Parsers

[Former Member]

What is DOM and SAX Parser. Advantages and Disadvantages?????

Ruchitha

[Former Member · Accepted solution]

Hi ruchitha thakur ,

These r all the details regarding DOM & SAX & their advantages & disadvantages:

Java Mapping using DOM Parser

In Java Mapping, we ourselves have to write the code to manipulate the incoming xml messages, parse it and to create the outbound xml message. while generating XML is a straightforward procedure, the inverse operation, using XML data from within a program, is not. To our assistance, there are some java based xml parsers available which will ease the task of xml manipulation.

There are mainly two popular XML parsing standards.

SAX API

DOM API

DOM:

XML parsers that implement DOM create a tree in memory that represents the contents of the XML document.

Drawbacks:

Huge Memory:

It loads the entire XML document into memory. For large documents, this becomes a problem. Again, since the DOM is implemented as many tiny objects, the memory footprint is even larger than the XML document itself because the JVM stores a few extra bytes of information regarding all of these objects, as well as the contents of the XML document.

Processor Intensive:

Another subtle issue for the DOM API is that code written for it must scan the XML document twice. The first pass creates the DOM structure in memory, the second locates all XML data the program is interested in.

Coming to DOM standard, there are several implementations available by different vendors.

The following web-sites give u all information about DOM & SAX:

Document Object Model (DOM)(In this web-site u wil get all details about DOM)

http://www.w3.org/DOM/

Simple API for XML(In this web-site u wil get all details about SAX)

http://sax.sourceforge.net/

Java Mapping using DOM Parser

https://www.sdn.sap.com/irj/sdn/wiki?path=/display/xi/main&;

Java Mapping Sample Code

https://www.sdn.sap.com/irj/sdn/wiki?path=/display/xi/main&;

http://www.sap-hefte.de/download/dateien/1241/140_leseprobe.pdf

cheers!

gyanaraj

*****Pls reward points if u find this informative

[Former Member]

hi ruchitha,

you can find all about DOM and SAX Parsers in the following links

http://www.w3schools.com

[Former Member]

Ruchita,

Google engine can easily give u the answer of such queations:)

Regards

Farooq

[Former Member]

<b>What is DOM and SAX Parser</b>

these are the 2 parsers JAVA uses for parsing the messages.

see here...

For a tutorial on the methods of SAX and DOM http://java.sun.com/webservices/docs/1.1/tutorial/doc/

http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html

tutorial sax and dom

/people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs

SAX AND dom PARSER ( BY thorsten)

/people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs

see here the code for JAVA mapping

Refer these links...

http://help.sap.com/saphelp_nw04/helpdata/en/e2/e13fcd80fe47768df001a558ed10b6/content.htm

/people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs

/people/swaroopa.vishwanath/blog/2005/06/29/generic-approach-for-validating-incoming-flat-file-in-sap-xi--part-ii

regards

biplab

[Former Member]

Ruchita,

Before you post any further threads, read the Rules of Engagement.

All your questions can be found using a simple search. Refrain from spamming the forums.

Regards,

Jai Shankar

[Former Member]

HI '

these parsers are the part of xi.

regards,

KRUSHI