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General data-binding functionality for Jackson: works on core streaming API

There is a newer version: 2.17.0

package com.fasterxml.jackson.databind.introspect;

import java.lang.reflect.Type;

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeBindings;
import com.fasterxml.jackson.databind.type.TypeFactory;

/**
 * Interface that defines API used by members (like {@link AnnotatedMethod})
 * to dynamically resolve types they have.
 *
 * @since 2.7
 */
public interface TypeResolutionContext {
    public JavaType resolveType(Type t);

    public static class Basic
        implements TypeResolutionContext
    {
        private final TypeFactory _typeFactory;
        private final TypeBindings _bindings;

        public Basic(TypeFactory tf, TypeBindings b) {
            _typeFactory = tf;
            _bindings = b;
        }

        @Override
        public JavaType resolveType(Type type) {
            // 06-Sep-2020, tatu: Careful wrt [databind#2846][databind#2821],
            //     call new method added in 2.12
            return _typeFactory.resolveMemberType(type, _bindings);
        }

        /*// debugging
        @Override
        public String toString() {
            return "[TRC.Basic, bindings: "+_bindings+"]";
        }
        */
    }

    /**
     * Dummy implementation for case where there are no bindings available
     * (for example, for static methods and fields)
     *
     * @since 2.11.3
     */
    public static class Empty
        implements TypeResolutionContext
    {
        private final TypeFactory _typeFactory;

        public Empty(TypeFactory tf) {
            _typeFactory = tf;
        }

        @Override
        public JavaType resolveType(Type type) {
            return _typeFactory.constructType(type);
        }
    }
}