1: <?php
 2: 
 3: namespace BN\Compiler\Postfix\Token;
 4: 
 5: use BN\Compiler\Token\Token;
 6: use BN\Compiler\Postfix\ProcessToken;
 7: use BN\Compiler\Grammar\Operators;
 8: use BN\Compiler\Postfix\Variables;
 9: 
10: class ProcessOperator extends ProcessToken implements ProcessKeywordStrategy
11: {
12:     private $operators;
13:     private $operatorSymbol;
14:     private $processKeyword;
15: 
16:     public function __construct($accumulator, Operators $operators, Variables $variables)
17:     {
18:         $this->accumulator = $accumulator;
19:         $this->operators = $operators;
20:         $this->processKeyword = new ProcessKeyword($accumulator, $variables, $this);
21:     }
22: 
23:     public function process(Token $token)
24:     {
25:         $this->operatorSymbol = $token->value;
26:         if ($this->operators->exists($this->operatorSymbol)) {
27:             $this->processKeyword->process($token);
28:         } else {
29:             $this->accumulator->stopCalculation('unknownOperator', $this->operatorSymbol);
30:         }
31:     }
32: 
33:     public function isFirstOperandVariable()
34:     {
35:         return false;
36:     }
37: 
38:     public function getOperands()
39:     {
40:         return $this->operators->getOperands($this->operatorSymbol);
41:     }
42: 
43:     public function tokensToOperands(array $tokens)
44:     {
45:         $operands = array();
46:         foreach ($tokens as $token) {
47:             $operands[] = $token->value;
48:         }
49:         return $operands;
50:     }
51: 
52:     public function getEvaluator()
53:     {
54:         return $this->operators->getEvaluator($this->operatorSymbol);
55:     }
56: }
57: