public void addJoin(
final String joinType, final Joinable j, final HashMap<String, String> variableBindings) {
if (j == null) {
LOG.info("Skipping join");
return;
}
JoinConditions conditions = new JoinConditions();
for (MappableNodePattern existingVar : this.joinVars()) {
for (MappableNodePattern candidateVar : j.joinVars()) {
String existingVarName = existingVar.getVarName();
String candidateVarName = candidateVar.getVarName();
String candidateBinding = variableBindings.get(candidateVar.getVarName());
String existingBinding = existingVar.mappedName();
if (existingVarName.equals(candidateVarName)
&& existingBinding.equals(candidateBinding)) {
conditions.addCondition(existingBinding, " = ", candidateVar.mappedName());
}
}
}
addJoin(joinType, j, conditions);
}
public Set<MappableNodePattern> joinVars() {
HashSet<MappableNodePattern> joinVars = new HashSet<MappableNodePattern>();
for (Joinable joinable : joined) {
joinVars.addAll(joinable.joinVars());
}
return joinVars;
}
