691 lines
25 KiB
Java
691 lines
25 KiB
Java
/*
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* Copyright (C) 2008 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.GsonBuilder;
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import com.google.gson.JsonArray;
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import com.google.gson.JsonDeserializationContext;
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import com.google.gson.JsonDeserializer;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonNull;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParseException;
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import com.google.gson.JsonPrimitive;
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import com.google.gson.JsonSyntaxException;
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import com.google.gson.TypeAdapter;
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import com.google.gson.internal.JavaVersion;
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import com.google.gson.reflect.TypeToken;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import java.io.IOException;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Type;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.net.InetAddress;
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import java.net.URI;
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import java.net.URL;
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import java.text.DateFormat;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.BitSet;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Locale;
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import java.util.Properties;
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import java.util.Set;
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import java.util.TimeZone;
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import java.util.TreeSet;
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import java.util.UUID;
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import junit.framework.TestCase;
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/**
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* Functional test for Json serialization and deserialization for common classes for which default
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* support is provided in Gson. The tests for Map types are available in {@link MapTest}.
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*
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* @author Inderjeet Singh
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* @author Joel Leitch
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*/
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public class DefaultTypeAdaptersTest extends TestCase {
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private Gson gson;
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private TimeZone oldTimeZone;
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private Locale oldLocale;
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@Override
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protected void setUp() throws Exception {
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super.setUp();
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this.oldTimeZone = TimeZone.getDefault();
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TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles"));
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this.oldLocale = Locale.getDefault();
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Locale.setDefault(Locale.US);
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gson = new Gson();
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}
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@Override
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protected void tearDown() throws Exception {
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TimeZone.setDefault(oldTimeZone);
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Locale.setDefault(oldLocale);
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super.tearDown();
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}
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public void testClassSerialization() {
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try {
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gson.toJson(String.class);
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fail();
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} catch (UnsupportedOperationException expected) {
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}
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// Override with a custom type adapter for class.
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gson = new GsonBuilder().registerTypeAdapter(Class.class, new MyClassTypeAdapter()).create();
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assertEquals("\"java.lang.String\"", gson.toJson(String.class));
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}
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public void testClassDeserialization() {
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try {
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gson.fromJson("String.class", String.class.getClass());
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fail();
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} catch (UnsupportedOperationException expected) {
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}
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// Override with a custom type adapter for class.
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gson = new GsonBuilder().setLenient().registerTypeAdapter(Class.class, new MyClassTypeAdapter()).create();
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assertEquals(String.class, gson.fromJson("java.lang.String", Class.class));
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}
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public void testUrlSerialization() throws Exception {
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String urlValue = "http://google.com/";
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URL url = new URL(urlValue);
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assertEquals("\"http://google.com/\"", gson.toJson(url));
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}
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public void testUrlDeserialization() {
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String urlValue = "http://google.com/";
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String json = "'http:\\/\\/google.com\\/'";
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URL target = gson.fromJson(json, URL.class);
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assertEquals(urlValue, target.toExternalForm());
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gson.fromJson('"' + urlValue + '"', URL.class);
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assertEquals(urlValue, target.toExternalForm());
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}
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public void testUrlNullSerialization() throws Exception {
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ClassWithUrlField target = new ClassWithUrlField();
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assertEquals("{}", gson.toJson(target));
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}
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public void testUrlNullDeserialization() {
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String json = "{}";
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ClassWithUrlField target = gson.fromJson(json, ClassWithUrlField.class);
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assertNull(target.url);
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}
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private static class ClassWithUrlField {
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URL url;
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}
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public void testUriSerialization() throws Exception {
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String uriValue = "http://google.com/";
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URI uri = new URI(uriValue);
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assertEquals("\"http://google.com/\"", gson.toJson(uri));
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}
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public void testUriDeserialization() {
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String uriValue = "http://google.com/";
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String json = '"' + uriValue + '"';
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URI target = gson.fromJson(json, URI.class);
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assertEquals(uriValue, target.toASCIIString());
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}
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public void testNullSerialization() throws Exception {
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testNullSerializationAndDeserialization(Boolean.class);
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testNullSerializationAndDeserialization(Byte.class);
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testNullSerializationAndDeserialization(Short.class);
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testNullSerializationAndDeserialization(Integer.class);
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testNullSerializationAndDeserialization(Long.class);
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testNullSerializationAndDeserialization(Double.class);
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testNullSerializationAndDeserialization(Float.class);
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testNullSerializationAndDeserialization(Number.class);
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testNullSerializationAndDeserialization(Character.class);
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testNullSerializationAndDeserialization(String.class);
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testNullSerializationAndDeserialization(StringBuilder.class);
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testNullSerializationAndDeserialization(StringBuffer.class);
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testNullSerializationAndDeserialization(BigDecimal.class);
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testNullSerializationAndDeserialization(BigInteger.class);
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testNullSerializationAndDeserialization(TreeSet.class);
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testNullSerializationAndDeserialization(ArrayList.class);
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testNullSerializationAndDeserialization(HashSet.class);
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testNullSerializationAndDeserialization(Properties.class);
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testNullSerializationAndDeserialization(URL.class);
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testNullSerializationAndDeserialization(URI.class);
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testNullSerializationAndDeserialization(UUID.class);
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testNullSerializationAndDeserialization(Locale.class);
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testNullSerializationAndDeserialization(InetAddress.class);
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testNullSerializationAndDeserialization(BitSet.class);
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testNullSerializationAndDeserialization(Date.class);
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testNullSerializationAndDeserialization(GregorianCalendar.class);
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testNullSerializationAndDeserialization(Calendar.class);
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testNullSerializationAndDeserialization(Class.class);
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}
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private void testNullSerializationAndDeserialization(Class<?> c) {
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testNullSerializationAndDeserialization(gson, c);
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}
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public static void testNullSerializationAndDeserialization(Gson gson, Class<?> c) {
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assertEquals("null", gson.toJson(null, c));
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assertEquals(null, gson.fromJson("null", c));
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}
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public void testUuidSerialization() throws Exception {
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String uuidValue = "c237bec1-19ef-4858-a98e-521cf0aad4c0";
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UUID uuid = UUID.fromString(uuidValue);
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assertEquals('"' + uuidValue + '"', gson.toJson(uuid));
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}
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public void testUuidDeserialization() {
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String uuidValue = "c237bec1-19ef-4858-a98e-521cf0aad4c0";
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String json = '"' + uuidValue + '"';
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UUID target = gson.fromJson(json, UUID.class);
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assertEquals(uuidValue, target.toString());
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}
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public void testLocaleSerializationWithLanguage() {
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Locale target = new Locale("en");
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assertEquals("\"en\"", gson.toJson(target));
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}
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public void testLocaleDeserializationWithLanguage() {
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String json = "\"en\"";
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Locale locale = gson.fromJson(json, Locale.class);
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assertEquals("en", locale.getLanguage());
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}
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public void testLocaleSerializationWithLanguageCountry() {
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Locale target = Locale.CANADA_FRENCH;
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assertEquals("\"fr_CA\"", gson.toJson(target));
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}
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public void testLocaleDeserializationWithLanguageCountry() {
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String json = "\"fr_CA\"";
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Locale locale = gson.fromJson(json, Locale.class);
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assertEquals(Locale.CANADA_FRENCH, locale);
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}
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public void testLocaleSerializationWithLanguageCountryVariant() {
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Locale target = new Locale("de", "DE", "EURO");
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String json = gson.toJson(target);
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assertEquals("\"de_DE_EURO\"", json);
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}
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public void testLocaleDeserializationWithLanguageCountryVariant() {
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String json = "\"de_DE_EURO\"";
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Locale locale = gson.fromJson(json, Locale.class);
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assertEquals("de", locale.getLanguage());
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assertEquals("DE", locale.getCountry());
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assertEquals("EURO", locale.getVariant());
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}
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public void testBigDecimalFieldSerialization() {
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ClassWithBigDecimal target = new ClassWithBigDecimal("-122.01e-21");
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String json = gson.toJson(target);
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String actual = json.substring(json.indexOf(':') + 1, json.indexOf('}'));
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assertEquals(target.value, new BigDecimal(actual));
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}
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public void testBigDecimalFieldDeserialization() {
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ClassWithBigDecimal expected = new ClassWithBigDecimal("-122.01e-21");
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String json = expected.getExpectedJson();
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ClassWithBigDecimal actual = gson.fromJson(json, ClassWithBigDecimal.class);
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assertEquals(expected.value, actual.value);
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}
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public void testBadValueForBigDecimalDeserialization() {
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try {
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gson.fromJson("{\"value\"=1.5e-1.0031}", ClassWithBigDecimal.class);
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fail("Exponent of a BigDecimal must be an integer value.");
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} catch (JsonParseException expected) { }
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}
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public void testBigIntegerFieldSerialization() {
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ClassWithBigInteger target = new ClassWithBigInteger("23232323215323234234324324324324324324");
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String json = gson.toJson(target);
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assertEquals(target.getExpectedJson(), json);
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}
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public void testBigIntegerFieldDeserialization() {
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ClassWithBigInteger expected = new ClassWithBigInteger("879697697697697697697697697697697697");
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String json = expected.getExpectedJson();
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ClassWithBigInteger actual = gson.fromJson(json, ClassWithBigInteger.class);
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assertEquals(expected.value, actual.value);
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}
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public void testOverrideBigIntegerTypeAdapter() throws Exception {
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gson = new GsonBuilder()
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.registerTypeAdapter(BigInteger.class, new NumberAsStringAdapter(BigInteger.class))
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.create();
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assertEquals("\"123\"", gson.toJson(new BigInteger("123"), BigInteger.class));
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assertEquals(new BigInteger("123"), gson.fromJson("\"123\"", BigInteger.class));
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}
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public void testOverrideBigDecimalTypeAdapter() throws Exception {
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gson = new GsonBuilder()
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.registerTypeAdapter(BigDecimal.class, new NumberAsStringAdapter(BigDecimal.class))
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.create();
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assertEquals("\"1.1\"", gson.toJson(new BigDecimal("1.1"), BigDecimal.class));
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assertEquals(new BigDecimal("1.1"), gson.fromJson("\"1.1\"", BigDecimal.class));
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}
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public void testSetSerialization() throws Exception {
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Gson gson = new Gson();
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HashSet<String> s = new HashSet<>();
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s.add("blah");
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String json = gson.toJson(s);
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assertEquals("[\"blah\"]", json);
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json = gson.toJson(s, Set.class);
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assertEquals("[\"blah\"]", json);
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}
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public void testBitSetSerialization() throws Exception {
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Gson gson = new Gson();
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BitSet bits = new BitSet();
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bits.set(1);
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bits.set(3, 6);
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bits.set(9);
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String json = gson.toJson(bits);
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assertEquals("[0,1,0,1,1,1,0,0,0,1]", json);
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}
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public void testBitSetDeserialization() throws Exception {
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BitSet expected = new BitSet();
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expected.set(0);
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expected.set(2, 6);
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expected.set(8);
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Gson gson = new Gson();
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String json = gson.toJson(expected);
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assertEquals(expected, gson.fromJson(json, BitSet.class));
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json = "[1,0,1,1,1,1,0,0,1,0,0,0]";
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assertEquals(expected, gson.fromJson(json, BitSet.class));
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json = "[\"1\",\"0\",\"1\",\"1\",\"1\",\"1\",\"0\",\"0\",\"1\"]";
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assertEquals(expected, gson.fromJson(json, BitSet.class));
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json = "[true,false,true,true,true,true,false,false,true,false,false]";
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assertEquals(expected, gson.fromJson(json, BitSet.class));
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try {
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gson.fromJson("[1, []]", BitSet.class);
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fail();
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} catch (JsonSyntaxException e) {
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assertEquals("Invalid bitset value type: BEGIN_ARRAY; at path $[1]", e.getMessage());
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}
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try {
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gson.fromJson("[1, 2]", BitSet.class);
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fail();
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} catch (JsonSyntaxException e) {
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assertEquals("Invalid bitset value 2, expected 0 or 1; at path $[1]", e.getMessage());
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}
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}
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public void testDefaultDateSerialization() {
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Date now = new Date(1315806903103L);
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String json = gson.toJson(now);
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if (JavaVersion.isJava9OrLater()) {
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assertEquals("\"Sep 11, 2011, 10:55:03 PM\"", json);
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} else {
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assertEquals("\"Sep 11, 2011 10:55:03 PM\"", json);
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}
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}
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public void testDefaultDateDeserialization() {
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String json = "'Dec 13, 2009 07:18:02 AM'";
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Date extracted = gson.fromJson(json, Date.class);
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assertEqualsDate(extracted, 2009, 11, 13);
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assertEqualsTime(extracted, 7, 18, 2);
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}
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// Date can not directly be compared with another instance since the deserialization loses the
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// millisecond portion.
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@SuppressWarnings("deprecation")
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public static void assertEqualsDate(Date date, int year, int month, int day) {
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assertEquals(year-1900, date.getYear());
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assertEquals(month, date.getMonth());
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assertEquals(day, date.getDate());
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}
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@SuppressWarnings("deprecation")
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public static void assertEqualsTime(Date date, int hours, int minutes, int seconds) {
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assertEquals(hours, date.getHours());
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assertEquals(minutes, date.getMinutes());
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assertEquals(seconds, date.getSeconds());
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}
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public void testDefaultDateSerializationUsingBuilder() throws Exception {
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Gson gson = new GsonBuilder().create();
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Date now = new Date(1315806903103L);
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String json = gson.toJson(now);
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if (JavaVersion.isJava9OrLater()) {
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assertEquals("\"Sep 11, 2011, 10:55:03 PM\"", json);
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} else {
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assertEquals("\"Sep 11, 2011 10:55:03 PM\"", json);
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}
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}
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public void testDefaultDateDeserializationUsingBuilder() throws Exception {
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Gson gson = new GsonBuilder().create();
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Date now = new Date(1315806903103L);
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String json = gson.toJson(now);
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Date extracted = gson.fromJson(json, Date.class);
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assertEquals(now.toString(), extracted.toString());
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}
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public void testDefaultCalendarSerialization() throws Exception {
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Gson gson = new GsonBuilder().create();
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String json = gson.toJson(Calendar.getInstance());
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assertTrue(json.contains("year"));
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assertTrue(json.contains("month"));
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assertTrue(json.contains("dayOfMonth"));
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assertTrue(json.contains("hourOfDay"));
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assertTrue(json.contains("minute"));
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assertTrue(json.contains("second"));
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}
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public void testDefaultCalendarDeserialization() throws Exception {
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Gson gson = new Gson();
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String json = "{year:2009,month:2,dayOfMonth:11,hourOfDay:14,minute:29,second:23}";
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Calendar cal = gson.fromJson(json, Calendar.class);
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assertEquals(2009, cal.get(Calendar.YEAR));
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assertEquals(2, cal.get(Calendar.MONTH));
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assertEquals(11, cal.get(Calendar.DAY_OF_MONTH));
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assertEquals(14, cal.get(Calendar.HOUR_OF_DAY));
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assertEquals(29, cal.get(Calendar.MINUTE));
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assertEquals(23, cal.get(Calendar.SECOND));
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}
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public void testDefaultGregorianCalendarSerialization() throws Exception {
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Gson gson = new GsonBuilder().create();
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GregorianCalendar cal = new GregorianCalendar();
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String json = gson.toJson(cal);
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assertTrue(json.contains("year"));
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assertTrue(json.contains("month"));
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assertTrue(json.contains("dayOfMonth"));
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assertTrue(json.contains("hourOfDay"));
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assertTrue(json.contains("minute"));
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assertTrue(json.contains("second"));
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}
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public void testDefaultGregorianCalendarDeserialization() throws Exception {
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Gson gson = new Gson();
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String json = "{year:2009,month:2,dayOfMonth:11,hourOfDay:14,minute:29,second:23}";
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GregorianCalendar cal = gson.fromJson(json, GregorianCalendar.class);
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assertEquals(2009, cal.get(Calendar.YEAR));
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assertEquals(2, cal.get(Calendar.MONTH));
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assertEquals(11, cal.get(Calendar.DAY_OF_MONTH));
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assertEquals(14, cal.get(Calendar.HOUR_OF_DAY));
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assertEquals(29, cal.get(Calendar.MINUTE));
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assertEquals(23, cal.get(Calendar.SECOND));
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}
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public void testDateSerializationWithPattern() throws Exception {
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String pattern = "yyyy-MM-dd";
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Gson gson = new GsonBuilder().setDateFormat(DateFormat.FULL).setDateFormat(pattern).create();
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Date now = new Date(1315806903103L);
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String json = gson.toJson(now);
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assertEquals("\"2011-09-11\"", json);
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}
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@SuppressWarnings("deprecation")
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public void testDateDeserializationWithPattern() throws Exception {
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String pattern = "yyyy-MM-dd";
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Gson gson = new GsonBuilder().setDateFormat(DateFormat.FULL).setDateFormat(pattern).create();
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Date now = new Date(1315806903103L);
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String json = gson.toJson(now);
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Date extracted = gson.fromJson(json, Date.class);
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assertEquals(now.getYear(), extracted.getYear());
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assertEquals(now.getMonth(), extracted.getMonth());
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assertEquals(now.getDay(), extracted.getDay());
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}
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public void testDateSerializationWithPatternNotOverridenByTypeAdapter() throws Exception {
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String pattern = "yyyy-MM-dd";
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Gson gson = new GsonBuilder()
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.setDateFormat(pattern)
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.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
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@Override public Date deserialize(JsonElement json, Type typeOfT,
|
|
JsonDeserializationContext context)
|
|
throws JsonParseException {
|
|
return new Date(1315806903103L);
|
|
}
|
|
})
|
|
.create();
|
|
|
|
Date now = new Date(1315806903103L);
|
|
String json = gson.toJson(now);
|
|
assertEquals("\"2011-09-11\"", json);
|
|
}
|
|
|
|
// http://code.google.com/p/google-gson/issues/detail?id=230
|
|
public void testDateSerializationInCollection() throws Exception {
|
|
Type listOfDates = new TypeToken<List<Date>>() {}.getType();
|
|
TimeZone defaultTimeZone = TimeZone.getDefault();
|
|
TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
|
|
Locale defaultLocale = Locale.getDefault();
|
|
Locale.setDefault(Locale.US);
|
|
try {
|
|
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").create();
|
|
List<Date> dates = Arrays.asList(new Date(0));
|
|
String json = gson.toJson(dates, listOfDates);
|
|
assertEquals("[\"1970-01-01\"]", json);
|
|
assertEquals(0L, gson.<List<Date>>fromJson("[\"1970-01-01\"]", listOfDates).get(0).getTime());
|
|
} finally {
|
|
TimeZone.setDefault(defaultTimeZone);
|
|
Locale.setDefault(defaultLocale);
|
|
}
|
|
}
|
|
|
|
public void testJsonPrimitiveSerialization() {
|
|
assertEquals("5", gson.toJson(new JsonPrimitive(5), JsonElement.class));
|
|
assertEquals("true", gson.toJson(new JsonPrimitive(true), JsonElement.class));
|
|
assertEquals("\"foo\"", gson.toJson(new JsonPrimitive("foo"), JsonElement.class));
|
|
assertEquals("\"a\"", gson.toJson(new JsonPrimitive('a'), JsonElement.class));
|
|
}
|
|
|
|
public void testJsonPrimitiveDeserialization() {
|
|
assertEquals(new JsonPrimitive(5), gson.fromJson("5", JsonElement.class));
|
|
assertEquals(new JsonPrimitive(5), gson.fromJson("5", JsonPrimitive.class));
|
|
assertEquals(new JsonPrimitive(true), gson.fromJson("true", JsonElement.class));
|
|
assertEquals(new JsonPrimitive(true), gson.fromJson("true", JsonPrimitive.class));
|
|
assertEquals(new JsonPrimitive("foo"), gson.fromJson("\"foo\"", JsonElement.class));
|
|
assertEquals(new JsonPrimitive("foo"), gson.fromJson("\"foo\"", JsonPrimitive.class));
|
|
assertEquals(new JsonPrimitive('a'), gson.fromJson("\"a\"", JsonElement.class));
|
|
assertEquals(new JsonPrimitive('a'), gson.fromJson("\"a\"", JsonPrimitive.class));
|
|
}
|
|
|
|
public void testJsonNullSerialization() {
|
|
assertEquals("null", gson.toJson(JsonNull.INSTANCE, JsonElement.class));
|
|
assertEquals("null", gson.toJson(JsonNull.INSTANCE, JsonNull.class));
|
|
}
|
|
|
|
public void testNullJsonElementSerialization() {
|
|
assertEquals("null", gson.toJson(null, JsonElement.class));
|
|
assertEquals("null", gson.toJson(null, JsonNull.class));
|
|
}
|
|
|
|
public void testJsonArraySerialization() {
|
|
JsonArray array = new JsonArray();
|
|
array.add(new JsonPrimitive(1));
|
|
array.add(new JsonPrimitive(2));
|
|
array.add(new JsonPrimitive(3));
|
|
assertEquals("[1,2,3]", gson.toJson(array, JsonElement.class));
|
|
}
|
|
|
|
public void testJsonArrayDeserialization() {
|
|
JsonArray array = new JsonArray();
|
|
array.add(new JsonPrimitive(1));
|
|
array.add(new JsonPrimitive(2));
|
|
array.add(new JsonPrimitive(3));
|
|
|
|
String json = "[1,2,3]";
|
|
assertEquals(array, gson.fromJson(json, JsonElement.class));
|
|
assertEquals(array, gson.fromJson(json, JsonArray.class));
|
|
}
|
|
|
|
public void testJsonObjectSerialization() {
|
|
JsonObject object = new JsonObject();
|
|
object.add("foo", new JsonPrimitive(1));
|
|
object.add("bar", new JsonPrimitive(2));
|
|
assertEquals("{\"foo\":1,\"bar\":2}", gson.toJson(object, JsonElement.class));
|
|
}
|
|
|
|
public void testJsonObjectDeserialization() {
|
|
JsonObject object = new JsonObject();
|
|
object.add("foo", new JsonPrimitive(1));
|
|
object.add("bar", new JsonPrimitive(2));
|
|
|
|
String json = "{\"foo\":1,\"bar\":2}";
|
|
JsonElement actual = gson.fromJson(json, JsonElement.class);
|
|
assertEquals(object, actual);
|
|
|
|
JsonObject actualObj = gson.fromJson(json, JsonObject.class);
|
|
assertEquals(object, actualObj);
|
|
}
|
|
|
|
public void testJsonNullDeserialization() {
|
|
assertEquals(JsonNull.INSTANCE, gson.fromJson("null", JsonElement.class));
|
|
assertEquals(JsonNull.INSTANCE, gson.fromJson("null", JsonNull.class));
|
|
}
|
|
|
|
public void testJsonElementTypeMismatch() {
|
|
try {
|
|
gson.fromJson("\"abc\"", JsonObject.class);
|
|
fail();
|
|
} catch (JsonSyntaxException expected) {
|
|
assertEquals("Expected a com.google.gson.JsonObject but was com.google.gson.JsonPrimitive; at path $",
|
|
expected.getMessage());
|
|
}
|
|
}
|
|
|
|
private static class ClassWithBigDecimal {
|
|
BigDecimal value;
|
|
ClassWithBigDecimal(String value) {
|
|
this.value = new BigDecimal(value);
|
|
}
|
|
String getExpectedJson() {
|
|
return "{\"value\":" + value.toEngineeringString() + "}";
|
|
}
|
|
}
|
|
|
|
private static class ClassWithBigInteger {
|
|
BigInteger value;
|
|
ClassWithBigInteger(String value) {
|
|
this.value = new BigInteger(value);
|
|
}
|
|
String getExpectedJson() {
|
|
return "{\"value\":" + value + "}";
|
|
}
|
|
}
|
|
|
|
public void testPropertiesSerialization() {
|
|
Properties props = new Properties();
|
|
props.setProperty("foo", "bar");
|
|
String json = gson.toJson(props);
|
|
String expected = "{\"foo\":\"bar\"}";
|
|
assertEquals(expected, json);
|
|
}
|
|
|
|
public void testPropertiesDeserialization() {
|
|
String json = "{foo:'bar'}";
|
|
Properties props = gson.fromJson(json, Properties.class);
|
|
assertEquals("bar", props.getProperty("foo"));
|
|
}
|
|
|
|
public void testTreeSetSerialization() {
|
|
TreeSet<String> treeSet = new TreeSet<>();
|
|
treeSet.add("Value1");
|
|
String json = gson.toJson(treeSet);
|
|
assertEquals("[\"Value1\"]", json);
|
|
}
|
|
|
|
public void testTreeSetDeserialization() {
|
|
String json = "['Value1']";
|
|
Type type = new TypeToken<TreeSet<String>>() {}.getType();
|
|
TreeSet<String> treeSet = gson.fromJson(json, type);
|
|
assertTrue(treeSet.contains("Value1"));
|
|
}
|
|
|
|
public void testStringBuilderSerialization() {
|
|
StringBuilder sb = new StringBuilder("abc");
|
|
String json = gson.toJson(sb);
|
|
assertEquals("\"abc\"", json);
|
|
}
|
|
|
|
public void testStringBuilderDeserialization() {
|
|
StringBuilder sb = gson.fromJson("'abc'", StringBuilder.class);
|
|
assertEquals("abc", sb.toString());
|
|
}
|
|
|
|
public void testStringBufferSerialization() {
|
|
StringBuffer sb = new StringBuffer("abc");
|
|
String json = gson.toJson(sb);
|
|
assertEquals("\"abc\"", json);
|
|
}
|
|
|
|
public void testStringBufferDeserialization() {
|
|
StringBuffer sb = gson.fromJson("'abc'", StringBuffer.class);
|
|
assertEquals("abc", sb.toString());
|
|
}
|
|
|
|
@SuppressWarnings("rawtypes")
|
|
private static class MyClassTypeAdapter extends TypeAdapter<Class> {
|
|
@Override
|
|
public void write(JsonWriter out, Class value) throws IOException {
|
|
out.value(value.getName());
|
|
}
|
|
@Override
|
|
public Class read(JsonReader in) throws IOException {
|
|
String className = in.nextString();
|
|
try {
|
|
return Class.forName(className);
|
|
} catch (ClassNotFoundException e) {
|
|
throw new IOException(e);
|
|
}
|
|
}
|
|
}
|
|
|
|
static class NumberAsStringAdapter extends TypeAdapter<Number> {
|
|
private final Constructor<? extends Number> constructor;
|
|
NumberAsStringAdapter(Class<? extends Number> type) throws Exception {
|
|
this.constructor = type.getConstructor(String.class);
|
|
}
|
|
@Override public void write(JsonWriter out, Number value) throws IOException {
|
|
out.value(value.toString());
|
|
}
|
|
@Override public Number read(JsonReader in) throws IOException {
|
|
try {
|
|
return constructor.newInstance(in.nextString());
|
|
} catch (Exception e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
}
|
|
}
|