How to parse xCBL format file

Hi,
Is that anyone know that how to parse xCBL format in java? It would be a great help if any one can give me the examples or any information to do this.

Using the SAXParser in JAXP the parsing of the XML file is event driven.
Instantiate the parser:
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
InputSource is = new InputSource(new FileReader(theXML));call the parse method:
parser.parse(is, this);The following events are fired as the parser works through the XML public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws org.xml.sax.SAXException
public void endElement(String namespaceURI, String localName, String qName) throws org.xml.sax.SAXException
characters(char[] ch, int start, int length)etc.
You write what you want within each of these sections to handle the structure of your data. Keep in mind SAX is useful only when you know the structure of your XML.

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Hi all
Am a bit new to XML files and have no idea about SAXParsers ... Now my problem is to parse this XML file below
<?xml version="1.0" encoding="UTF-8"?>
<sc:memory_segmentation xmlns:sc="sc_memory_segmentation.xsd">
   <sc:architecture name="MPC55xx"></sc:architecture>
   <sc:derivative name=""></sc:derivative>
   <sc:configuration name=""></sc:configuration>
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               <sc:segment name="ROM page 1">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
             </sc:segment-list>
         </sc:area>
         <sc:area name="Bootloader SWE" type="BOOTLOADER">
             <sc:segment-list>
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                  <sc:end></sc:end>
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               <sc:segment name="ROM page 3">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
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            </sc:segment-list>
         </sc:area>
         <sc:area name="Application SWE 1" type="APPLICATION">
            <sc:segment-list>
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                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
               <sc:segment name="ROM page 5">
                  <sc:start></sc:start>
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               </sc:segment>
               <sc:segment name="ROM page 6">
                  <sc:start></sc:start>
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               <sc:segment name="ROM page 7">
                  <sc:start></sc:start>
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               <sc:segment name="ROM page 9">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
            </sc:segment-list>
         </sc:area>
         <sc:area name="Application SWE 4" type="APPLICATION">
            <sc:segment-list>
               <sc:segment name="ROM page 10">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
            </sc:segment-list>
         </sc:area>
      </sc:area-list>
   </sc:memory>
   <sc:memory name="Internal RAM" type="RAM">
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                  <sc:start></sc:start>
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                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
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                  <sc:start></sc:start>
                  <sc:end></sc:end>
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               <sc:segment name="RAM page 5">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
               </sc:segment>
            </sc:segment-list>
         </sc:area>
      </sc:area-list>
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               <sc:segment name="EEPROM page 2">
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                  <sc:start></sc:start>
                  <sc:end></sc:end>
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               <sc:segment name="EEPROM page 4">
                  <sc:start></sc:start>
                  <sc:end></sc:end>
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</sc:memory_segmentation> And from this file I need to make 3 Hashtables out of it one for ROM , RAM and EEPROM containg Segment information i.e. Segment start and end addresses and Area type of the segment....
If anyone could at least guide me with the basic commands and structure of the parser it would be really really great ...
Thanks a lot
Anisha

Normally if you have no idea about X, the first thing you should do is google "X tutorial". You will find plenty of them out there. And the advantage is, they are better written than whatever we spend two minutes throwing together here. Not to mention that it saves us the two minutes.
But if you have specific questions with your SAX parser when you get it going, then ask them here. Actually, ask them in the XML forum here, not this one.

How to parse a big file with Regex/Patternthan

I would parse a big file by using matcher/pattern so i have thought to use a BufferedReader.
The problem is that a BufferedReader constraints to read
the file line by line and my patterns are not only inside a line but also at the end and at the beginning of each one.
For example this class:
import java.util.regex.*;
import java.io.*;
public class Reg2 {
public static void main (String [] args) throws IOException {
    File in = new File(args[1]);
    BufferedReader get = new BufferedReader(new FileReader( in ));
    Pattern hunter = Pattern.compile(args[0]);
    String line;
    int lines = 0;
    int matches = 0;
    System.out.print("Looking for "+args[0]);
    System.out.println(" in "+args[1]);
    while ((line = get.readLine()) != null) {
      lines++;
      Matcher fit = hunter.matcher(line);
      //if (fit.matches()) {
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     matches++;
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}used with the pattern "ERTA" and this file (genomic sequence) :
AAAAAAAAAAAERTAAAAAAAAAERT [end of line]
ABBBBBBBBBBBBBBBBBBBBBBERT [end of line]
ACCCCCCCCCCCCCCCCCCCCCCERT [end of line]
returns it has found the pattern only in this line
"1: AAAAAAAAAAAERTAAAAAAAAAERT"
while my pattern is present 4 times.
Is really a good idea to use a BufferedReader ?
Has someone an idea ?
thanx
Edited by: jfact on Dec 21, 2007 4:39 PM
Edited by: jfact on Dec 21, 2007 4:43 PM

Quick and dirty demo:
import java.io.*;
import java.util.regex.*;
public class LineDemo {
    public static void main (String[] args) throws IOException {
        File in = new File("test.txt");
        BufferedReader get = new BufferedReader(new FileReader(in));
        int found = 0;
        String previous = "", next = "", lookingFor = "ERTA";
        Pattern p = Pattern.compile(lookingFor);
        while((next = get.readLine()) != null) {
            String toInspect = previous+next;
            Matcher m = p.matcher(toInspect);
            while(m.find()) found++;
            previous = next.substring(next.length()-lookingFor.length());
        System.out.println("Found '"+lookingFor+"' "+found+" times.");
/* test.txt contains these four lines:
AAAAAAAAAAAERTAAAAAAAAAERT
ABBBBBBBBBBBBBBBBBBBBBBERT
ACCCCCCCCCCCCCCCCCCCCCCERT
ACCCCCCCCCCCCCCCCCCCCCCBBB
*/

How to parse large xml file

I need to parse large xml file which contains following tag. The size of the file is upto 10MB-50MB or more.
<departments>
<department>
<a_depart id="124">
<b_depart id="Bss_253">
<bss_depart id="253">
<attributes>
<name_one>abc</name_one>
</attributes>
</bss_depart id="253">
</b_depart id="Bss_253">
</a_depart id="124">
</department>
<department>
<a_depart id="124">
<b_depart id="Bss_254">
<mss_depart id="253">
          <attributes>
          <name_one>abc</name_one>
          <name_two>xyz</name_one>
          </attributes>
     </mss_depart>
     </b_depart>
</a_depart>
</department>
<department>
<a_depart id="124">
<b_depart id="Bss_254">
<mss_depart id="255">
          <attributes>
          <name_one>abc</name_one>
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     </b_depart>
</a_depart>
</department>
<department>
<a_depart id="125">
<b_depart id="Bss_254">
<mss_depart id="253">
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     </mss_depart>
     </b_depart>
</a_depart>
</department>
I want to get the infomation for that xml file. like mss_depart id=233, building xpath dyanmically for every id and loading
that using dom4j. which is very very slow.
Is there any other solution for that to read the data using sax parser only.
I want to execute the xpath or data for the following way.
//a_depart/@id ------> all the ids of a_depart tags if it returns 3 values say 123,124,125
after that i want to execute
//a_depart[@id='123']/b_depart/@id like this ...to retrive the values of all the levels ...
     I am executing following xpath for every unique ids at all levels.
     List l = doc.selectNodes(xPathForID);
     List l1 = doc.selectNodes(xPathForAttributes+attributes.get(j)+"/text()");
But it is very slow and taking lot of time.
Is there any other way to solve this problem. If any please mail me it is urgent.
I am using jdk1.4 and jdk1.5
Is there any support for sax parser to execute xpath in jdk1.5 direclty, with out using dom4j
Thanks in advance....

I doubt you will find a preexisting solution to your problem.
SAX is usually recommended for processing big files (where "big" is undefined"). It works on big files by avoiding the messy problem of storing the data -- that is left as an exercise to you.
DOM (and its variants) works by building a Document object as the head of the tree of objects for the entire contents. With DOM, you can then use XPath, because there is something to search that is already in memory. To use XPath, you seem to have two choices, build a DOM-ish tree, or if you can find an XPath processor (I'm not sure if one exists) that can process the XML file directly, but it will be slow, since you are looking for "all" occurences of an attribute, and this means you have to read the entire file each time.
It might be worth exploring a hybrid approach -- use SAX to get some information, and build your own objects to store the data. Maybe a HashMap as the main index. But, that will keep you from using XPath, since you do not have the data structures it expects.
A third alternative would be to look at JAXB. It builds Java code from a Schema of your data and then when you import the data, it creates the necessary objects and fills in values. But, I don't think XPath woll work there either.
Dave Patterson

How to parse xCBL format file

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