Java Json to Object deserializeFromDataNode(JsonParser jp, DeserializationContext ctxt, String propertyName, TypeReference typeReference)

Description

deserialize From Data Node

License

Apache License

Declaration

public static <T> T deserializeFromDataNode(JsonParser jp, DeserializationContext ctxt, String propertyName,
            TypeReference<T> typeReference) throws IOException, JsonProcessingException 

Method Source Code

//package com.java2s;
/*//from  w ww . j  a v  a 2 s .c o m
 * 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.
 */

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;

public class Main {
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    public static <T> T deserializeFromDataNode(JsonParser jp, DeserializationContext ctxt, String propertyName,
            TypeReference<T> typeReference) throws IOException, JsonProcessingException {
        if (jp.hasCurrentToken() && jp.getCurrentToken().equals(JsonToken.START_OBJECT)) {
            JsonNode dataNode = jp.readValueAs(JsonNode.class);
            if (dataNode.has(propertyName)) {
                return OBJECT_MAPPER.reader(typeReference).<T>readValue(dataNode.get(propertyName));
            }
            return null;
        }
        throw ctxt.mappingException("Expected JSON object");
    }
}

Related

1. decodeCommandAsJson(final BsonInput bsonInput)
2. deserialize(JsonReader reader, Class type)
3. deserialize(String json, Class clazz)
4. deserialize(String json, Class targetType)
5. deserialize(String jsonData, Class typeOfT)
6. deserializeJson(String content, Class valueType)
7. json2List(String json, Class beanClass)
8. json2map(String jsonStr)
9. json2pojo(String jsonStr, Class clazz)