使用SINGLE_TABLE继承策略运行条件时,“IllegalArgumentException发生了调用getter的事件” - java

尝试从带有简单限制条件的休眠条件的数据库列表中列出对象时出现此错误

Criteria criteria = session.createCriteria(Licence.class);
criteria.add(Restrictions.eq("gym", gym.getId()));
List<Licence> list = criteria.list();

我有两个类:LicenceGym有关联。这两个类正在扩展DataModel,该@Inheritance(strategy = InheritanceType.SINGLE_TABLE)用于管理有关数据版本的信息-(创建和设置,创建者和创建者以及创建者和创建时间)。这两个类具有ojit_code也是重要的。

执照

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
public class Licence extends DataModel implements Serializable {

    private Gym gym;
    private String licenceType;
    private String keyCode;
    private Date expireDate;
    private ELicenceExpiry expired;

    public Licence() {
    }

    @ManyToOne
    @JoinColumn(name="gym_id")
    public Gym getGym() {
        return gym;
    }

    public void setGym(Gym gym) {
        this.gym = gym;
    }

    @Column(name = "licence_type")
    public String getLicenceType() {
        return licenceType;
    }

    public void setLicenceType(String licenceType) {
        this.licenceType = licenceType;
    }

    @Column(name = "key_code")
    public String getKeyCode() {
        return keyCode;
    }

    public void setKeyCode(String keyCode) {
        this.keyCode = keyCode;
    }

    @Column(name = "expire_date")
    public Date getExpireDate() {
        return expireDate;
    }

    public void setExpireDate(Date expireDate) {
        this.expireDate = expireDate;
    }

    @Column(name = "expired")
    @Enumerated(EnumType.ORDINAL)
    public ELicenceExpiry getExpired() {
        return expired;
    }
    public void setExpired(ELicenceExpiry expired) {
        this.expired = expired;
    }
}

健身房

@Entity
@Inheritance(strategy= InheritanceType.SINGLE_TABLE)
public class Gym extends DataModel implements Serializable{

    private String shortName;
    private String name;
    private String nip; 
    private String street;
    private String postCode;
    private String localization;
    private String telephone;

    public Gym(){};

    @Column(name="short_name")
    public String getShortName() {
        return shortName;
    }
    public void setShortName(String shortName) {
        this.shortName = shortName;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getNip() {
        return nip;
    }
    public void setNip(String nip) {
        this.nip = nip;
    }
    public String getStreet() {
        return street;
    }
    public void setStreet(String street) {
        this.street = street;
    }
    @Column(name="post_code")
    public String getPostCode() {
        return postCode;
    }
    public void setPostCode(String postCode) {
        this.postCode = postCode;
    }
    public String getLocalization() {
        return localization;
    }
    public void setLocalization(String localization) {
        this.localization = localization;
    }
    public String getTelephone() {
        return telephone;
    }
    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }
}

数据模型

@MappedSuperclass
public abstract class DataModel implements Serializable{
    protected Long id;
    protected String editor;
    protected Date editDate;
    protected Time editTime;
    protected int dataState;

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getEditor() {
        return editor;
    }
    public void setEditor(String editor) {
        this.editor = editor;
    }
    @Column(name="edit_date")
    public Date getEditDate() {
        return editDate;
    }
    public void setEditDate(Date editDate) {
         this.editDate = editDate;
    }
    @Column(name="edit_time")
    public Time getEditTime() {
        return editTime;
    }
    public void setEditTime(Time editTime) {
        this.editTime = editTime;
    }
    @Column(name="data_state")
    public int getDataState() {
         return dataState;
    }
    public void setDataState(int dataState) {
        this.dataState = dataState;
    }
 }

的MySQL

CREATE TABLE licence(
    id INT(5) NOT NULL AUTO_INCREMENT,
    gym_id int(3),
    licence_type VARCHAR(10),
    key_code VARCHAR(10),
    expire_date DATE,
    expired INT(1),
    editor VARCHAR(10),
    edit_date DATE,
    edit_time TIME,
    data_state INT(1) NOT NULL,
    PRIMARY KEY (id),
    FOREIGN KEY (gym_id) REFERENCES gym(id) ON DELETE SET NULL
);

CREATE TABLE gym(
    id INT(3) NOT NULL AUTO_INCREMENT,
    short_name VARCHAR(16) NOT NULL UNIQUE,
    name VARCHAR(100) NOT NULL,
    street VARCHAR(100),
    post_code VARCHAR(6),
    localization VARCHAR(64),
    nip VARCHAR(13),
    telephone VARCHAR(15),
    editor VARCHAR(10),
    edit_date DATE,
    edit_time TIME,
    data_state INT(1) NOT NULL,
    PRIMARY KEY (id)
);

例外:

org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of pl.fitpartner.model.DataModel.id
    at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:192)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:346)
    at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4746)
    at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:4465)
(...)
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@37bd68c3
    at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:169)
    ... 28 more

我做错了什么?

参考方案

尝试使用

criteria.add(Restrictions.eq("gym", gym));

也就是说,您将gym代替criteria.add作为gym.getId()的第二个参数。

Java:找到特定字符并获取子字符串 - java

我有一个字符串4.9.14_05_29_16_21,我只需要获取4.9。数字各不相同,所以我不能简单地获得此char数组的前三个元素。我必须找到最正确的.并将其子字符串化直到那里。我来自Python,因此我将展示Python的实现方法。def foobar(some_string): location = some_string.rfind('.&…

Java string.hashcode()提供不同的值 - java

我已经在这个问题上停留了几个小时。我已经注释掉所有代码,认为这与数组超出范围有关,但是这种情况仍在发生。我正在尝试使用扫描仪从文件中读取输入,存储数据并稍后使用哈希码获取该数据。但是哈希值不断变化。public static void main(String[] args) { //only prior code is to access data char…

对象比较是否相等:JAVA - java

public ClassA { private String firstId; private String secondId; public void setFirstId(String firstId) { this.firstId = firstId; } public String getFirstId() { return id; } public…

在Java中使用新关键字和直接赋值的字符串 - java

String s="hi"; String s1=new String("hi"); 从内存角度看,s和s1存储在哪里?无论是在堆内存还是堆栈中。s指向“ hi”,而s1指向hi存在的内存位置?请帮忙? 参考方案 考虑以下 String s = "hi"; String s1 = new Strin…

Java-搜索字符串数组中的字符串 - java

在Java中,我们是否有任何方法可以发现特定字符串是字符串数组的一部分。我可以避免出现一个循环。例如String [] array = {"AA","BB","CC" }; string x = "BB" 我想要一个if (some condition to tell wheth…