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GsonFactory.java
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42 lines (38 loc) · 1.49 KB
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/**
* Copyright 2012-2019 The Feign Authors
*
* 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.
*/
package feign.gson;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.TypeAdapter;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.Map;
import static feign.Util.resolveLastTypeParameter;
final class GsonFactory {
private GsonFactory() {}
/**
* Registers type adapters by implicit type. Adds one to read numbers in a {@code Map<String,
* Object>} as Integers.
*/
static Gson create(Iterable<TypeAdapter<?>> adapters) {
GsonBuilder builder = new GsonBuilder().setPrettyPrinting();
builder.registerTypeAdapter(new TypeToken<Map<String, Object>>() {}.getType(),
new DoubleToIntMapTypeAdapter());
for (TypeAdapter<?> adapter : adapters) {
Type type = resolveLastTypeParameter(adapter.getClass(), TypeAdapter.class);
builder.registerTypeAdapter(type, adapter);
}
return builder.create();
}
}