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Use type adapter to make enums lowercase
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45 changes: 45 additions & 0 deletions
45
src/main/java/com/terraformersmc/modmenu/util/EnumToLowerCaseJsonConverter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| package com.terraformersmc.modmenu.util; | ||
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| import com.google.gson.*; | ||
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| import java.lang.reflect.Type; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| public final class EnumToLowerCaseJsonConverter implements JsonSerializer<Enum<?>>, JsonDeserializer<Enum<?>> { | ||
| private static final Map<String, Class<? extends Enum<?>>> TYPE_CACHE = new HashMap<>(); | ||
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| @Override | ||
| public JsonElement serialize(final Enum<?> src, final Type typeOfSrc, final JsonSerializationContext context) { | ||
| if (src == null) { | ||
| return JsonNull.INSTANCE; | ||
| } | ||
| return new JsonPrimitive(src.name().toLowerCase()); | ||
| } | ||
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| @Override | ||
| public Enum<?> deserialize(final JsonElement json, | ||
| final Type type, | ||
| final JsonDeserializationContext context) throws JsonParseException { | ||
| if (json == null || json.isJsonNull()) { | ||
| return null; | ||
| } | ||
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| if (!json.isJsonPrimitive() || !json.getAsJsonPrimitive().isString()) { | ||
| throw new JsonParseException("Expecting a String JsonPrimitive, getting " + json); | ||
| } | ||
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| try { | ||
| final String enumClassName = type.getTypeName(); | ||
| Class<? extends Enum<?>> enumClass = TYPE_CACHE.get(enumClassName); | ||
| if (enumClass == null) { | ||
| enumClass = (Class<? extends Enum<?>>) Class.forName(enumClassName); | ||
| TYPE_CACHE.put(enumClassName, enumClass); | ||
| } | ||
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| return Enum.valueOf((Class) enumClass, json.getAsString().toUpperCase()); | ||
| } catch (final ClassNotFoundException e) { | ||
| throw new JsonParseException(e); | ||
| } | ||
| } | ||
| } |