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Support modded enums in gson using custom EnumTypeAdapter. Resolves carbon breaking materials in issue #90.

This commit is contained in:
Byteflux 2014-10-20 04:31:11 -07:00 committed by t00thpick1
parent 7ada15992b
commit 81fc029736
2 changed files with 68 additions and 1 deletions
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3
src/main/java/com/massivecraft/factions/P.java
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@ -8,6 +8,7 @@ import com.massivecraft.factions.integration.Worldguard;
import com.massivecraft.factions.listeners.*;
import com.massivecraft.factions.struct.ChatMode;
import com.massivecraft.factions.util.AutoLeaveTask;
import com.massivecraft.factions.util.EnumTypeAdapter;
import com.massivecraft.factions.util.LazyLocation;
import com.massivecraft.factions.util.MapFLocToStringSetTypeAdapter;
import com.massivecraft.factions.util.MyLocationTypeAdapter;
@ -124,7 +125,7 @@ public class P extends MPlugin {
public GsonBuilder getGsonBuilder() {
Type mapFLocToStringSetType = new TypeToken<Map<FLocation, Set<String>>>() {}.getType();
return new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().excludeFieldsWithModifiers(Modifier.TRANSIENT, Modifier.VOLATILE).registerTypeAdapter(LazyLocation.class, new MyLocationTypeAdapter()).registerTypeAdapter(mapFLocToStringSetType, new MapFLocToStringSetTypeAdapter());
return new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().excludeFieldsWithModifiers(Modifier.TRANSIENT, Modifier.VOLATILE).registerTypeAdapter(LazyLocation.class, new MyLocationTypeAdapter()).registerTypeAdapter(mapFLocToStringSetType, new MapFLocToStringSetTypeAdapter()).registerTypeAdapterFactory(EnumTypeAdapter.ENUM_FACTORY);
}
@Override

66
src/main/java/com/massivecraft/factions/util/EnumTypeAdapter.java Normal file
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@ -0,0 +1,66 @@
package com.massivecraft.factions.util;
import org.bukkit.craftbukkit.libs.com.google.gson.Gson;
import org.bukkit.craftbukkit.libs.com.google.gson.TypeAdapter;
import org.bukkit.craftbukkit.libs.com.google.gson.TypeAdapterFactory;
import org.bukkit.craftbukkit.libs.com.google.gson.annotations.SerializedName;
import org.bukkit.craftbukkit.libs.com.google.gson.reflect.TypeToken;
import org.bukkit.craftbukkit.libs.com.google.gson.stream.JsonReader;
import org.bukkit.craftbukkit.libs.com.google.gson.stream.JsonToken;
import org.bukkit.craftbukkit.libs.com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public final class EnumTypeAdapter<T extends Enum<T>> extends TypeAdapter<T> {
private final Map<String, T> nameToConstant = new HashMap<String, T>();
private final Map<T, String> constantToName = new HashMap<T, String>();
public EnumTypeAdapter(Class<T> classOfT) {
try {
for (T constant : classOfT.getEnumConstants()) {
String name = constant.name();
SerializedName annotation = classOfT.getField(name).getAnnotation(SerializedName.class);
if (annotation != null) {
name = annotation.value();
}
nameToConstant.put(name, constant);
constantToName.put(constant, name);
}
} catch (NoSuchFieldException e) {
// ignore since it could be a modified enum
}
}
public T read(JsonReader in) throws IOException {
if (in.peek() == JsonToken.NULL) {
in.nextNull();
return null;
}
return nameToConstant.get(in.nextString());
}
public void write(JsonWriter out, T value) throws IOException {
out.value(value == null ? null : constantToName.get(value));
}
public static final TypeAdapterFactory ENUM_FACTORY = newEnumTypeHierarchyFactory();
public static <TT> TypeAdapterFactory newEnumTypeHierarchyFactory() {
return new TypeAdapterFactory() {
@SuppressWarnings({"rawtypes", "unchecked"})
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
Class<? super T> rawType = typeToken.getRawType();
if (!Enum.class.isAssignableFrom(rawType) || rawType == Enum.class) {
return null;
}
if (!rawType.isEnum()) {
rawType = rawType.getSuperclass(); // handle anonymous subclasses
}
return (TypeAdapter<T>) new EnumTypeAdapter(rawType);
}
};
}
}