Hi,
Want to know how to search for a particular object based on composed object.

For Ex:
I have

ClassA representing TableA and ClassB representing TableB. THere is a many to one relationship between TableA and Table with column Variable1 i.e. Variable1 in Table B is foreign key to Variable1 in TableA.

public ClassA implements Serializable {
String var1;
String var2;
ClassB classB;
//getters and setters for all three variables.
}

public ClassB implements Serializable {
String variable1;
String variable2;
//getters and setters for all three variables.
}

mappingxml:
<hibernate-mapping>
<class name="test.classA">
<property name="var1">
<property name="var1">
<many-to-one name="classB" column="variable1">
</class>
<class name="test.classB">
<property name="variable1">
<property name="variable2">
</class>
</hibernate-mapping>

I am using Criteria object to do querying.

String var1Value="test";
String var2Value = "test2";
String variable1Value = "test3";
Criteria crit = sess.createCriteria(test.ClassA.class);
if(str1!=null)crit.add( Expression.like("var1", str1) );
if(str2!=null)crit.add( Expression.like("var2", str2) );
if(variable1Value!=null)crit.add( Expression.eq("classB", variable1Value) );

List result = crit.list();


Its actually printing the sql with correct final where clause which is something like
"select var1, var2, variable1 from classA as classA ......... where ...
and this.Variable1=?"
and then the error:
Error Creating QueryNo persister for: java.lang.String


The third if statement is giving me this error...?

Whats the bestway of doing these kind of searches..? I mean Searching for an object based on a variable of another object which it composes..?

Thanks
Rajeev.

Intead of:

You need to do something like: