Java Reference
In-Depth Information
parse(File aFile,
DefaultHandler handler)
Parses the document in the file specified by
aFile
using
handler
as the object
containing the callback methods called by
the parser. This will throw an exception of
type
IOException
if an I/O error occurs
and of type
IllegalArgumentException
if
aFile
is
null
.
parse(String uri,
DefaultHandler handler)
Parses the document specified by
uri
using
handler
as the object defining the callback
methods. This will throw an exception of
type
SAXException
if
uri
is
null
and an
exception of type
IOException
if an I/O
error occurs.
parse(InputStream input,
DefaultHandler handler)
Parses
input
as the source of the XML
with
handler
as the event handler. This
will throw an exception of type
IOException
if an I/O error occurs, and
of type
IllegalArgumentException
if
input
is
null
.
parse(InputStream input,
DefaultHandler handler,
String systemID)
Parses input as above, but uses
systemID
to resolve any relative URIs.
parse(InputSource source,
DefaultHandler handler)
Parses the document specified by
source
using handler as the object providing the
callback methods to be called by the parser.
The
InputSource
class is defined in the
org.xml.sax
package. It defines an object that wraps a
variety of sources for an XML document that you can use to pass a document reference to a parser. You
can create an
InputSource
object from an
InputStream
object, a
Reader
object encapsulating a
character stream, or a
String
specifying a URI - either a public name or a URL. If you specify the
document source as a URL, it must be fully qualified.
Implementing a SAX Handler
As we have already seen, the
DefaultHandler
class in the
org.xml.sax.helpers
package
provides a default do-nothing implementation of each of the callback methods a SAX parser may call
when parsing a document. These methods are declared in four interfaces that are implemented by the
DefaultHandler
class:
The
ContentHandler
interface declares methods that will be called to identify the content
of a document to an application. You will usually want to implement all the methods defined
in this interface in your subclass of
DefaultHandler
.
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