Package overit.geocall.model.format

Class StringDeserializationProblemHandler

java.lang.Object

com.fasterxml.jackson.databind.deser.DeserializationProblemHandler

overit.geocall.model.format.StringDeserializationProblemHandler

public class StringDeserializationProblemHandler
extends DeserializationProblemHandler

Custom problem handler for Jackson deserialization that handles the case where an array is encountered when expecting a String value.

This handler converts arrays to comma-separated strings, which is particularly useful for resolving deserialization issues in DynOHandlerMethodArgumentResolver when query parameters containing commas are processed.

Use case: When a query parameter like name=John,Doe is processed, it gets converted to an array ["John", "Doe"] due to comma detection. This handler automatically converts such arrays back to "John,Doe" when deserializing into String fields.

Behavior:

• Arrays like ["value1", "value2", "value3"] become "value1,value2,value3"
• Single-element arrays like ["singleValue"] become "singleValue"
• Empty arrays [] become empty strings ""
• Arrays with null values are handled gracefully (nulls become empty strings)
• If conversion fails, Jackson falls back to the original error message

Activation: This handler is only active when patch PATCH_190925 is enabled. See Patches.PATCH_190925 for more details.

Since:

13.0

See Also:

• Patches.PATCH_190925
• DynOHandlerMethodArgumentResolver

Field Summary

Fields inherited from class com.fasterxml.jackson.databind.deser.DeserializationProblemHandler

NOT_HANDLED

Constructor Summary

Constructors

Constructor	Description
StringDeserializationProblemHandler()

Method Summary

Modifier and Type	Method	Description
Object	handleUnexpectedToken(DeserializationContext ctxt, JavaType targetType, com.fasterxml.jackson.core.JsonToken t, com.fasterxml.jackson.core.JsonParser p, String failureMsg)

Methods inherited from class com.fasterxml.jackson.databind.deser.DeserializationProblemHandler

handleInstantiationProblem, handleMissingInstantiator, handleMissingInstantiator, handleMissingTypeId, handleUnexpectedToken, handleUnknownProperty, handleUnknownTypeId, handleWeirdKey, handleWeirdNativeValue, handleWeirdNumberValue, handleWeirdStringValue

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

StringDeserializationProblemHandler

public StringDeserializationProblemHandler()

Method Details

handleUnexpectedToken

public Object handleUnexpectedToken(DeserializationContext ctxt,
 JavaType targetType,
 com.fasterxml.jackson.core.JsonToken t,
 com.fasterxml.jackson.core.JsonParser p,
 String failureMsg)
                             throws IOException

Overrides:

handleUnexpectedToken in class DeserializationProblemHandler

Throws:

IOException