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/*
* Copyright (C) 2016 Gson Authors
*
* 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.typeadapters;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.Arrays;
import java.util.List;
import javax.annotation.PostConstruct;
import junit.framework.TestCase;
public class PostConstructAdapterFactoryTest extends TestCase {
public void test() throws Exception {
Gson gson = new GsonBuilder()
.registerTypeAdapterFactory(new PostConstructAdapterFactory())
.create();
gson.fromJson("{\"bread\": \"white\", \"cheese\": \"cheddar\"}", Sandwich.class);
try {
gson.fromJson("{\"bread\": \"cheesey bread\", \"cheese\": \"swiss\"}", Sandwich.class);
fail();
} catch (IllegalArgumentException expected) {
assertEquals("too cheesey", expected.getMessage());
}
}
public void testList() {
MultipleSandwiches sandwiches = new MultipleSandwiches(Arrays.asList(
new Sandwich("white", "cheddar"),
new Sandwich("whole wheat", "swiss")));
Gson gson = new GsonBuilder().registerTypeAdapterFactory(new PostConstructAdapterFactory()).create();
// Throws NullPointerException without the fix in https://github.com/google/gson/pull/1103
String json = gson.toJson(sandwiches);
assertEquals("{\"sandwiches\":[{\"bread\":\"white\",\"cheese\":\"cheddar\"},{\"bread\":\"whole wheat\",\"cheese\":\"swiss\"}]}", json);
MultipleSandwiches sandwichesFromJson = gson.fromJson(json, MultipleSandwiches.class);
assertEquals(sandwiches, sandwichesFromJson);
}
@SuppressWarnings("overrides") // for missing hashCode() override
static class Sandwich {
public String bread;
public String cheese;
public Sandwich(String bread, String cheese) {
this.bread = bread;
this.cheese = cheese;
}
@PostConstruct private void validate() {
if (bread.equals("cheesey bread") && cheese != null) {
throw new IllegalArgumentException("too cheesey");
}
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof Sandwich)) {
return false;
}
final Sandwich other = (Sandwich) o;
if (this.bread == null ? other.bread != null : !this.bread.equals(other.bread)) {
return false;
}
if (this.cheese == null ? other.cheese != null : !this.cheese.equals(other.cheese)) {
return false;
}
return true;
}
}
@SuppressWarnings("overrides") // for missing hashCode() override
static class MultipleSandwiches {
public List<Sandwich> sandwiches;
public MultipleSandwiches(List<Sandwich> sandwiches) {
this.sandwiches = sandwiches;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof MultipleSandwiches)) {
return false;
}
final MultipleSandwiches other = (MultipleSandwiches) o;
if (this.sandwiches == null ? other.sandwiches != null : !this.sandwiches.equals(other.sandwiches)) {
return false;
}
return true;
}
}
}
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