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227 lines (185 loc) · 8.16 KB
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/**
* Copyright (C) 2010-2013 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.processing;
import static com.sun.codemodel.JExpr._null;
import static com.sun.codemodel.JExpr._super;
import static com.sun.codemodel.JExpr._this;
import static com.sun.codemodel.JExpr.cast;
import static com.sun.codemodel.JExpr.invoke;
import static com.sun.codemodel.JExpr.lit;
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 static org.androidannotations.helper.CanonicalNameConstants.PARCELABLE;
import static org.androidannotations.helper.CanonicalNameConstants.SERIALIZABLE;
import static org.androidannotations.helper.CanonicalNameConstants.STRING;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import org.androidannotations.annotations.Extra;
import org.androidannotations.helper.APTCodeModelHelper;
import org.androidannotations.helper.CaseHelper;
import org.androidannotations.processing.EBeansHolder.Classes;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JCatchBlock;
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.JPrimitiveType;
import com.sun.codemodel.JTryBlock;
import com.sun.codemodel.JType;
import com.sun.codemodel.JTypeVar;
import com.sun.codemodel.JVar;
public class ExtraProcessor implements DecoratingElementProcessor {
private final APTCodeModelHelper helper = new APTCodeModelHelper();
private final ProcessingEnvironment processingEnv;
public ExtraProcessor(ProcessingEnvironment processingEnv) {
this.processingEnv = processingEnv;
}
@Override
public String getTarget() {
return Extra.class.getName();
}
@Override
public void process(Element element, JCodeModel codeModel, EBeanHolder holder) {
Extra annotation = element.getAnnotation(Extra.class);
String extraKey = annotation.value();
String fieldName = element.getSimpleName().toString();
if (extraKey.isEmpty()) {
extraKey = fieldName;
}
TypeMirror elementType = element.asType();
boolean isPrimitive = elementType.getKind().isPrimitive();
Classes classes = holder.classes();
if (!isPrimitive && holder.cast == null) {
generateCastMethod(codeModel, holder);
}
if (holder.extras == null) {
injectExtras(holder, codeModel);
}
String staticFieldName;
if (fieldName.endsWith("Extra")) {
staticFieldName = CaseHelper.camelCaseToUpperSnakeCase(fieldName);
} else {
staticFieldName = CaseHelper.camelCaseToUpperSnakeCase(fieldName + "Extra");
}
JFieldVar extraKeyField = holder.generatedClass.field(PUBLIC | STATIC | FINAL, classes.STRING, staticFieldName, lit(extraKey));
JBlock ifContainsKey = holder.extrasNotNullBlock._if(JExpr.invoke(holder.extras, "containsKey").arg(extraKeyField))._then();
JTryBlock containsKeyTry = ifContainsKey._try();
JFieldRef extraField = JExpr.ref(fieldName);
if (isPrimitive) {
JPrimitiveType primitiveType = JType.parse(codeModel, elementType.toString());
JClass wrapperType = primitiveType.boxify();
containsKeyTry.body().assign(extraField, JExpr.cast(wrapperType, holder.extras.invoke("get").arg(extraKeyField)));
} else {
containsKeyTry.body().assign(extraField, JExpr.invoke(holder.cast).arg(holder.extras.invoke("get").arg(extraKeyField)));
}
JCatchBlock containsKeyCatch = containsKeyTry._catch(classes.CLASS_CAST_EXCEPTION);
JVar exceptionParam = containsKeyCatch.param("e");
JInvocation logError = classes.LOG.staticInvoke("e");
logError.arg(holder.generatedClass.name());
logError.arg("Could not cast extra to expected type, the field is left to its default value");
logError.arg(exceptionParam);
containsKeyCatch.body().add(logError);
/*
* holder.intentBuilderClass may be null if the annotated component is
* an abstract activity
*/
if (holder.intentBuilderClass != null) {
{
// flags()
JMethod method = holder.intentBuilderClass.method(PUBLIC, holder.intentBuilderClass, fieldName);
boolean castToSerializable = false;
boolean castToParcelable = false;
TypeMirror extraType = elementType;
if (extraType.getKind() == TypeKind.DECLARED) {
Elements elementUtils = processingEnv.getElementUtils();
Types typeUtils = processingEnv.getTypeUtils();
TypeMirror parcelableType = elementUtils.getTypeElement(PARCELABLE).asType();
if (!typeUtils.isSubtype(extraType, parcelableType)) {
TypeMirror stringType = elementUtils.getTypeElement(STRING).asType();
if (!typeUtils.isSubtype(extraType, stringType)) {
castToSerializable = true;
}
} else {
TypeMirror serializableType = elementUtils.getTypeElement(SERIALIZABLE).asType();
if (typeUtils.isSubtype(extraType, serializableType)) {
castToParcelable = true;
}
}
}
JClass paramClass = helper.typeMirrorToJClass(extraType, holder);
JVar extraParam = method.param(paramClass, fieldName);
JBlock body = method.body();
JInvocation invocation = body.invoke(holder.intentField, "putExtra").arg(extraKeyField);
if (castToSerializable) {
invocation.arg(cast(classes.SERIALIZABLE, extraParam));
} else if (castToParcelable) {
invocation.arg(cast(classes.PARCELABLE, extraParam));
} else {
invocation.arg(extraParam);
}
body._return(_this());
}
}
}
private void generateCastMethod(JCodeModel codeModel, EBeanHolder holder) {
JType objectType = codeModel._ref(Object.class);
JMethod method = holder.generatedClass.method(JMod.PRIVATE, objectType, "cast_");
JTypeVar genericType = method.generify("T");
method.type(genericType);
JVar objectParam = method.param(objectType, "object");
method.annotate(SuppressWarnings.class).param("value", "unchecked");
method.body()._return(JExpr.cast(genericType, objectParam));
holder.cast = method;
}
/**
* Adds call to injectExtras_() in onCreate and setIntent() methods.
*/
private void injectExtras(EBeanHolder holder, JCodeModel codeModel) {
Classes classes = holder.classes();
JMethod injectExtrasMethod = holder.generatedClass.method(PRIVATE, codeModel.VOID, "injectExtras_");
overrideSetIntent(holder, codeModel, injectExtrasMethod);
injectExtrasOnInit(holder, classes.INTENT, injectExtrasMethod);
JBlock injectExtrasBody = injectExtrasMethod.body();
JVar intent = injectExtrasBody.decl(classes.INTENT, "intent_", invoke("getIntent"));
holder.extras = injectExtrasBody.decl(classes.BUNDLE, "extras_");
holder.extras.init(intent.invoke("getExtras"));
holder.extrasNotNullBlock = injectExtrasBody._if(holder.extras.ne(_null()))._then();
}
private void overrideSetIntent(EBeanHolder holder, JCodeModel codeModel, JMethod initIntentMethod) {
if (holder.intentBuilderClass != null) {
JMethod setIntentMethod = holder.generatedClass.method(PUBLIC, codeModel.VOID, "setIntent");
setIntentMethod.annotate(Override.class);
JVar methodParam = setIntentMethod.param(holder.classes().INTENT, "newIntent");
JBlock setIntentBody = setIntentMethod.body();
setIntentBody.invoke(_super(), setIntentMethod).arg(methodParam);
setIntentBody.invoke(initIntentMethod);
}
}
private void injectExtrasOnInit(EBeanHolder holder, JClass intentClass, JMethod injectExtrasMethod) {
holder.initBody.invoke(injectExtrasMethod);
}
}