/**
* @inheritdoc
*/
public function getRules()
{
$rules = new Rules();
if (!array_key_exists('rules', $this->data)) {
throw new ConfigurationException(".INI Configuration must contain 'rules' section.");
}
foreach ($this->data['rules'] as $patternStr => $probability) {
$pattern = new RulePattern((int) $probability);
$startToken = '';
foreach (explode(' ', $patternStr) as $tokenStr) {
if (strlen($tokenStr) <= 2) {
throw new ConfigurationException("Pattern {$patternStr}: Token {$tokenStr} must exceed 2 characters.");
}
$isStartToken = false;
if ($tokenStr[0] === '<' && substr($tokenStr, -1) === '>') {
$isStartToken = true;
$tokenStr = substr($tokenStr, 1, -1);
$startToken = $tokenStr;
}
$token = new RulePatternToken($tokenStr, $isStartToken);
$pattern->addToken($token);
}
if (empty($startToken)) {
throw new ConfigurationException("Pattern {$patternStr}: Must contain start token.");
}
$rule = new Rule($startToken);
$rule->addPattern($pattern);
$rules->addRule($rule);
}
return $rules;
}
/**
* @inheritdoc
*/
public function getRules()
{
$data = $this->data;
$rules = new Rules();
foreach ($data->rule as $ruleData) {
$rule = new Rule((string) $ruleData->token);
$patternIdx = 0;
foreach ($ruleData->patterns->pattern as $patternData) {
$patternName = "Pattern {$rule->getTokenName()}#{$patternIdx}";
$hasStartToken = false;
$potentialStartTokenIdxs = [];
$tokens = [];
foreach ($patternData->token as $tokenData) {
$tokenName = (string) $tokenData;
$isStartToken = (bool) $tokenData['is_start_token'];
$tokens[] = ['name' => $tokenName, 'is_start_token' => $isStartToken];
if ($isStartToken) {
if ($tokenName !== $rule->getTokenName()) {
throw new ConfigurationException("{$patternName}: Only {$rule->getTokenName()} tokens can have the 'is_start_token' attribute.");
}
if ($hasStartToken) {
throw new ConfigurationException("{$patternName}: Multiple {$rule->getTokenName()} tokens with 'is_start_token' attribute found. Only one is allowed.");
} else {
$hasStartToken = true;
}
}
if ($tokenName === $rule->getTokenName()) {
$potentialStartTokenIdxs[] = count($tokens) - 1;
}
}
if (!$hasStartToken) {
if (count($potentialStartTokenIdxs) === 0) {
throw new ConfigurationException("Pattern {$rule->getTokenName()}/#{$patternIdx} must have unambiguous start token. No {$rule->getTokenName()} token found.");
} elseif (count($potentialStartTokenIdxs) > 1) {
throw new ConfigurationException("Pattern {$rule->getTokenName()}/#{$patternIdx} must have unambiguous start token. Multiple {$rule->getTokenName()} tokens found.");
} else {
$potentialStartTokenIdx = $potentialStartTokenIdxs[0];
$tokens[$potentialStartTokenIdx]['is_start_token'] = true;
}
}
$pattern = new RulePattern((int) $patternData['probability']);
foreach ($tokens as $token) {
$pattern->addToken(new RulePatternToken($token['name'], $token['is_start_token']));
}
$rule->addPattern($pattern);
$patternIdx++;
}
$rules->addRule($rule);
}
return $rules;
}
