Json ignore field only when a condition [closed]-CodePudding

I want to ignore a field when a it can be retrieved:

public boolean isActiveProduct() {

    ....
    ...
    if (product != null) {
        return product.isActiveProduct();
    }

    // ignore this field and don't return it in reponse
}

Any help will be appreciated!

CodePudding user response：

Create another method (possibly less visible) for JSON serialization, which returns null, if the product is null. Apply these annotations to this new method:

@JsonProperty("activeProduct")
@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)
@Nullable // optional annotation for static code analyser
protected Boolean isActiveProductOrNull() {
    if (product != null) {
        return product.isActiveProduct();
    } else {
        return null;
    }
}

Tag the current method as @JsonIgnore.

@JsonIgnore
public boolean isActiveProduct() {
    if (product != null) {
        return product.isActiveProduct();
    } else {
        return false; // or throw an exception, if you want.
    }
}