/**
* Implements equals for a typerel node. Two nodes are equal if the snumber and dnumber fields are
* the same, and the rnumber fields are the same, or one of these is '-1' (don't care).
*
* @since MMBase-1.6.2
*/
@Override
public boolean equals(MMObjectNode o1, MMObjectNode o2) {
if (o2.getBuilder() instanceof TypeRel) {
int r1 = o1.getIntValue("rnumber");
int r2 = o2.getIntValue("rnumber");
return o1.getIntValue("snumber") == o2.getIntValue("snumber")
&& o1.getIntValue("dnumber") == o2.getIntValue("dnumber")
&& (r1 == -1 || r2 == -1 || r1 == r2);
}
return false;
}
/**
* Retrieves all relations which are 'allowed' for a specified node, that is, where the node is
* either allowed to be the source, or to be the destination (but where the corresponing relation
* definition is bidirectional). The allowed relations are determined by the type of the node
*
* @param node The node to retrieve the allowed relations of.
* @return An <code>Enumeration</code> of nodes containing the typerel relation data
*/
public Enumeration<MMObjectNode> getAllowedRelations(MMObjectNode node) {
return getAllowedRelations(node.getBuilder().getNumber());
}