAnnotationHandler<EComponentHolder> {
  
  	public WakeLockHandler(AndroidAnnotationsEnvironment environment) {
  		super(WakeLock.class, environment);
  	}
  
  	@Override
  	public void validate(Element element, ElementValidation valid) {
  		validatorHelper.enclosingElementHasEnhancedComponentAnnotation(element, valid);
  
  		ExecutableElement executableElement = (ExecutableElement) element;
  		coreValidatorHelper.doesNotHaveTraceAnnotationAndReturnValue(executableElement, valid);
  
  		coreValidatorHelper.doesNotUseFlagsWithPartialWakeLock(element, valid);
  
  		validatorHelper.hasWakeLockPermission(getEnvironment().getAndroidManifest(), valid);
  
  		validatorHelper.isNotPrivate(element, valid);
  
  		validatorHelper.isNotFinal(element, valid);
  
  	}
  
  	@Override
  	public void process(Element element, EComponentHolder holder) {
  		ExecutableElement executableElement = (ExecutableElement) element;
  		WakeLock annotation = executableElement.getAnnotation(WakeLock.class);
  
  		String tag = extractTag(executableElement);
  		Level level = annotation.level();
  		Flag[] flags = annotation.flags();
  
  		JMethod method = codeModelHelper.overrideAnnotatedMethod(executableElement, holder);
  		JBlock previousMethodBody = codeModelHelper.removeBody(method);
  
  		JBlock methodBody = method.body();
  
  		IJExpression levelAndFlags = getClasses().POWER_MANAGER.staticRef(level.name());
  		if (flags.length > 0) {
  			for (Flag flag : flags) {
  				levelAndFlags = levelAndFlags.bor(getClasses().POWER_MANAGER.staticRef(flag.name()));
  			}
  		}
  
  		JInvocation newWakeLock = holder.getPowerManagerRef().invoke("newWakeLock").arg(levelAndFlags).arg(JExpr.lit(tag));
  
  		JVar wakeLock = methodBody.decl(getClasses().WAKE_LOCK, "wakeLock", JExpr._null());
  
  		JTryBlock tryBlock = methodBody._try();
  		tryBlock.body().assign(wakeLock, newWakeLock);
  		tryBlock.body().add(wakeLock.invoke("acquire"));
  		tryBlock.body().add(previousMethodBody);
  
  		JBlock finallyBlock = tryBlock._finally();
  		JConditional ifStatement = finallyBlock._if(wakeLock.ne(JExpr._null()));
  		ifStatement._then().add(wakeLock.invoke("release"));
  	}
  
  	private String extractTag(Element element) {
  		WakeLock annotation = element.getAnnotation(WakeLock.class);
  		String tag = annotation.tag();
  		if (WakeLock.DEFAULT_TAG.equals(tag)) {
  			tag = element.getEnclosingElement().getSimpleName().toString() + "." + element.getSimpleName().toString();
  		}
  		return tag;
  	}
  }
  