/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.CompoundCommand#canExecute()
*/
@Override
public boolean canExecute() {
boolean sameProvider = false;
boolean mappingExisted = false;
if (srcProvider != null && targetProvider != null) {
sameProvider = srcProvider == targetProvider;
}
Collection<ParameterMapping> currMappings;
if (container instanceof FlowDiagram) {
currMappings = ((FlowDiagram) container).getParameterMappings();
} else {
currMappings = ((Activity) container).getParameterMappings();
}
for (ParameterMapping m : currMappings) {
if (m.getSrc() == src && m.getTarget() == target) {
mappingExisted = true;
break;
}
}
return super.canExecute() && src != target && !sameProvider && !mappingExisted;
}
private void init() {
if (src != null && target != null && newMapping != null && container != null) {
srcProvider = src.getProvider();
targetProvider = target.getProvider();
newMapping.setSrc(src);
newMapping.setTarget(target);
if (container instanceof FlowDiagram) {
add(
new SimpleAddEObjectCommand<FlowDiagram, ParameterMapping>(
newMapping,
FlowControlPackage.Literals.FLOW_DIAGRAM__PARAMETER_MAPPINGS,
(FlowDiagram) container));
} else if (container instanceof Activity) {
add(
new SimpleAddEObjectCommand<Activity, ParameterMapping>(
newMapping, FlowControlPackage.ACTIVITY__PARAMETER_MAPPINGS, (Activity) container));
}
}
}