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/*
* Copyright (C) 2015 The Android Open Source 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 android.databinding.tool.reflection.annotation;
import android.databinding.Bindable;
import android.databinding.tool.reflection.ModelClass;
import android.databinding.tool.reflection.ModelMethod;
import android.databinding.tool.reflection.SdkUtil;
import android.databinding.tool.reflection.TypeUtil;
import java.util.List;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
class AnnotationMethod extends ModelMethod {
final ExecutableType mMethod;
final DeclaredType mDeclaringType;
final ExecutableElement mExecutableElement;
int mApiLevel = -1; // calculated on demand
ModelClass mReceiverType;
public AnnotationMethod(DeclaredType declaringType, ExecutableElement executableElement) {
mDeclaringType = declaringType;
mExecutableElement = executableElement;
Types typeUtils = AnnotationAnalyzer.get().getTypeUtils();
mMethod = (ExecutableType) typeUtils.asMemberOf(declaringType, executableElement);
}
@Override
public ModelClass getDeclaringClass() {
if (mReceiverType == null) {
mReceiverType = findReceiverType(mDeclaringType);
if (mReceiverType == null) {
mReceiverType = new AnnotationClass(mDeclaringType);
}
}
return mReceiverType;
}
// TODO: When going to Java 1.8, use mExecutableElement.getReceiverType()
private ModelClass findReceiverType(DeclaredType subType) {
List<? extends TypeMirror> supers = getTypeUtils().directSupertypes(subType);
for (TypeMirror superType : supers) {
if (superType.getKind() == TypeKind.DECLARED) {
DeclaredType declaredType = (DeclaredType) superType;
ModelClass inSuper = findReceiverType(declaredType);
if (inSuper != null) {
return inSuper;
} else if (hasExecutableMethod(declaredType)) {
return new AnnotationClass(declaredType);
}
}
}
return null;
}
private boolean hasExecutableMethod(DeclaredType declaredType) {
Elements elementUtils = getElementUtils();
TypeElement enclosing = (TypeElement) mExecutableElement.getEnclosingElement();
TypeElement typeElement = (TypeElement) declaredType.asElement();
for (Element element : typeElement.getEnclosedElements()) {
if (element.getKind() == ElementKind.METHOD) {
ExecutableElement executableElement = (ExecutableElement) element;
if (executableElement.equals(mExecutableElement) ||
elementUtils.overrides(mExecutableElement, executableElement, enclosing)) {
return true;
}
}
}
return false;
}
@Override
public ModelClass[] getParameterTypes() {
List<? extends TypeMirror> parameters = mMethod.getParameterTypes();
ModelClass[] parameterTypes = new ModelClass[parameters.size()];
for (int i = 0; i < parameters.size(); i++) {
parameterTypes[i] = new AnnotationClass(parameters.get(i));
}
return parameterTypes;
}
@Override
public String getName() {
return mExecutableElement.getSimpleName().toString();
}
@Override
public ModelClass getReturnType(List<ModelClass> args) {
TypeMirror returnType = mMethod.getReturnType();
// TODO: support argument-supplied types
// for example: public T[] toArray(T[] arr)
return new AnnotationClass(returnType);
}
@Override
public boolean isVoid() {
return mMethod.getReturnType().getKind() == TypeKind.VOID;
}
@Override
public boolean isPublic() {
return mExecutableElement.getModifiers().contains(Modifier.PUBLIC);
}
@Override
public boolean isStatic() {
return mExecutableElement.getModifiers().contains(Modifier.STATIC);
}
@Override
public boolean isAbstract() {
return mExecutableElement.getModifiers().contains(Modifier.ABSTRACT);
}
@Override
public boolean isBindable() {
return mExecutableElement.getAnnotation(Bindable.class) != null;
}
@Override
public int getMinApi() {
if (mApiLevel == -1) {
mApiLevel = SdkUtil.getMinApi(this);
}
return mApiLevel;
}
@Override
public String getJniDescription() {
return TypeUtil.getInstance().getDescription(this);
}
@Override
public boolean isVarArgs() {
return mExecutableElement.isVarArgs();
}
private static Types getTypeUtils() {
return AnnotationAnalyzer.get().mProcessingEnv.getTypeUtils();
}
private static Elements getElementUtils() {
return AnnotationAnalyzer.get().mProcessingEnv.getElementUtils();
}
@Override
public String toString() {
return "AnnotationMethod{" +
"mMethod=" + mMethod +
", mDeclaringType=" + mDeclaringType +
", mExecutableElement=" + mExecutableElement +
", mApiLevel=" + mApiLevel +
'}';
}
}
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