OptionalProductionRules


1   package com.daffodilwoods.daffodildb.utils.parser;
2   
3   import com.daffodilwoods.database.utility.P;
4   import com.daffodilwoods.database.resource.DException;
5   
6   public class OptionalProductionRules extends ProductionRules{
7   
8     OptionalProductionRules(ClassLoader   classLoader0){
9       super(classLoader0);
10    }
11  
12     Object   parsePart(ParseElements pe) throws DException{
13        int position = pe.position;
14        ProductionRules object = (ProductionRules)rules[0];
15        Object   object1 = object.parse(pe);
16        if(object1 instanceof ParseException)
17           return null;
18  
19   /* Done by kaushik :: To Undo -> comment return object1 and enable all lines in dest & dend */
20   /* dest
21        if(checkLookAheadStack(pe))
22           return object1;
23        pe.position = position;
24        return null;
25     dend */
26   return object1;
27    }
28  
29     public String   toString(){
30        return nameOfRule;
31     }
32  
33  }
34

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