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RxJava/src/test/java/io/reactivex/BaseTypeAnnotations.java at 2.x · hemanthgit/RxJava · GitHub
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BaseTypeAnnotations.java
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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
);
}
}
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