Access nested property in properties block in criteria query

Hibernate ORM
1

Hello Hibernate Folks,

I have the following properties block in my hibernate mapping:

    <class name="de.bayernlb.kundenportal.businessclasses.bankaccount.BankAccount"
           table="KP_CREDITACCOUNT">
        <id name="bankAccountId"
            column="CREDITACCOUNTID"
            type="java.lang.Long"
            access="field">
            <generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">
                <param name="sequence_name">KP_SEQUENCE_BANKACCOUNT</param>
            </generator>
        </id>
        <properties name="bankAccountKey">
            <property name="bankAccountId"
                      type="java.lang.Long"
                      column="CREDITACCOUNTID"
                      insert="false"
                      update="false"/>
            <property name="imported"
                      column="IMPORTED"
                      access="field"
                      insert="true"
                      update="true">
                <type name="de.bayernlb.kundenportal.persistence.HibernateTypeStringToBoolean">
                    <param name="falseValue">0</param>
                    <param name="trueValue">1</param>
                </type>
            </property>
        </properties>
        ...
    </class>

The class BankAccount has the attributes bankAccountId and imported:

public abstract class BankAccount implements Comparable, Localizable, Serializable {
    private Long bankAccountId;
    private boolean imported = true;
    ...
}

How can I access the imported property in the following criteria. When I try this:

CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
...
criteriaBuilder.isTrue(root.get("imported"))

I get the following error:

Caused by: java.lang.IllegalArgumentException: Unable to locate Attribute  with the the given name [imported] on this ManagedType [de.bayernlb.kundenportal.businessclasses.bankaccount.BankAccount]

If I try this:

criteriaBuilder.isTrue(root.get("bankAccountKey").get("imported"))

I get the following error:

Caused by: java.lang.IllegalArgumentException: Unable to locate Attribute  with the the given name [bankAccountKey] on this ManagedType [de.bayernlb.kundenportal.businessclasses.bankaccount.BankAccount]
	at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.checkNotNull(AbstractManagedType.java:147)
	at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:118)
	at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:43)
	at org.hibernate.query.criteria.internal.path.AbstractFromImpl.locateAttributeInternal(AbstractFromImpl.java:111)
	at org.hibernate.query.criteria.internal.path.AbstractPathImpl.locateAttribute(AbstractPathImpl.java:204)
	at org.hibernate.query.criteria.internal.path.AbstractPathImpl.get(AbstractPathImpl.java:177)

Thanks for hints
Thomas Mayr