package er.extensions.woextensions;
import org.apache.commons.lang.ObjectUtils;
import com.webobjects.appserver.WOContext;
import com.webobjects.eocontrol.EOEnterpriseObject;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSKeyValueCoding;
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.
*
* @author ak
*/
public class WOToOneRelationship 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 Object _selection;
public WOToOneRelationship(WOContext aContext) {
super(aContext);
}
@Override
public void reset() {
super.reset();
_selection = null;
}
@Override
public void awake() {
super.awake();
_selection = null;
}
public void updateSourceObject(Object value) {
String realRelationshipKey = realRelationshipKey();
Object realSourceObject = realSourceObject();
Object currentValue = NSKeyValueCoding.Utility.valueForKey(realSourceObject, realRelationshipKey);
if (ObjectUtils.notEqual(value, currentValue)) {
if(realSourceObject instanceof EOEnterpriseObject) {
EOEnterpriseObject eo = (EOEnterpriseObject)realSourceObject;
if(value instanceof EOEnterpriseObject) {
eo.addObjectToBothSidesOfRelationshipWithKey((EOEnterpriseObject)value, realRelationshipKey);
} else {
Object oldValue = eo.valueForKey(realRelationshipKey);
if(oldValue instanceof EOEnterpriseObject) {
eo.removeObjectFromBothSidesOfRelationshipWithKey((EOEnterpriseObject)oldValue, realRelationshipKey);
} else {
// handle attributes
eo.takeValueForKey(value, realRelationshipKey);
}
}
} else {
// handle every other type of object,
// we rely on NSMutableDictionary.takeValueForKey(null, someKey) will actually remove the object
NSKeyValueCoding.Utility.takeValueForKey(realSourceObject, value, realRelationshipKey);
}
}
}
public void setSelection(Object value) {
if ((value!=null) && (value instanceof NSArray)) {
log.warn("We were passed an array but expected an EO. Compensating by choosing first element");
NSArray array = (NSArray)value;
if (array.count() == 0) {
value = null;
} else {
value = array.objectAtIndex(0);
}
}
_selection = value;
if (value==NO_SELECTION_STRING) {
value = null;
}
updateSourceObject(value);
if (hasBinding("selection") && !(sourceObject() instanceof EOEnterpriseObject)) {
setValueForBinding(value, "selection");
}
}
@Override
public NSArray currentValues() {
Object current = selection();
return current == null ? NSArray.EmptyArray : new NSArray(current);
}
public Object selection() {
if (_selection == null) {
Object object = realSourceObject();
String key = realRelationshipKey();
Object selection = NSKeyValueCoding.Utility.valueForKey(object,key);
if (selection != null && selection instanceof EOEnterpriseObject) {
EOEnterpriseObject eo = (EOEnterpriseObject)selection;
if (eo.editingContext() != editingContext()) {
selection = ERXEOControlUtilities.localInstanceOfObject(editingContext(), eo);
}
}
setSelection(selection);
}
// deal with isMandatory
if ((_selection==null) && !isMandatory()) {
setSelection(NO_SELECTION_STRING);
}
//If using a browser, we have to return an array. Be sure we don't stick null into an array.
Object selection;
if (isBrowser()) {
if (_selection == null) {
selection = NSArray.EmptyArray;
}
else {
selection = new NSArray(_selection);
}
}
else {
selection = _selection;
}
return selection;
}
@Override
public NSArray theList() {
if (_list==null) {
_list = super.theList();
if (!isMandatory()) {
NSMutableArray array = _list.mutableClone();
array.insertObjectAtIndex(NO_SELECTION_STRING, 0);
_list = array;
}
}
return _list;
}
@Override
protected boolean isSingleSelection() {
return true;
}
}