use of org.onosproject.net.pi.impl.CriterionTranslator.CriterionTranslatorException in project onos by opennetworkinglab.
the class CriterionTranslatorHelper method translateCriterion.
/**
* Translates a given criterion instance to a PiFieldMatch with the given id, match type, and bit-width.
*
* @param fieldId PI match field identifier
* @param criterion criterion
* @param matchType match type
* @param bitWidth size of the field match in bits
* @return a PI field match
* @throws PiTranslationException if the criterion cannot be translated (see exception message)
*/
static PiFieldMatch translateCriterion(Criterion criterion, PiMatchFieldId fieldId, PiMatchType matchType, int bitWidth) throws PiTranslationException {
if (!TRANSLATORS.containsKey(criterion.getClass())) {
throw new PiTranslationException(format("Translation of criterion class %s is not implemented.", criterion.getClass().getSimpleName()));
}
try {
final CriterionTranslator translator = TRANSLATORS.get(criterion.getClass()).newInstance();
translator.init(criterion, bitWidth);
switch(matchType) {
case EXACT:
return new PiExactFieldMatch(fieldId, translator.exactMatch());
case OPTIONAL:
return new PiOptionalFieldMatch(fieldId, translator.exactMatch());
case TERNARY:
final Pair<ImmutableByteSequence, ImmutableByteSequence> tp = translator.ternaryMatch();
return new PiTernaryFieldMatch(fieldId, tp.getLeft(), tp.getRight());
case LPM:
final Pair<ImmutableByteSequence, Integer> lp = translator.lpmMatch();
return new PiLpmFieldMatch(fieldId, lp.getLeft(), lp.getRight());
default:
throw new PiTranslationException(format("Translation of criterion %s (%s class) to match type %s is not implemented.", criterion.type().name(), criterion.getClass().getSimpleName(), matchType.name()));
}
} catch (ByteSequenceTrimException e) {
throw new PiTranslationException(format("Size mismatch for criterion %s: %s", criterion.type(), e.getMessage()));
} catch (CriterionTranslatorException e) {
throw new PiTranslationException(format("Unable to translate criterion %s: %s", criterion.type(), e.getMessage()));
} catch (InstantiationException | IllegalAccessException e) {
// Was not able to instantiate the criterion translator.
throw new IllegalStateException(e);
}
}
Aggregations