1 /*
  2  * XmlParser_2.java
  3  * @author Alexander Scheidl
  4  *
  5  * 
  6  *
  7  * Parser for XML Files
  8  * with the Restriction that only elementary objects are processed
  9  *
 10  */
 11 
 12 package testxml;
 13 
 14 //import java.util.Vector;  //only needed if vector is used
 15 
 16 
 17 public class XmlParser_2 {
 18     
 19     private String s = ""; // Main-XML String for Parsing
 20 
 21     private String[] tab;  // if not set null is returned, better   
 22     private int counter = 0; // Counter for the elements
 23     private int i, j; // variable for the indexOf elements
 24     private int itest; // test variable @see setelement(String) for more details
 25     
 26     /**
 27      * Creates a new instance of XmlParser_2
 28      */
 29     public XmlParser_2(String s) {
 30         this.s = s;
 31         this.tab = new String[20];
 32     }
 33     
 34     public XmlParser_2(String s, String element) {
 35         this.s = s;
 36         this.tab = new String[20];
 37         this.setElement(element);
 38     }
 39     
 40     public XmlParser_2(String s, int size) {
 41         this.s = s;
 42         this.tab = new String[size];
 43     }
 44     
 45     /**
 46      *  gives you the String within an element (Start- and Endelement)
 47      *  @return String[i] i symbolizes the position of the element
 48      */
 49     public String getString(int i){
 50         return this.tab[i];
 51         //return (String) this.v.elementAt(i);  //for vector v
 52     }
 53     
 54     /**
 55      *  gives you the number of elements
 56      *  @return int counter
 57      */
 58     public int getNumOfElements(){
 59         return this.counter;
 60     }
 61     
 62     /**
 63      *  sets an array of Strings between a given element<br><br>
 64      *
 65      *  Thist method takes use of the indexOf(Sting) method, so that means if per <br>
 66      *  example an xml tag with <v> needs to be parsed the start (i) and endposition (j) <br>
 67      *  between start and endelment <v>content</v> is returned and content is put into an <br>
 68      *  array. This operations is looped as long as an start and end element is found.
 69      *  
 70      */
 71     public void setElement(String element){
 72         boolean endreached = false; // shows you if end of xml substring in accordance with the element is reached
 73         String reduce = s;    // second variable to do not loose the main string
 74         String test="";       // temp test string
 75         String startelementn = new String();
 76         String endelementn = new String();
 77         startelementn = "<"+element+">";           // adds < and > to the startvalue of element
 78         endelementn = "</"+element+">";              // adds </ and > to the endvalue of the element
 79         
 80         
 81         while (endreached == false){   // starting a loop to get all elements
 82             if (reduce.indexOf(startelementn) != -1) { // if startelement exists
 83                 i = reduce.indexOf(startelementn) + startelementn.length(); //gives the startpoint for the Substring in the XML String
 84             } else {
 85                 i = -1;   // no startelement
 86             }
 87             
 88             j = reduce.indexOf(endelementn);  // gives the endpoint for the Substring in the XML String
 89             
 90 
 91             if (j == -1){ // j = -1, if no endelement exists
 92                 endreached = true;   //break
 93             }else{ // if an endelement exists             
 94                 if (reduce.indexOf(startelementn) > j | i == -1){ // if endelement comes before startelement or if no startelement exists
 95                     
 96                     i = reduce.indexOf(endelementn) + endelementn.length(); // i = end of endelement
 97                     reduce = reduce.substring(i); // set new reduce string from end of endelement 
 98                     i = 0; // set startingpoint to 0
 99                     if (reduce.indexOf(startelementn) != 0) { continue; } // if startelement is not at the begin go to begin of loop
100                     j = reduce.indexOf(endelementn); // gives you the endpoint of the new string
101                     
102                     if (j == -1) { continue;} // if no endelement exists, go to begin of loop
103                 }
104 
105                 test = reduce.substring(i,j); // initialize new teststring from i to j
106                 itest = test.indexOf(startelementn); // test if the teststring contains a startelement
107                 
108                 if (itest == -1){ // if teststring contains no startelement, put it into array
109                     tab[counter] = test; // puts the substring between start and endelement into an arry
110                     counter++;                              // increase number of found stings by one
111                     reduce = reduce.substring(j+endelementn.length());  // new substring of the residual elements
112                 } else { // if teststring contains a startelement
113 
114                     reduce = reduce.substring(itest+i); // set reducestring from old i + testi
115                     
116                 }
117                 
118             }
119             
120         }
121         
122     }
123     
124     
125     
126     
127     
128     
129     
130     
131     
132     
133 }
134