Class JacksonContentFilter

java.lang.Object

io.fluxzero.sdk.common.serialization.jackson.JacksonContentFilter

All Implemented Interfaces:

ContentFilter

public class JacksonContentFilter
extends Object
implements ContentFilter

A ContentFilter implementation that uses Jackson to filter content dynamically for a specific User.

This class enables context-aware filtering based on FilterContent annotated handler methods in the value’s class. These handlers can compute and return a filtered version of an object based on the current user context.

Filtering is performed via Jackson serialization, where a custom serializer is installed to intercept object serialization and invoke the appropriate content filtering logic.

How it works

• A JacksonContentFilter.FilteringSerializer is registered with Jackson using a BeanSerializerModifier.
• The serializer tries to invoke a FilterContent-annotated method using the HandlerInspector and passes in the root object and current User (via parameter resolvers).
• If filtering returns a different value, that value is serialized instead.

See Also:

• FilterContent
• User
• HandlerMatcher

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	JacksonContentFilter.FilteringSerializer	Custom Jackson serializer that attempts to invoke a FilterContent handler method during serialization.

Constructor Summary

Constructors

Constructor	Description
JacksonContentFilter(com.fasterxml.jackson.databind.ObjectMapper mapper)	Creates a new content filter using the provided ObjectMapper.

Method Summary

Modifier and Type	Method	Description
<T> T	filterContent(T value, User viewer)	Filters the given value based on the current viewer (user) context.

Methods inherited from class Object

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

Constructor Details

JacksonContentFilter

public JacksonContentFilter(com.fasterxml.jackson.databind.ObjectMapper mapper)

Creates a new content filter using the provided ObjectMapper.

The provided mapper is kept unchanged. A single internal copy is configured with:

• ALWAYS inclusion policy (to serialize nulls)
• A JacksonContentFilter.FilteringSerializer for applying FilterContent annotations
• Disabled JsonIgnore handling, to ensure all fields are considered for filtering

Parameters:

mapper - an ObjectMapper used for filtering and serialization

Method Details

filterContent

public <T> T filterContent(T value,
 User viewer)

Description copied from interface: ContentFilter

Filters the given value based on the current viewer (user) context. If a FilterContent handler exists in the object's class, it will be invoked to produce a user-specific view of the data.

Specified by:

filterContent in interface ContentFilter

Type Parameters:

T - the type of the content object

Parameters:

value - the original object

viewer - the user viewing the content

Returns:

the filtered version of the object, or the original object if filtering failed or was not applicable