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1 package com.daffodilwoods.daffodildb.utils.parser;
2
3 import java.lang.reflect.Field  ;
4 import com.daffodilwoods.database.resource.DException;
5 import com.daffodilwoods.database.resource.DRuntimeException;
6
7 public class BinaryStringLiteralProductionRules extends ProductionRules{
8
9 public static final int BINARYSTRINGTYPE = 1;
10 public static final int BITSTRINGTYPE = 2;
11 public static final int HEXSTRINGTYPE = 3;
12 int typeOfField ;
13
14 BinaryStringLiteralProductionRules(ClassLoader classLoader0) {
15 super(classLoader0);
16 ruleKey = nameOfRule;
17 typeOfField = -1;
18 }
19
20 void setClassName(int type){
21 typeOfField = type;
22 switch(type){
23 case BINARYSTRINGTYPE :
24 className = "binarystringliteral";
25 break;
26 case BITSTRINGTYPE :
27 className = "bitstringliteralrepresentation";
28 break;
29 case HEXSTRINGTYPE :
30 className = "hexitstringliteralrepresentation";
31 break;
32 default :
33 throw new DRuntimeException("DSE0",new Object []{"Invalid Type for this Object"});
34 }
35 }
36
37 Object parsePart(ParseElements pe) throws DException{
38 if(typeOfField == -1)
39 throw new DException("DSE0",new Object []{"Type of rule is not set. First set the Type"});
40 int position = pe.position;
41 char[] val = pe.queryArray;
42 int length = val.length;
43 char c = '\'';
44
45
46 while(position < pe.queryArray.length && Character.isWhitespace(val[position]))
47 position++;
48
49 if(position == pe.queryArray.length || val[position] != c){
50 return pe.parseException;
51 }
52 position++;
53 return typeOfField == BITSTRINGTYPE ?
54 parsePartBitType(pe,position,length,val,c) :
55 parsePartHexitType(pe,position,length,val,c);
56 }
57
58 private Object parsePartBitType(ParseElements pe,int position,int length,char[] val,char c){
59 StringBuffer stbfr = new StringBuffer ();
60 while(position < length){
61 if(val[position] == c){
62 position++;
63 pe.position = position;
64 String sa = stbfr.toString();
65 return sa;
66 }
67 int a = (int)val[position];
68 if(a == 48 || a == 49){
69 stbfr.append(val[position]);
70 position++;
71 }else{
72 return pe.parseException;
73 }
74 }
75 return pe.parseException;
76 }
77
78 private Object parsePartHexitType(ParseElements pe,int position,int length,char[] val,char c){
79 StringBuffer stbfr = new StringBuffer ();
80 while(position < length){
81 if(val[position] == c){
82 position++;
83 pe.position = position;
84 String sa = stbfr.toString();
85 return sa;
86 }
87 if(Character.isDigit(val[position]) || checkHex(val[position])){
88 stbfr.append(val[position]);
89 position++;
90 }else{
91 return pe.parseException;
92 }
93 }
94 return pe.parseException;
95 }
96
97 private boolean checkHex(char c){
98 int a = (int)c;
99 return (a > 64 && a < 71) || (a > 96 && a < 103);
100 }
101 }
102 |
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