public void apply() throws QueryException {
// See XQuery Update Facility 1.0: 3.2.2 upd:applyUpdates
// First all ops are sorted according to the order of their
// application which is determined by their type.
// The resulting list is then checked if some ops
// are performed twice or more on the same target node
Comparator<UpdateOp> orderByType =
new Comparator<UpdateOp>() {
@Override
public int compare(UpdateOp o1, UpdateOp o2) {
return o1.getType().compareTo(o2.getType());
}
};
Collections.sort(ops, orderByType);
for (int i = 0; i < ops.size(); i++) {
final UpdateOp op1 = ops.get(i);
if (checkOps.contains(op1.getType())) {
for (int j = i + 1; j < ops.size(); j++) {
final UpdateOp op2 = ops.get(j);
if (op2.getType() != op1.getType()) {
break;
}
checkCompatibility(op1, op2);
}
}
}
// finally apply all updates
for (final UpdateOp op : ops) {
if (log.isDebugEnabled()) {
log.debug(String.format("Applying pending update %s", op));
}
op.apply();
}
}
private void checkCompatibility(final UpdateOp op1, final UpdateOp op2) throws QueryException {
switch (op1.getType()) {
case RENAME:
if (op1.getTarget().equals(op2.getTarget())) {
throw new QueryException(
ErrorCode.ERR_UPDATE_DUPLICATE_RENAME_TARGET,
"Node %s is target of more than one replace operation.",
op2.getTarget());
}
break;
case REPLACE_NODE:
if (op1.getTarget().equals(op2.getTarget())) {
throw new QueryException(
ErrorCode.ERR_UPDATE_DUPLICATE_REPLACE_NODE_TARGET,
"Node %s is target of more than one replace node operation.",
op2.getTarget());
}
break;
case REPLACE_VALUE:
if (op1.getTarget().equals(op2.getTarget())) {
throw new QueryException(
ErrorCode.ERR_UPDATE_DUPLICATE_REPLACE_VALUE_TARGET,
"Node %s is target of more than one replace value operation.",
op2.getTarget());
}
break;
case REPLACE_ELEMENT_CONTENT:
if (op1.getTarget().equals(op2.getTarget())) {
throw new QueryException(
ErrorCode.ERR_UPDATE_DUPLICATE_REPLACE_VALUE_TARGET,
"Node %s is target of more than one replace element content operation.",
op2.getTarget());
}
break;
default:
// Do nothing.
}
}