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/**
* Copyright (C) 2010-2011 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 com.googlecode.androidannotations.processing;
import static com.googlecode.androidannotations.helper.GreenDroidConstants.GREENDROID_ACTIVITIES_LIST_CLASS;
import static com.sun.codemodel.JExpr._new;
import static com.sun.codemodel.JExpr._this;
import static com.sun.codemodel.JMod.FINAL;
import static com.sun.codemodel.JMod.PRIVATE;
import static com.sun.codemodel.JMod.PUBLIC;
import static com.sun.codemodel.JMod.STATIC;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.util.ElementFilter;
import com.googlecode.androidannotations.annotations.EActivity;
import com.googlecode.androidannotations.annotations.Id;
import com.googlecode.androidannotations.api.SdkVersionHelper;
import com.googlecode.androidannotations.helper.AnnotationHelper;
import com.googlecode.androidannotations.helper.ModelConstants;
import com.googlecode.androidannotations.rclass.IRClass;
import com.googlecode.androidannotations.rclass.IRClass.Res;
import com.googlecode.androidannotations.rclass.IRInnerClass;
import com.sun.codemodel.ClassType;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JFieldRef;
import com.sun.codemodel.JFieldVar;
import com.sun.codemodel.JInvocation;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JMod;
import com.sun.codemodel.JType;
import com.sun.codemodel.JVar;
public class EActivityProcessor implements ElementProcessor {
private final IRClass rClass;
private List<TypeElement> greendroidActivityElements;
private final AnnotationHelper annotationHelper;
private final ProcessingEnvironment processingEnv;
public EActivityProcessor(ProcessingEnvironment processingEnv, IRClass rClass) {
this.processingEnv = processingEnv;
annotationHelper = new AnnotationHelper(processingEnv);
this.rClass = rClass;
greendroidActivityElements = new ArrayList<TypeElement>();
for (String greendroidActivityName : GREENDROID_ACTIVITIES_LIST_CLASS) {
TypeElement typeElement = annotationHelper.typeElementFromQualifiedName(greendroidActivityName);
if (typeElement != null) {
greendroidActivityElements.add(typeElement);
}
}
}
@Override
public Class<? extends Annotation> getTarget() {
return EActivity.class;
}
@Override
public void process(Element element, JCodeModel codeModel, EBeansHolder activitiesHolder) throws Exception {
EBeanHolder holder = activitiesHolder.create(element);
TypeElement typeElement = (TypeElement) element;
// Activity
String annotatedActivityQualifiedName = typeElement.getQualifiedName().toString();
String subActivityQualifiedName = annotatedActivityQualifiedName + ModelConstants.GENERATION_SUFFIX;
boolean usesGreenDroid = usesGreenDroid(typeElement);
int modifiers;
boolean isAbstract = element.getModifiers().contains(Modifier.ABSTRACT);
if (isAbstract) {
modifiers = JMod.PUBLIC | JMod.ABSTRACT;
} else {
modifiers = JMod.PUBLIC | JMod.FINAL;
}
holder.eBean = codeModel._class(modifiers, subActivityQualifiedName, ClassType.CLASS);
JClass annotatedActivity = codeModel.directClass(annotatedActivityQualifiedName);
holder.eBean._extends(annotatedActivity);
holder.contextRef = _this();
// onCreate
int onCreateVisibility;
if (isAbstract) {
onCreateVisibility = inheritedOnCreateVisibility(typeElement);
} else {
onCreateVisibility = PUBLIC;
}
JMethod onCreate = holder.eBean.method(onCreateVisibility, codeModel.VOID, "onCreate");
onCreate.annotate(Override.class);
JClass bundleClass = holder.refClass("android.os.Bundle");
// beforeSetContentView
holder.init = holder.eBean.method(PRIVATE, codeModel.VOID, "init_");
holder.beforeCreateSavedInstanceStateParam = holder.init.param(bundleClass, "savedInstanceState");
{
// init if activity
holder.initIfActivityBody = holder.init.body();
holder.initActivityRef = _this();
}
// afterSetContentView
holder.afterSetContentView = holder.eBean.method(PRIVATE, codeModel.VOID, "afterSetContentView_");
JVar onCreateSavedInstanceState = onCreate.param(bundleClass, "savedInstanceState");
JBlock onCreateBody = onCreate.body();
onCreateBody.invoke(holder.init).arg(onCreateSavedInstanceState);
onCreateBody.invoke(JExpr._super(), onCreate).arg(onCreateSavedInstanceState);
EActivity layoutAnnotation = element.getAnnotation(EActivity.class);
int layoutIdValue = layoutAnnotation.value();
JFieldRef contentViewId;
if (layoutIdValue != Id.DEFAULT_VALUE) {
IRInnerClass rInnerClass = rClass.get(Res.LAYOUT);
contentViewId = rInnerClass.getIdStaticRef(layoutIdValue, holder);
} else {
contentViewId = null;
}
if (contentViewId != null) {
// GreenDroid support
if (usesGreenDroid) {
onCreateBody.invoke("setActionBarContentView").arg(contentViewId);
} else {
onCreateBody.invoke("setContentView").arg(contentViewId);
}
}
// Overriding setContentView (with layout id param)
JClass viewClass = holder.refClass("android.view.View");
JClass layoutParamsClass = holder.refClass("android.view.ViewGroup.LayoutParams");
String setContentViewMethodName;
if (usesGreenDroid) {
setContentViewMethodName = "setActionBarContentView";
} else {
setContentViewMethodName = "setContentView";
}
setContentViewMethod(setContentViewMethodName, codeModel, holder, new JType[] { codeModel.INT }, new String[] { "layoutResID" });
setContentViewMethod(setContentViewMethodName, codeModel, holder, new JType[] { viewClass, layoutParamsClass }, new String[] { "view", "params" });
setContentViewMethod(setContentViewMethodName, codeModel, holder, new JType[] { viewClass }, new String[] { "view" });
// Handling onBackPressed
if (hasOnBackPressedMethod(typeElement)) {
JMethod onKeyDownMethod = holder.eBean.method(PUBLIC, codeModel.BOOLEAN, "onKeyDown");
onKeyDownMethod.annotate(Override.class);
JVar keyCodeParam = onKeyDownMethod.param(codeModel.INT, "keyCode");
JClass keyEventClass = holder.refClass("android.view.KeyEvent");
JVar eventParam = onKeyDownMethod.param(keyEventClass, "event");
JClass versionHelperClass = codeModel.ref(SdkVersionHelper.class);
JInvocation sdkInt = versionHelperClass.staticInvoke("getSdkInt");
JBlock onKeyDownBody = onKeyDownMethod.body();
onKeyDownBody._if( //
sdkInt.lt(JExpr.lit(5)) //
.cand(keyCodeParam.eq(keyEventClass.staticRef("KEYCODE_BACK"))) //
.cand(eventParam.invoke("getRepeatCount").eq(JExpr.lit(0)))) //
._then() //
.invoke("onBackPressed");
onKeyDownBody._return( //
JExpr._super().invoke(onKeyDownMethod) //
.arg(keyCodeParam) //
.arg(eventParam));
}
if (!isAbstract) {
JClass contextClass = holder.refClass("android.content.Context");
JClass intentClass = holder.refClass("android.content.Intent");
{
holder.intentBuilderClass = holder.eBean._class(PUBLIC | STATIC, "IntentBuilder_");
JFieldVar contextField = holder.intentBuilderClass.field(PRIVATE, contextClass, "context_");
holder.intentField = holder.intentBuilderClass.field(PRIVATE | FINAL, intentClass, "intent_");
{
// Constructor
JMethod constructor = holder.intentBuilderClass.constructor(JMod.PUBLIC);
JVar constructorContextParam = constructor.param(contextClass, "context");
JBlock constructorBody = constructor.body();
constructorBody.assign(contextField, constructorContextParam);
constructorBody.assign(holder.intentField, _new(intentClass).arg(constructorContextParam).arg(holder.eBean.dotclass()));
}
{
// get()
JMethod method = holder.intentBuilderClass.method(PUBLIC, intentClass, "get");
method.body()._return(holder.intentField);
}
{
// flags()
JMethod method = holder.intentBuilderClass.method(PUBLIC, holder.intentBuilderClass, "flags");
JVar flagsParam = method.param(codeModel.INT, "flags");
JBlock body = method.body();
body.invoke(holder.intentField, "setFlags").arg(flagsParam);
body._return(_this());
}
{
// start
JMethod method = holder.intentBuilderClass.method(PUBLIC, codeModel.VOID, "start");
method.body().invoke(contextField, "startActivity").arg(holder.intentField);
}
{
// intent()
JMethod method = holder.eBean.method(STATIC | PUBLIC, holder.intentBuilderClass, "intent");
JVar contextParam = method.param(contextClass, "context");
method.body()._return(_new(holder.intentBuilderClass).arg(contextParam));
}
}
}
}
private void setContentViewMethod(String setContentViewMethodName, JCodeModel codeModel, EBeanHolder holder, JType[] paramTypes, String[] paramNames) {
JMethod method = holder.eBean.method(JMod.PUBLIC, codeModel.VOID, setContentViewMethodName);
method.annotate(Override.class);
ArrayList<JVar> params = new ArrayList<JVar>();
for (int i = 0; i < paramTypes.length; i++) {
JVar param = method.param(paramTypes[i], paramNames[i]);
params.add(param);
}
JBlock body = method.body();
JInvocation superCall = body.invoke(JExpr._super(), method);
for (JVar arg : params) {
superCall.arg(arg);
}
body.invoke(holder.afterSetContentView);
}
private int inheritedOnCreateVisibility(TypeElement activityElement) {
List<? extends Element> allMembers = annotationHelper.getElementUtils().getAllMembers(activityElement);
List<ExecutableElement> activityInheritedMethods = ElementFilter.methodsIn(allMembers);
for (ExecutableElement activityInheritedMethod : activityInheritedMethods) {
if (isOnCreateMethod(activityInheritedMethod)) {
Set<Modifier> modifiers = activityInheritedMethod.getModifiers();
for (Modifier modifier : modifiers) {
if (modifier == Modifier.PUBLIC) {
return JMod.PUBLIC;
} else if (modifier == Modifier.PROTECTED) {
return JMod.PROTECTED;
}
}
return JMod.PUBLIC;
}
}
return PUBLIC;
}
private boolean isOnCreateMethod(ExecutableElement method) {
List<? extends VariableElement> parameters = method.getParameters();
return method.getSimpleName().toString().equals("onCreate") //
&& parameters.size() == 1 //
&& parameters.get(0).asType().toString().equals("android.os.Bundle") //
;
}
private boolean hasOnBackPressedMethod(TypeElement activityElement) {
List<? extends Element> allMembers = annotationHelper.getElementUtils().getAllMembers(activityElement);
List<ExecutableElement> activityInheritedMethods = ElementFilter.methodsIn(allMembers);
for (ExecutableElement activityInheritedMethod : activityInheritedMethods) {
if (isOnBackPressedMethod(activityInheritedMethod)) {
return true;
}
}
return false;
}
private boolean isOnBackPressedMethod(ExecutableElement method) {
return method.getSimpleName().toString().equals("onBackPressed") //
&& method.getThrownTypes().size() == 0 //
&& method.getModifiers().contains(Modifier.PUBLIC) //
&& method.getReturnType().getKind().equals(TypeKind.VOID) //
&& method.getParameters().size() == 0 //
;
}
private boolean usesGreenDroid(TypeElement typeElement) {
for (TypeElement greendroidActivityElement : greendroidActivityElements) {
if (processingEnv.getTypeUtils().isSubtype(typeElement.asType(), greendroidActivityElement.asType())) {
return true;
}
}
return false;
}
}