com.fasterxml.jackson.annotation.JsonIgnore Maven / Gradle / Ivy
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package com.fasterxml.jackson.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Marker annotation that indicates that the annotated method or field is to be
* ignored by introspection-based
* serialization and deserialization functionality. That is, it should
* not be consider a "getter", "setter" or "creator".
*
* In addition, starting with Jackson 1.9, if this is the only annotation
* associated with a property, it will also cause cause the whole
* property to be ignored: that is, if setter has this annotation and
* getter has no annotations, getter is also effectively ignored.
* It is still possible for different accessors to use different
* annotations; so if only "getter" is to be ignored, other accessors
* (setter or field) would need explicit annotation to prevent
* ignoral (usually {@link JsonProperty}).
*
* For example, a "getter" method that would otherwise denote
* a property (like, say, "getValue" to suggest property "value")
* to serialize, would be ignored and no such property would
* be output unless another annotation defines alternative method to use.
*
* Before version 1.9, this annotation worked purely on method-by-method (or field-by-field)
* basis; annotation on one method or field did not imply ignoring other methods
* or fields. However, with version 1.9 and above, annotations associated
* with various accessors (getter, setter, field, constructor parameter) of
* a logical property are combined; meaning that annotations in one (say, setter)
* can have effects on all of them (if getter or field has nothing indicating
* otherwise).
*
* Annotation is usually used just a like a marker annotation, that
* is, without explicitly defining 'value' argument (which defaults
* to true): but argument can be explicitly defined.
* This can be done to override an existing JsonIgnore by explicitly
* defining one with 'false' argument.
*
* Annotation is similar to {@link javax.xml.bind.annotation.XmlTransient}
*/
@Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotation
public @interface JsonIgnore
{
/**
* Optional argument that defines whether this annotation is active
* or not. The only use for value 'false' if for overriding purposes
* (which is not needed often); most likely it is needed for use
* with "mix-in annotations" (aka "annotation overrides").
* For most cases, however, default value of "true" is just fine
* and should be omitted.
*/
boolean value() default true;
}