json - json逆シリアル化-StackOverflowException

Question

カスタムオブジェクトを含むAbstractListの実装であるjson入力を解析しようとしています。ただし、何らかの理由で、CustomerDealerRecordのデシリアライザーにヒットすると、最初のノードを通過することはなく、StackOverflowExceptionがスローされます。私はこれで4時間ほどドキドキしてきました、そして私は無駄に多くの異なったグーグル検索をしました。だから、私の最後の溝の努力はここに来ています。あなた方全員がこれに当てることができるどんな光でも大いに感謝されるでしょう。ありがとうございました。コードは以下のとおりです。

public class PhoneDeserializer extends StdDeserializer<Phone>{

public PhoneDeserializer() {
    super(Phone.class);
}

@SuppressWarnings("unchecked")
@Override
public Phone deserialize(JsonParser jp,
        DeserializationContext ctx) throws IOException,
        JsonProcessingException {
    ObjectMapper mapper = (ObjectMapper) jp.getCodec();
    return  mapper.readValue(jp, Phone.class);
}

}

-

public class CustomerDealerRecordDeserializer extends StdDeserializer<CustomerDealerRecord>{

public CustomerDealerRecordDeserializer() {
    super(CustomerDealerRecord.class);
}
@SuppressWarnings("unchecked")
@Override
public CustomerDealerRecord deserialize(JsonParser jp,
        DeserializationContext ctx) throws IOException,
        JsonProcessingException {
    ObjectMapper mapper = (ObjectMapper) jp.getCodec();
    return mapper.readValue(jp, CustomerDealerRecord.class);
}

}

-これはカスタムリストです

public class CustomerDealerRecordList extends AbstractList<CustomerDealerRecord> {
private List<CustomerDealerRecord> records = new ArrayList<CustomerDealerRecord>();
@Override
public CustomerDealerRecord get(int index) {
    // TODO Auto-generated method stub
    return records.get(index);
}

@Override
public int size() {
    // TODO Auto-generated method stub
    return records.size();
}

public boolean add(CustomerDealerRecord cdr){
    return records.add(cdr);
}

}

-これはControllerメソッドです

@SuppressWarnings("unchecked")
public String getCustomerDealerReportAsExcel(HttpServletRequest req, HttpServletResponse resp){
    VelocityContext vc = new VelocityContext();
    vc.put("response", resp);

    // Jackson stuff
    CustomerDealerRecordDeserializer deser = new CustomerDealerRecordDeserializer();
    PhoneDeserializer phoneDeser = new PhoneDeserializer();

    // We have to create a module for the alias'ed class
    SimpleModule cdrModule = new SimpleModule("CustomerDealerRecord", new Version(1,0,0,null));
    SimpleModule phoneModule = new SimpleModule("Phone", new Version(1,0,0,null));

    // Add the deserializer to the module
    cdrModule.addDeserializer(CustomerDealerRecord.class, deser);
    phoneModule.addDeserializer(Phone.class, phoneDeser);

    // Now, create our mapper and then register the module to it.
    ObjectMapper mapper = new ObjectMapper();
    mapper.registerModule(cdrModule);
    mapper.registerModule(phoneModule);

    CustomerDealerRecordList list = null;

    try {
        JsonParser jp = mapper.getJsonFactory().createJsonParser(req.getParameter("json"));
        list = mapper.readValue(jp, CustomerDealerRecordList.class);
    } catch (JsonParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (JsonMappingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return format(req, vc, "reports/customer_dealer_report_excel");
}

-これはPhoneModelオブジェクトです

public class Phone {

    public Phone(String areaCode, String phone){
        this.areaCode = areaCode;
        this.phoneNumber = phone;
    }
    private String areaCode;
    private String phoneNumber;
    public String getAreaCode() {
        return areaCode;
    }
    public void setAreaCode(String areaCode) {
        this.areaCode = areaCode;
    }
    public String getPhoneNumber() {
        return phoneNumber;
    }
    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
}

-これはCustomerDealerRecordモデルオブジェクトです

public class CustomerDealerRecord {
    private String fleetName;
    private String fleetNumber;
    private String dealerName;
    private String dealerNumber;
    private String territoryName;
    private String territoryNumber;
    private String city;
    private String state;
    private Date downTime;
    private String failureDescription;
    private String tireManufacturer;
    private String tireSize;
    private String tireType;
    private String tirePosition;
    private String category;
    private String callerName;
    private Phone callerPhone;
    private String caseNumber;
    private Date caseCloseDate;
    private String poNumber;
    private String truckNumber;
    private String trailerNumber;
    private String tractorNumber;
    private String serviceDetailStatus;
    private String refusalReason;

    public String getFleetName() {
        return fleetName;
    }

    public void setFleetName(String fleetName) {
        this.fleetName = fleetName;
    }

    public String getFleetNumber() {
        return fleetNumber;
    }

    public void setFleetNumber(String fleetNumber) {
        this.fleetNumber = fleetNumber;
    }

    public String getDealerName() {
        return dealerName;
    }

    public void setDealerName(String dealerName) {
        this.dealerName = dealerName;
    }

    public String getDealerNumber() {
        return dealerNumber;
    }

    public void setDealerNumber(String dealerNumber) {
        this.dealerNumber = dealerNumber;
    }

    public String getTerritoryName() {
        return territoryName;
    }

    public void setTerritoryName(String territoryName) {
        this.territoryName = territoryName;
    }

    public String getTerritoryNumber() {
        return territoryNumber;
    }

    public void setTerritoryNumber(String territoryNumber) {
        this.territoryNumber = territoryNumber;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public Date getDownTime() {
        return downTime;
    }

    public void setDownTime(Date downTime) {
        this.downTime = downTime;
    }

    public String getFailureDescription() {
        return failureDescription;
    }

    public void setFailureDescription(String failureDescription) {
        this.failureDescription = failureDescription;
    }

    public String getTireManufacturer() {
        return tireManufacturer;
    }

    public void setTireManufacturer(String tireManufacturer) {
        this.tireManufacturer = tireManufacturer;
    }

    public String getTireSize() {
        return tireSize;
    }

    public void setTireSize(String tireSize) {
        this.tireSize = tireSize;
    }

    public String getTireType() {
        return tireType;
    }

    public void setTireType(String tireType) {
        this.tireType = tireType;
    }

    public String getTirePosition() {
        return tirePosition;
    }

    public void setTirePosition(String tirePosition) {
        this.tirePosition = tirePosition;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getCallerName() {
        return callerName;
    }

    public void setCallerName(String callerName) {
        this.callerName = callerName;
    }

    public Phone getCallerPhone() {
        return callerPhone;
    }

    public void setCallerPhone(Phone callerPhone) {
        this.callerPhone = callerPhone;
    }

    public String getCaseNumber() {
        return caseNumber;
    }

    public void setCaseNumber(String caseNumber) {
        this.caseNumber = caseNumber;
    }

    public Date getCaseCloseDate() {
        return caseCloseDate;
    }

    public void setCaseCloseDate(Date caseCloseDate) {
        this.caseCloseDate = caseCloseDate;
    }

    public String getPoNumber() {
        return poNumber;
    }

    public void setPoNumber(String poNumber) {
        this.poNumber = poNumber;
    }

    public String getTruckNumber() {
        return truckNumber;
    }

    public void setTruckNumber(String truckNumber) {
        this.truckNumber = truckNumber;
    }

    public String getTrailerNumber() {
        return trailerNumber;
    }

    public void setTrailerNumber(String trailerNumber) {
        this.trailerNumber = trailerNumber;
    }

    public String getTractorNumber() {
        return tractorNumber;
    }

    public void setTractorNumber(String tractorNumber) {
        this.tractorNumber = tractorNumber;
    }

    public String getServiceDetailStatus() {
        return serviceDetailStatus;
    }

    public void setServiceDetailStatus(String serviceDetailStatus) {
        this.serviceDetailStatus = serviceDetailStatus;
    }

    public String getRefusalReason() {
        return refusalReason;
    }

    public void setRefusalReason(String refusalReason) {
        this.refusalReason = refusalReason;
    }

}

-サンプルJSON

[
{
"fleetName":"sycamore specialzed carriers",
"fleetNumber":"CF00002760",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":null,
"state":null,
"downTime":"3000-01-01",
"failureDescription":null,
"tireManufacturer":"Continental Tire",
"tireSize":"10.00R15",
"tireType":"DRIVE",
"tirePosition":"LFO",
"category":"Dealer Location Information",
"callerName":"ANN RENNER",
"callerPhone":{
"areaCode":null,
"phoneNumber":null
},
"caseNumber":"189354",
"caseCloseDate":null,
"poNumber":null,
"truckNumber":null,
"trailerNumber":null,
"tractorNumber":null,
"serviceDetailStatus":"CAN",
"refusalReason":"Response time"
},
{
"fleetName":"sycamore specialzed carriers",
"fleetNumber":"CF00002760",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":null,
"state":null,
"downTime":"3000-01-01",
"failureDescription":null,
"tireManufacturer":null,
"tireSize":null,
"tireType":null,
"tirePosition":null,
"category":"Dealer Location Information",
"callerName":"ANN RENNER",
"callerPhone":{
"areaCode":null,
"phoneNumber":null
},
"caseNumber":"189354",
"caseCloseDate":null,
"poNumber":null,
"truckNumber":null,
"trailerNumber":null,
"tractorNumber":null,
"serviceDetailStatus":"ACT",
"refusalReason":null
},
{
"fleetName":"sycamore specialzed carriers",
"fleetNumber":"CF00002760",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":null,
"state":null,
"downTime":"3000-01-01",
"failureDescription":null,
"tireManufacturer":"Continental Tire",
"tireSize":"295/75R22.5",
"tireType":"BIAS",
"tirePosition":"LMI",
"category":"Service Call",
"callerName":" ",
"callerPhone":{
"areaCode":null,
"phoneNumber":null
},
"caseNumber":"189240",
"caseCloseDate":null,
"poNumber":null,
"truckNumber":null,
"trailerNumber":null,
"tractorNumber":null,
"serviceDetailStatus":"CAN",
"refusalReason":"Other"
},
{
"fleetName":"sycamore specialzed carriers",
"fleetNumber":"CF00002760",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":null,
"state":null,
"downTime":"3000-01-01",
"failureDescription":null,
"tireManufacturer":"Continental Tire",
"tireSize":"295/75R22.5",
"tireType":"DRIVE",
"tirePosition":"LMI",
"category":"Service Call",
"callerName":" ",
"callerPhone":{
"areaCode":null,
"phoneNumber":null
},
"caseNumber":"189240",
"caseCloseDate":null,
"poNumber":null,
"truckNumber":null,
"trailerNumber":null,
"tractorNumber":null,
"serviceDetailStatus":"ACT",
"refusalReason":null
},
{
"fleetName":"TEST CUSTOMER",
"fleetNumber":"123ee22a",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":null,
"state":null,
"downTime":"3000-01-01",
"failureDescription":null,
"tireManufacturer":null,
"tireSize":null,
"tireType":null,
"tirePosition":null,
"category":"Service Call",
"callerName":"JASON MA",
"callerPhone":{
"areaCode":"123",
"phoneNumber":"222"
},
"caseNumber":"189328",
"caseCloseDate":"2012-01-03",
"poNumber":null,
"truckNumber":null,
"trailerNumber":null,
"tractorNumber":null,
"serviceDetailStatus":"ACT",
"refusalReason":"Other"
},
{
"fleetName":"TEST CUSTOMER",
"fleetNumber":"123ee22a",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":"ST LOUIS",
"state":"MO",
"downTime":"3000-01-01",
"failureDescription":"REPAIR IF POSSIBLE",
"tireManufacturer":"Continental Tire",
"tireSize":"11R22.5",
"tireType":"RADIAL",
"tirePosition":"LRI",
"category":"Service Call",
"callerName":"BJ TEST",
"callerPhone":{
"areaCode":"314",
"phoneNumber":"592-3129"
},
"caseNumber":"189341",
"caseCloseDate":"2012-06-19",
"poNumber":null,
"truckNumber":null,
"trailerNumber":"34",
"tractorNumber":"12",
"serviceDetailStatus":"CAN",
"refusalReason":"Product not available"
},
{
"fleetName":"TEST CUSTOMER",
"fleetNumber":"123ee22a",
"dealerName":null,
"dealerNumber":null,
"territoryName":null,
"territoryNumber":null,
"city":"ST LOUIS",
"state":"MO",
"downTime":"3000-01-01",
"failureDescription":"REPAIR IF POSSIBLE",
"tireManufacturer":"Continental Tire",
"tireSize":"11R22.5",
"tireType":"RADIAL",
"tirePosition":"LRI",
"category":"Service Call",
"callerName":"BJ TEST",
"callerPhone":{
"areaCode":"314",
"phoneNumber":"592-3129"
},
"caseNumber":"189341",
"caseCloseDate":"2012-06-19",
"poNumber":null,
"truckNumber":null,
"trailerNumber":"34",
"tractorNumber":"12",
"serviceDetailStatus":"ACT",
"refusalReason":null
}
]

score 1 · Accepted Answer

@bmarguliesがコメントしたように、PhoneDeserializerは（間接的に）PhoneDeserializerを呼び出します。この行mapper.readValue(jp, Phone.class);により、JacksonはPhoneクラスのデシリアライザーを解決できます。これはたまたまPhoneDeserializerです。Phonedeserializerクラスはまったく必要ありません。Jacksonが電話クラスを適切に処理します。

score 0 · Accepted Answer

ええ、最初はデシリアライザーを使用していませんでした.@ pgelinasが言ったように、それは必要ありませんでした. あれこれいじってたどり着いたところです。うまくいきませんでした。根本的な問題は、mapper.convertValue の使用に戻り、Phone クラスに public no arg コンストラクターを与える必要があったことです。基本的に、私は馬鹿で、単純なことを分析しすぎていました。

json - json逆シリアル化-StackOverflowException

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