java-classic-code/serializer/JacksonSerializer.java

package com.sdyc.ndmp.protobuf.serializer;

import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;

import java.io.IOException;

/**
 * <pre>
 *
 * Created by IntelliJ IDEA.
 * User: zhenqin
 * Date: 14/11/14
 * Time: 13:08
 * To change this template use File | Settings | File Templates.
 *
 * </pre>
 *
 * @author zhenqin
 */
public class JacksonSerializer<T> implements Serializer<T> {

    private static final long serialVersionUID = 1L;

    /**
     * String byte
     */
    private StringSerializer serializer = new StringSerializer();


    /**
     * 类对象, 用于Object json to Object 的转换
     */
    private Class<? extends T> reverseClazz;


    private ObjectMapper objectMapper;



    public JacksonSerializer(String reverseClazz) {
        try {
            this.reverseClazz = (Class<T>) Class.forName(reverseClazz);
        } catch (ClassNotFoundException e) {
            throw new IllegalArgumentException(e);
        }

        objectMapper = new ObjectMapper();
        objectMapper.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false);
        objectMapper.configure(SerializationConfig.Feature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS, true);
    }



    public JacksonSerializer(Class<? extends T> clazz) {
        this.reverseClazz = clazz;
        objectMapper = new ObjectMapper();
        objectMapper.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false);
        objectMapper.configure(SerializationConfig.Feature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS, true);
    }


    @Override
    public byte[] serialize(T t) {
        try {
            String s = objectMapper.writeValueAsString(t);
            return serializer.serialize(s);
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
    }

    @Override
    public T deserialize(byte[] bytes) {
        try {
            return objectMapper.readValue(serializer.deserialize(bytes), reverseClazz);
        } catch (IOException e) {
            throw new IllegalArgumentException(e);
        }
    }


    public Class<? extends T> getReverseClazz() {
        return reverseClazz;
    }

    public ObjectMapper getObjectMapper() {
        return objectMapper;
    }

}