/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
*/
package javax.xml.stream;
import javax.xml.stream.events.XMLEvent;
import java.util.Iterator;
/**
*
* 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.
*
* @version 1.0
* @author Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
* @see XMLInputFactory
* @see XMLEventWriter
* @since 1.6
*/
public interface XMLEventReader extends Iterator {
/**
* Gets the next XMLEvent. The initial event is
* {@link javax.xml.stream.events.StartDocument StartDocument}.
*
* @return the next XMLEvent
* @see XMLEvent
* @throws XMLStreamException if there is an error with the underlying XML.
* @throws java.util.NoSuchElementException iteration has no more elements.
*/
public XMLEvent nextEvent() throws XMLStreamException;
/**
* Check if there are more events.
* Returns true if there are more events and false otherwise.
* @return true if the event reader has more events, false otherwise
*/
@Override
public boolean hasNext();
/**
* 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().
*
* @return the next XMLEvent
* @see XMLEvent
* @throws XMLStreamException
*/
public XMLEvent peek() 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.
*
* @return the text of the element
* @throws XMLStreamException if the current event is not a START_ELEMENT
* or if a non text element is encountered
*/
public String getElementText() 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.
*
* @return a START_ELEMENT or END_ELEMENT
* @throws XMLStreamException if anything other than space characters are encountered
*/
public XMLEvent nextTag() throws XMLStreamException;
/**
* Get the value of a feature/property from the underlying implementation
* @param name The name of the property
* @return The value of the property
* @throws IllegalArgumentException if the property is not supported
*/
public Object getProperty(java.lang.String name) throws java.lang.IllegalArgumentException;
/**
* 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
*/
public void close() throws XMLStreamException;
}