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Resolves FasterXML#3853 by adding support for strict handling of type information when deserializing into a registered subtype.
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src/test/java/com/fasterxml/jackson/databind/jsontype/StrictJsonTypeInfoHandlingTest.java
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| package com.fasterxml.jackson.databind.jsontype; | ||
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| import com.fasterxml.jackson.annotation.JsonTypeInfo; | ||
| import com.fasterxml.jackson.annotation.JsonTypeInfo.Id; | ||
| import com.fasterxml.jackson.annotation.JsonTypeName; | ||
| import com.fasterxml.jackson.databind.BaseMapTest; | ||
| import com.fasterxml.jackson.databind.MapperFeature; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.fasterxml.jackson.databind.exc.InvalidTypeIdException; | ||
| import com.fasterxml.jackson.databind.json.JsonMapper; | ||
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| public class StrictJsonTypeInfoHandlingTest extends BaseMapTest { | ||
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| @JsonTypeInfo(use = Id.NAME) | ||
| interface Command { | ||
| } | ||
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| @JsonTypeName("do-something") | ||
| static class DoSomethingCommand implements Command { | ||
| } | ||
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| public void testDefaultNonStrictTypeHandling() throws Exception { | ||
| ObjectMapper om = new ObjectMapper(); | ||
| om.registerSubtypes(DoSomethingCommand.class); | ||
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| // This should pass in all scenarios | ||
| verifyDeserializationWithFullTypeInfo(om); | ||
| // and throw an exception if the target was a super-type in all cases | ||
| verifyInvalidTypeIdWithSuperclassTarget(om); | ||
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| // Default is to allow the deserialization without a type if the target | ||
| // is a concrete sub-type | ||
| verifyDeserializationWithConcreteTarget(om); | ||
| } | ||
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| public void testExplicitNonStrictTypeHandling() throws Exception { | ||
| ObjectMapper om = JsonMapper.builder().disable(MapperFeature.STRICT_TYPE_ID_HANDLING).build(); | ||
| om.registerSubtypes(DoSomethingCommand.class); | ||
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| // This should pass in all scenarios | ||
| verifyDeserializationWithFullTypeInfo(om); | ||
| // and throw an exception if the target was a super-type in all cases | ||
| verifyInvalidTypeIdWithSuperclassTarget(om); | ||
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| // Default is to allow the deserialization without a type if the target | ||
| // is a concrete sub-type | ||
| verifyDeserializationWithConcreteTarget(om); | ||
| } | ||
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| public void testStrictTypeHandling() throws Exception { | ||
| ObjectMapper om = JsonMapper.builder().enable(MapperFeature.STRICT_TYPE_ID_HANDLING).build(); | ||
| om.registerSubtypes(DoSomethingCommand.class); | ||
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| // This should pass in all scenarios | ||
| verifyDeserializationWithFullTypeInfo(om); | ||
| // and throw an exception if the target was a super-type in all cases | ||
| verifyInvalidTypeIdWithSuperclassTarget(om); | ||
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| // With strict mode enabled, fail if there's no type information on the | ||
| // JSON | ||
| verifyInvalidTypeIdWithConcreteTarget(om); | ||
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| } | ||
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| private void verifyInvalidTypeIdWithSuperclassTarget(ObjectMapper om) throws Exception { | ||
| try { | ||
| om.readValue("{}", Command.class); | ||
| fail("Should not pass"); | ||
| } catch (InvalidTypeIdException e) { | ||
| verifyException(e, "missing type id property '@type'"); | ||
| } | ||
| } | ||
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| private void verifyInvalidTypeIdWithConcreteTarget(ObjectMapper om) throws Exception { | ||
| try { | ||
| om.readValue("{}", DoSomethingCommand.class); | ||
| fail("Should not pass"); | ||
| } catch (InvalidTypeIdException e) { | ||
| verifyException(e, "missing type id property '@type'"); | ||
| } | ||
| } | ||
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| private void verifyDeserializationWithConcreteTarget(ObjectMapper om) throws Exception { | ||
| DoSomethingCommand cmd = om.readValue("{}", DoSomethingCommand.class); | ||
| assertType(cmd, DoSomethingCommand.class); | ||
| } | ||
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| private void verifyDeserializationWithFullTypeInfo(ObjectMapper om) throws Exception { | ||
| Command cmd = om.readValue("{\"@type\":\"do-something\"}", Command.class); | ||
| assertType(cmd, DoSomethingCommand.class); | ||
| cmd = om.readValue("{\"@type\":\"do-something\"}", DoSomethingCommand.class); | ||
| assertType(cmd, DoSomethingCommand.class); | ||
| } | ||
| } |