Module java.xml

Package javax.xml.stream

Interface XMLEventReader

All Superinterfaces:

Iterator<Object>

All Known Implementing Classes:

EventReaderDelegate

public interface XMLEventReader
extends Iterator<Object>

This is the top level interface for parsing XML Events. It provides the ability to peek at the next event and returns configuration information through the property interface.

Since:

1.6

See Also:

• XMLInputFactory
• XMLEventWriter

Method Summary

Modifier and Type	Method	Description
void	close()	Frees any resources associated with this Reader.
String	getElementText()	Reads the content of a text-only element.
Object	getProperty(String name)	Get the value of a feature/property from the underlying implementation
boolean	hasNext()	Check if there are more events.
XMLEvent	nextEvent()	Gets the next XMLEvent.
XMLEvent	nextTag()	Skips any insignificant space events until a START_ELEMENT or END_ELEMENT is reached.
XMLEvent	peek()	Check the next XMLEvent without reading it from the stream.

Methods declared in interface java.util.Iterator

forEachRemaining, next, remove

Method Details

nextEvent

XMLEvent nextEvent()
            throws XMLStreamException

Gets the next XMLEvent. The initial event is StartDocument.

Returns:

the next XMLEvent

Throws:

XMLStreamException - if there is an error with the underlying XML.

NoSuchElementException - iteration has no more elements.

See Also:

• XMLEvent

hasNext

boolean hasNext()

Check if there are more events. Returns true if there are more events and false otherwise.

Specified by:

hasNext in interface Iterator<Object>

Returns:

true if the event reader has more events, false otherwise

peek

XMLEvent peek()
       throws XMLStreamException

Check the next XMLEvent without reading it from the stream. Returns null if the stream is at EOF or has no more XMLEvents. A call to peek() will be equal to the next return of next().

Returns:

the next XMLEvent

Throws:

XMLStreamException - if an error occurs

See Also:

• XMLEvent

getElementText

String getElementText()
               throws XMLStreamException

Reads the content of a text-only element. Precondition: the current event is START_ELEMENT. Postcondition: The current event is the corresponding END_ELEMENT.

Returns:

the text of the element

Throws:

XMLStreamException - if the current event is not a START_ELEMENT or if a non text element is encountered

nextTag

XMLEvent nextTag()
          throws XMLStreamException

Skips any insignificant space events until a START_ELEMENT or END_ELEMENT is reached. If anything other than space characters are encountered, an exception is thrown. This method should be used when processing element-only content because the parser is not able to recognize ignorable whitespace if the DTD is missing or not interpreted.

Returns:

a START_ELEMENT or END_ELEMENT

Throws:

XMLStreamException - if anything other than space characters are encountered

getProperty

Object getProperty(String name)
            throws IllegalArgumentException

Get the value of a feature/property from the underlying implementation

Parameters:

name - The name of the property

Returns:

The value of the property

Throws:

IllegalArgumentException - if the property is not supported

close

void close()
    throws XMLStreamException

Frees any resources associated with this Reader. This method does not close the underlying input source.

Throws:

XMLStreamException - if there are errors freeing associated resources