+++ /dev/null
-/*
- * 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 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.internal.ConstructorConstructor;
-import com.google.gson.internal.ObjectConstructor;
-import com.google.gson.reflect.TypeToken;
-import com.google.gson.stream.JsonReader;
-import com.google.gson.stream.JsonToken;
-import com.google.gson.stream.JsonWriter;
-import java.io.IOException;
-import java.lang.reflect.Type;
-import java.util.Collection;
-
-/**
- * Adapt a homogeneous collection of objects.
- */
-public final class CollectionTypeAdapterFactory implements TypeAdapterFactory {
- private final ConstructorConstructor constructorConstructor;
-
- public CollectionTypeAdapterFactory(ConstructorConstructor constructorConstructor) {
- this.constructorConstructor = constructorConstructor;
- }
-
- public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
- Type type = typeToken.getType();
-
- Class<? super T> rawType = typeToken.getRawType();
- if (!Collection.class.isAssignableFrom(rawType)) {
- return null;
- }
-
- Type elementType = $Gson$Types.getCollectionElementType(type, rawType);
- TypeAdapter<?> elementTypeAdapter = gson.getAdapter(TypeToken.get(elementType));
- ObjectConstructor<T> constructor = constructorConstructor.get(typeToken);
-
- @SuppressWarnings({"unchecked", "rawtypes"}) // create() doesn't define a type parameter
- TypeAdapter<T> result = new Adapter(gson, elementType, elementTypeAdapter, constructor);
- return result;
- }
-
- private static final class Adapter<E> extends TypeAdapter<Collection<E>> {
- private final TypeAdapter<E> elementTypeAdapter;
- private final ObjectConstructor<? extends Collection<E>> constructor;
-
- public Adapter(Gson context, Type elementType,
- TypeAdapter<E> elementTypeAdapter,
- ObjectConstructor<? extends Collection<E>> constructor) {
- this.elementTypeAdapter =
- new TypeAdapterRuntimeTypeWrapper<E>(context, elementTypeAdapter, elementType);
- this.constructor = constructor;
- }
-
- public Collection<E> read(JsonReader in) throws IOException {
- if (in.peek() == JsonToken.NULL) {
- in.nextNull();
- return null;
- }
-
- Collection<E> collection = constructor.construct();
- in.beginArray();
- while (in.hasNext()) {
- E instance = elementTypeAdapter.read(in);
- collection.add(instance);
- }
- in.endArray();
- return collection;
- }
-
- public void write(JsonWriter out, Collection<E> collection) throws IOException {
- if (collection == null) {
- out.nullValue();
- return;
- }
-
- out.beginArray();
- for (E element : collection) {
- elementTypeAdapter.write(out, element);
- }
- out.endArray();
- }
- }
-}