SimilarPlacesDeserializer.java

/*
 * Copyright 2013 Agorava
 *
 * 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 org.agorava.twitter.jackson;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.agorava.api.atinject.BeanResolver;
import org.agorava.twitter.model.Place;
import org.agorava.twitter.model.SimilarPlacesResponse;

import java.io.IOException;
import java.util.List;

class SimilarPlacesDeserializer extends JsonDeserializer<SimilarPlacesResponse> {
    @Override
    public SimilarPlacesResponse deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException,
            JsonProcessingException {
        ObjectMapper mapper = BeanResolver.getInstance().resolve(ObjectMapper.class);
        jp.setCodec(mapper);
        JsonNode node = jp.readValueAs(JsonNode.class);
        JsonNode resultNode = node.get("result");
        String token = resultNode.get("token").textValue();
        JsonNode placesNode = resultNode.get("places");
        @SuppressWarnings("unchecked")
        List<Place> places = (List<Place>) mapper.reader(new TypeReference<List<Place>>() {
        }).readValue(placesNode);
        return new SimilarPlacesResponse(places, token);
    }
}