| /* |
| * Copyright (C) 2012 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.functional; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import junit.framework.TestCase; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import com.google.gson.TypeAdapter; |
| import com.google.gson.TypeAdapterFactory; |
| import com.google.gson.common.TestTypes.BagOfPrimitives; |
| import com.google.gson.reflect.TypeToken; |
| import com.google.gson.stream.JsonReader; |
| import com.google.gson.stream.JsonWriter; |
| |
| /** |
| * Functional tests for {@link Gson#getDelegateAdapter(TypeAdapterFactory, TypeToken)} method. |
| * |
| * @author Inderjeet Singh |
| */ |
| public class DelegateTypeAdapterTest extends TestCase { |
| |
| private StatsTypeAdapterFactory stats; |
| private Gson gson; |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| stats = new StatsTypeAdapterFactory(); |
| gson = new GsonBuilder() |
| .registerTypeAdapterFactory(stats) |
| .create(); |
| } |
| |
| public void testDelegateInvoked() { |
| List<BagOfPrimitives> bags = new ArrayList<>(); |
| for (int i = 0; i < 10; ++i) { |
| bags.add(new BagOfPrimitives(i, i, i % 2 == 0, String.valueOf(i))); |
| } |
| String json = gson.toJson(bags); |
| bags = gson.fromJson(json, new TypeToken<List<BagOfPrimitives>>(){}.getType()); |
| // 11: 1 list object, and 10 entries. stats invoked on all 5 fields |
| assertEquals(51, stats.numReads); |
| assertEquals(51, stats.numWrites); |
| } |
| |
| public void testDelegateInvokedOnStrings() { |
| String[] bags = {"1", "2", "3", "4"}; |
| String json = gson.toJson(bags); |
| bags = gson.fromJson(json, String[].class); |
| // 1 array object with 4 elements. |
| assertEquals(5, stats.numReads); |
| assertEquals(5, stats.numWrites); |
| } |
| |
| private static class StatsTypeAdapterFactory implements TypeAdapterFactory { |
| public int numReads = 0; |
| public int numWrites = 0; |
| |
| @Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { |
| final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); |
| return new TypeAdapter<T>() { |
| @Override |
| public void write(JsonWriter out, T value) throws IOException { |
| ++numWrites; |
| delegate.write(out, value); |
| } |
| |
| @Override |
| public T read(JsonReader in) throws IOException { |
| ++numReads; |
| return delegate.read(in); |
| } |
| }; |
| } |
| } |
| } |