/* * Copyright (C) 2017 Jake Wharton * * 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 com.jakewharton.moshi.rs; import com.squareup.moshi.JsonAdapter; import com.squareup.moshi.Moshi; import java.io.IOException; import java.lang.annotation.Annotation; import java.lang.reflect.Type; import javax.ws.rs.ext.ParamConverter; import javax.ws.rs.ext.ParamConverterProvider; /** * A {@link ParamConverterProvider} which uses Moshi to deserialize JSON to the declared parameter * type. The parameter must be annotated with {@link Json} for the converter to apply. */ public final class MoshiParamConverterFactory implements ParamConverterProvider { private final Moshi moshi; public MoshiParamConverterFactory(Moshi moshi) { this.moshi = moshi; } @Override public <T> ParamConverter<T> getConverter(Class<T> rawType, Type genericType, Annotation[] annotations) { for (Annotation annotation : annotations) { if (annotation instanceof Json) { JsonAdapter<T> adapter = moshi.adapter(genericType); return new MoshiParamConverter<>(adapter); } } return null; } private static final class MoshiParamConverter<T> implements ParamConverter<T> { private final JsonAdapter<T> adapter; MoshiParamConverter(JsonAdapter<T> adapter) { this.adapter = adapter; } @Override public T fromString(String value) { try { return adapter.fromJson(value); } catch (IOException e) { throw new IllegalArgumentException(e); } } @Override public String toString(T value) { return adapter.toJson(value); } } }