| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.gson.internal.bind; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Array; |
| import java.lang.reflect.GenericArrayType; |
| import java.lang.reflect.Type; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.TypeAdapter; |
| import com.google.gson.TypeAdapterFactory; |
| import com.google.gson.internal.$Gson$Types; |
| import com.google.gson.reflect.TypeToken; |
| import com.google.gson.stream.JsonReader; |
| import com.google.gson.stream.JsonToken; |
| import com.google.gson.stream.JsonWriter; |
| |
| /** |
| * Adapt an array of objects. |
| */ |
| public final class ArrayTypeAdapter<E> extends TypeAdapter<Object> { |
| public static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() { |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| @Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) { |
| Type type = typeToken.getType(); |
| if (!(type instanceof GenericArrayType || type instanceof Class && ((Class<?>) type).isArray())) { |
| return null; |
| } |
| |
| Type componentType = $Gson$Types.getArrayComponentType(type); |
| TypeAdapter<?> componentTypeAdapter = gson.getAdapter(TypeToken.get(componentType)); |
| return new ArrayTypeAdapter( |
| gson, componentTypeAdapter, $Gson$Types.getRawType(componentType)); |
| } |
| }; |
| |
| private final Class<E> componentType; |
| private final TypeAdapter<E> componentTypeAdapter; |
| |
| public ArrayTypeAdapter(Gson context, TypeAdapter<E> componentTypeAdapter, Class<E> componentType) { |
| this.componentTypeAdapter = |
| new TypeAdapterRuntimeTypeWrapper<E>(context, componentTypeAdapter, componentType); |
| this.componentType = componentType; |
| } |
| |
| @Override public Object read(JsonReader in) throws IOException { |
| if (in.peek() == JsonToken.NULL) { |
| in.nextNull(); |
| return null; |
| } |
| |
| List<E> list = new ArrayList<E>(); |
| in.beginArray(); |
| while (in.hasNext()) { |
| E instance = componentTypeAdapter.read(in); |
| list.add(instance); |
| } |
| in.endArray(); |
| Object array = Array.newInstance(componentType, list.size()); |
| for (int i = 0; i < list.size(); i++) { |
| Array.set(array, i, list.get(i)); |
| } |
| return array; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override public void write(JsonWriter out, Object array) throws IOException { |
| if (array == null) { |
| out.nullValue(); |
| return; |
| } |
| |
| out.beginArray(); |
| for (int i = 0, length = Array.getLength(array); i < length; i++) { |
| E value = (E) Array.get(array, i); |
| componentTypeAdapter.write(out, value); |
| } |
| out.endArray(); |
| } |
| } |