replace jackson with gson
jbb01
10 months ago
parent
e8ace4fea5
commit
332c73f5fd
@ -1,61 +0,0 @@
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package eu.jonahbauer.chat.server.bot;
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import com.fasterxml.jackson.core.JsonParseException;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.core.JsonToken;
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import com.fasterxml.jackson.databind.DeserializationContext;
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import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
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import eu.jonahbauer.chat.bot.config.BotConfig;
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import eu.jonahbauer.chat.bot.config.BotConfigurationException;
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import java.io.IOException;
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import java.util.ArrayList;
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public class BotConfigDeserializer extends StdDeserializer<BotConfig> {
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protected BotConfigDeserializer() {
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super(BotConfig.class);
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}
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@Override
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public BotConfig deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
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if (p.currentToken() == JsonToken.START_OBJECT) {
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p.nextToken();
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}
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var builder = BotConfig.builder();
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while (p.currentToken() == JsonToken.FIELD_NAME) {
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var key = p.currentName();
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switch (p.nextToken()) {
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case VALUE_STRING -> builder.value(key, p.getValueAsString());
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case VALUE_FALSE -> builder.value(key, false);
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case VALUE_TRUE -> builder.value(key, true);
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case VALUE_NULL -> {}
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case VALUE_NUMBER_FLOAT -> builder.value(key, p.getDoubleValue());
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case VALUE_NUMBER_INT -> builder.value(key, p.getLongValue());
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case START_ARRAY -> {
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var list = new ArrayList<String>();
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while (p.nextToken() != JsonToken.END_ARRAY) {
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if (p.currentToken() == JsonToken.VALUE_STRING) {
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list.add(p.getValueAsString());
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} else {
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throw new BotConfigurationException("Unsupported property type in array.");
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}
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}
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builder.value(key, list);
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}
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case START_OBJECT -> throw new BotConfigurationException("Unsupported property type: object");
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default -> throw new BotConfigurationException("Unsupported property property type.");
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}
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p.nextToken();
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}
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if (p.currentToken() == JsonToken.END_OBJECT) {
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return builder.build();
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}
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throw new JsonParseException(p, "Unexpected token: " + p.currentToken(), p.currentLocation());
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}
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}
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@ -0,0 +1,30 @@
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package eu.jonahbauer.chat.server.json;
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import com.google.gson.TypeAdapter;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.io.IOException;
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public class BooleanTypeAdapter extends TypeAdapter<Boolean> {
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@Override
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public void write(@NotNull JsonWriter out, @Nullable Boolean value) throws IOException {
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if (value == null) {
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out.nullValue();
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} else {
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out.value(value ? 1 : 0);
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}
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}
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@Override
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public Boolean read(@NotNull JsonReader in) throws IOException {
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return switch (in.peek()) {
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case NUMBER -> in.nextInt() != 0;
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case BOOLEAN -> in.nextBoolean();
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case NULL -> null;
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default -> throw new IllegalStateException("Expected a number but was " + in.peek());
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};
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}
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}
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@ -0,0 +1,55 @@
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package eu.jonahbauer.chat.server.json;
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import com.google.gson.*;
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import eu.jonahbauer.chat.bot.config.BotConfig;
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import eu.jonahbauer.chat.bot.config.BotConfigurationException;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.lang.reflect.Type;
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public class BotConfigDeserializer implements JsonDeserializer<BotConfig> {
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@Override
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public @Nullable BotConfig deserialize(@NotNull JsonElement json, @NotNull Type typeOfT, @NotNull JsonDeserializationContext context) throws JsonParseException {
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if (json.isJsonNull()) return null;
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if (!json.isJsonObject()) throw new BotConfigurationException("Expected an object");
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var obj = json.getAsJsonObject();
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var builder = BotConfig.builder();
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obj.asMap().forEach((key, value) -> {
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if (value instanceof JsonPrimitive primitive) {
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if (primitive.isBoolean()) {
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builder.value(key, primitive.getAsBoolean());
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} else if (primitive.isString()) {
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builder.value(key, primitive.getAsString());
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} else if (primitive.isNumber()) {
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switch (primitive.getAsNumber()) {
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case Long l -> builder.value(key, l);
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case Double d -> builder.value(key, d);
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case Number n -> throw new BotConfigurationException("Invalid number: " + n);
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}
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} else {
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throw new AssertionError();
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}
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} else if (value.isJsonArray()) {
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var list = value.getAsJsonArray().asList().stream()
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.map(e -> {
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if (e instanceof JsonPrimitive primitive && primitive.isString()) {
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return primitive.getAsString();
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} else {
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throw new BotConfigurationException("Unsupported property type in array.");
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}
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})
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.toList();
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builder.value(key, list);
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} else {
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throw new BotConfigurationException("Unsupported property type.");
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}
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});
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return builder.build();
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}
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}
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@ -0,0 +1,33 @@
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package eu.jonahbauer.chat.server.json;
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import com.google.gson.TypeAdapter;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.io.IOException;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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public class LocalDateTimeTypeAdapter extends TypeAdapter<LocalDateTime> {
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private final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
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@Override
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public void write(@NotNull JsonWriter out, @Nullable LocalDateTime value) throws IOException {
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if (value == null) {
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out.nullValue();
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} else {
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out.value(formatter.format(value));
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}
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}
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@Override
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public LocalDateTime read(JsonReader in) throws IOException {
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return switch (in.peek()) {
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case NULL -> null;
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case STRING -> formatter.parse(in.nextString(), LocalDateTime::from);
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default -> throw new IllegalStateException("Expected a string but was " + in.peek());
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};
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}
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}
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@ -0,0 +1,327 @@
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/*
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* Copyright (C) 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package eu.jonahbauer.chat.server.json;
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import com.google.gson.Gson;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParseException;
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import com.google.gson.JsonPrimitive;
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import com.google.gson.TypeAdapter;
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import com.google.gson.TypeAdapterFactory;
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import com.google.gson.reflect.TypeToken;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import java.io.IOException;
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import java.util.LinkedHashMap;
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import java.util.Map;
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/**
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* Adapts values whose runtime type may differ from their declaration type. This is necessary when a
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* field's type is not the same type that GSON should create when deserializing that field. For
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* example, consider these types:
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*
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* <pre>{@code
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* abstract class Shape {
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* int x;
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* int y;
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* }
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* class Circle extends Shape {
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* int radius;
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* }
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* class Rectangle extends Shape {
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* int width;
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* int height;
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* }
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* class Diamond extends Shape {
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* int width;
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* int height;
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* }
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* class Drawing {
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* Shape bottomShape;
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* Shape topShape;
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* }
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* }</pre>
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*
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* <p>Without additional type information, the serialized JSON is ambiguous. Is the bottom shape in
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* this drawing a rectangle or a diamond?
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*
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* <pre>{@code
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* {
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* "bottomShape": {
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* "width": 10,
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* "height": 5,
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* "x": 0,
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* "y": 0
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* },
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* "topShape": {
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* "radius": 2,
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* "x": 4,
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* "y": 1
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* }
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* }
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* }</pre>
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*
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* This class addresses this problem by adding type information to the serialized JSON and honoring
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* that type information when the JSON is deserialized:
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*
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* <pre>{@code
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* {
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* "bottomShape": {
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* "type": "Diamond",
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* "width": 10,
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* "height": 5,
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* "x": 0,
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* "y": 0
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* },
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* "topShape": {
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* "type": "Circle",
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* "radius": 2,
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* "x": 4,
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* "y": 1
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* }
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* }
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* }</pre>
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*
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* Both the type field name ({@code "type"}) and the type labels ({@code "Rectangle"}) are
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* configurable.
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*
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* <h2>Registering Types</h2>
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*
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* Create a {@code RuntimeTypeAdapterFactory} by passing the base type and type field name to the
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* {@link #of} factory method. If you don't supply an explicit type field name, {@code "type"} will
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* be used.
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*
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* <pre>{@code
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* RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory
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* = RuntimeTypeAdapterFactory.of(Shape.class, "type");
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* }</pre>
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*
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* Next register all of your subtypes. Every subtype must be explicitly registered. This protects
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* your application from injection attacks. If you don't supply an explicit type label, the type's
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* simple name will be used.
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*
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* <pre>{@code
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* shapeAdapterFactory.registerSubtype(Rectangle.class, "Rectangle");
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* shapeAdapterFactory.registerSubtype(Circle.class, "Circle");
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* shapeAdapterFactory.registerSubtype(Diamond.class, "Diamond");
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* }</pre>
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*
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* Finally, register the type adapter factory in your application's GSON builder:
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*
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* <pre>{@code
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* Gson gson = new GsonBuilder()
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* .registerTypeAdapterFactory(shapeAdapterFactory)
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* .create();
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* }</pre>
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*
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* Like {@code GsonBuilder}, this API supports chaining:
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*
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* <pre>{@code
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* RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory = RuntimeTypeAdapterFactory.of(Shape.class)
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* .registerSubtype(Rectangle.class)
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* .registerSubtype(Circle.class)
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* .registerSubtype(Diamond.class);
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* }</pre>
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*
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* <h2>Serialization and deserialization</h2>
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*
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* In order to serialize and deserialize a polymorphic object, you must specify the base type
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* explicitly.
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*
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* <pre>{@code
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* Diamond diamond = new Diamond();
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* String json = gson.toJson(diamond, Shape.class);
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* }</pre>
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*
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* And then:
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*
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* <pre>{@code
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* Shape shape = gson.fromJson(json, Shape.class);
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* }</pre>
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*/
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public final class RuntimeTypeAdapterFactory<T> implements TypeAdapterFactory {
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private final Class<?> baseType;
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private final String typeFieldName;
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private final Map<String, Class<?>> labelToSubtype = new LinkedHashMap<>();
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private final Map<Class<?>, String> subtypeToLabel = new LinkedHashMap<>();
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private final boolean maintainType;
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private boolean recognizeSubtypes;
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private RuntimeTypeAdapterFactory(Class<?> baseType, String typeFieldName, boolean maintainType) {
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if (typeFieldName == null || baseType == null) {
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throw new NullPointerException();
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}
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this.baseType = baseType;
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this.typeFieldName = typeFieldName;
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this.maintainType = maintainType;
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}
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/**
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* Creates a new runtime type adapter using for {@code baseType} using {@code typeFieldName} as
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* the type field name. Type field names are case sensitive.
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*
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* @param maintainType true if the type field should be included in deserialized objects
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*/
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public static <T> RuntimeTypeAdapterFactory<T> of(
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Class<T> baseType, String typeFieldName, boolean maintainType) {
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return new RuntimeTypeAdapterFactory<>(baseType, typeFieldName, maintainType);
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}
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/**
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* Creates a new runtime type adapter using for {@code baseType} using {@code typeFieldName} as
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* the type field name. Type field names are case sensitive.
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*/
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public static <T> RuntimeTypeAdapterFactory<T> of(Class<T> baseType, String typeFieldName) {
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return new RuntimeTypeAdapterFactory<>(baseType, typeFieldName, false);
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}
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/**
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* Creates a new runtime type adapter for {@code baseType} using {@code "type"} as the type field
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* name.
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*/
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public static <T> RuntimeTypeAdapterFactory<T> of(Class<T> baseType) {
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return new RuntimeTypeAdapterFactory<>(baseType, "type", false);
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}
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/**
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* Ensures that this factory will handle not just the given {@code baseType}, but any subtype of
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* that type.
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*/
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public RuntimeTypeAdapterFactory<T> recognizeSubtypes() {
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this.recognizeSubtypes = true;
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return this;
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}
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/**
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* Registers {@code type} identified by {@code label}. Labels are case sensitive.
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*
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* @throws IllegalArgumentException if either {@code type} or {@code label} have already been
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* registered on this type adapter.
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*/
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public RuntimeTypeAdapterFactory<T> registerSubtype(Class<? extends T> type, String label) {
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if (type == null || label == null) {
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throw new NullPointerException();
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}
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if (subtypeToLabel.containsKey(type) || labelToSubtype.containsKey(label)) {
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throw new IllegalArgumentException("types and labels must be unique");
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}
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labelToSubtype.put(label, type);
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subtypeToLabel.put(type, label);
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return this;
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}
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/**
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* Registers {@code type} identified by its {@link Class#getSimpleName simple name}. Labels are
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* case sensitive.
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*
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* @throws IllegalArgumentException if either {@code type} or its simple name have already been
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* registered on this type adapter.
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*/
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public RuntimeTypeAdapterFactory<T> registerSubtype(Class<? extends T> type) {
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return registerSubtype(type, type.getSimpleName());
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}
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@Override
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public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) {
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if (type == null) {
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return null;
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}
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Class<?> rawType = type.getRawType();
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boolean handle =
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recognizeSubtypes ? baseType.isAssignableFrom(rawType) : baseType.equals(rawType);
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if (!handle) {
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return null;
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}
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final TypeAdapter<JsonElement> jsonElementAdapter = gson.getAdapter(JsonElement.class);
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final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<>();
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final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<>();
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for (Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) {
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TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue()));
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labelToDelegate.put(entry.getKey(), delegate);
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subtypeToDelegate.put(entry.getValue(), delegate);
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}
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return new TypeAdapter<R>() {
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@Override
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public R read(JsonReader in) throws IOException {
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JsonElement jsonElement = jsonElementAdapter.read(in);
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JsonElement labelJsonElement;
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if (maintainType) {
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labelJsonElement = jsonElement.getAsJsonObject().get(typeFieldName);
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} else {
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labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName);
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}
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if (labelJsonElement == null) {
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throw new JsonParseException(
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"cannot deserialize "
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+ baseType
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+ " because it does not define a field named "
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+ typeFieldName);
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}
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String label = labelJsonElement.getAsString();
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@SuppressWarnings("unchecked") // registration requires that subtype extends T
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TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label);
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if (delegate == null) {
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throw new JsonParseException(
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"cannot deserialize "
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+ baseType
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+ " subtype named "
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+ label
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+ "; did you forget to register a subtype?");
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}
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return delegate.fromJsonTree(jsonElement);
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}
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@Override
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public void write(JsonWriter out, R value) throws IOException {
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Class<?> srcType = value.getClass();
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String label = subtypeToLabel.get(srcType);
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@SuppressWarnings("unchecked") // registration requires that subtype extends T
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TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType);
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if (delegate == null) {
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throw new JsonParseException(
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"cannot serialize " + srcType.getName() + "; did you forget to register a subtype?");
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}
|
||||
JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject();
|
||||
|
||||
if (maintainType) {
|
||||
jsonElementAdapter.write(out, jsonObject);
|
||||
return;
|
||||
}
|
||||
|
||||
JsonObject clone = new JsonObject();
|
||||
|
||||
if (jsonObject.has(typeFieldName)) {
|
||||
throw new JsonParseException(
|
||||
"cannot serialize "
|
||||
+ srcType.getName()
|
||||
+ " because it already defines a field named "
|
||||
+ typeFieldName);
|
||||
}
|
||||
clone.add(typeFieldName, new JsonPrimitive(label));
|
||||
|
||||
for (Map.Entry<String, JsonElement> e : jsonObject.entrySet()) {
|
||||
clone.add(e.getKey(), e.getValue());
|
||||
}
|
||||
jsonElementAdapter.write(out, clone);
|
||||
}
|
||||
}.nullSafe();
|
||||
}
|
||||
}
|
||||
@ -1,17 +1,15 @@
|
||||
module eu.jonahbauer.chat.server {
|
||||
exports eu.jonahbauer.chat.server;
|
||||
opens eu.jonahbauer.chat.server.bot to com.fasterxml.jackson.databind;
|
||||
opens eu.jonahbauer.chat.server.socket to com.fasterxml.jackson.databind;
|
||||
opens eu.jonahbauer.chat.server.bot to com.google.gson;
|
||||
opens eu.jonahbauer.chat.server.socket to com.google.gson;
|
||||
|
||||
requires com.fasterxml.jackson.core;
|
||||
requires com.fasterxml.jackson.databind;
|
||||
requires com.fasterxml.jackson.datatype.jsr310;
|
||||
requires com.google.gson;
|
||||
requires eu.jonahbauer.chat.bot.api;
|
||||
requires eu.jonahbauer.chat.server.management;
|
||||
requires java.management;
|
||||
requires java.net.http;
|
||||
requires org.jetbrains.annotations;
|
||||
requires org.slf4j;
|
||||
|
||||
requires static transitive org.jetbrains.annotations;
|
||||
requires static lombok;
|
||||
}
|
||||
Loading…
Reference in New Issue