Apply where clause on Sub-Class using HQL

Question

I have one scenario as following

Class A {
    String id;
    List<B> lstB;
}

Class B {
    String id;
    String name;
}

Class C extends B {
    String location;
}

For above mapping here is my Hibernate mapping

<class name="A" table="A">
    <id name="id" type="java.lang.String" column="ID" length="50">
        <generator class="assigned" />
    </id>
    <set name="lstB" table="A_B" lazy="true">
        <key column="A_ID" />
        <many-to-many column="B_ID" class="B" />
    </set>
</class>

<class name="B" table="B">
    <id name="id" type="java.lang.String" column="ID" length="50">
        <generator class="assigned" />
    </id>
    <property name="name">
        <column name="NAME"/>
    </property>
    <discriminator column="DISCRIMINATOR" not-null="false" />
    <subclass name="C" discriminator-value="C">
        <property name="location">
            <column name="LOCATION"/>
        </property>             
    </subclass>
</class>

Now I want to retrieve List of B and C objects on the basis of following given parameters.

1) id given from A.

2) Location from C.

Now if result object is instance of B then just add in list but if it is instance of C then have to verify with Location name passed in where clause.

Can I achieve this using HQL? or I have to go with Criteria API? Can we check instance of object from HQL itself?