具有Retrofit转换器的Gson解串器:只需要内部JSON来处理所有响应 [英] Gson deserializer with Retrofit converter: just need inner JSON for all responses
问题描述
{
stuff_i_need:[
{
title:你好
},
{
title:世界!
$ status
$ b $
和
{
other_things_key:
{
版本:208
},
status:success
}
总是有两个元素,我只需要那个不是状态的元素。
我想用一个GsonBuilder来做这件事。
我试过了:
<$ p $新的GsonBuilder()
.registerTypeAdapter(List.class,new JsonDeserializer< List>(){
@Override
public List反序列化(JsonElement json ,类型typeOfT,
JsonDeserializationContext上下文)
throws JsonParseException {
final JsonObject jsonObject = json.getAsJsonObject();
for(Map.Entry< String,JsonElement> entry:jsonObject。 entrySet()){
final JsonElement element = entry.getValue();
if(element.isJsonArray()){
返回新的Gson()。fromJson(element.getAsJsonArray(),
New TypeToken< List>(){}。getType());
}
}
return null;
}
)
但我不认为在这样的情况下,它并不能满足更广泛的条件。
在Gowtham的帮助下,以下内容:
private static class ItemTypeAdapterFactory implements TypeAdapterFactory {
@Override
public< T> TypeAdapter< T> create(Gson gson,final TypeToken< T> type){
final TypeAdapter< T> delegate = gson.getDelegateAdapter(this,type);
final TypeAdapter< JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
返回新的TypeAdapter< T>(){
@Override
public void write(JsonWriter out,T value)抛出IOException {
delegate.write(out,值);
}
@Override
public T read(JsonReader in)throws IOException {
JsonElement jsonElement = elementAdapter.read(in);
if(jsonElement.isJsonObject()){
JsonObject jsonObject = jsonElement.getAsJsonObject();
if(jsonObject.entrySet()。size()== 2){
jsonObject.remove(status);
jsonElement = jsonObject.entrySet()。iterator()。next()。getValue();
}
}
return delegate.fromJsonTree(jsonElement);
}
} .nullSafe();
$ / code $ / pre
这是在RestAdapter.Builder上设置的: / b>
.setConverter(new GsonConverter(new GsonBuilder())
.registerTypeAdapterFactory(new ItemTypeAdapterFactory())
。 create()))
我真的只是删除了statusJsonObject。
I am working with an API that always responds like so:
{
"stuff_i_need": [
{
"title": "Hello"
},
{
"title": "World!"
}
],
"status": "success"
}
and
{
"other_things_key":
{
"version": "208"
},
"status": "success"
}
There are always two elements, and I just need the one that is not "status."
I want to do this with one GsonBuilder, as well.
I tried:
new GsonConverter(new GsonBuilder()
.registerTypeAdapter(List.class, new JsonDeserializer<List>() {
@Override
public List deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
final JsonObject jsonObject = json.getAsJsonObject();
for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet()) {
final JsonElement element = entry.getValue();
if (element.isJsonArray()) {
return new Gson().fromJson(element.getAsJsonArray(),
new TypeToken<List>(){}.getType());
}
}
return null;
}
)
but I don't think that is right, and it doens't satisfy the broader conditions.
解决方案 With some help from Gowtham, I ended up doing the following:
private static class ItemTypeAdapterFactory implements TypeAdapterFactory {
@Override
public <T> TypeAdapter<T> create(Gson gson, final TypeToken<T> type) {
final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
return new TypeAdapter<T>() {
@Override
public void write(JsonWriter out, T value) throws IOException {
delegate.write(out, value);
}
@Override
public T read(JsonReader in) throws IOException {
JsonElement jsonElement = elementAdapter.read(in);
if (jsonElement.isJsonObject()) {
JsonObject jsonObject = jsonElement.getAsJsonObject();
if (jsonObject.entrySet().size() == 2) {
jsonObject.remove("status");
jsonElement = jsonObject.entrySet().iterator().next().getValue();
}
}
return delegate.fromJsonTree(jsonElement);
}
}.nullSafe();
}
}
and this is set on the RestAdapter.Builder:
.setConverter(new GsonConverter(new GsonBuilder()
.registerTypeAdapterFactory(new ItemTypeAdapterFactory())
.create()))
I really just ended up removing the "status" JsonObject.
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