Retrofit - 动态设置名称的多个同名查询参数 [英] Retrofit — Multiple query parameters of same name where name is set dynamically
问题描述
我正在尝试将旧项目迁移到 Retrofit 库,而该项目的 API 非常棘手.所以我有一个这样的查询模板:
I'm trying to migrate an old project to Retrofit library and this project has quite tricky API. So I have a query template like this:
@GET(value = "products/search")
Single<ProductSearchResponse> productSearch();
我必须在以下模板中添加一些参数:
And I have to add some parameters here of following template:
filter[attributeId]=attributeValueId
例如:
products/search?filter[1]=10&filter[1]=11&filter[2]=20&filter[2]=21
API 就是这样工作的,我无法更改它.我知道我们可以将列表作为参数传递,如下所示:
That's how API works and I can't change it. I know that we can pass a list as a parameter, like this:
@Query("filter") List<Integer> attributeValueIds
但是我怎样才能动态设置参数的名称呢?
But how can I also set parameter's name dynamically?
推荐答案
感谢@ILLIA DEREVIANKO 发布的链接 (https://github.com/square/retrofit/issues/1324),我已经设法解决了这个类的问题:
Thanks to the link, posted by @ILLIA DEREVIANKO (https://github.com/square/retrofit/issues/1324), I've managed to solve the problem with this class:
public class ProxyRetrofitQueryMap extends HashMap<String, Object> {
public ProxyRetrofitQueryMap(Map<String, Object> m) {
super(m);
}
@Override
public Set<Entry<String, Object>> entrySet() {
Set<Entry<String, Object>> originSet = super.entrySet();
Set<Entry<String, Object>> newSet = new HashSet<>();
for (Entry<String, Object> entry : originSet) {
String entryKey = entry.getKey();
if (entryKey == null) {
throw new IllegalArgumentException("Query map contained null key.");
}
Object entryValue = entry.getValue();
if (entryValue == null) {
throw new IllegalArgumentException(
"Query map contained null value for key '" + entryKey + "'.");
}
else if(entryValue instanceof List) {
for(Object arrayValue:(List)entryValue) {
if (arrayValue != null) { // Skip null values
Entry<String, Object> newEntry = new AbstractMap.SimpleEntry<>(entryKey, arrayValue);
newSet.add(newEntry);
}
}
}
else {
Entry<String, Object> newEntry = new AbstractMap.SimpleEntry<>(entryKey, entryValue);
newSet.add(newEntry);
}
}
return newSet;
}
}
有了这个,我们可以只使用一个映射,其中键是唯一的参数名称,值是一个字符串列表,即该参数的值.像这样:
With this we can just use a map, where key is a unique parameter name and value is a List of Strings, that are values for this parameter. Something like this:
ProxyRetrofitQueryMap map = new ProxyRetrofitQueryMap();
List<String> values1 = new ArrayList<>();
values1.add("10");
values1.add("11");
map.put("filter[1]", values1);
List<String> values2 = new ArrayList<>();
values1.add("20");
values1.add("21");
map.put("filter[2]", values2);
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