Neo4j: custom parse string to POJO with jackson json

In my project, I provide neo4j extentions to clients which send json string to extention while  jackson auto parse the json string to my POJO Model.    Howerver, I want to simply the json string sent by client . 

The POJO Model class likes

@NodeEntity
@XmlRootElement
@JsonAutoDetect
@JsonIgnoreProperties(ignoreUnknown = true)
public class Task {
    @GraphId
    private Long nodeId;
    @Indexed(unique = true)
    private String taskId;

    @Indexed(indexType = IndexType.FULLTEXT, indexName = "TaskTile")
    private String title;
    @Indexed(indexType = IndexType.FULLTEXT, indexName = "TaskDescription")
    private String description;

    // Date startTime;
    // Date endTime;
    @Indexed
    private int startDate;
    @Indexed
    private int startTime;
    @Indexed
    private int endDate;
    @Indexed
    private int endTime;
---

 

The startDate, startTime,endDate,endTime adopted to search.  I dont' want client to explict send these fields in json strings but send by two Date string likes  yyyy-MM-dd HH:mm:ss   or Unix time 172399299999.

The valueble hints are

http://wiki.fasterxml.com/JacksonHowToCustomDeserializers

http://magicmonster.com/kb/prg/java/spring/webmvc/jackson_custom.html

 http://www.baeldung.com/jackson-deserialization

 

I did it by some post advices. But When I send some post,  Neo4j Jersey actually doesn't use jackson to parse the string.

I tried everything I could. Finally, I tried it out.

In pom.xml, We add

 		<dependency>
			<groupId>com.fasterxml.jackson.jaxrs</groupId>
			<artifactId>jackson-jaxrs-json-provider</artifactId>
			<version>2.2.1</version>
		</dependency>

 

In Model , We delete

@XmlRootElement

and Change Json related annotations to

com.fasterxml.jackson.databind.annotation.*

 not

org.codehaus.jackson.annotate.*

And The final Modle class is

import org.springframework.data.neo4j.annotation.GraphId;
import org.springframework.data.neo4j.annotation.Indexed;
import org.springframework.data.neo4j.annotation.Labels;
import org.springframework.data.neo4j.annotation.NodeEntity;
import org.springframework.data.neo4j.support.index.IndexType;

import com.fadeinfadeout.common.TaskDeserializer;
import com.fadeinfadeout.common.TaskPayOption;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

@NodeEntity
@JsonDeserialize(using = TaskDeserializer.class )
public class Task {
    @GraphId
    private Long nodeId;
    @Indexed(unique = true)
    private String taskId;

 

The TaskDeserializer class is

package com.fadeinfadeout.common;

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Logger;

import com.fadeinfadeout.modle.Task;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.TextNode;

public class TaskDeserializer extends JsonDeserializer<Task> {
    private static DateFormat dateFormator = new SimpleDateFormat("yyyyMMdd");
    private static DateFormat timeFormator = new SimpleDateFormat("HHmmss");
    private static final Logger logger = Logger.getLogger(TaskDeserializer.class.getName());
    @Override
    public Task deserialize(JsonParser jp, DeserializationContext dc) throws IOException, JsonProcessingException {
	JsonNode node = jp.getCodec().readTree(jp);
	String taskId = ((TextNode) node.get("taskId")).textValue();
	String title = ((TextNode) node.get("title")).textValue();
	String description = ((TextNode) node.get("description")).textValue();

	String startTimeStr = ((TextNode) node.get("start")).textValue(); // unix time
	String endTimeStr = ((TextNode) node.get("end")).textValue();

	if (startTimeStr != null & endTimeStr != null) {
	    Date sdate = new Date(Long.valueOf(startTimeStr));
	    Date edate = new Date(Long.valueOf(endTimeStr));
	    int startDate = Integer.valueOf(dateFormator.format(sdate));
	    int startTime = Integer.valueOf(timeFormator.format(sdate));

	    int endDate = Integer.valueOf(dateFormator.format(edate));
	    int endTime = Integer.valueOf(timeFormator.format(edate));
	    return new Task(taskId, title, description, startDate, startTime, endDate, endTime);
	}

	return new Task(taskId, title, description);
    }
  
}

 

When post a request with

curl -i -H 'content-type: application/json' -X POST 
-d '{"taskId":"3","title":"打炮","description":"约吗",
"start":"1427965098585","end":"1427965598585"}' 
http://localhost:7474/fifo/task/addTask

 

The deserilizer result is correct

 

 

 

Due to the following posts, I could solve this problem.

http://www.4byte.cn/question/601051/unmanaged-extensions-taking-json-as-parameter.html

https://github.com/FasterXML/jackson-annotations/wiki/Jackson-Annotations

 

 

 

 

 

 

------------------------------------

The other coin of the above problem is custom serialize POJO Model to Json string

http://java.dzone.com/articles/how-serialize-javautildate

http://wiki.fasterxml.com/JacksonSampleDateHandling

 

 

 

 

References

https://jersey.java.net/nonav/documentation/latest/media.html

http://wiki.fasterxml.com/JacksonHowToCustomSerializers

http://magicmonster.com/kb/prg/java/spring/webmvc/jackson_custom.html

http://wiki.fasterxml.com/JacksonHome

http://wiki.fasterxml.com/JacksonSampleSimplePojoMapper