JBossDeveloper

I have used IGx89's converter and it is working perfectly for me....

I've made a few slight changes but nothing major... other then that I have moved the Store outside the converter.

Oh and I have done some specific stuff for my project to make it easier for me but you can get rid of all that.

So for anyone interested:

ObjectConverter.java

package gekko.web.converter;

import static org.jboss.seam.ScopeType.CONVERSATION;
import gekko.util.StringUtils;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.ConverterException;

import org.jboss.seam.Seam;
import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.faces.Converter;
import org.jboss.seam.annotations.intercept.BypassInterceptors;

@Name("GenericObjectConverter")
@Scope(CONVERSATION)
@Install(precedence = Install.APPLICATION)
@Converter
@BypassInterceptors
public class ObjectConverter implements javax.faces.convert.Converter {

 @Override
 public Object getAsObject(FacesContext context, UIComponent component,
 String value) throws ConverterException {

 if (value == null) {
 return null;
 }
 return ObjectConverterStore.instance().get(value);
 }

 @Override
 public String getAsString(FacesContext context, UIComponent component,
 Object value) throws ConverterException {

 if (value == null) {
 return null;
 }

 String key = ObjectConverterStore.instance().contains(value);
 if (!StringUtils.isBlank(key)) {
 return key;
 }

 if(context.getApplication().getStateManager().isSavingStateInClient(context)
 && Seam.isEntityClass(value.getClass())) {
 throw new ConverterException("ObjectConverter is unable to handle entity classes when client-side " +
 "state saving is enabled. Please use EntityConverter instead, or enable server-side state saving");
 }

 return ObjectConverterStore.instance().put(value);

 }

}

and

ObjectConverterStore.java

package gekko.web.converter;

import static org.jboss.seam.ScopeType.PAGE;
import static org.jboss.seam.annotations.Install.APPLICATION;

import gekko.domain.AbstractEntityId;
import gekko.domain.PersistentEntity;

import java.rmi.server.UID;
import java.util.HashMap;
import java.util.Map;

import org.jboss.seam.Component;
import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.contexts.Contexts;

@Name("ObjectConverterStore")
@Install(precedence = APPLICATION)
@Scope(PAGE)
public class ObjectConverterStore {

 private final Map<String, Object> objects = new HashMap<String, Object>();

 // Add an object to the store
 public String put(Object entity) {
 String key;
 if (entity instanceof PersistentEntity) {
 //If this is a compound key then we need to use something else
 if (((PersistentEntity)entity).getId() instanceof AbstractEntityId) {
 key = Integer.toString(((PersistentEntity)entity).getId().hashCode());
 } else {
 key = ((PersistentEntity)entity).getId().toString();
 }

 } else {
 key = new UID().toString();
 }
 objects.put(key, entity);
 return key;
 }

 // Get an object from the store
 public Object get(String key) {
 return objects.get(key);
 }

 // Check if store contains the object already.
 public String contains(Object object) {
 for (Map.Entry<String, Object> entry : objects.entrySet()) {
 if (entry.getValue().equals(object)) {
 return entry.getKey();
 }
 }
 return null;
 }


 public static ObjectConverterStore instance() {
 if (!Contexts.isPageContextActive()) {
 throw new IllegalArgumentException("Page scope not active");
 }
 return (ObjectConverterStore) Component
 .getInstance(ObjectConverterStore.class);
 }
}

If you have a look at ObjectConverterStore where i have

if (entity instanceof PersistentEntity) {
 //If this is a compound key then we need to use something else
 if (((PersistentEntity)entity).getId() instanceof AbstractEntityId) {
 key = Integer.toString(((PersistentEntity)entity).getId().hashCode());
 } else {
 key = ((PersistentEntity)entity).getId().toString();
 }

} else {
 key = new UID().toString();
}

You could just use the line

key = new UID().toString();

I've only done it that way to make some of my keys a little more meaningful... and so that I can match objects to ones that are inside my list based on id.

At least this is a working example that people can get some ideas off anyway. :)