6 xml parsing

XML Parsing Atul Kahate [email_address]

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object]

XML Processing ,[object Object],[object Object],[object Object],[object Object]

XML Parser ,[object Object],[object Object],[object Object],[object Object]

XML Processing Approaches ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

StAX ,[object Object],[object Object],[object Object]

XML Processing as Sequence of Events – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object]

XML Processing as Sequence of Events – 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

XML Processing as Sequence of Events – 3 ,[object Object],[object Object],[object Object]

Sequential Processing Example – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Sequential Processing Example – 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tree Processing Sequence 1 2 8 3 4 9 10 14 15 5 6 7 11 12 13 16 17

Sequential Traversal: Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP Java API for XML Processing

JAXP Concept Application program written in Java for working with XML Java API for XML Processing (JAXP) JAXP APIs Simple API for XML Processing (SAX) Document Object Model (DOM) Sequential processing Tree-based processing

JAXP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP: API or Abstraction? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP and Parsing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP API ,[object Object],[object Object],[object Object],[object Object],[object Object]

Package Details ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Which Packages to use in JAXP? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Key SAX APIs – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Key SAX APIs – 2 ,[object Object],[object Object],[object Object],[object Object]

Design Patterns Factory Pattern

“ new” means “Concrete” ,[object Object],[object Object],[object Object],[object Object]

Using “new” – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Using “new” – 2 ,[object Object],[object Object],[object Object]

What is wrong with “new”? ,[object Object],[object Object],[object Object],[object Object]

Key OO Principle ,[object Object],[object Object]

Pizza Class – Ideal Situation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ideally, we would like this to be an abstract class or an interface, but we cannot directly instantiate an abstract class or an interface!

Pizza Class – Ideal Situation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],We are left with no choice but to instantiate a concrete class

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Is this correct? ,[object Object],[object Object],[object Object]

Problems ,[object Object],[object Object],[object Object]

Problem – Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Code Modified Further ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],if (type.equals (“cheese”)) { pizza = new CheesePizza (); } else if (type.equals (“corn”)) { pizza = new CornPizza (); } else { pizza = new GeneralPizza (); } Abstract out the code that varies, and put it into a separate class, that would only worry about how to create objects. If any other object needs a pizza object, this is the class to come to.

This new Class is our “Factory” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Modified Client Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A variation of this is: PizzaFactory factory = PizzaFactory.newInstance (); In this case, newInstance () would be a static method in PizzaFactory, since we are not creating any object of PizzaFactory here

Another Factory Pattern Example

Factory Pattern – The Need – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problems Summarized ,[object Object],[object Object],[object Object]

Factory Pattern – The Need – 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

More on Factory Pattern – 1 ,[object Object],[object Object]

More on Factory Pattern – 2 ,[object Object],[object Object]

Factory Pattern – The Need – 3 ,[object Object],[object Object],[object Object]

Factory Pattern – The Need – 4 ,[object Object],[object Object],[object Object]

The Factory Class – 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Factory Class – 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Connection Classes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Client Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exercise ,[object Object],[object Object],[object Object],[object Object]

Sequential Traversal: SAX ,[object Object],[object Object],[object Object],[object Object],[object Object]

1 – Specify the Parser ,[object Object],[object Object],[object Object],[object Object],[object Object]

1 – Specify the Parser ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

2 – Create a Parser Instance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3 – Create an Event Handler ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3 – Create an Event Handler ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3 – Create an Event Handler ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

4 – Invoke the Parser ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sample XML File (emp.xml) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Java Program to Count Total Number of Elements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Count Only Book Elements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Parsing Code in JAXP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Specifying Parser Name ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exercise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exercise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP and DOM – Overview ,[object Object],[object Object],[object Object],[object Object]

JAXP and DOM – Overview ,[object Object],[object Object],[object Object]

JAXP and DOM – Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP and DOM ,[object Object],[object Object],[object Object],[object Object]

Example – XML File ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example – Java Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Check if a File is Well-Formed ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JAXP Code to Open an XML File ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Case Study – XML File ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Making Use of Node Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stream API (StAX) – Brief Overview To be covered in more depth in “Web Services”

What is StAX? ,[object Object],[object Object],[object Object],[object Object],[object Object]

StAX Classification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Applying an XSLT to an XML File Programatically ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Details about the Transformer ,[object Object],[object Object],[object Object],[object Object]

XML and ASP.NET – An Overview

XmlReader and XmlWriter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example – XML Document ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example – ASP.NET Page ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Validating an XML Against a Schema ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Creating an XML Document ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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6 xml parsing