ImageSerializer.java

package com.github.kzwang.osem.serializer;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

public class ImageSerializer extends JsonSerializer<String> {
    @Override
    public void serialize(String value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
        if (value == null) {
            jgen.writeString("NULLSTR");
        } else {
            jgen.writeString(value.toUpperCase().replaceAll("A", ""));
        }

    }
}