How to use

AvroUtils$SchemaPairCompatibility

in

com.moz.fiji.schema.util

return new SchemaPairCompatibility(
  compatibility,
  reader,

/**
 * Validates each of a set of reader schemas against each of a set of writer schemas.
 *
 * @param readerSchemas the set of reader schemas to validate.
 * @param writerSchemas the set of writer schemas to validate.
 * @return a list of error messages corresponding to each invalid combination of a reader and
 *     writer schema.  Returns an empty list if all reader and writers schemas are compatible.
 */
private static List<String> validateReaderWriterSchemas(
  List<Schema> readerSchemas,
  List<Schema> writerSchemas) {
 final List<String> incompatabilityMessages = Lists.newArrayList();
 for (Schema readerSchema : readerSchemas) {
  // Check that each reader schema can read records written by all writer schemas.
  final SchemaSetCompatibility compat =
    AvroUtils.checkReaderCompatibility(readerSchema, writerSchemas.iterator());
  if (compat.getType() == SchemaCompatibilityType.INCOMPATIBLE) {
   for (SchemaPairCompatibility pairCompat : compat.getCauses()) {
    if (pairCompat.getType() == SchemaCompatibilityType.INCOMPATIBLE) {
     incompatabilityMessages.add(
       String.format("Reader schema: %s is incompatible with writer schema: %s.",
       pairCompat.getReader(), pairCompat.getWriter()));
    }
   }
  }
 }
 return incompatabilityMessages;
}

/**
 * Constructs a new instance.
 *
 * @param causes identifying the compatibilities of each schema pair.
 */
public SchemaSetCompatibility(List<SchemaPairCompatibility> causes) {
 SchemaCompatibilityType isCompatible = SchemaCompatibilityType.COMPATIBLE;
 for (SchemaPairCompatibility compatibility : causes) {
  if (compatibility.getType() == SchemaCompatibilityType.INCOMPATIBLE) {
   isCompatible = SchemaCompatibilityType.INCOMPATIBLE;
   break;
  }
 }
 mType = isCompatible;
 mCauses = causes;
}