/**
* @param AvroSchema $schema The rules to conform to.
* @param mixed $datum The value to validate against $schema.
* @return string|string[] An error or list of errors in the
* provided $datum. When no errors exist the empty array is
* returned.
*/
public static function getErrors(AvroSchema $schema, $datum)
{
switch ($schema->type) {
case AvroSchema::NULL_TYPE:
if (!is_null($datum)) {
return self::wrongType('null', $datum);
}
return array();
case AvroSchema::BOOLEAN_TYPE:
if (!is_bool($datum)) {
return self::wrongType('boolean', $datum);
}
return array();
case AvroSchema::STRING_TYPE:
case AvroSchema::BYTES_TYPE:
if (!is_string($datum)) {
return self::wrongType('string', $datum);
}
return array();
case AvroSchema::INT_TYPE:
if (!is_int($datum)) {
return self::wrongType('integer', $datum);
}
if (AvroSchema::INT_MIN_VALUE > $datum || $datum > AvroSchema::INT_MAX_VALUE) {
return self::outOfRange(AvroSchema::INT_MIN_VALUE, AvroSchema::INT_MAX_VALUE, $datum);
}
return array();
case AvroSchema::LONG_TYPE:
if (!is_int($datum)) {
return self::wrongType('integer', $datum);
}
if (AvroSchema::LONG_MIN_VALUE > $datum || $datum > AvroSchema::LONG_MAX_VALUE) {
return self::outOfRange(AvroSchema::LONG_MIN_VALUE, AvroSchema::LONG_MAX_VALUE, $datum);
}
return array();
case AvroSchema::FLOAT_TYPE:
case AvroSchema::DOUBLE_TYPE:
if (!is_float($datum) && !is_int($datum)) {
return self::wrongType('float or integer', $datum);
}
return array();
case AvroSchema::ARRAY_SCHEMA:
if (!is_array($datum)) {
return self::wrongType('array', $datum);
}
$errors = array();
foreach ($datum as $d) {
$result = $this->validate($schema->items(), $d);
if ($result) {
$errors[] = $result;
}
}
if ($errors) {
return $errors;
}
return array();
case AvroSchema::MAP_SCHEMA:
if (!is_array($datum)) {
return self::wrongType('array', $datum);
}
$errors = array();
foreach ($datum as $k => $v) {
if (!is_string($k)) {
$errors[] = self::wrongType('string key', $k);
}
$result = self::getErrors($schema->values(), $v);
if ($result) {
$errors[$k] = $result;
}
}
return $errors;
case AvroSchema::UNION_SCHEMA:
$errors = array();
foreach ($schema->schemas() as $schema) {
$result = self::getErrors($schema, $datum);
if (!$result) {
return array();
}
$errors[] = $result;
}
if ($errors) {
return array("Expected any one of these to be true", $errors);
}
return "No schemas provided to union";
case AvroSchema::ENUM_SCHEMA:
if (!in_array($datum, $schema->symbols())) {
$symbols = implode(', ', $schema->symbols);
return "Expected one of {$symbols} but recieved {$datum}";
}
return array();
case AvroSchema::FIXED_SCHEMA:
if (!is_string($datum)) {
return self::wrongType('string', $datum);
}
$len = strlen($datum);
if ($len !== $schema->size()) {
return "Expected string of length {$schema->size()}, " . "but recieved one of length {$len}";
}
return array();
case AvroSchema::RECORD_SCHEMA:
case AvroSchema::ERROR_SCHEMA:
case AvroSchema::REQUEST_SCHEMA:
if (!is_array($datum)) {
return self::wrongType('array', $datum);
}
$errors = array();
foreach ($schema->fields() as $field) {
$name = $field->name();
if (!array_key_exists($name, $datum)) {
$errors[$name] = 'Missing expected field';
continue;
}
$result = self::getErrors($field->type(), $datum[$name]);
if ($result) {
$errors[$name] = $result;
}
}
return $errors;
default:
return "Unknown avro schema type: {$schema->type}";
}
}
