The code helps in parsing data prsent in a comma separated value format in a file to be uploaded in the database. It checks whether the first token of each line in the csv file is empty or not.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | public static void parsingData(String uploadFile, FileValueBinder binder) throws FileFormatException { int lineNumber = 1; String DELIM_STR = "\r\n"; StringTokenizer lineTokenizer = new StringTokenizer(uploadFile, DELIM_STR); line: while (lineTokenizer.hasMoreTokens()) { String tokenVal = lineTokenizer.nextToken(); // tokenize as CSV String nextToken = null; String prevToken = ""; int counter = 0; int parseErrorLocation = 0; ArrayList errors = new ArrayList(); ArrayList values = new ArrayList(); int indexValue=0; // returns the index value of the first comma character in the csv file indexValue=tokenVal.indexOf(","); // check if the comma char is at 0th position if(indexValue==0){ try { throw new FileFormatException(""); } catch (Exception ex) { throw new FileFormatException("Please enter a valid value at line number: "+lineNumber+ex.getMessage()); } } SampleTokenizer commaTokenizer = new SampleTokenizer(tokenVal, DELIM_CHAR); while (commaTokenizer.hasMoreTokens()) { nextToken = commaTokenizer.nextToken(); values.add(nextToken); } //pad the values if required. if (counter == (binder.getExpectedNumberOfValues() - 1)) { values.add(null); } Iterator valuesIt = values.iterator(); counter = 0; while (valuesIt.hasNext()) { String nextValue = (String) valuesIt.next(); try { binder.addNextToken(nextValue); } catch (ParseException e) { errors.add(e); parseErrorLocation = counter; err = true; } counter++; } lineNumber++; } try { binder.eof(); } catch (ParseException e) { try { //Exception } catch (Exception ex) { throw new FileFormatException(ex.getMessage()); } } } }The SampleTokenizer refers to the following: public SampleTokenizer(String str,String delim) { super(str,delim); this.string = str; this.delim= delim; isCountTokensCalled = false; tokenList = new ArrayList(); } public SampleTokenizer(String str,String delim, String escape) { super(str,delim); this.string = str; this.delim= delim; isCountTokensCalled = false; tokenList = new ArrayList(); this.ESCAPE_STR = escape; } public int countTokens() { isCountTokensCalled = true; String value=""; while (cursorPos < string.length()) { if (String.valueOf(string.charAt(cursorPos)).equals(this.ESCAPE_STR) && !isEscape) { isEscape = true; escapeStart = currentPos; } else if (String.valueOf(string.charAt(cursorPos)).equals(this.ESCAPE_STR) && isEscape) { isEscape = false; escapeEnd = currentPos; } else if (!isEscape && (String.valueOf(string.charAt(cursorPos)).equals(this.delim))) { currentPos = cursorPos; value = string.substring(previousPos,currentPos); if ("".equals(value)) value = null; tokenList.add(count,value); count++; previousPos = currentPos+this.delim.length(); } if (cursorPos == string.length()-1 && !(String.valueOf(string.charAt(cursorPos)).equals(this.delim))) { value = string.substring(previousPos); if (value.equals("")) value = null; tokenList.add(count,value); } cursorPos++; } if (string.endsWith(",")){ tokenList.add(count,null); count++; } else count++; return count; } public boolean hasMoreTokens() { if (!isCountTokensCalled) this.countTokens(); if (count > tokenPos) return true; return false; } public String nextToken() { String token = (String)tokenList.get(tokenPos); tokenPos++; return token; } |
