private List<OFAction> buildActions(List<Instruction> treatments) {
if (treatment == null) {
return Collections.emptyList();
}
boolean tableFound = false;
List<OFAction> actions = new LinkedList<>();
for (Instruction i : treatments) {
switch (i.type()) {
case DROP:
case NOACTION:
return Collections.emptyList();
case L0MODIFICATION:
actions.add(buildL0Modification(i));
break;
case L2MODIFICATION:
actions.add(buildL2Modification(i));
break;
case L3MODIFICATION:
actions.add(buildL3Modification(i));
break;
case L4MODIFICATION:
actions.add(buildL4Modification(i));
break;
case OUTPUT:
OutputInstruction out = (OutputInstruction) i;
OFActionOutput.Builder action =
factory().actions().buildOutput().setPort(OFPort.of((int) out.port().toLong()));
if (out.port().equals(PortNumber.CONTROLLER)) {
action.setMaxLen(OFPCML_NO_BUFFER);
}
actions.add(action.build());
break;
case GROUP:
GroupInstruction group = (GroupInstruction) i;
OFActionGroup.Builder groupBuilder =
factory().actions().buildGroup().setGroup(OFGroup.of(group.groupId().id()));
actions.add(groupBuilder.build());
break;
case TABLE:
// FIXME: should not occur here.
tableFound = true;
break;
default:
log.warn("Instruction type {} not yet implemented.", i.type());
}
}
if (tableFound && actions.isEmpty()) {
// handles the case where there are no actions, but there is
// a goto instruction for the next table
return Collections.emptyList();
}
return actions;
}
/**
* Matches the contents of a group instruction.
*
* @param instructionJson JSON instruction to match
* @param description Description object used for recording errors
* @return true if contents match, false otherwise
*/
private boolean matchGroupInstruction(JsonNode instructionJson, Description description) {
final String jsonType = instructionJson.get("type").textValue();
GroupInstruction instructionToMatch = (GroupInstruction) instruction;
if (!instructionToMatch.type().name().equals(jsonType)) {
description.appendText("type was " + jsonType);
return false;
}
final int jsonGroupId = instructionJson.get("groupId").intValue();
if (instructionToMatch.groupId().id() != jsonGroupId) {
description.appendText("groupId was " + jsonGroupId);
return false;
}
return true;
}
