我有一个如下的json:
{
"transformationRules": [
{
"targetFieldName": "pageUrlNumber",
"inputPath": "$.metadata.pageUrl",
"rules": [
{
"name": "regex",
"regexPattern": "\\d+",
"regexTransformType": "extract",
"order":2
}
]
},
{
"targetFieldName": "categories",
"inputPath": "$.attributes[0].productInfo.breadCrumbs",
"rules": [
{
"name": "transform"
}
]
}
]
}
rules
数组包含不同类的JSON。
我想根据名称的值即regex, transform将上述JSON转换为它们的POJO。我尝试了以下代码。
Rule.java
@NoArgsConstructor
@Data
@JsonTypeInfo(
use = JsonTypeInfo.Id.NAME,
include = JsonTypeInfo.As.EXTERNAL_PROPERTY,
property = "name")
@JsonSubTypes({
@JsonSubTypes.Type(value = RegexRule.class, name = "regex"),
@JsonSubTypes.Type(value = Transform.class, name = "transform"),
})
public abstract class Rule {
@JsonProperty("name")
private String name;
@JsonProperty("order")
private int order = 1;
protected Rule(String name, int order) {
this.name = name;
this.order = order;
}
}
RegexRule.java
@NoArgsConstructor
@Data
public class RegexRule extends Rule{
@JsonProperty("regexPattern")
private String regexPattern;
@JsonProperty("regexTransformType")
private String regexTransformType;
@JsonProperty("replacementValue")
private String replacementValue = "";
@JsonProperty("regexGroupNumber")
private int regexGroupNumber = 0;
public RegexRule(String name, int order, String regexPattern, String regexTransformType, String replacementValue, int regexGroupNumber) {
super(name, order);
this.regexGroupNumber = regexGroupNumber;
this.regexPattern = regexPattern;
this.regexTransformType = regexTransformType;
this.replacementValue = replacementValue;
}
}
Transform.java
@NoArgsConstructor
@Data
public class Transform extends Rule{
public Transform(String name, int order) {
super(name, order);
}
}
Main.java
for(TransformationRule transformationRule: getTransformationRules()){
for(Rule rule:transformationRule.getRules()){
System.out.println(rule.getName());
}
}
输出:
null
null
在我的主函数中,当我将Json反序列化为pojos时,我得到的名称为null。相反,我应该得到
regex
和transform
作为输出。我在这里犯了什么错误?我需要名称用于工厂方法。