Major - P3 When trying to decode a complex object using the AutomaticPojoCodec, the following error happens:
org.bson.codecs.configuration.CodecConfigurationException: An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'ReqIF' failed with the following exception: Failed to decode 'coreContent'. Failed to decode 'reqIF_content'. Failed to decode 'datatypes'. Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception: null A custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type.A custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.AutomaticPojoCodec.decode(AutomaticPojoCodec.java:40) at com.mongodb.operation.CommandResultArrayCodec.decode(CommandResultArrayCodec.java:52) at com.mongodb.operation.CommandResultDocumentCodec.readValue(CommandResultDocumentCodec.java:60) at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:84) at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:41) at org.bson.codecs.configuration.LazyCodec.decode(LazyCodec.java:47) at org.bson.codecs.BsonDocumentCodec.readValue(BsonDocumentCodec.java:101) at com.mongodb.operation.CommandResultDocumentCodec.readValue(CommandResultDocumentCodec.java:63) at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:84) at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:41) at com.mongodb.connection.ReplyMessage.<init>(ReplyMessage.java:50) at com.mongodb.connection.CommandProtocol.getResponseDocument(CommandProtocol.java:132) at com.mongodb.connection.CommandProtocol.execute(CommandProtocol.java:111) at com.mongodb.connection.DefaultServer$DefaultServerProtocolExecutor.execute(DefaultServer.java:159) at com.mongodb.connection.DefaultServerConnection.executeProtocol(DefaultServerConnection.java:289) at com.mongodb.connection.DefaultServerConnection.command(DefaultServerConnection.java:176) at com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol(CommandOperationHelper.java:216) at com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol(CommandOperationHelper.java:207) at com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol(CommandOperationHelper.java:113) at com.mongodb.operation.FindOperation$1.call(FindOperation.java:715) at com.mongodb.operation.FindOperation$1.call(FindOperation.java:709) at com.mongodb.operation.OperationHelper.withConnectionSource(OperationHelper.java:433) at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:406) at com.mongodb.operation.FindOperation.execute(FindOperation.java:709) at com.mongodb.operation.FindOperation.execute(FindOperation.java:81) at com.mongodb.Mongo.execute(Mongo.java:810) at com.mongodb.Mongo$2.execute(Mongo.java:797) at com.mongodb.OperationIterable.iterator(OperationIterable.java:47) at com.mongodb.FindIterableImpl.iterator(FindIterableImpl.java:200) at com.mongodb.FindIterableImpl.iterator(FindIterableImpl.java:37) at io.cesonia.camelot.knight.reqIF.mongoDB.ReqIF_MongoDB_Reader.findByAddress(ReqIF_MongoDB_Reader.java:43) at io.cesonia.camelot.knight.reqIF.mongoDB.ReqIF_MongoDB_Reader.readReqIF_DataFromMongoDB(ReqIF_MongoDB_Reader.java:29) at io.cesonia.camelot.knight.reqIF.mongoDB.ReqIF_MongoDB_ReaderTest.readReqIF_DataFromMongoDB_shouldReturnReqIF_dataObject(ReqIF_MongoDB_ReaderTest.java:49) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:205) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:201) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.util.ArrayList.forEach(Unknown Source) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.util.ArrayList.forEach(Unknown Source) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:141) at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:89) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210) Caused by: org.bson.codecs.configuration.CodecConfigurationException: Failed to decode 'coreContent'. Failed to decode 'reqIF_content'. Failed to decode 'datatypes'. Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception:nullA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:173) at org.bson.codecs.pojo.PojoCodecImpl.decodeProperties(PojoCodecImpl.java:149) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:103) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:107) at org.bson.codecs.pojo.AutomaticPojoCodec.decode(AutomaticPojoCodec.java:37) ... 97 more Caused by: org.bson.codecs.configuration.CodecConfigurationException: Failed to decode 'reqIF_content'. Failed to decode 'datatypes'. Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception:nullA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:173) at org.bson.codecs.pojo.PojoCodecImpl.decodeProperties(PojoCodecImpl.java:149) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:103) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:107) at org.bson.codecs.pojo.LazyPojoCodec.decode(LazyPojoCodec.java:55) at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:93) at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:165) ... 101 more Caused by: org.bson.codecs.configuration.CodecConfigurationException: Failed to decode 'datatypes'. Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception:nullA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:173) at org.bson.codecs.pojo.PojoCodecImpl.decodeProperties(PojoCodecImpl.java:149) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:103) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:107) at org.bson.codecs.pojo.LazyPojoCodec.decode(LazyPojoCodec.java:55) at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:93) at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:165) ... 107 more Caused by: org.bson.codecs.configuration.CodecConfigurationException: Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception:nullA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:173) at org.bson.codecs.pojo.PojoCodecImpl.decodeProperties(PojoCodecImpl.java:149) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:103) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:107) at org.bson.codecs.pojo.LazyPojoCodec.decode(LazyPojoCodec.java:55) at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:93) at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:165) ... 113 more Caused by: org.bson.codecs.configuration.CodecConfigurationException: An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception:nullA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type. at org.bson.codecs.pojo.AutomaticPojoCodec.decode(AutomaticPojoCodec.java:40) at org.bson.codecs.pojo.CollectionCodec.decode(CollectionCodec.java:53) at org.bson.codecs.pojo.CollectionCodec.decode(CollectionCodec.java:30) at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:93) at org.bson.codecs.pojo.PojoCodecImpl.decodePropertyModel(PojoCodecImpl.java:165) ... 119 more Caused by: org.bson.codecs.configuration.CodecConfigurationException at org.bson.codecs.pojo.CreatorExecutable.getInstance(CreatorExecutable.java:89) at org.bson.codecs.pojo.InstanceCreatorImpl.<init>(InstanceCreatorImpl.java:40) at org.bson.codecs.pojo.InstanceCreatorFactoryImpl.create(InstanceCreatorFactoryImpl.java:28) at org.bson.codecs.pojo.ClassModel.getInstanceCreator(ClassModel.java:70) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:102) at org.bson.codecs.pojo.PojoCodecImpl.decode(PojoCodecImpl.java:107) at org.bson.codecs.pojo.AutomaticPojoCodec.decode(AutomaticPojoCodec.java:37) ... 123 more Caused by: java.lang.InstantiationException at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.bson.codecs.pojo.CreatorExecutable.getInstance(CreatorExecutable.java:84) ... 129 more
My main issue here is this part:
Decoding into a 'DatatypeDefinitionTag' failed with the following exception: null
At this place, a comprehensive messafe should be displayed, detailling why the decoding failed. However, in this case, this message is not displayed.
Following the stack trace to the end reveals this possible clue:
Caused by: java.lang.InstantiationException at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.bson.codecs.pojo.CreatorExecutable.getInstance(CreatorExecutable.java:84)
Since in my data model, the faulting class "DatatypeDefinitionTag" is an abstract class that is used like this in the parent class Datatypes:
List<DatatypeDefinitionTag> datatypeDefinitions
...where the elements that fill that list are members of the following classes:
public class DatatypeDefinitionString extends DatatypeDefinitionTag public class DatatypeDefinitionInt extends DatatypeDefinitionTag public class DatatypeDefinitionDate extends DatatypeDefinitionTag
...I could imagine that the actual issue is that the automatic decoder can't extract it since DatatypeDefinitionTag is an abstract class, and a custom codec is required to decode it.
In which case, the error message that appears in this place should read something like this:
org.bson.codecs.configuration.CodecConfigurationException: An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'ReqIF' failed with the following exception: Failed to decode 'coreContent'. Failed to decode 'reqIF_content'. Failed to decode 'datatypes'. Failed to decode 'datatypeDefinitions'. An exception occurred when decoding using the AutomaticPojoCodec. Decoding into a 'DatatypeDefinitionTag' failed with the following exception: Abstract classes are not supported A custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type