How Can I Selectively Apply @JsonIgnore for Serialization Only in Jackson?

Selective @JsonIgnore Application: Serialization Only

When working with sensitive data during serialization and deserialization, it's often desirable to exclude certain properties from being transmitted. The @JsonIgnore annotation offers this functionality, but it applies to both serialization and deserialization by default. For scenarios where you need to suppress encryption for serialization only, here's how you can achieve that:

Version-Dependent Solution

Prior to Jackson version 1.9, you could restrict @JsonIgnore to getter methods to enable deserialization while disabling it for serialization. This meant annotating only the getter with @JsonIgnore.

New Approach for Jackson 1.9

In later Jackson versions, the @JsonProperty annotation provides additional flexibility. To apply @JsonIgnore only to serialization:

1. Add @JsonIgnore to the getter as before.
2. Add @JsonProperty with an explicit field name to the setter method for the sensitive property, ensuring deserialization works as expected.

Property-Level Access Control

For versions with Jackson's @JsonProperty.Access annotation, you have another option:

@JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
private String password;

This allows serialization of the password but prevents its deserialization, effectively securing it. Refer to the Jackson documentation for further details.

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