What parser does JAXB use?

The program uses a content handler, MyContentHandler , to display the data passed to it by the SAX parser. Now let’s look at how you use JAXB to access an XML document such as books. xml and display its data.

Is Jaxb a parser?

JAXB is not directly comparable to DOM and SAX. The Java DOM and SAX parsing APIs are lower-level APIs to parse XML documents, while JAXB (Java API for XML Binding) is a higher-level API for converting XML elements and attributes to a Java object hierarchy (and vice versa).

What is SAX in Java?

SAX (Simple API for XML) is an event-based parser for XML documents. Unlike a DOM parser, a SAX parser creates no parse tree.

How does a SAX parser work?

Because a SAX parser usually pushes data to client applications, the whole SAX model is called a “push model.” By contrast, the XMLDOM model is called a “pull model” because it can pull out data from the source and expose it to the application. In this column, I look briefly at how a SAX parser works on XML documents.

How does JAXB work in Java?

JAXB stands for Java Architecture for XML Binding. It provides mechanism to marshal (write) java objects into XML and unmarshal (read) XML into object. Simply, you can say it is used to convert java object into xml and vice-versa.

What is DOM and SAX parser?

DOM stands for Document Object Model while SAX stands for Simple API for XML parsing. DOM parser load full XML file in-memory and creates a tree representation of XML document, while SAX is an event based XML parser and doesn’t load whole XML document into memory.

What is the advantage of SAX parser?

The general advantages of SAX include: The nature of a streaming model means that you need far less memory to process large XML documents. You do not have to process the entire document. Use callback procedures to identify and respond to only the XML elements you are interested in.

What is the importance of SAX?

In com- parison, SAX provides the document informa- tion to the application as a series of events. Therefore it is difficult for the application to handle global operations across the document. For such complex operations, the application would have to build its own data structure to store the document information.

Why do we use JAXB?

Why is JAXB used?

What is the difference between SAX parser and DOM parser?

Dom Parser − Parses an XML document by loading the complete contents of the document and creating its complete hierarchical tree in memory.

  • SAX Parser − Parses an XML document on event-based triggers.
  • JDOM Parser − Parses an XML document in a similar fashion to DOM parser but in an easier way.

    • How to convert XML to Java object using SAX parser?

    startDocument ()

  • startElement () –
  • characters () – mkyong
  • endElement () –
  • endDocument ()

    • You can process the XML document in a linear fashion from top to down.

  • The document is not deeply nested.
  • You are processing a very large XML document whose DOM tree would consume too much memory.
  • The problem to be solved involves only a part of the XML document.

    • How to get the attribute value in the SAX parser?

    Instantiate XML file:

  • Get root node: We can use getDocumentElement () to get the root node and the element of the XML file.
  • Get all nodes: On using getElementByTagName () Returns a NodeList of all the Elements in document order with a given tag name and are contained in the document.