mirror of
https://github.com/commons-app/apps-android-commons.git
synced 2025-10-29 13:53:54 +01:00
Converted type adapters
This commit is contained in:
Paul Hawke
parent
a5fb255bb3
commit
85dda964bc
8 changed files with 353 additions and 365 deletions
|
|
@ -1,29 +0,0 @@
|
|||
package fr.free.nrw.commons.wikidata.json;
|
||||
|
||||
import com.google.gson.TypeAdapter;
|
||||
import com.google.gson.stream.JsonReader;
|
||||
import com.google.gson.stream.JsonToken;
|
||||
import com.google.gson.stream.JsonWriter;
|
||||
|
||||
import fr.free.nrw.commons.wikidata.model.page.Namespace;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
public class NamespaceTypeAdapter extends TypeAdapter<Namespace> {
|
||||
|
||||
@Override
|
||||
public void write(JsonWriter out, Namespace namespace) throws IOException {
|
||||
out.value(namespace.code());
|
||||
}
|
||||
|
||||
@Override
|
||||
public Namespace read(JsonReader in) throws IOException {
|
||||
if (in.peek() == JsonToken.STRING) {
|
||||
// Prior to 3210ce44, we marshaled Namespace as the name string of the enum, instead of
|
||||
// the code number. This introduces a backwards-compatible check for the string value.
|
||||
// TODO: remove after April 2017, when all older namespaces have been deserialized.
|
||||
return Namespace.valueOf(in.nextString());
|
||||
}
|
||||
return Namespace.of(in.nextInt());
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
package fr.free.nrw.commons.wikidata.json
|
||||
|
||||
import com.google.gson.TypeAdapter
|
||||
import com.google.gson.stream.JsonReader
|
||||
import com.google.gson.stream.JsonToken
|
||||
import com.google.gson.stream.JsonWriter
|
||||
import fr.free.nrw.commons.wikidata.model.page.Namespace
|
||||
import java.io.IOException
|
||||
|
||||
class NamespaceTypeAdapter : TypeAdapter<Namespace>() {
|
||||
@Throws(IOException::class)
|
||||
override fun write(out: JsonWriter, namespace: Namespace) {
|
||||
out.value(namespace.code().toLong())
|
||||
}
|
||||
|
||||
@Throws(IOException::class)
|
||||
override fun read(reader: JsonReader): Namespace {
|
||||
if (reader.peek() == JsonToken.STRING) {
|
||||
// Prior to 3210ce44, we marshaled Namespace as the name string of the enum, instead of
|
||||
// the code number. This introduces a backwards-compatible check for the string value.
|
||||
// TODO: remove after April 2017, when all older namespaces have been deserialized.
|
||||
return Namespace.valueOf(reader.nextString())
|
||||
}
|
||||
return Namespace.of(reader.nextInt())
|
||||
}
|
||||
}
|
||||
|
|
@ -1,34 +0,0 @@
|
|||
package fr.free.nrw.commons.wikidata.json;
|
||||
|
||||
import com.google.gson.Gson;
|
||||
import com.google.gson.TypeAdapter;
|
||||
import com.google.gson.TypeAdapterFactory;
|
||||
import com.google.gson.reflect.TypeToken;
|
||||
import com.google.gson.stream.JsonReader;
|
||||
import com.google.gson.stream.JsonWriter;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
public class PostProcessingTypeAdapter implements TypeAdapterFactory {
|
||||
public interface PostProcessable {
|
||||
void postProcess();
|
||||
}
|
||||
|
||||
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
|
||||
final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
|
||||
|
||||
return new TypeAdapter<T>() {
|
||||
public void write(JsonWriter out, T value) throws IOException {
|
||||
delegate.write(out, value);
|
||||
}
|
||||
|
||||
public T read(JsonReader in) throws IOException {
|
||||
T obj = delegate.read(in);
|
||||
if (obj instanceof PostProcessable) {
|
||||
((PostProcessable)obj).postProcess();
|
||||
}
|
||||
return obj;
|
||||
}
|
||||
};
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,35 @@
|
|||
package fr.free.nrw.commons.wikidata.json
|
||||
|
||||
import com.google.gson.Gson
|
||||
import com.google.gson.TypeAdapter
|
||||
import com.google.gson.TypeAdapterFactory
|
||||
import com.google.gson.reflect.TypeToken
|
||||
import com.google.gson.stream.JsonReader
|
||||
import com.google.gson.stream.JsonWriter
|
||||
import java.io.IOException
|
||||
|
||||
class PostProcessingTypeAdapter : TypeAdapterFactory {
|
||||
interface PostProcessable {
|
||||
fun postProcess()
|
||||
}
|
||||
|
||||
override fun <T> create(gson: Gson, type: TypeToken<T>): TypeAdapter<T> {
|
||||
val delegate = gson.getDelegateAdapter(this, type)
|
||||
|
||||
return object : TypeAdapter<T>() {
|
||||
@Throws(IOException::class)
|
||||
override fun write(out: JsonWriter, value: T) {
|
||||
delegate.write(out, value)
|
||||
}
|
||||
|
||||
@Throws(IOException::class)
|
||||
override fun read(reader: JsonReader): T {
|
||||
val obj = delegate.read(reader)
|
||||
if (obj is PostProcessable) {
|
||||
(obj as PostProcessable).postProcess()
|
||||
}
|
||||
return obj
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,280 +0,0 @@
|
|||
package fr.free.nrw.commons.wikidata.json;
|
||||
|
||||
/*
|
||||
* Copyright (C) 2011 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.
|
||||
*/
|
||||
|
||||
import android.util.Log;
|
||||
import java.io.IOException;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.Map;
|
||||
|
||||
import com.google.gson.Gson;
|
||||
import com.google.gson.JsonElement;
|
||||
import com.google.gson.JsonObject;
|
||||
import com.google.gson.JsonParseException;
|
||||
import com.google.gson.JsonPrimitive;
|
||||
import com.google.gson.TypeAdapter;
|
||||
import com.google.gson.TypeAdapterFactory;
|
||||
import com.google.gson.internal.Streams;
|
||||
import com.google.gson.reflect.TypeToken;
|
||||
import com.google.gson.stream.JsonReader;
|
||||
import com.google.gson.stream.JsonWriter;
|
||||
|
||||
/**
|
||||
* Adapts values whose runtime type may differ from their declaration type. This
|
||||
* is necessary when a field's type is not the same type that GSON should create
|
||||
* when deserializing that field. For example, consider these types:
|
||||
* <pre> {@code
|
||||
* abstract class Shape {
|
||||
* int x;
|
||||
* int y;
|
||||
* }
|
||||
* class Circle extends Shape {
|
||||
* int radius;
|
||||
* }
|
||||
* class Rectangle extends Shape {
|
||||
* int width;
|
||||
* int height;
|
||||
* }
|
||||
* class Diamond extends Shape {
|
||||
* int width;
|
||||
* int height;
|
||||
* }
|
||||
* class Drawing {
|
||||
* Shape bottomShape;
|
||||
* Shape topShape;
|
||||
* }
|
||||
* }</pre>
|
||||
* <p>Without additional type information, the serialized JSON is ambiguous. Is
|
||||
* the bottom shape in this drawing a rectangle or a diamond? <pre> {@code
|
||||
* {
|
||||
* "bottomShape": {
|
||||
* "width": 10,
|
||||
* "height": 5,
|
||||
* "x": 0,
|
||||
* "y": 0
|
||||
* },
|
||||
* "topShape": {
|
||||
* "radius": 2,
|
||||
* "x": 4,
|
||||
* "y": 1
|
||||
* }
|
||||
* }}</pre>
|
||||
* This class addresses this problem by adding type information to the
|
||||
* serialized JSON and honoring that type information when the JSON is
|
||||
* deserialized: <pre> {@code
|
||||
* {
|
||||
* "bottomShape": {
|
||||
* "type": "Diamond",
|
||||
* "width": 10,
|
||||
* "height": 5,
|
||||
* "x": 0,
|
||||
* "y": 0
|
||||
* },
|
||||
* "topShape": {
|
||||
* "type": "Circle",
|
||||
* "radius": 2,
|
||||
* "x": 4,
|
||||
* "y": 1
|
||||
* }
|
||||
* }}</pre>
|
||||
* Both the type field name ({@code "type"}) and the type labels ({@code
|
||||
* "Rectangle"}) are configurable.
|
||||
*
|
||||
* <h3>Registering Types</h3>
|
||||
* Create a {@code RuntimeTypeAdapterFactory} by passing the base type and type field
|
||||
* name to the {@link #of} factory method. If you don't supply an explicit type
|
||||
* field name, {@code "type"} will be used. <pre> {@code
|
||||
* RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory
|
||||
* = RuntimeTypeAdapterFactory.of(Shape.class, "type");
|
||||
* }</pre>
|
||||
* Next register all of your subtypes. Every subtype must be explicitly
|
||||
* registered. This protects your application from injection attacks. If you
|
||||
* don't supply an explicit type label, the type's simple name will be used.
|
||||
* <pre> {@code
|
||||
* shapeAdapterFactory.registerSubtype(Rectangle.class, "Rectangle");
|
||||
* shapeAdapterFactory.registerSubtype(Circle.class, "Circle");
|
||||
* shapeAdapterFactory.registerSubtype(Diamond.class, "Diamond");
|
||||
* }</pre>
|
||||
* Finally, register the type adapter factory in your application's GSON builder:
|
||||
* <pre> {@code
|
||||
* Gson gson = new GsonBuilder()
|
||||
* .registerTypeAdapterFactory(shapeAdapterFactory)
|
||||
* .create();
|
||||
* }</pre>
|
||||
* Like {@code GsonBuilder}, this API supports chaining: <pre> {@code
|
||||
* RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory = RuntimeTypeAdapterFactory.of(Shape.class)
|
||||
* .registerSubtype(Rectangle.class)
|
||||
* .registerSubtype(Circle.class)
|
||||
* .registerSubtype(Diamond.class);
|
||||
* }</pre>
|
||||
*
|
||||
* <h3>Serialization and deserialization</h3>
|
||||
* In order to serialize and deserialize a polymorphic object,
|
||||
* you must specify the base type explicitly.
|
||||
* <pre> {@code
|
||||
* Diamond diamond = new Diamond();
|
||||
* String json = gson.toJson(diamond, Shape.class);
|
||||
* }</pre>
|
||||
* And then:
|
||||
* <pre> {@code
|
||||
* Shape shape = gson.fromJson(json, Shape.class);
|
||||
* }</pre>
|
||||
*/
|
||||
public final class RuntimeTypeAdapterFactory<T> implements TypeAdapterFactory {
|
||||
private final Class<?> baseType;
|
||||
private final String typeFieldName;
|
||||
private final Map<String, Class<?>> labelToSubtype = new LinkedHashMap<String, Class<?>>();
|
||||
private final Map<Class<?>, String> subtypeToLabel = new LinkedHashMap<Class<?>, String>();
|
||||
private final boolean maintainType;
|
||||
|
||||
private RuntimeTypeAdapterFactory(Class<?> baseType, String typeFieldName, boolean maintainType) {
|
||||
if (typeFieldName == null || baseType == null) {
|
||||
throw new NullPointerException();
|
||||
}
|
||||
this.baseType = baseType;
|
||||
this.typeFieldName = typeFieldName;
|
||||
this.maintainType = maintainType;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a new runtime type adapter using for {@code baseType} using {@code
|
||||
* typeFieldName} as the type field name. Type field names are case sensitive.
|
||||
* {@code maintainType} flag decide if the type will be stored in pojo or not.
|
||||
*/
|
||||
public static <T> RuntimeTypeAdapterFactory<T> of(Class<T> baseType, String typeFieldName, boolean maintainType) {
|
||||
return new RuntimeTypeAdapterFactory<T>(baseType, typeFieldName, maintainType);
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a new runtime type adapter using for {@code baseType} using {@code
|
||||
* typeFieldName} as the type field name. Type field names are case sensitive.
|
||||
*/
|
||||
public static <T> RuntimeTypeAdapterFactory<T> of(Class<T> baseType, String typeFieldName) {
|
||||
return new RuntimeTypeAdapterFactory<T>(baseType, typeFieldName, false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a new runtime type adapter for {@code baseType} using {@code "type"} as
|
||||
* the type field name.
|
||||
*/
|
||||
public static <T> RuntimeTypeAdapterFactory<T> of(Class<T> baseType) {
|
||||
return new RuntimeTypeAdapterFactory<T>(baseType, "type", false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers {@code type} identified by {@code label}. Labels are case
|
||||
* sensitive.
|
||||
*
|
||||
* @throws IllegalArgumentException if either {@code type} or {@code label}
|
||||
* have already been registered on this type adapter.
|
||||
*/
|
||||
public RuntimeTypeAdapterFactory<T> registerSubtype(Class<? extends T> type, String label) {
|
||||
if (type == null || label == null) {
|
||||
throw new NullPointerException();
|
||||
}
|
||||
if (subtypeToLabel.containsKey(type) || labelToSubtype.containsKey(label)) {
|
||||
throw new IllegalArgumentException("types and labels must be unique");
|
||||
}
|
||||
labelToSubtype.put(label, type);
|
||||
subtypeToLabel.put(type, label);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers {@code type} identified by its {@link Class#getSimpleName simple
|
||||
* name}. Labels are case sensitive.
|
||||
*
|
||||
* @throws IllegalArgumentException if either {@code type} or its simple name
|
||||
* have already been registered on this type adapter.
|
||||
*/
|
||||
public RuntimeTypeAdapterFactory<T> registerSubtype(Class<? extends T> type) {
|
||||
return registerSubtype(type, type.getSimpleName());
|
||||
}
|
||||
|
||||
public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) {
|
||||
if (type.getRawType() != baseType) {
|
||||
return null;
|
||||
}
|
||||
|
||||
final Map<String, TypeAdapter<?>> labelToDelegate
|
||||
= new LinkedHashMap<String, TypeAdapter<?>>();
|
||||
final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate
|
||||
= new LinkedHashMap<Class<?>, TypeAdapter<?>>();
|
||||
for (Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) {
|
||||
TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue()));
|
||||
labelToDelegate.put(entry.getKey(), delegate);
|
||||
subtypeToDelegate.put(entry.getValue(), delegate);
|
||||
}
|
||||
|
||||
return new TypeAdapter<R>() {
|
||||
@Override public R read(JsonReader in) throws IOException {
|
||||
JsonElement jsonElement = Streams.parse(in);
|
||||
JsonElement labelJsonElement;
|
||||
if (maintainType) {
|
||||
labelJsonElement = jsonElement.getAsJsonObject().get(typeFieldName);
|
||||
} else {
|
||||
labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName);
|
||||
}
|
||||
|
||||
if (labelJsonElement == null) {
|
||||
throw new JsonParseException("cannot deserialize " + baseType
|
||||
+ " because it does not define a field named " + typeFieldName);
|
||||
}
|
||||
String label = labelJsonElement.getAsString();
|
||||
@SuppressWarnings("unchecked") // registration requires that subtype extends T
|
||||
TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label);
|
||||
if (delegate == null) {
|
||||
|
||||
Log.e("RuntimeTypeAdapter", "cannot deserialize " + baseType + " subtype named "
|
||||
+ label + "; did you forget to register a subtype? " +jsonElement);
|
||||
return null;
|
||||
}
|
||||
return delegate.fromJsonTree(jsonElement);
|
||||
}
|
||||
|
||||
@Override public void write(JsonWriter out, R value) throws IOException {
|
||||
Class<?> srcType = value.getClass();
|
||||
String label = subtypeToLabel.get(srcType);
|
||||
@SuppressWarnings("unchecked") // registration requires that subtype extends T
|
||||
TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType);
|
||||
if (delegate == null) {
|
||||
throw new JsonParseException("cannot serialize " + srcType.getName()
|
||||
+ "; did you forget to register a subtype?");
|
||||
}
|
||||
JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject();
|
||||
|
||||
if (maintainType) {
|
||||
Streams.write(jsonObject, out);
|
||||
return;
|
||||
}
|
||||
|
||||
JsonObject clone = new JsonObject();
|
||||
|
||||
if (jsonObject.has(typeFieldName)) {
|
||||
throw new JsonParseException("cannot serialize " + srcType.getName()
|
||||
+ " because it already defines a field named " + typeFieldName);
|
||||
}
|
||||
clone.add(typeFieldName, new JsonPrimitive(label));
|
||||
|
||||
for (Map.Entry<String, JsonElement> e : jsonObject.entrySet()) {
|
||||
clone.add(e.getKey(), e.getValue());
|
||||
}
|
||||
Streams.write(clone, out);
|
||||
}
|
||||
}.nullSafe();
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,273 @@
|
|||
package fr.free.nrw.commons.wikidata.json
|
||||
|
||||
import com.google.gson.Gson
|
||||
import com.google.gson.JsonObject
|
||||
import com.google.gson.JsonParseException
|
||||
import com.google.gson.JsonPrimitive
|
||||
import com.google.gson.TypeAdapter
|
||||
import com.google.gson.TypeAdapterFactory
|
||||
import com.google.gson.internal.Streams
|
||||
import com.google.gson.reflect.TypeToken
|
||||
import com.google.gson.stream.JsonReader
|
||||
import com.google.gson.stream.JsonWriter
|
||||
import timber.log.Timber
|
||||
import java.io.IOException
|
||||
|
||||
/*
|
||||
* Copyright (C) 2011 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Adapts values whose runtime type may differ from their declaration type. This
|
||||
* is necessary when a field's type is not the same type that GSON should create
|
||||
* when deserializing that field. For example, consider these types:
|
||||
* <pre> `abstract class Shape {
|
||||
* int x;
|
||||
* int y;
|
||||
* }
|
||||
* class Circle extends Shape {
|
||||
* int radius;
|
||||
* }
|
||||
* class Rectangle extends Shape {
|
||||
* int width;
|
||||
* int height;
|
||||
* }
|
||||
* class Diamond extends Shape {
|
||||
* int width;
|
||||
* int height;
|
||||
* }
|
||||
* class Drawing {
|
||||
* Shape bottomShape;
|
||||
* Shape topShape;
|
||||
* }
|
||||
`</pre> *
|
||||
*
|
||||
* Without additional type information, the serialized JSON is ambiguous. Is
|
||||
* the bottom shape in this drawing a rectangle or a diamond? <pre> `{
|
||||
* "bottomShape": {
|
||||
* "width": 10,
|
||||
* "height": 5,
|
||||
* "x": 0,
|
||||
* "y": 0
|
||||
* },
|
||||
* "topShape": {
|
||||
* "radius": 2,
|
||||
* "x": 4,
|
||||
* "y": 1
|
||||
* }
|
||||
* }`</pre>
|
||||
* This class addresses this problem by adding type information to the
|
||||
* serialized JSON and honoring that type information when the JSON is
|
||||
* deserialized: <pre> `{
|
||||
* "bottomShape": {
|
||||
* "type": "Diamond",
|
||||
* "width": 10,
|
||||
* "height": 5,
|
||||
* "x": 0,
|
||||
* "y": 0
|
||||
* },
|
||||
* "topShape": {
|
||||
* "type": "Circle",
|
||||
* "radius": 2,
|
||||
* "x": 4,
|
||||
* "y": 1
|
||||
* }
|
||||
* }`</pre>
|
||||
* Both the type field name (`"type"`) and the type labels (`"Rectangle"`) are configurable.
|
||||
*
|
||||
* <h3>Registering Types</h3>
|
||||
* Create a `RuntimeTypeAdapterFactory` by passing the base type and type field
|
||||
* name to the [.of] factory method. If you don't supply an explicit type
|
||||
* field name, `"type"` will be used. <pre> `RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory
|
||||
* = RuntimeTypeAdapterFactory.of(Shape.class, "type");
|
||||
`</pre> *
|
||||
* Next register all of your subtypes. Every subtype must be explicitly
|
||||
* registered. This protects your application from injection attacks. If you
|
||||
* don't supply an explicit type label, the type's simple name will be used.
|
||||
* <pre> `shapeAdapterFactory.registerSubtype(Rectangle.class, "Rectangle");
|
||||
* shapeAdapterFactory.registerSubtype(Circle.class, "Circle");
|
||||
* shapeAdapterFactory.registerSubtype(Diamond.class, "Diamond");
|
||||
`</pre> *
|
||||
* Finally, register the type adapter factory in your application's GSON builder:
|
||||
* <pre> `Gson gson = new GsonBuilder()
|
||||
* .registerTypeAdapterFactory(shapeAdapterFactory)
|
||||
* .create();
|
||||
`</pre> *
|
||||
* Like `GsonBuilder`, this API supports chaining: <pre> `RuntimeTypeAdapterFactory<Shape> shapeAdapterFactory = RuntimeTypeAdapterFactory.of(Shape.class)
|
||||
* .registerSubtype(Rectangle.class)
|
||||
* .registerSubtype(Circle.class)
|
||||
* .registerSubtype(Diamond.class);
|
||||
`</pre> *
|
||||
*
|
||||
* <h3>Serialization and deserialization</h3>
|
||||
* In order to serialize and deserialize a polymorphic object,
|
||||
* you must specify the base type explicitly.
|
||||
* <pre> `Diamond diamond = new Diamond();
|
||||
* String json = gson.toJson(diamond, Shape.class);
|
||||
`</pre> *
|
||||
* And then:
|
||||
* <pre> `Shape shape = gson.fromJson(json, Shape.class);
|
||||
`</pre> *
|
||||
*/
|
||||
class RuntimeTypeAdapterFactory<T>(
|
||||
baseType: Class<*>?,
|
||||
typeFieldName: String?,
|
||||
maintainType: Boolean
|
||||
) : TypeAdapterFactory {
|
||||
|
||||
private val baseType: Class<*>
|
||||
private val typeFieldName: String
|
||||
private val labelToSubtype = mutableMapOf<String, Class<*>>()
|
||||
private val subtypeToLabel = mutableMapOf<Class<*>, String>()
|
||||
private val maintainType: Boolean
|
||||
|
||||
init {
|
||||
if (typeFieldName == null || baseType == null) {
|
||||
throw NullPointerException()
|
||||
}
|
||||
this.baseType = baseType
|
||||
this.typeFieldName = typeFieldName
|
||||
this.maintainType = maintainType
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers `type` identified by `label`. Labels are case
|
||||
* sensitive.
|
||||
*
|
||||
* @throws IllegalArgumentException if either `type` or `label`
|
||||
* have already been registered on this type adapter.
|
||||
*/
|
||||
fun registerSubtype(type: Class<out T>?, label: String?): RuntimeTypeAdapterFactory<T> {
|
||||
if (type == null || label == null) {
|
||||
throw NullPointerException()
|
||||
}
|
||||
require(!(subtypeToLabel.containsKey(type) || labelToSubtype.containsKey(label))) {
|
||||
"types and labels must be unique"
|
||||
}
|
||||
|
||||
labelToSubtype[label] = type
|
||||
subtypeToLabel[type] = label
|
||||
return this
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers `type` identified by its [simple][Class.getSimpleName]. Labels are case sensitive.
|
||||
*
|
||||
* @throws IllegalArgumentException if either `type` or its simple name
|
||||
* have already been registered on this type adapter.
|
||||
*/
|
||||
fun registerSubtype(type: Class<out T>): RuntimeTypeAdapterFactory<T> {
|
||||
return registerSubtype(type, type.simpleName)
|
||||
}
|
||||
|
||||
override fun <R : Any> create(gson: Gson, type: TypeToken<R>): TypeAdapter<R>? {
|
||||
if (type.rawType != baseType) {
|
||||
return null
|
||||
}
|
||||
|
||||
val labelToDelegate = mutableMapOf<String, TypeAdapter<*>>()
|
||||
val subtypeToDelegate = mutableMapOf<Class<*>, TypeAdapter<*>>()
|
||||
for ((key, value) in labelToSubtype) {
|
||||
val delegate = gson.getDelegateAdapter(
|
||||
this, TypeToken.get(
|
||||
value
|
||||
)
|
||||
)
|
||||
labelToDelegate[key] = delegate
|
||||
subtypeToDelegate[value] = delegate
|
||||
}
|
||||
|
||||
return object : TypeAdapter<R>() {
|
||||
@Throws(IOException::class)
|
||||
override fun read(reader: JsonReader): R? {
|
||||
val jsonElement = Streams.parse(reader)
|
||||
val labelJsonElement = if (maintainType) {
|
||||
jsonElement.asJsonObject[typeFieldName]
|
||||
} else {
|
||||
jsonElement.asJsonObject.remove(typeFieldName)
|
||||
}
|
||||
|
||||
if (labelJsonElement == null) {
|
||||
throw JsonParseException(
|
||||
"cannot deserialize $baseType because it does not define a field named $typeFieldName"
|
||||
)
|
||||
}
|
||||
val label = labelJsonElement.asString
|
||||
val delegate = labelToDelegate[label] as TypeAdapter<R>?
|
||||
if (delegate == null) {
|
||||
Timber.tag("RuntimeTypeAdapter").e(
|
||||
"cannot deserialize $baseType subtype named $label; did you forget to register a subtype? $jsonElement"
|
||||
)
|
||||
return null
|
||||
}
|
||||
return delegate.fromJsonTree(jsonElement)
|
||||
}
|
||||
|
||||
@Throws(IOException::class)
|
||||
override fun write(out: JsonWriter, value: R) {
|
||||
val srcType: Class<*> = value::class.java.javaClass
|
||||
val delegate =
|
||||
subtypeToDelegate[srcType] as TypeAdapter<R?>? ?: throw JsonParseException(
|
||||
"cannot serialize ${srcType.name}; did you forget to register a subtype?"
|
||||
)
|
||||
|
||||
val jsonObject = delegate.toJsonTree(value).asJsonObject
|
||||
if (maintainType) {
|
||||
Streams.write(jsonObject, out)
|
||||
return
|
||||
}
|
||||
|
||||
if (jsonObject.has(typeFieldName)) {
|
||||
throw JsonParseException(
|
||||
"cannot serialize ${srcType.name} because it already defines a field named $typeFieldName"
|
||||
)
|
||||
}
|
||||
val clone = JsonObject()
|
||||
val label = subtypeToLabel[srcType]
|
||||
clone.add(typeFieldName, JsonPrimitive(label))
|
||||
for ((key, value1) in jsonObject.entrySet()) {
|
||||
clone.add(key, value1)
|
||||
}
|
||||
Streams.write(clone, out)
|
||||
}
|
||||
}.nullSafe()
|
||||
}
|
||||
|
||||
companion object {
|
||||
/**
|
||||
* Creates a new runtime type adapter using for `baseType` using `typeFieldName` as the type field name. Type field names are case sensitive.
|
||||
* `maintainType` flag decide if the type will be stored in pojo or not.
|
||||
*/
|
||||
fun <T> of(
|
||||
baseType: Class<T>,
|
||||
typeFieldName: String,
|
||||
maintainType: Boolean
|
||||
): RuntimeTypeAdapterFactory<T> =
|
||||
RuntimeTypeAdapterFactory(baseType, typeFieldName, maintainType)
|
||||
|
||||
/**
|
||||
* Creates a new runtime type adapter using for `baseType` using `typeFieldName` as the type field name. Type field names are case sensitive.
|
||||
*/
|
||||
fun <T> of(baseType: Class<T>, typeFieldName: String): RuntimeTypeAdapterFactory<T> =
|
||||
RuntimeTypeAdapterFactory(baseType, typeFieldName, false)
|
||||
|
||||
/**
|
||||
* Creates a new runtime type adapter for `baseType` using `"type"` as
|
||||
* the type field name.
|
||||
*/
|
||||
fun <T> of(baseType: Class<T>): RuntimeTypeAdapterFactory<T> =
|
||||
RuntimeTypeAdapterFactory(baseType, "type", false)
|
||||
}
|
||||
}
|
||||
|
|
@ -1,22 +0,0 @@
|
|||
package fr.free.nrw.commons.wikidata.json;
|
||||
|
||||
import android.net.Uri;
|
||||
|
||||
import com.google.gson.TypeAdapter;
|
||||
import com.google.gson.stream.JsonReader;
|
||||
import com.google.gson.stream.JsonWriter;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
public class UriTypeAdapter extends TypeAdapter<Uri> {
|
||||
@Override
|
||||
public void write(JsonWriter out, Uri value) throws IOException {
|
||||
out.value(value.toString());
|
||||
}
|
||||
|
||||
@Override
|
||||
public Uri read(JsonReader in) throws IOException {
|
||||
String url = in.nextString();
|
||||
return Uri.parse(url);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
package fr.free.nrw.commons.wikidata.json
|
||||
|
||||
import android.net.Uri
|
||||
import com.google.gson.TypeAdapter
|
||||
import com.google.gson.stream.JsonReader
|
||||
import com.google.gson.stream.JsonWriter
|
||||
import java.io.IOException
|
||||
|
||||
class UriTypeAdapter : TypeAdapter<Uri>() {
|
||||
@Throws(IOException::class)
|
||||
override fun write(out: JsonWriter, value: Uri) {
|
||||
out.value(value.toString())
|
||||
}
|
||||
|
||||
@Throws(IOException::class)
|
||||
override fun read(reader: JsonReader): Uri {
|
||||
return Uri.parse(reader.nextString())
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue