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java client to build api objects, handle http transport, and parse/deserialize/serialize json to/from json

There is a newer version: 1.8.0

package io.github.stewseo.client.util;

import io.github.stewseo.client.json.JsonpDeserializer;
import io.github.stewseo.client.json.JsonpDeserializerBase;
import io.github.stewseo.client.json.JsonpMapper;
import io.github.stewseo.client.json.JsonpMappingException;
import io.github.stewseo.client.json.JsonpUtils;

import jakarta.json.stream.JsonParser;

import java.util.EnumSet;
import java.util.function.Function;

public class Pair {

    private final K name;
    private final V value;

    public Pair(K name, V value) {
        this.name = name;
        this.value = value;
    }

    public K key() {
        return this.name;
    }

    public V value() {
        return this.value;
    }

    public static  Pair of(K name, V value) {
        return new Pair<>(name, value);
    }

    public static  JsonpDeserializer> deserializer(
            Function keyDeserializer, JsonpDeserializer valueDeserializer
    ) {
        return new JsonpDeserializerBase<>(EnumSet.of(JsonParser.Event.START_OBJECT)) {
            @Override
            public Pair deserialize(JsonParser parser, JsonpMapper mapper, JsonParser.Event event) {

                JsonpUtils.expectNextEvent(parser, JsonParser.Event.KEY_NAME);
                String name = parser.getString();

                try {
                    K key = keyDeserializer.apply(parser.getString());
                    V value = valueDeserializer.deserialize(parser, mapper);
                    JsonpUtils.expectNextEvent(parser, JsonParser.Event.END_OBJECT);

                    return new Pair<>(key, value);
                } catch (Exception e) {
                    throw JsonpMappingException.from(e, null, name, parser);
                }
            }
        };
    }
}