/*
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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 cn.emay.sdk.util.json.gson.internal.bind;
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import java.io.IOException;
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import java.lang.reflect.Array;
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import java.lang.reflect.GenericArrayType;
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import java.lang.reflect.Type;
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import java.util.ArrayList;
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import java.util.List;
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import cn.emay.sdk.util.json.gson.Gson;
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import cn.emay.sdk.util.json.gson.TypeAdapter;
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import cn.emay.sdk.util.json.gson.TypeAdapterFactory;
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import cn.emay.sdk.util.json.gson.internal.$Gson$Types;
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import cn.emay.sdk.util.json.gson.reflect.TypeToken;
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import cn.emay.sdk.util.json.gson.stream.JsonReader;
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import cn.emay.sdk.util.json.gson.stream.JsonToken;
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import cn.emay.sdk.util.json.gson.stream.JsonWriter;
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/**
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* Adapt an array of objects.
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*/
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public final class ArrayTypeAdapter<E> extends TypeAdapter<Object> {
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public static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() {
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@SuppressWarnings({ "unchecked", "rawtypes" })
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@Override
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public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
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Type type = typeToken.getType();
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if (!(type instanceof GenericArrayType || type instanceof Class && ((Class<?>) type).isArray())) {
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return null;
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}
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Type componentType = $Gson$Types.getArrayComponentType(type);
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TypeAdapter<?> componentTypeAdapter = gson.getAdapter(TypeToken.get(componentType));
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return new ArrayTypeAdapter(gson, componentTypeAdapter, $Gson$Types.getRawType(componentType));
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}
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};
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private final Class<E> componentType;
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private final TypeAdapter<E> componentTypeAdapter;
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public ArrayTypeAdapter(Gson context, TypeAdapter<E> componentTypeAdapter, Class<E> componentType) {
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this.componentTypeAdapter = new TypeAdapterRuntimeTypeWrapper<E>(context, componentTypeAdapter, componentType);
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this.componentType = componentType;
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}
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@Override
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public Object read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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List<E> list = new ArrayList<E>();
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in.beginArray();
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while (in.hasNext()) {
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E instance = componentTypeAdapter.read(in);
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list.add(instance);
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}
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in.endArray();
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Object array = Array.newInstance(componentType, list.size());
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for (int i = 0; i < list.size(); i++) {
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Array.set(array, i, list.get(i));
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}
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return array;
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}
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@SuppressWarnings("unchecked")
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@Override
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public void write(JsonWriter out, Object array) throws IOException {
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if (array == null) {
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out.nullValue();
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return;
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}
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out.beginArray();
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for (int i = 0, length = Array.getLength(array); i < length; i++) {
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E value = (E) Array.get(array, i);
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componentTypeAdapter.write(out, value);
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}
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out.endArray();
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}
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}
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