/* * 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.io.InputStream; import java.lang.annotation.Annotation; import java.lang.reflect.Type; import javax.ws.rs.WebApplicationException; import javax.ws.rs.core.MediaType; import javax.ws.rs.core.MultivaluedMap; import javax.ws.rs.core.NoContentException; import javax.ws.rs.ext.MessageBodyReader; import okio.BufferedSource; import okio.Okio; import static javax.ws.rs.core.MediaType.APPLICATION_JSON_TYPE; /** * A {@link MessageBodyReader} which uses Moshi to deserialize JSON to the declared body type. * Your endpoint must be annotated as consuming {@code application/json}. */ public final class MoshiMessageBodyReader implements MessageBodyReader<Object> { private final Moshi moshi; public MoshiMessageBodyReader(Moshi moshi) { this.moshi = moshi; } @Override public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) { return mediaType.isCompatible(APPLICATION_JSON_TYPE); } @Override public Object readFrom(Class<Object> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream) throws IOException, WebApplicationException { JsonAdapter<Object> adapter = moshi.adapter(genericType); BufferedSource source = Okio.buffer(Okio.source(entityStream)); if (!source.request(1)) { throw new NoContentException("Stream is empty"); } return adapter.fromJson(source); // Note: we do not close the InputStream per the interface documentation. } }