Examples of TypeAdapterFactory

com.google.gson.TypeAdapterFactory
Creates type adapters for set of related types. Type adapter factories are most useful when several types share similar structure in their JSON form.
Example: Converting enums to lowercase
In this example, we implement a factory that creates type adapters for all enums. The type adapters will write enums in lowercase, despite the fact that they're defined in {@code CONSTANT_CASE} in the corresponding Javamodel:
```
    {@code}public class LowercaseEnumTypeAdapterFactory implements TypeAdapterFactory  public  TypeAdapter create(Gson gson, TypeToken type) { Class rawType = (Class) type.getRawType(); if (!rawType.isEnum()) { return null; } final Map lowercaseToConstant = new HashMap(); for (T constant : rawType.getEnumConstants()) { lowercaseToConstant.put(toLowercase(constant), constant); } return new TypeAdapter() { public void write(JsonWriter out, T value) throws IOException { if (value == null) { out.nullValue(); } else { out.value(toLowercase(value)); } } public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } else { return lowercaseToConstant.get(reader.nextString()); } } }; } private String toLowercase(Object o) { return o.toString().toLowerCase(Locale.US); } } }
```
Type adapter factories select which types they provide type adapters for. If a factory cannot support a given type, it must return null when that type is passed to {@link #create}. Factories should expect {@code create()} to be called on them for many types and should return null formost of those types. In the above example the factory returns null for calls to {@code create()} where {@code type} is not an enum.
A factory is typically called once per type, but the returned type adapter may be used many times. It is most efficient to do expensive work like reflection in {@code create()} so that the type adapter's {@code read()} and {@code write()} methods can be very fast. In this example themapping from lowercase name to enum value is computed eagerly.
As with type adapters, factories must be registered with a {@link com.google.gson.GsonBuilder} for them to take effect:
```
   {@code GsonBuilder builder = new GsonBuilder(); builder.registerTypeAdapterFactory(new LowercaseEnumTypeAdapterFactory()); ... Gson gson = builder.create();}
```
If multiple factories support the same type, the factory registered earlier takes precedence.
Example: composing other type adapters
In this example we implement a factory for Guava's {@code Multiset}collection type. The factory can be used to create type adapters for multisets of any element type: the type adapter for {@code Multiset
} is different from the type adapter for {@code Multiset
}.
The type adapter delegates to another type adapter for the multiset elements. It figures out the element type by reflecting on the multiset's type token. A {@code Gson} is passed in to {@code create} forjust this purpose:
```
    {@code}public class MultisetTypeAdapterFactory implements TypeAdapterFactory  public  TypeAdapter create(Gson gson, TypeToken typeToken) { Type type = typeToken.getType(); if (typeToken.getRawType() != Multiset.class || !(type instanceof ParameterizedType)) { return null; } Type elementType = ((ParameterizedType) type).getActualTypeArguments()[0]; TypeAdapter elementAdapter = gson.getAdapter(TypeToken.get(elementType)); return (TypeAdapter) newMultisetAdapter(elementAdapter); } private  TypeAdapter> newMultisetAdapter( final TypeAdapter elementAdapter) { return new TypeAdapter>() { public void write(JsonWriter out, Multiset value) throws IOException { if (value == null) { out.nullValue(); return; } out.beginArray(); for (Multiset.Entry entry : value.entrySet()) { out.value(entry.getCount()); elementAdapter.write(out, entry.getElement()); } out.endArray(); } public Multiset read(JsonReader in) throws IOException { if (in.peek() == JsonToken.NULL) { in.nextNull(); return null; } Multiset result = LinkedHashMultiset.create(); in.beginArray(); while (in.hasNext()) { int count = in.nextInt(); E element = elementAdapter.read(in); result.add(element, count); } in.endArray(); return result; } }; } } }
```
Delegating from one type adapter to another is extremely powerful; it's the foundation of how Gson converts Java objects and collections. Whenever possible your factory should retrieve its delegate type adapter in the {@code create()} method; this ensures potentially-expensive type adaptercreation happens only once. @since 2.1
com.massivecraft.mcore.xlib.gson.TypeAdapterFactory
Creates type adapters for set of related types. Type adapter factories are most useful when several types share similar structure in their JSON form.
Example: Converting enums to lowercase
In this example, we implement a factory that creates type adapters for all enums. The type adapters will write enums in lowercase, despite the fact that they're defined in {@code CONSTANT_CASE} in the corresponding Javamodel:
```
    {@code}public class LowercaseEnumTypeAdapterFactory implements TypeAdapter.Factory  public  TypeAdapter create(Gson gson, TypeToken type) { Class rawType = (Class) type.getRawType(); if (!rawType.isEnum()) { return null; } final Map lowercaseToConstant = new HashMap(); for (T constant : rawType.getEnumConstants()) { lowercaseToConstant.put(toLowercase(constant), constant); } return new TypeAdapter() { public void write(JsonWriter out, T value) throws IOException { if (value == null) { out.nullValue(); } else { out.value(toLowercase(value)); } } public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } else { return lowercaseToConstant.get(reader.nextString()); } } }; } private String toLowercase(Object o) { return o.toString().toLowerCase(Locale.US); } } }
```
Type adapter factories select which types they provide type adapters for. If a factory cannot support a given type, it must return null when that type is passed to {@link #create}. Factories should expect {@code create()} to be called on them for many types and should return null formost of those types. In the above example the factory returns null for calls to {@code create()} where {@code type} is not an enum.
A factory is typically called once per type, but the returned type adapter may be used many times. It is most efficient to do expensive work like reflection in {@code create()} so that the type adapter's {@code read()} and {@code write()} methods can be very fast. In this example themapping from lowercase name to enum value is computed eagerly.
As with type adapters, factories must be registered with a {@link com.massivecraft.mcore.xlib.gson.GsonBuilder} for them to take effect:
```
   {@code GsonBuilder builder = new GsonBuilder(); builder.registerTypeAdapterFactory(new LowercaseEnumTypeAdapterFactory()); ... Gson gson = builder.create();}
```
If multiple factories support the same type, the factory registered earlier takes precedence.
Example: composing other type adapters
In this example we implement a factory for Guava's {@code Multiset}collection type. The factory can be used to create type adapters for multisets of any element type: the type adapter for {@code Multiset
} is different from the type adapter for {@code Multiset
}.
The type adapter delegates to another type adapter for the multiset elements. It figures out the element type by reflecting on the multiset's type token. A {@code Gson} is passed in to {@code create} forjust this purpose:
```
    {@code}public class MultisetTypeAdapterFactory implements TypeAdapter.Factory  public  TypeAdapter create(Gson gson, TypeToken typeToken) { Type type = typeToken.getType(); if (typeToken.getRawType() != Multiset.class || !(type instanceof ParameterizedType)) { return null; } Type elementType = ((ParameterizedType) type).getActualTypeArguments()[0]; TypeAdapter elementAdapter = gson.getAdapter(TypeToken.get(elementType)); return (TypeAdapter) newMultisetAdapter(elementAdapter); } private  TypeAdapter> newMultisetAdapter( final TypeAdapter elementAdapter) { return new TypeAdapter>() { public void write(JsonWriter out, Multiset value) throws IOException { if (value == null) { out.nullValue(); return; } out.beginArray(); for (Multiset.Entry entry : value.entrySet()) { out.value(entry.getCount()); elementAdapter.write(out, entry.getElement()); } out.endArray(); } public Multiset read(JsonReader in) throws IOException { if (in.peek() == JsonToken.NULL) { in.nextNull(); return null; } Multiset result = LinkedHashMultiset.create(); in.beginArray(); while (in.hasNext()) { int count = in.nextInt(); E element = elementAdapter.read(in); result.add(element, count); } in.endArray(); return result; } }; } } }
```
Delegating from one type adapter to another is extremely powerful; it's the foundation of how Gson converts Java objects and collections. Whenever possible your factory should retrieve its delegate type adapter in the {@code create()} method; this ensures potentially-expensive type adaptercreation happens only once. @since 2.1

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    };
  }


  public static <TT> TypeAdapterFactory newFactory(
      final TypeToken<TT> type, final TypeAdapter<TT> typeAdapter) {
    return new TypeAdapterFactory() {
      @SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return typeToken.equals(type) ? (TypeAdapter<T>) typeAdapter : null;
      }
    };

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Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    };
  }


  public static <TT> TypeAdapterFactory newFactory(
      final Class<TT> type, final TypeAdapter<TT> typeAdapter) {
    return new TypeAdapterFactory() {
      @SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return typeToken.getRawType() == type ? (TypeAdapter<T>) typeAdapter : null;
      }
      @Override public String toString() {

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Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    };
  }


  public static <TT> TypeAdapterFactory newFactory(
      final Class<TT> unboxed, final Class<TT> boxed, final TypeAdapter<? super TT> typeAdapter) {
    return new TypeAdapterFactory() {
      @SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        Class<? super T> rawType = typeToken.getRawType();
        return (rawType == unboxed || rawType == boxed) ? (TypeAdapter<T>) typeAdapter : null;
      }

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Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    };
  }


  public static <TT> TypeAdapterFactory newFactoryForMultipleTypes(final Class<TT> base,
      final Class<? extends TT> sub, final TypeAdapter<? super TT> typeAdapter) {
    return new TypeAdapterFactory() {
      @SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        Class<? super T> rawType = typeToken.getRawType();
        return (rawType == base || rawType == sub) ? (TypeAdapter<T>) typeAdapter : null;
      }

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Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    };
  }


  public static <TT> TypeAdapterFactory newTypeHierarchyFactory(
      final Class<TT> clazz, final TypeAdapter<TT> typeAdapter) {
    return new TypeAdapterFactory() {
      @SuppressWarnings("unchecked")
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return clazz.isAssignableFrom(typeToken.getRawType()) ? (TypeAdapter<T>) typeAdapter : null;
      }
      @Override public String toString() {

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Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

    this.serializeNulls = serializeNulls;
    this.generateNonExecutableJson = generateNonExecutableGson;
    this.htmlSafe = htmlSafe;
    this.prettyPrinting = prettyPrinting;


    TypeAdapterFactory reflectiveTypeAdapterFactory = new ReflectiveTypeAdapterFactory(
        constructorConstructor, fieldNamingPolicy, excluder);


    ConstructorConstructor constructorConstructor = new ConstructorConstructor();
    List<TypeAdapterFactory> factories = new ArrayList<TypeAdapterFactory>();

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Examples of TypeAdapterFactory

Example: Converting enums to lowercase

Example: composing other type adapters

Example: Converting enums to lowercase

Example: composing other type adapters

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory

Examples of com.massivecraft.mcore.xlib.gson.TypeAdapterFactory