Criteria strange behavior

[edulid]

I have a strange behavior while using Criteria:

Everything is normal if I use this:

Criteria c = new Criteria();
c.addCriteria("schultyp",schultyp);
fetchData(c);

The criteria is sent with the DSRequest:

DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        schultyp:2
    },
    operationConfig:{
        dataSource:"schuelerSimpleView",
        operationType:"fetch",
        textMatchStyle:"exact"
    },
    startRow:0,
    endRow:75,
    sortBy:[
        "f_name",
        "f_vorname",
        "f_geb_datum"
    ],
    componentId:"isc_SchuelerListGrid_0",
    appID:"builtinApplication",
    operation:"schuelerSimpleView_fetch",
    oldValues:{
        schultyp:2
    }
}

So that is the normal behavior: the "schultyp" criteria are sent.

But if I use this:

Criteria c = new Criteria();
c.addCriteria("schultyp",schultyp);
setCriteria( c );
fetchData();

the criteria are NOT sent:

Request #1 (DSRequest) payload: {
    criteria:{
    },
    operationConfig:{
        dataSource:"schuelerSimpleView",
        operationType:"fetch",
        textMatchStyle:"exact"
    },
    startRow:0,
    endRow:75,
    sortBy:[
        "f_name",
        "f_vorname",
        "f_geb_datum"
    ],
    componentId:"isc_SchuelerListGrid_0",
    appID:"builtinApplication",
    operation:"schuelerSimpleView_fetch",
    oldValues:{
    }

Why? Shouldn't it have the same behavior as above?

I am using SmartGWT 2.5 EE, and my DS is this:

<DataSource
    ID="schuelerSimpleView"
	serverType="sql"
	tableName="t_schueler" 
>

    <fields>
    	<field name="f_schueler_id"   type="integer"  primaryKey="true" />
        <field name="f_name"  type="text" required="true" />
        <field name="f_vorname"   type="text"/>
        <field name="f_geb_datum"   type="date" required="true"/>
       	<field name="schultyp" type="integer" />
        
    </fields>
		
     </operationBindings>

</DataSource>

I am using the criteria on a class that extends ListGrid

Thank you

[Isomorphic]

That's what fetchData() is documented to do. Pass criteria to it - the absence of criteria means to use no criteria.

[edulid]

Thanks for your reply.

In the docs it says:
"public void fetchData()
Description copied from interface: DataBoundComponent
Uses a "fetch" operation on the current DataSource to retrieve data that matches the provided criteria, and displays the matching data in this component. "

and

public void setCriteria(Criteria criteria)

Sets this component's filter criteria. Default implementation calls this.data.setCriteria()

Isn't the "provided criteria" documented on the fetchData() method the criteria we passed before with setCriteria() ? If not, what is the "provided criteria" in fetchData() (without arguments) ? And what does setCriteria() change in the ListGrid, if not its criteria used for fetching?
sorry but that is confusing.

[Isomorphic]

Blank criteria (matches anything).