/** @see org.eclipse.gef.commands.Command#canExecute() */
@Override
public boolean canExecute() {
boolean returnValue = true;
if (foreignEntity.equals(primaryEntity)) {
returnValue = false;
} else {
if (primaryEntity == null) {
return false;
} else {
// Check for existence of relationship already
List<ERDAssociation> relationships = primaryEntity.getPrimaryKeyRelationships();
for (int i = 0; i < relationships.size(); i++) {
ERDAssociation currentRelationship = relationships.get(i);
if (currentRelationship.getForeignKeyEntity().equals(foreignEntity)) {
returnValue = false;
break;
}
}
}
}
return returnValue;
}
