PropertyAccessException 访问持久属性的反射字段时出错。

huangapple
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英文:

PropertyAccessException Error accessing field by reflection for persistent property

问题

I have two entities WorkHolidayEntity and WorkHolidaySegmentEntity. I am using a composite key using EmbeddedId in these entity.

WorkHolidaySegmentEntity

// Code for WorkHolidaySegmentEntity
package com.example.demo.model;

import org.hibernate.annotations.Type;

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;

@Entity
@Table(name = "WORK_PROCESSED_SEGMENT")
@NamedQuery(name = "WorkHolidaySegmentEntity.findAll", query = "SELECT w FROM WorkHolidaySegmentEntity w")
public class WorkHolidaySegmentEntity extends Model {
    private static final long serialVersionUID = -5149257772387077483L;

    @EmbeddedId
    private GenericPrimaryKey id;

    @OneToOne(fetch= FetchType.EAGER)
    @JoinColumns({
        @JoinColumn(name="WORK_ITEM_ID", referencedColumnName="WORK_ITEM_ID", insertable = false, updatable = false)
    })
    private WorkHolidayEntity workHolidayEntity ;

    @Column(name="WORK_ITEM_ID")
    @NotNull
    private Long workItemId;

    @Column(name="PAYCODE_ID")
    private Long paycodeId;

    @Column(name="DURATION_IN_DAYS")
    private BigDecimal durationInDays;

    @Column(name="DURATION_IN_SECONDS")
    private Long durationInSeconds;

    @Column(name="START_DATE_TIME")
    @NotNull
    private LocalDateTime startDateTime;

    @Column(name="MONEY_AMOUNT")
    private BigDecimal moneyAmount;

    // ... other methods and properties
}

workHolidayEntity

// Code for WorkHolidayEntity
package com.example.demo.model;

import org.hibernate.annotations.Type;

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.time.LocalDate;

@Entity
@Table(name="WORK_HOLIDAY")
@NamedQuery(name="WorkHolidayEntity.findAll", query="SELECT e FROM WorkHolidayEntity e")
public class WorkHolidayEntity extends Model {
    private static final long serialVersionUID = -3259133892721228837L;

    @EmbeddedId
    private GenericPrimaryKey id;

    @Column(name="WORK_ITEM_ID")
    @NotNull
    private Long workItemId;

    @Column(name="HOLIDAY_ID")
    private Long holidayId ;

    @Column(name="LABOR_ACCOUNT_ID")
    private Long laborAccountId ;

    @Column(name="ORGJOB_ID")
    private Long orgJobId ;

    @Column(name="TIME_ENTITY_SEGMENT_TYPE_ID")
    private Long timeEntitySegmentTypeId ;

    @Column(name="APPLY_DATE")
    @NotNull
    private LocalDate applyDate ;

    // ... other methods and properties
}

Both of the Entity extends an abstract class Model

// Code for Model class
public abstract class Model implements Persistable, Serializable {
    public Model() {
    }

    // ... equals, hashCode, and other methods
}

The Embedabble class is

// Code for GenericPrimaryKey class
package com.example.demo.model;

import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import javax.validation.constraints.NotNull;

@Embeddable
public class GenericPrimaryKey implements Serializable {
    private static final long serialVersionUID = -666538159041179819L;
    
    @Column(name = "ID")
    @NotNull
    private Long id;

    public GenericPrimaryKey() {
    }

    public GenericPrimaryKey(Long id) {
        this.id = id;
    }

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public boolean equals(Object other) {
        if (this == other) {
            return true;
        } else if (!(other instanceof GenericPrimaryKey)) {
            return false;
        } else {
            GenericPrimaryKey castOther = (GenericPrimaryKey)other;
            return this.id.equals(castOther.id);
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int hash = 17;
        hash = hash * prime + this.id.intValue();
        return hash;
    }
}

RepositoryImpl class implementation:

// Code for RepositoryImpl class
public List<WorkHolidaySegmentEntity> findWorkHolidayByWorkItemIds(List<Long> workItemIdList) {
    if (workItemIdList == null || workItemIdList.isEmpty())
        return new ArrayList<>();
    
    Session session = entityManager.unwrap(Session.class);
    Query query = session.createQuery("select whs FROM WorkHolidaySegmentEntity whs " +
            "inner join fetch whs.workHolidayEntity wh " +
            "where whs.workItemId IN (:workItemIdList)");

    query.setParameterList("workItemIdList", workItemIdList);

    List<WorkHolidaySegmentEntity> workHolidays = query.list();
    return workHolidays;
}

The provided code seems to be a combination of Java code and HTML-like formatting. It's possible that the formatting might be causing some issues in the translation. If you encounter any specific translation issues or need further clarification on any parts of the code, please feel free to ask.

英文:

I have two entities WorkHolidayEntity and WorkHolidaySegmentEntity. I am using a composite key using EmbeddedId in these entity.
WorkHolidaySegmentEntity

package com.example.demo.model;

import org.hibernate.annotations.Type;

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;


@Entity
@Table(name = &quot;WORK_PROCESSED_SEGMENT&quot;)
@NamedQuery(name = &quot;WorkHolidaySegmentEntity.findAll&quot;, query = &quot;SELECT w FROM WorkHolidaySegmentEntity w&quot;)

public class WorkHolidaySegmentEntity extends Model {

	/**
	 *
	 */
	private static final long serialVersionUID = -5149257772387077483L;

	@EmbeddedId
	private GenericPrimaryKey id;



	@OneToOne(fetch= FetchType.EAGER)
	@JoinColumns({
        @JoinColumn(name=&quot;WORK_ITEM_ID&quot;, referencedColumnName=&quot;WORK_ITEM_ID&quot;, insertable = false, updatable = false)
	})
	private WorkHolidayEntity workHolidayEntity ;

	@Column(name=&quot;WORK_ITEM_ID&quot;)
    @NotNull
	private Long workItemId;

	@Column(name=&quot;PAYCODE_ID&quot;)
	private Long paycodeId;

	@Column(name=&quot;DURATION_IN_DAYS&quot;)
	private BigDecimal durationInDays;

	@Column(name=&quot;DURATION_IN_SECONDS&quot;)
	private Long durationInSeconds;

	@Column(name=&quot;START_DATE_TIME&quot;)
    //@Type(type = &quot;org.jadira.usertype.dateandtime.threeten.PersistentLocalDateTime&quot;)
    @NotNull
    private LocalDateTime startDateTime;

	@Column(name=&quot;MONEY_AMOUNT&quot;)
	private BigDecimal moneyAmount;

	public LocalDateTime getStartDateTime() {
        return workHolidayEntity.getApplyDate().atStartOfDay();
    }

	@Override
	public boolean isNew() {
		return false;
	}

	public GenericPrimaryKey getId() {
		return id;
	}


	public void setId(GenericPrimaryKey id) {
		this.id = id;
	}


	public Long getWorkItemId() {
		return workItemId;
	}

	public void setWorkItemId(Long workItemId) {
		this.workItemId = workItemId;
	}

	public BigDecimal getDurationInDays() {
		return durationInDays;
	}

	public void setDurationInDays(BigDecimal durationInDays) {
		this.durationInDays = durationInDays;
	}

	public Long getDurationInSeconds() {
		return durationInSeconds;
	}

	public void setDurationInSeconds(Long durationInSeconds) {
		this.durationInSeconds = durationInSeconds;
	}

	public BigDecimal getMoneyAmount() {
		return moneyAmount;
	}

	public void setMoneyAmount(BigDecimal moneyAmount) {
		this.moneyAmount = moneyAmount;
	}

	public Long getPaycodeId() {
		return paycodeId;
	}


	public void setPaycodeId(Long paycodeId) {
		this.paycodeId = paycodeId;
	}

	public Long getHolidayId() {
		return workHolidayEntity.getHolidayId() ;
	}

	public Long getLaborAccountId() {
		return workHolidayEntity.getLaborAccountId() ;
	}

	public Long getOrgJobId() {
		return workHolidayEntity.getOrgJobId() ;
	}
	public Long getTimeEntitySegmentTypeId() {
		return workHolidayEntity.getTimeEntitySegmentTypeId() ;
	}

    public LocalDate getApplyDate() {
        return workHolidayEntity.getApplyDate();
    }


}

workHolidayEntity

package com.example.demo.model;

import org.hibernate.annotations.Type;

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.time.LocalDate;


@Entity
@Table(name=&quot;WORK_HOLIDAY&quot;)
@NamedQuery(name=&quot;WorkHolidayEntity.findAll&quot;, query=&quot;SELECT e FROM WorkHolidayEntity e&quot;)

public class WorkHolidayEntity extends Model{

	private static final long serialVersionUID = -3259133892721228837L;

	@EmbeddedId
	private GenericPrimaryKey id;


	@Column(name=&quot;WORK_ITEM_ID&quot;)
    @NotNull
	private Long workItemId;

	@Column(name=&quot;HOLIDAY_ID&quot;)
	private Long holidayId ;

	@Column(name=&quot;LABOR_ACCOUNT_ID&quot;)
	private Long laborAccountId ;

	@Column(name=&quot;ORGJOB_ID&quot;)
	private Long orgJobId ;

	@Column(name=&quot;TIME_ENTITY_SEGMENT_TYPE_ID&quot;)
	private Long timeEntitySegmentTypeId ;

    @Column(name=&quot;APPLY_DATE&quot;)
   // @Type(type = &quot;org.jadira.usertype.dateandtime.threeten.PersistentLocalDate&quot;)
    @NotNull
    private LocalDate applyDate ;

	@Override
	public GenericPrimaryKey getId() {
		return this.id;
	}

	@Override
	public boolean isNew() {
		return false;
	}

	public Long getWorkItemId() {
		return workItemId;
	}

	public void setWorkItemId(Long workItemId) {
		this.workItemId = workItemId;
	}

	public Long getHolidayId() {
		return holidayId;
	}

	public void setHolidayId(Long holidayId) {
		this.holidayId = holidayId;
	}

	public Long getLaborAccountId() {
		return laborAccountId;
	}

	public void setLaborAccountId(Long laborAccountId) {
		this.laborAccountId = laborAccountId;
	}

	public Long getOrgJobId() {
		return orgJobId;
	}

	public void setOrgJobId(Long orgJobId) {
		this.orgJobId = orgJobId;
	}

	public Long getTimeEntitySegmentTypeId() {
		return timeEntitySegmentTypeId;
	}

	public void setTimeEntitySegmentTypeId(Long timeEntitySegmentTypeId) {
		this.timeEntitySegmentTypeId = timeEntitySegmentTypeId;
	}

	public void setId(GenericPrimaryKey id) {
		this.id = id;
	}

    public LocalDate getApplyDate() {
        return applyDate;
    }

    public void setApplyDate(LocalDate applyDate) {
        this.applyDate = applyDate;
    }


}

Both of the Entity extends an abstract class Model

Model

public abstract class Model implements Persistable, Serializable {
    public Model() {
    }

    public boolean equals(Object obj) {
        if (null == obj) {
            return false;
        } else if (this == obj) {
            return true;
        } else if (!this.getClass().equals(obj.getClass())) {
            return false;
        } else {
            Model that = (Model)obj;
            return null == this.getId() ? false : this.getId().equals(that.getId());
        }
    }

    public int hashCode() {
        int hashCode = 17;
        hashCode = hashCode + (null == this.getId() ? 0 : this.getId().hashCode() * 31);
        return hashCode;
    }
}

The Embedabble class is

package com.example.demo.model;

import java.io.Serializable;
import java.math.BigInteger;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import javax.validation.constraints.NotNull;

@Embeddable
public class GenericPrimaryKey implements Serializable {
    private static final long serialVersionUID = -666538159041179819L;
    @Column(
            name = &quot;ID&quot;
    )
    @NotNull
    private Long id;

    public GenericPrimaryKey() {
    }

    public GenericPrimaryKey(Long id) {
        this.id = id;
    }

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public boolean equals(Object other) {
        if (this == other) {
            return true;
        } else if (!(other instanceof GenericPrimaryKey)) {
            return false;
        } else {
            GenericPrimaryKey castOther = (GenericPrimaryKey)other;
            return this.id.equals(castOther.id);
        }
    }

    @Override
    public int hashCode() {
    final int prime = 31;
    int hash = 17;
    hash = hash * prime + this.id.intValue();

    return hash;
}
}

My RepositoryImpl class has below implemenattion

public List&lt;WorkHolidaySegmentEntity&gt; findWorkHolidayByWorkItemIds(List&lt;Long&gt; workItemIdList) {
		if (workItemIdList == null || workItemIdList.isEmpty())
			return new ArrayList&lt;&gt;() ;
	       Session session = entityManager.unwrap(Session.class);
	        Query query = session.createQuery(&quot;select whs FROM WorkHolidaySegmentEntity whs &quot; +
					 &quot;inner join fetch whs.workHolidayEntity wh &quot; +
	                &quot; where whs.workItemId IN (:workItemIdList)&quot;) ;

	        query.setParameterList(&quot;workItemIdList&quot;, workItemIdList);

	        List&lt;WorkHolidaySegmentEntity&gt; workHolidays = query.list();
	        return workHolidays;
	}

when i am running the code i am getting propertyAccessException

PropertyAccessException Error accessing field [private java.lang.Long com.example.demo.model.GenericPrimaryKey.id] by reflection for persistent property [com.example.demo.model.GenericPrimaryKey#id] : com.example.demo.model.WorkHolidayEntity@11&quot;

Not sure why it us unable to access the id field.

Things work fine if i use Long instead of EmbeddedId
i.e. replacing @EmbeddedId
private GenericPrimaryKey id; with @ID private Long id;

Can anyone let me know why i am getting the error when using an EmbeddedId.

Error Stack:

Exception in thread &quot;main&quot; javax.persistence.PersistenceException: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Long com.example.demo.model.GenericPrimaryKey.id] by reflection for persistent property [com.example.demo.model.GenericPrimaryKey#id] : com.example.demo.model.WorkHolidayEntity@11
	at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1535)
	at com.example.demo.repository.WorkHolidayJpaRepositoryImpl.findWorkHolidayByWorkItemIds(WorkHolidayJpaRepositoryImpl.java:33)
	at com.example.demo.repository.WorkHolidayJpaRepositoryImpl$$FastClassBySpringCGLIB$$4c260788.invoke(&lt;generated&gt;)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.example.demo.repository.WorkHolidayJpaRepositoryImpl$$EnhancerBySpringCGLIB$$c7a03c65.findWorkHolidayByWorkItemIds(&lt;generated&gt;)
	at com.example.demo.DemoApplication.main(DemoApplication.java:25)
Caused by: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Long com.example.demo.model.GenericPrimaryKey.id] by reflection for persistent property [com.example.demo.model.GenericPrimaryKey#id] : com.example.demo.model.WorkHolidayEntity@11
	at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:75)
	at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:59)
	at org.hibernate.type.ComponentType.getPropertyValue(ComponentType.java:419)
	at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:246)
	at org.hibernate.engine.spi.EntityUniqueKey.generateHashCode(EntityUniqueKey.java:67)
	at org.hibernate.engine.spi.EntityUniqueKey.&lt;init&gt;(EntityUniqueKey.java:48)
	at org.hibernate.type.ManyToOneType.resolve(ManyToOneType.java:252)
	at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:226)
	at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:160)
	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1179)
	at org.hibernate.loader.Loader.processResultSet(Loader.java:1028)
	at org.hibernate.loader.Loader.doQuery(Loader.java:964)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
	at org.hibernate.loader.Loader.doList(Loader.java:2815)
	at org.hibernate.loader.Loader.doList(Loader.java:2797)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2629)
	at org.hibernate.loader.Loader.list(Loader.java:2624)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:506)
	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:396)
	at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:219)
	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1396)
	at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1558)
	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1526)
	... 13 more
Caused by: java.lang.IllegalArgumentException: Can not set java.lang.Long field com.example.demo.model.GenericPrimaryKey.id to com.example.demo.model.WorkHolidayEntity
	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
	at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
	at sun.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36)
	at java.lang.reflect.Field.get(Field.java:393)
	at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:71)
	... 35 more

huangapple
  • 本文由 发表于 2020年4月8日 14:40:08
  • 转载请务必保留本文链接：https://java.coder-hub.com/61094698.html
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