IBM Support

PH37833: ECLIPSELINK CRITERIABUILDER COALESCE CLASSCASTEXCEPTION WHEN USING LITERALS

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APAR status

  • Closed as program error.

Error description

  • When using the method ´coalesce´ with an expression and a
    literal such as:
    
    criteriaBuilder.coalesce(root.get(attribute),0d)
    
    The following exception is thrown:
    ´´´
        Caused by: java.lang.ClassCastException: java.lang.Double
    cannot be cast to
    org.eclipse.persistence.internal.jpa.querydef.InternalSelection
            at
    org.eclipse.persistence.internal.jpa.querydef.CriteriaBuilderImp
    l.coalesce(CriteriaBuilderImpl.java:2117)
    ´´´
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server - Java Persistence API - JPA 2.1 &   *
    *                  EclipseLink                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: EclipseLink throws a                    *
    *                      ClassCastException when using           *
    *                      literals in CriteriaBuilder Coalesce    *
    *                      expressions                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When using a CriteriaBuilder coalesce expression with literal
    values, EclipseLink throws an exception as it attempts to cast
    the literal object to an internal object type.
    Example:
    ´´´
    CriteriaQuery<Object[]> criteriaQuery =
    builder.createQuery(Object[].class);
    Root<CoalesceEntity> root =
    criteriaQuery.from(CoalesceEntity.class);
    Subquery<Long> countQuery =
    criteriaQuery.subquery(Long.class);
    Root<CoalesceEntity> countRoot =
    countQuery.from(CoalesceEntity.class);
    countQuery.select(builder.count(countRoot));
    // Pass the literal value directly
    Expression<Long> coalesceExp =
    builder.coalesce(countQuery, 0L);
    criteriaQuery.select(
    builder.array(
    root.get("description"), coalesceExp));
    &#180;&#180;&#180;
    Example Exception:
    &#180;&#180;&#180;
    Caused by: java.lang.ClassCastException: java.lang.Double
    cannot be cast to
    org.eclipse.persistence.internal.jpa.querydef.InternalSelection
    at
    org.eclipse.persistence.internal.jpa.querydef.CriteriaBuilderImp
    l.coalesce(CriteriaBuilderImpl.java:2117)
    &#180;&#180;&#180;
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PH37833

  • Reported component name

    WEBSPHERE APP S

  • Reported component ID

    5724J0800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-06-03

  • Closed date

    2021-07-12

  • Last modified date

    2021-07-12

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WEBSPHERE APP S

  • Fixed component ID

    5724J0800

Applicable component levels

  • R900 PSY

       UP

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900"}]

Document Information

Modified date:
16 July 2021