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BaseTypeAnnotations.java
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251 lines (212 loc) · 8.58 KB
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/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex;
import static org.junit.Assert.fail;
import java.lang.reflect.*;
import org.junit.Test;
import org.reactivestreams.Publisher;
import io.reactivex.annotations.*;
/**
* Verifies several properties.
* <ul>
* <li>Certain public base type methods have the {@link CheckReturnValue} present</li>
* <li>All public base type methods have the {@link SchedulerSupport} present</li>
* <li>All public base type methods which return Flowable have the {@link BackpressureSupport} present</li>
* <li>All public base types that don't return Flowable don't have the {@link BackpressureSupport} present (these are copy-paste errors)</li>
* </ul>
*/
public class BaseTypeAnnotations {
static void checkCheckReturnValueSupport(Class<?> clazz) {
StringBuilder b = new StringBuilder();
for (Method m : clazz.getMethods()) {
if (m.getName().equals("bufferSize")) {
continue;
}
if (m.getDeclaringClass() == clazz) {
boolean isSubscribeMethod = "subscribe".equals(m.getName()) && m.getParameterTypes().length == 0;
boolean isAnnotationPresent = m.isAnnotationPresent(CheckReturnValue.class);
if (isSubscribeMethod) {
if (isAnnotationPresent) {
b.append("subscribe() method has @CheckReturnValue: ").append(m).append("\r\n");
}
continue;
}
if (Modifier.isPrivate(m.getModifiers()) && isAnnotationPresent) {
b.append("Private method has @CheckReturnValue: ").append(m).append("\r\n");
continue;
}
if (m.getReturnType().equals(Void.TYPE)) {
if (isAnnotationPresent) {
b.append("Void method has @CheckReturnValue: ").append(m).append("\r\n");
}
continue;
}
if (!isAnnotationPresent) {
b.append("Missing @CheckReturnValue: ").append(m).append("\r\n");
}
}
}
if (b.length() != 0) {
System.out.println(clazz);
System.out.println("------------------------");
System.out.println(b);
fail(b.toString());
}
}
static void checkSchedulerSupport(Class<?> clazz) {
StringBuilder b = new StringBuilder();
for (Method m : clazz.getMethods()) {
if (m.getName().equals("bufferSize")) {
continue;
}
if (m.getDeclaringClass() == clazz) {
if (!m.isAnnotationPresent(SchedulerSupport.class)) {
b.append("Missing @SchedulerSupport: ").append(m).append("\r\n");
} else {
SchedulerSupport ann = m.getAnnotation(SchedulerSupport.class);
if (ann.value().equals(SchedulerSupport.CUSTOM)) {
boolean found = false;
for (Class<?> paramclazz : m.getParameterTypes()) {
if (Scheduler.class.isAssignableFrom(paramclazz)) {
found = true;
break;
}
}
if (!found) {
b.append("Marked with CUSTOM scheduler but no Scheduler parameter: ").append(m).append("\r\n");
}
} else {
for (Class<?> paramclazz : m.getParameterTypes()) {
if (Scheduler.class.isAssignableFrom(paramclazz)) {
if (!m.getName().equals("timestamp") && !m.getName().equals("timeInterval")) {
b.append("Marked with specific scheduler but Scheduler parameter found: ").append(m).append("\r\n");
break;
}
}
}
}
}
}
}
if (b.length() != 0) {
System.out.println(clazz);
System.out.println("------------------------");
System.out.println(b);
fail(b.toString());
}
}
static void checkBackpressureSupport(Class<?> clazz) {
StringBuilder b = new StringBuilder();
for (Method m : clazz.getMethods()) {
if (m.getName().equals("bufferSize")) {
continue;
}
if (m.getDeclaringClass() == clazz) {
if (clazz == Flowable.class) {
if (!m.isAnnotationPresent(BackpressureSupport.class)) {
b.append("No @BackpressureSupport annotation (being Flowable): ").append(m).append("\r\n");
}
} else {
if (m.getReturnType() == Flowable.class) {
if (!m.isAnnotationPresent(BackpressureSupport.class)) {
b.append("No @BackpressureSupport annotation (having Flowable return): ").append(m).append("\r\n");
}
} else {
boolean found = false;
for (Class<?> paramclazz : m.getParameterTypes()) {
if (Publisher.class.isAssignableFrom(paramclazz)) {
found = true;
break;
}
}
if (found) {
if (!m.isAnnotationPresent(BackpressureSupport.class)) {
b.append("No @BackpressureSupport annotation (has Publisher param): ").append(m).append("\r\n");
}
} else {
if (m.isAnnotationPresent(BackpressureSupport.class)) {
b.append("Unnecessary @BackpressureSupport annotation: ").append(m).append("\r\n");
}
}
}
}
}
}
if (b.length() != 0) {
System.out.println(clazz);
System.out.println("------------------------");
System.out.println(b);
fail(b.toString());
}
}
@Test
public void checkReturnValueFlowable() {
checkCheckReturnValueSupport(Flowable.class);
}
@Test
public void checkReturnValueObservable() {
checkCheckReturnValueSupport(Observable.class);
}
@Test
public void checkReturnValueSingle() {
checkCheckReturnValueSupport(Single.class);
}
@Test
public void checkReturnValueCompletable() {
checkCheckReturnValueSupport(Completable.class);
}
@Test
public void checkReturnValueMaybe() {
checkCheckReturnValueSupport(Maybe.class);
}
@Test
public void schedulerSupportFlowable() {
checkSchedulerSupport(Flowable.class);
}
@Test
public void schedulerSupportObservable() {
checkSchedulerSupport(Observable.class);
}
@Test
public void schedulerSupportSingle() {
checkSchedulerSupport(Single.class);
}
@Test
public void schedulerSupportCompletable() {
checkSchedulerSupport(Completable.class);
}
@Test
public void schedulerSupportMaybe() {
checkSchedulerSupport(Maybe.class);
}
@Test
public void backpressureSupportFlowable() {
checkBackpressureSupport(Flowable.class);
}
@Test
public void backpressureSupportObservable() {
checkBackpressureSupport(Observable.class);
}
@Test
public void backpressureSupportSingle() {
checkBackpressureSupport(Single.class);
}
@Test
public void backpressureSupportCompletable() {
checkBackpressureSupport(Completable.class);
}
@Test
public void backpressureSupportMaybe() {
checkBackpressureSupport(Maybe.class);
}
}