package er.extensions.woextensions;
import com.webobjects.appserver.WOContext;
import com.webobjects.eocontrol.EOEnterpriseObject;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSKeyValueCoding;
import com.webobjects.foundation.NSKeyValueCodingAdditions;
import com.webobjects.foundation.NSMutableArray;
import er.extensions.components.ERXArrayChooser;
import er.extensions.eof.ERXEOControlUtilities;
/**
* Back port from WO 5 WOExtensions. This component is binding compatible, but not source compatible.<br />
* It can also handle non-relationships, you must set the possibleChoices to an NSArray and
* relationshipName to a property name. It works whether the object is an EO or not. The name could/should probably
* change because it handles not only relationships, but it was wrongly named n the first place...
*/
public class WOToManyRelationship extends ERXArrayChooser {
/**
* Do I need to update serialVersionUID?
* See section 5.6 <cite>Type Changes Affecting Serialization</cite> on page 51 of the
* <a href="http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf">Java Object Serialization Spec</a>
*/
private static final long serialVersionUID = 1L;
protected NSArray _selections;
public WOToManyRelationship(WOContext aContext) {
super(aContext);
}
@Override
public void reset() {
super.reset();
_selections = null;
}
public void updateSourceObject(NSArray newValues) {
Object realSourceObject = realSourceObject();
String realRelationshipKey = realRelationshipKey();
newValues = newValues != null ? newValues : NSArray.EmptyArray;
if (realSourceObject instanceof EOEnterpriseObject && // only add/remove if we have an EO and handle a relationship
((EOEnterpriseObject) realSourceObject).classDescriptionForDestinationKey(realRelationshipKey) != null) {
EOEnterpriseObject eo = (EOEnterpriseObject) realSourceObject;
NSArray currentValues = (NSArray) eo.valueForKey(realRelationshipKey);
currentValues = currentValues != null ? currentValues : NSArray.EmptyArray;
for (int i = currentValues.count() - 1; i >= 0; i--) {
EOEnterpriseObject o = (EOEnterpriseObject) currentValues.objectAtIndex(i);
if (newValues.indexOfIdenticalObject(o) == NSArray.NotFound) { // not found
eo.removeObjectFromBothSidesOfRelationshipWithKey(o, realRelationshipKey);
}
}
for (int i = newValues.count() - 1; i >= 0; i--) {
EOEnterpriseObject o = (EOEnterpriseObject) newValues.objectAtIndex(i);
if (currentValues.indexOfIdenticalObject(o) == NSArray.NotFound) { // not found
eo.addObjectToBothSidesOfRelationshipWithKey(o, realRelationshipKey);
}
}
} else {
// NOTE ak: this implementation is different from what JavaWOExtensions do.
// There, the existing array is fetched and added to/removed from. Here, we simply set the
// new array. I changed this because it looked like a bad idea to change the array without
// the sourceObjects's knowledge.
NSKeyValueCoding.Utility.takeValueForKey(realSourceObject,
(newValues instanceof NSMutableArray) ? newValues : newValues.mutableClone(),
realRelationshipKey);
}
}
public void setSelections(NSArray selections) {
// set selections to nil if it's an empty array
if ((selections == null) || (selections.count() == 0)) {
// deal with isMandatory
if (isMandatory() && (theList().count() > 0)) {
Object anObject = theList().objectAtIndex(0);
selections = new NSArray(anObject);
} else {
selections = null;
}
}
_selections = selections;
updateSourceObject(selections);
}
@Override
public NSArray currentValues() {
NSArray current = selections();
return current == null ? NSArray.EmptyArray : current;
}
public NSArray selections() {
if (_selections == null) {
NSArray oldValues = (NSArray) NSKeyValueCodingAdditions.Utility.valueForKeyPath(sourceObject(), relationshipKey());
if(oldValues != null) {
if(oldValues.lastObject() instanceof EOEnterpriseObject) {
oldValues = ERXEOControlUtilities.localInstancesOfObjects(editingContext(), oldValues);
}
}
setSelections(oldValues);
// deal with isMandatory
if ((_selections == null) && isMandatory()) {
if (theList().count() > 0) {
Object anObject = theList().objectAtIndex(0);
setSelections(new NSArray(anObject));
}
}
}
return _selections;
}
@Override
protected boolean isSingleSelection() {
return false;
}
}