Primefaces Datatable converter with filtering - jsf

Question

I have the datatable and selectonemenu inside it.
I want to show images in select one menu items.So a have Rating class and converter ratingConverter for Rating class.
I have the next problem here: filtering by this column works just once! When I try to change item, method load(..) from LazyComicsDataModel calls. But after
filtering one time nothing worked! Method load not calls anymore. There are't any exceptions in server.log. When I don't use converter and class Rating (use just String class) it works right any number of times.
I would like to get any ideas why it might be happened.
Code:
Part of xhtml page:
<p:ajax
event="rowSelect"
update=":form:comicsDetail"
oncomplete="PF('comicsDialog').show()"/>
<p:column width="20%"
headerText="#{comicsCatalogueView.columnComicsRating}"
sortBy="#{comics.rating}"
filterBy="#{comics.rating}"
filterMatchMode="exact" >
<f:facet name="filter" >
<p:selectOneMenu
value="#{comicsCatalogueView.rating}"
var="r"
onchange="PF('comicsTable').filter()"
converter="ratingConverter"
>
<f:selectItem
value="#{null}"
itemValue="#{null}" />
<f:selectItems
value="#{comicsFinderManagedBean.ratings}"
var="rating"
itemLabel="#{rating.value} - #{rating.value+1}"
itemValue="#{rating}"
/>
<p:column>
<p:graphicImage value="#{r.image}"/>
</p:column>
</p:selectOneMenu>
</f:facet>
<h:panelGroup>
<pf:rating disabled="true"
totalStars="5"
step="0.1"
value="#{comics.rating}"
>
</pf:rating>
</h:panelGroup>
</p:column>
Rating class:
public class Rating {
public Rating(Integer value, String image) {
this.value = value;
this.image = image;
}
private Integer value;
private String image;
public Integer getValue() {
return value;
}
public void setValue(Integer value) {
this.value = value;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
#Override
public int hashCode() {
int hash = 5;
hash = 71 * hash + (this.value != null ? this.value.hashCode() : 0);
hash = 71 * hash + (this.image != null ? this.image.hashCode() : 0);
return hash;
}
#Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Rating other = (Rating) obj;
if (this.value != other.value && (this.value == null || !this.value.equals(other.value))) {
return false;
}
if ((this.image == null) ? (other.image != null) : !this.image.equals(other.image)) {
return false;
}
return true;
}
#Override
public String toString() {
return "Rating{" + "value=" + value + ", image=" + image + '}';
}
Rating converter:
#FacesConverter("ratingConverter")
public class RatingConverter implements Converter {
#Override
public Object getAsObject(FacesContext fc, UIComponent uic, String value) {
if(value != null && value.trim().length() > 0) {
ComicsFinderManagedBean ratingFinderManagedBean = (ComicsFinderManagedBean)
fc.getExternalContext().getApplicationMap().get("comicsFinderManagedBean");
return ratingFinderManagedBean.getRating(Integer.parseInt(value));
}
else {
return null;
}
}
#Override
public String getAsString(FacesContext fc, UIComponent uic, Object object) {
if(object != null) {
return String.valueOf(((Rating) object).getValue());
}
else {
return null;
}
}
}