休眠给出了一个奇怪的ClassCast例外(使用变形金刚)

2022-09-03 13:30:26

此代码:

@Override
public List<FactCodeDto> getAllFactsWithoutParentsAsFactDto() {
    String completeQuery = FactCodeQueries.SELECT_DTO_FROM_FACT_WITH_NO_PARENTS;
    Query query = createHibernateQueryForUnmappedTypeFactDto(completeQuery);

    List<FactCodeDto> factDtoList = query.list(); //line 133
    return factDtoList;
}

调用此方法:

private Query createHibernateQueryForUnmappedTypeFactDto(String sqlQuery) throws HibernateException {
    return FactCodeQueries.addScalars(createSQLQuery(sqlQuery)).setResultTransformer(Transformers.aliasToBean(FactCodeDto.class));
}

给了我一个ClassCastException ->跟踪的一部分:

Caused by: java.lang.ClassCastException: org.bamboomy.cjr.dto.FactCodeDto cannot be cast to java.util.Map
    at org.hibernate.property.access.internal.PropertyAccessMapImpl$SetterImpl.set(PropertyAccessMapImpl.java:102)
    at org.hibernate.transform.AliasToBeanResultTransformer.transformTuple(AliasToBeanResultTransformer.java:78)
    at org.hibernate.hql.internal.HolderInstantiator.instantiate(HolderInstantiator.java:75)
    at org.hibernate.loader.custom.CustomLoader.getResultList(CustomLoader.java:435)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2423)
    at org.hibernate.loader.Loader.list(Loader.java:2418)
    at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:336)
    at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:1898)
    at org.hibernate.internal.AbstractSessionImpl.list(AbstractSessionImpl.java:318)
    at org.hibernate.internal.SQLQueryImpl.list(SQLQueryImpl.java:125)
    at org.bamboomy.cjr.dao.factcode.FactCodeDAOImpl.getAllFactsWithoutParentsAsFactDto(FactCodeDAOImpl.java:133)

这很奇怪,因为实际上,如果你查找Hibernate的源代码,它会尝试这样做:

@Override
@SuppressWarnings("unchecked")
public void set(Object target, Object value, SessionFactoryImplementor factory) {
    ( (Map) target ).put( propertyName, value ); //line 102
}

这没有任何意义...

目标的类型是 Class,此代码尝试将其强制转换为 Map,

为什么它试图这样做???

任何指针都非常受欢迎...

我正在使用Hibernate 5(并且正在从3升级)...

编辑:我也使用Spring(4.2.1.RELEASE;也升级),它在部署时调用这些方法,任何调试指针也是最受欢迎的......

编辑2:(整个FactCodeDto类,根据要求)

package org.bamboomy.cjr.dto;

import org.bamboomy.cjr.model.FactCode;
import org.bamboomy.cjr.model.FactCodeType;
import org.bamboomy.cjr.utility.FullDateUtil;
import org.bamboomy.cjr.utility.Locales;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.util.Assert;

import java.util.*;

@Getter
@Setter
@ToString
public class FactCodeDto extends TreeNodeValue {

    private String cdFact;
    private String cdFactSuffix;
    private Boolean isSupplementCode;
    private Boolean isTitleCode;
    private Boolean mustBeFollowed;

    private Date activeFrom;
    private Date activeTo;
    private Boolean isCode;
    private Long idFact;
    private Long idParent;
    private String type;
    Map<Locale, String> description = new HashMap<Locale, String>(3);

    public FactCodeDto() {
    }

    public FactCodeDto(String prefix, String suffix) {
        super();
        this.cdFact = prefix;
        this.cdFactSuffix = suffix;
    }

    public FactCodeDto(String cdFact, String cdFactSuffix, Boolean isSupplementCode,  Boolean mustBeFollowed) {
        super();
        this.cdFact = cdFact;
        this.cdFactSuffix = cdFactSuffix;
        this.isSupplementCode = isSupplementCode;
        this.mustBeFollowed = mustBeFollowed;

    }

    public FactCodeDto(String cdFact, String cdFactSuffix, Boolean isSupplementCode,  Boolean mustBeFollowed, Long idFact, Long idParent, Boolean isCode, Boolean isTitleCode, Date from, Date to, Map<Locale, String> descriptions,String type) {
        super();
        this.cdFact = cdFact;
        this.cdFactSuffix = cdFactSuffix;
        this.isSupplementCode = isSupplementCode;
        this.mustBeFollowed = mustBeFollowed;
        this.idFact = idFact;
        this.idParent = idParent;
        this.isCode = isCode;
        this.isTitleCode = isTitleCode;
        this.activeFrom = from;
        this.activeTo = to;
        if (descriptions != null) {
            this.description = descriptions;
        }

        this.type = type;

    }

    public FactCodeDto(FactCode fc) {
        this(fc.getPrefix(), fc.getSuffix(), fc.isSupplementCode(), fc.isHasMandatorySupplCodes(), fc.getId(), fc.getParent(), fc.isActualCode(), fc.isTitleCode(), fc.getActiveFrom(), fc.getActiveTo(), fc.getAllDesc(),fc.getType().getCode());
    }

    public String formatCode() {
        return FactCode.formatCode(cdFact, cdFactSuffix);
    }

    public boolean isActive() {
        Date now = new Date(System.currentTimeMillis());
        return FullDateUtil.isBetweenDates(now, this.activeFrom, this.activeTo);

    }

    public void setDescFr(String s) {
        description.put(Locales.FRENCH, s);
    }

    public void setDescNl(String s) {
        description.put(Locales.DUTCH, s);
    }

    public void setDescDe(String s) {
        description.put(Locales.GERMAN, s);
    }

    /**
     * public String toString() {
     * StringBuilder sb = new StringBuilder();
     * sb.append(getIdFact() + ": ")
     * .append(getIdParent() + ": ")
     * .append(" " + cdFact + cdFactSuffix + ": " + (isSupplementCode ? "NO Principal " : "   Principal "))
     * .append((mustBeFollowed ? "    Must Be Followed " : "NOT Must Be Followed "));
     * return sb.toString();
     * }
     */

    public Map<Locale, String> getDescription() {
        return description;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        String fullCode = formatCode();
        result = prime * result + ((fullCode == null) ? 0 : fullCode.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        FactCodeDto other = (FactCodeDto) obj;

        return formatCode().equals(other.formatCode());
    }

    @Override
    public boolean isChildOf(TreeNodeValue value) {
        Assert.notNull(value);
        boolean isChild = false;
        if (value instanceof FactCodeDto) {
            if (this.getIdParent() != null) {
                isChild = this.getIdParent().equals(((FactCodeDto) value).getIdFact());
            }

        }
        return isChild;
    }

    @Override
    public boolean isBrotherOf(TreeNodeValue value) {
        Assert.notNull(value);
        boolean isBrother = false;
        if (value instanceof FactCodeDto) {
            if (this.getIdParent() != null) {
                isBrother = this.getIdParent().equals(((FactCodeDto) value).getIdParent());
            }

        }
        return isBrother;
    }

    @Override
    public boolean isParentOf(TreeNodeValue value) {
        Assert.notNull(value);
        boolean isParent = false;
        if (value instanceof FactCodeDto) {
            isParent = this.getIdFact().equals(((FactCodeDto) value).getIdParent());
        }
        return isParent;
    }


    @Override
    public int compareTo(TreeNodeValue to) {
        if (to instanceof FactCodeDto) {
            return formatCode().compareTo(((FactCodeDto) to).formatCode());
        } else return 1;

    }


    public String getCode() {
        return formatCode();
    }


}

答案 1

我发现AliasToBean在Hibernate 5中发生了变化。对我来说,为我的领域添加getter解决了这个问题。


答案 2

setter 和 getter 未正确映射到列名时,会发生此异常。确保查询具有正确的 getter 和 setter(正确的名称和正确的数据类型)。在此处阅读更多相关信息:

http://javahonk.com/java-lang-classcastexception-com-wfs-otc-datamodels-imagineexpirymodel-cannot-cast-java-util-map/


推荐