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javax.xml.stream.util
Class EventReaderDelegate

java.lang.Object
  extended by javax.xml.stream.util.EventReaderDelegate
All Implemented Interfaces:
Iterator, XMLEventReader

public class EventReaderDelegate
extends Object
implements XMLEventReader

This is the base class for deriving an XMLEventReader filter. This class is designed to sit between an XMLEventReader and an application's XMLEventReader. By default each method does nothing but call the corresponding method on the parent interface.

Since:
1.6
See Also:
XMLEventReader, StreamReaderDelegate

Constructor Summary
EventReaderDelegate()
          Construct an empty filter with no parent.
EventReaderDelegate(XMLEventReader reader)
          Construct an filter with the specified parent.
 
Method Summary
 void close()
          Frees any resources associated with this Reader.
 String getElementText()
          Reads the content of a text-only element.
 XMLEventReader getParent()
          Get the parent of this instance.
 Object getProperty(String name)
          Get the value of a feature/property from the underlying implementation
 boolean hasNext()
          Check if there are more events.
 Object next()
          Returns the next element in the iteration.
 XMLEvent nextEvent()
          Get 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.
 void remove()
          Removes from the underlying collection the last element returned by this iterator (optional operation).
 void setParent(XMLEventReader reader)
          Set the parent of this instance.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

EventReaderDelegate

public EventReaderDelegate()
Construct an empty filter with no parent.


EventReaderDelegate

public EventReaderDelegate(XMLEventReader reader)
Construct an filter with the specified parent.

Parameters:
reader - the parent
Method Detail

setParent

public void setParent(XMLEventReader reader)
Set the parent of this instance.

Parameters:
reader - the new parent

getParent

public XMLEventReader getParent()
Get the parent of this instance.

Returns:
the parent or null if none is set

nextEvent

public XMLEvent nextEvent()
                   throws XMLStreamException
Description copied from interface: XMLEventReader
Get the next XMLEvent

Specified by:
nextEvent in interface XMLEventReader
Throws:
XMLStreamException - if there is an error with the underlying XML.
See Also:
XMLEvent

next

public Object next()
Description copied from interface: Iterator
Returns the next element in the iteration.

Specified by:
next in interface Iterator
Returns:
the next element in the iteration

hasNext

public boolean hasNext()
Description copied from interface: XMLEventReader
Check if there are more events. Returns true if there are more events and false otherwise.

Specified by:
hasNext in interface Iterator
Specified by:
hasNext in interface XMLEventReader
Returns:
true if the event reader has more events, false otherwise

peek

public XMLEvent peek()
              throws XMLStreamException
Description copied from interface: XMLEventReader
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().

Specified by:
peek in interface XMLEventReader
Throws:
XMLStreamException
See Also:
XMLEvent

close

public void close()
           throws XMLStreamException
Description copied from interface: XMLEventReader
Frees any resources associated with this Reader. This method does not close the underlying input source.

Specified by:
close in interface XMLEventReader
Throws:
XMLStreamException - if there are errors freeing associated resources

getElementText

public String getElementText()
                      throws XMLStreamException
Description copied from interface: XMLEventReader
Reads the content of a text-only element. Precondition: the current event is START_ELEMENT. Postcondition: The current event is the corresponding END_ELEMENT.

Specified by:
getElementText in interface XMLEventReader
Throws:
XMLStreamException - if the current event is not a START_ELEMENT or if a non text element is encountered

nextTag

public XMLEvent nextTag()
                 throws XMLStreamException
Description copied from interface: XMLEventReader
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.

Specified by:
nextTag in interface XMLEventReader
Throws:
XMLStreamException - if anything other than space characters are encountered

getProperty

public Object getProperty(String name)
                   throws IllegalArgumentException
Description copied from interface: XMLEventReader
Get the value of a feature/property from the underlying implementation

Specified by:
getProperty in interface XMLEventReader
Parameters:
name - The name of the property
Returns:
The value of the property
Throws:
IllegalArgumentException - if the property is not supported

remove

public void remove()
Description copied from interface: Iterator
Removes from the underlying collection the last element returned by this iterator (optional operation). This method can be called only once per call to Iterator.next(). The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method.

Specified by:
remove in interface Iterator

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