141 lines
3.7 KiB
Java
141 lines
3.7 KiB
Java
/*
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* Copyright (C) 2010 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 com.google.gson.functional;
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import com.google.gson.Gson;
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import com.google.gson.reflect.TypeToken;
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import java.lang.reflect.Type;
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import java.util.Arrays;
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import junit.framework.TestCase;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Functional test for Gson serialization and deserialization of
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* classes with type variables.
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*
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* @author Joel Leitch
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*/
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public class TypeVariableTest extends TestCase {
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public void testAdvancedTypeVariables() throws Exception {
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Gson gson = new Gson();
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Bar bar1 = new Bar("someString", 1, true);
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ArrayList<Integer> arrayList = new ArrayList<>();
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arrayList.add(1);
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arrayList.add(2);
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arrayList.add(3);
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bar1.map.put("key1", arrayList);
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bar1.map.put("key2", new ArrayList<Integer>());
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String json = gson.toJson(bar1);
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Bar bar2 = gson.fromJson(json, Bar.class);
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assertEquals(bar1, bar2);
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}
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public void testTypeVariablesViaTypeParameter() throws Exception {
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Gson gson = new Gson();
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Foo<String, Integer> original = new Foo<>("e", 5, false);
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original.map.put("f", Arrays.asList(6, 7));
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Type type = new TypeToken<Foo<String, Integer>>() {}.getType();
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String json = gson.toJson(original, type);
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assertEquals("{\"someSField\":\"e\",\"someTField\":5,\"map\":{\"f\":[6,7]},\"redField\":false}",
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json);
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assertEquals(original, gson.<Foo<String, Integer>>fromJson(json, type));
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}
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public void testBasicTypeVariables() throws Exception {
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Gson gson = new Gson();
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Blue blue1 = new Blue(true);
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String json = gson.toJson(blue1);
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Blue blue2 = gson.fromJson(json, Blue.class);
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assertEquals(blue1, blue2);
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}
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public static class Blue extends Red<Boolean> {
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public Blue() {
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super(false);
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}
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public Blue(boolean value) {
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super(value);
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}
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// Technically, we should implement hashcode too
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof Blue)) {
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return false;
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}
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Blue blue = (Blue) o;
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return redField.equals(blue.redField);
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}
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}
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public static class Red<S> {
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protected S redField;
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public Red() {}
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public Red(S redField) {
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this.redField = redField;
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}
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}
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public static class Foo<S, T> extends Red<Boolean> {
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private S someSField;
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private T someTField;
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public final Map<S, List<T>> map = new HashMap<>();
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public Foo() {}
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public Foo(S sValue, T tValue, Boolean redField) {
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super(redField);
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this.someSField = sValue;
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this.someTField = tValue;
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}
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// Technically, we should implement hashcode too
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@Override
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@SuppressWarnings("unchecked")
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public boolean equals(Object o) {
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if (!(o instanceof Foo<?, ?>)) {
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return false;
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}
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Foo<S, T> realFoo = (Foo<S, T>) o;
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return redField.equals(realFoo.redField)
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&& someTField.equals(realFoo.someTField)
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&& someSField.equals(realFoo.someSField)
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&& map.equals(realFoo.map);
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}
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}
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public static class Bar extends Foo<String, Integer> {
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public Bar() {
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this("", 0, false);
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}
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public Bar(String s, Integer i, boolean b) {
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super(s, i, b);
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}
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}
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}
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