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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.gson;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;
import java.util.ArrayList;
import java.util.List;
import lombok.ToString;
import org.junit.Test;
import org.onap.policy.common.gson.annotation.GsonJsonIgnore;
import org.onap.policy.common.gson.annotation.GsonJsonProperty;
public class JacksonFieldAdapterFactoryTest {
private static JacksonFieldAdapterFactory factory = new JacksonFieldAdapterFactory();
private static Gson gson = new GsonBuilder().setExclusionStrategies(new JacksonExclusionStrategy())
.registerTypeAdapterFactory(factory).create();
@Test
public void testCreate() {
// unhandled types
assertNull(factory.create(gson, TypeToken.get(JsonElement.class)));
assertNull(factory.create(gson, TypeToken.get(NothingToSerialize.class)));
assertNotNull(factory.create(gson, TypeToken.get(Data.class)));
assertNotNull(factory.create(gson, TypeToken.get(Derived.class)));
Data data = new Data();
// deserialize using fields that aren't in the Data object
Data data2 = gson.fromJson("{\"abc\":100}", Data.class);
assertEquals(data.toString(), data2.toString());
// now work with valid fields
data.id = 10;
data.text = "hello";
String result = gson.toJson(data);
data2 = gson.fromJson(result, Data.class);
assertEquals(data.toString(), data2.toString());
// should also work with derived types
Derived der = new Derived();
der.setId(20);
der.text = "world";
der.unserialized = "abc";
result = gson.toJson(der);
// should not contain the unserialized field
assertFalse(result.contains("abc"));
Derived der2 = gson.fromJson(result, Derived.class);
der.unserialized = null;
assertEquals(der.toString(), der2.toString());
}
@Test
public void testCreate_Lists() {
DataList lst = new DataList();
lst.theList = new ArrayList<>();
lst.theList.add(new Data(200, "text 20"));
lst.theList.add(new Data(210, "text 21"));
String result = gson.toJson(lst);
assertEquals("{'theList':[{'my-id':200,'text':'text 20'},{'my-id':210,'text':'text 21'}]}".replace('\'', '"'),
result);
DataList lst2 = gson.fromJson(result, DataList.class);
assertEquals(stripIdent(lst.toString()), stripIdent(lst2.toString()));
assertEquals(Data.class, lst2.theList.get(0).getClass());
}
@Test
public void testCreate_OnlyOutProps() {
InFieldIgnored data = new InFieldIgnored();
data.value = "out only";
// field should be serialized
String result = gson.toJson(data);
assertEquals("{'value':'out only'}".replace('\'', '"'), result);
// field should NOT be deserialized
data = gson.fromJson(result, InFieldIgnored.class);
assertNull(data.value);
}
@Test
public void testCreate_OnlyInProps() {
OutFieldIgnored data = new OutFieldIgnored();
data.value = "in only";
// field should NOT be serialized
String result = gson.toJson(data);
assertEquals("{}", result);
// field should NOT be deserialized
data = gson.fromJson("{'value':'in only'}".replace('\'', '"'), OutFieldIgnored.class);
assertEquals("in only", data.value);
}
/**
* Object identifiers may change with each execution, so this method is used to strip
* the identifier from the text string so that the strings will still match across
* different runs.
*
* @param text text from which to strip the identifier
* @return the text, without the identifier
*/
private String stripIdent(String text) {
return text.replaceFirst("@\\w+", "@");
}
@ToString
private static class Data {
@GsonJsonProperty("my-id")
private int id;
public String text;
public Data() {
super();
}
public Data(int id, String text) {
this.id = id;
this.text = text;
}
public void setId(int id) {
this.id = id;
}
}
@ToString(callSuper = true)
private static class Derived extends Data {
// not serialized
private String unserialized;
}
private static class DataList {
@GsonJsonProperty
private List<Data> theList;
}
protected static class NothingToSerialize {
// not serialized
protected String unserialized;
}
/**
* This has a field that should show up in the "output" list, but not in the "input"
* list, because the method will override it.
*/
private static class InFieldIgnored {
@GsonJsonProperty("value")
private String value;
@GsonJsonIgnore
public void setValue(String value) {
this.value = value;
}
}
/**
* This has a field that should show up in the "input" list, but not in the "output"
* list, because the method will override it.
*/
private static class OutFieldIgnored {
@GsonJsonProperty("value")
private String value;
@GsonJsonIgnore
public String getValue() {
return value;
}
}
}
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