问题描述
我正在为我的 REST 应用程序编写 E2E 测试。因此，位于前端的测试调用已部署的后端，除了一个小问题外，它运行得非常好：
当调用接收到的 readEntity 上的 Response 方法时，会发生 java.lang.ArrayStoreException。我的观察表明问题出在自写的约束注释中：
我已经为 Bean-Validation 编写了自己的 Constraint-Annotation @Future，我的 POJO 使用这个 Annotation 来验证 LocalDateTime 是未来的。我还提供了两个简单的接口，用作验证组：
public interface ExistingInstance extends Default {
}
和
public interface NewInstance extends Default {
}
当我在自定义约束注释中使用这些接口之一作为验证组时，如下所示：
public class Book {
@Future(groups=NewInstance.class)
private LocalDateTime validFrom;
private LocalDateTime validTo;
// Getters & Setters...
}
我收到此异常：
java.lang.ArrayStoreException
at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:736)
at sun.reflect.annotation.AnnotationParser.parseArray(AnnotationParser.java:543)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(AnnotationParser.java:367)
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:298)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:132)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:84)
at java.lang.reflect.AccessibleObject.getAnnotationsFromCache(AccessibleObject.java:313)
at java.lang.reflect.Field.declaredAnnotations(Field.java:1167)
at java.lang.reflect.Field.getDeclaredAnnotations(Field.java:1160)
at com.fasterxml.jackson.databind.introspect.AnnotatedFieldCollector._findFields(AnnotatedFieldCollector.java:86)
at com.fasterxml.jackson.databind.introspect.AnnotatedFieldCollector._findFields(AnnotatedFieldCollector.java:71)
at com.fasterxml.jackson.databind.introspect.AnnotatedFieldCollector.collect(AnnotatedFieldCollector.java:48)
at com.fasterxml.jackson.databind.introspect.AnnotatedFieldCollector.collectFields(AnnotatedFieldCollector.java:43)
at com.fasterxml.jackson.databind.introspect.AnnotatedClass._fields(AnnotatedClass.java:371)
at com.fasterxml.jackson.databind.introspect.AnnotatedClass.fields(AnnotatedClass.java:343)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addFields(POJOPropertiesCollector.java:493)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collectAll(POJOPropertiesCollector.java:421)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getPropertyMap(POJOPropertiesCollector.java:386)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getProperties(POJOPropertiesCollector.java:233)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription._properties(BasicBeanDescription.java:164)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription.findProperties(BasicBeanDescription.java:239)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._findCreatorsFromProperties(BasicDeserializerFactory.java:328)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._constructDefaultValueInstantiator(BasicDeserializerFactory.java:272)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory.findValueInstantiator(BasicDeserializerFactory.java:223)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:261)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:150)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:414)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:349)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:558)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.createContextual(CollectionDeserializer.java:188)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.createContextual(CollectionDeserializer.java:28)
at com.fasterxml.jackson.databind.DeserializationContext.handlePrimaryContextualization(DeserializationContext.java:765)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:535)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:293)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:591)
at com.fasterxml.jackson.databind.ObjectReader._prefetchRootDeserializer(ObjectReader.java:2340)
at com.fasterxml.jackson.databind.ObjectReader.forType(ObjectReader.java:723)
at com.fasterxml.jackson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:804)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:233)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:212)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:132)
at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1072)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:885)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:845)
at org.glassfish.jersey.client.ClientResponse.readEntity(ClientResponse.java:340)
at org.glassfish.jersey.client.InboundJaxrsResponse$2.call(InboundJaxrsResponse.java:104)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:205)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:365)
at org.glassfish.jersey.client.InboundJaxrsResponse.runInScopeIfPossible(InboundJaxrsResponse.java:244)
at org.glassfish.jersey.client.InboundJaxrsResponse.readEntity(InboundJaxrsResponse.java:101)
at my.package.structure.books.BooksClient.readEntityFromresponse(BooksClient.java:309)
at my.package.structure.books.BooksClient.getBooks(BooksClient.java:95)
at my.package.structure.books.BooksClientTest.getBooks_Test(BooksClientTest.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:508)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:436)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:170)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor$$Lambda$251.00000000126A8D40.execute(UnkNown Source)
at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:166)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:113)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:58)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.lambda$executeRecursively$3(HierarchicalTestExecutor.java:112)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor$$Lambda$143.000000001120E090.execute(UnkNown Source)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.executeRecursively(HierarchicalTestExecutor.java:108)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.execute(HierarchicalTestExecutor.java:79)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.lambda$executeRecursively$2(HierarchicalTestExecutor.java:120)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor$$Lambda$146.000000001148A600.accept(UnkNown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:195)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:186)
at java.util.Iterator.forEachRemaining(Iterator.java:127)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1812)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:523)
at java.util.stream.AbstractPipeline.wrapAndcopyInto(AbstractPipeline.java:513)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:162)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:185)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:245)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:429)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.lambda$executeRecursively$3(HierarchicalTestExecutor.java:120)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor$$Lambda$143.000000001120E090.execute(UnkNown Source)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.executeRecursively(HierarchicalTestExecutor.java:108)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.execute(HierarchicalTestExecutor.java:79)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.lambda$executeRecursively$2(HierarchicalTestExecutor.java:120)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor$$Lambda$146.000000001148A600.accept(UnkNown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:195)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:186)
at java.util.Iterator.forEachRemaining(Iterator.java:127)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1812)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:523)
at java.util.stream.AbstractPipeline.wrapAndcopyInto(AbstractPipeline.java:513)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:162)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:185)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:245)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:429)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.lambda$executeRecursively$3(HierarchicalTestExecutor.java:120)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor$$Lambda$143.000000001120E090.execute(UnkNown Source)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.executeRecursively(HierarchicalTestExecutor.java:108)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor$NodeExecutor.execute(HierarchicalTestExecutor.java:79)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:55)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
at org.eclipse.jdt.internal.junit5.runner.junit5TestReference.run(junit5TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
现在是令人困惑的部分：
如果我在 Java 提供的现有注释上使用我的验证组接口，例如 @NotNull：
public class Book {
@NotNull(groups=NewInstance.class)
private LocalDateTime validFrom;
private LocalDateTime validTo;
// Getters & Setters...
}
它工作得很好。即使我使用 JDK 中提供的类，例如 Default.class 作为我的自定义注释中的一个组：
public class Book {
@NotNull(groups=Default.class)
private LocalDateTime validFrom;
private LocalDateTime validTo;
// Getters & Setters...
}
有效！
我错过了什么？
我使用：
- Java v8
- JavaEE v7
- 泽西客户端 v2.33
- 泽西HK2 v2.33
- 休眠验证器 v5.4.3
注意：我知道已经提供了注解`@Future`，但是在带有 JavaEE 7 的 Java 8 中它不支持“新的”Time-API。
服务器端： 返回实体的包装
public class Wrapper<T> {
private T returnValue;
private String exception;
private Integer processingState;
private String processingMessage;
//Getter & Setter
}
@Path("books")
public class BookService {
@EJB
private BookRepo repository;
@Path("all")
public Response getAllBooks() {
Response response = null;
try {
// findAll returns a List wrapped inside the above shown Wrapper class
response = Response.status(200).entity(new GenericEntity<Wrapper<List<Book>>>(repository.findAll()){}).build();
} catch (Exception e) {
response = Response.status(500).build();
}
return response;
}
}
客户端：
public class BooksClient {
private ObjectMapper mapper;
private Client client;
private WebTarget baseTarget;
public BooksClient(String endpointAdress) {
this.mapper = new ObjectMapper();
this.mapper.registerModule(new JavaTimeModule());
this.mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS,false);
JacksonjsonProvider provider = new JacksonjsonProvider(this.mapper);
this.client = ClientBuilder.newClient(new ClientConfig().register(provider));
this.baseTarget = this.client.target(endpointAdress);
}
public Wrapper<List<Book>> getBooks() {
WebTarget bookTarget = baseTarget.path("all");
Response response = bookTarget.request(MediaType.APPLICATION_JSON).get();
return this.readEntityFromresponse(response);
}
private Wrapper<List<Book>> readEntityFromresponse(Response response) {
Wrapper<List<Book>> result = null;
GenericType<List<Book>> responseType = new GenericType<Wrapper<List<Book>>>(){};
result = response.readEntity(responseType); // <--- root of Exception
return result;
}
}
测试类
public class BooksClientTest {
@Spy
private BooksClient client = new BooksClient("http://localhost:1234/ws/books");
@Test
public void getBooks_test() {
Wrapper<List<Book>> result = this.client.getBooks();
assertthat(result).isNotNull();
}
}
自定义注释：
/**
* Validates a Time Value.
*/
@Documented
@Retention(RUNTIME)
@Target(FIELD)
@Constraint(validatedBy = { FutureLocalDateTimeValidator.class,FutureLocalDateValidator.class,FutureLocalTimeValidator.class,FuturezoneddatetimeValidator.class })
public @interface Future {
String message() default "Error while validating the date!";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
对应的验证器：
public class FutureLocalDateTimeValidator implements ConstraintValidator<Future,LocalDateTime> {
@Override
public void initialize(Future constraintAnnotation) {
// not needed.
}
@Override
public boolean isValid(LocalDateTime value,ConstraintValidatorContext context) {
if (value == null) {
return true;
}
LocalDateTime today = LocalDateTime.Now();
return value.isAfter(today);
}
}
我尝试了不同的自写注释，结果完全相同。
应用程序部署在 WAS 9.0 上
如果我使用实际的前端，则不会发生错误。
希望这会有所帮助，提前致谢！
解决方法
我找不到确切的版本（行号不匹配），但 the code found on docjar.com 足以解释发生的情况。
private static Object parseClassArray(int length,ByteBuffer buf,ConstantPool constPool,Class<?> container) {
Object[] result = new Class<?>[length];
boolean typeMismatch = false;
int tag = 0;
for (int i = 0; i < length; i++) {
tag = buf.get();
if (tag == 'c') {
result[i] = parseClassValue(buf,constPool,container);
} else {
skipMemberValue(tag,buf);
typeMismatch = true;
}
}
return typeMismatch ? exceptionProxy(tag) : result;
}
private static Object parseClassValue(ByteBuffer buf,Class<?> container) {
int classIndex = buf.getShort() & 0xFFFF;
try {
try {
String sig = constPool.getUTF8At(classIndex);
return parseSig(sig,container);
} catch (IllegalArgumentException ex) {
// support obsolete early jsr175 format class files
return constPool.getClassAt(classIndex);
}
} catch (NoClassDefFoundError e) {
return new TypeNotPresentExceptionProxy("[unknown]",e);
}
catch (TypeNotPresentException e) {
return new TypeNotPresentExceptionProxy(e.typeName(),e.getCause());
}
}
有趣的方面是方法 parseClassValue 并不总是返回 Class<?>；当 NoClassDefFoundError 或 TypeNotPresentException 发生时，它将返回一个 TypeNotPresentExceptionProxy 实例。
由于 parseClassArray 不会检查这个特殊的返回值，而是无条件地将结果存储到 Class<?>[] 数组中，因此可能会出现 ArrayStoreException 。
这显然是一个错误，但它也提供了一个提示，为什么您并不总是遇到这个特定问题（显然，一般来说，开发人员并不多）。
只有在具有 Class 类型数组的注释值中引用了 absent 类型时，才会发生这种情况。因此，您可能会关注在失败的环境中哪种类型不可用的问题。检查这一点的一种方法是在错误的情况下强制提前终止，例如
public class Book {
// now,it will fail at class initialization time if the type is missing
static final Class<?> DUMMY = NewInstance.class;
@Future(groups=NewInstance.class)
private LocalDateTime validFrom;
private LocalDateTime validTo;
// Getters & Setters...
}
我发现了问题。我正在使用
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.4.3.Final</version>
</dependency>
和
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>
根据此answer，这些是不兼容的。
我将版本升级为：
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
现在一切正常。感谢您的帮助！