The Document Object Model (DOM) APIs
The DOM Packages
The Document Object Model implementation is defined in
the following packages:
| Package |
Description |
| org.w3c.dom |
This package defines the DOM programming
interfaces for XML documents, as per with the specifications defined by
the W3C. |
| javax.xml.parsers |
This package defines the DocumentBuilderFactory
class and the DocumentBuilder class. The DocumentBuilder class,
returns an object needed to implement the W3C Document interface. The factory that
creates the builder is determined by the javax.xml.parsers system
property. This package also
defines the ParserConfigurationException class to deal
with errors. |
The diagram here shows the JAXP APIs to process xml
document using the DOM parser:
javax.xml.parsers.DocumentBuilderFactory class creates
the instance of DocumentBuilder. Through DocumentBuilder it
produces a Document (a DOM) that conforms to the DOM specification. The System
property determines , the builder at the run time using
javax.xml.parsers.DocumentBuilderFactory (it selects the factory implementations
to produce the builder). The platform's default value ie..system property can be overridden from the command
line.
DocumentBuilder newDocument()
method can also be used . It creates an empty Document that implements the
org.w3c.dom.Document interface.
Alternatively, one of the builder's parse methods
can be used to create a Document from existing XML data. As a result, a DOM tree like that shown in the diagram.
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