/*
* Copyright 2005-2010 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.xml.stream;
import java.util.List;
import java.util.NoSuchElementException;
import javax.xml.stream.events.XMLEvent;
import org.springframework.util.Assert;
/**
* @author Arjen Poutsma
*/
public class ListBasedXMLEventReader extends AbstractXMLEventReader {
private final XMLEvent[] events;
private int cursor = 0;
public ListBasedXMLEventReader() {
this.events = new XMLEvent[0];
}
public ListBasedXMLEventReader(XMLEvent event) {
if (event != null) {
this.events = new XMLEvent[]{event};
}
else {
this.events = new XMLEvent[0];
}
}
public ListBasedXMLEventReader(XMLEvent... events) {
Assert.notNull(events, "'events' must not be null");
this.events = events;
}
public ListBasedXMLEventReader(List<XMLEvent> events) {
Assert.notNull(events, "'events' must not be null");
this.events = events.toArray(new XMLEvent[events.size()]);
}
public boolean hasNext() {
Assert.notNull(events, "'events' must not be null");
return cursor != events.length;
}
public XMLEvent nextEvent() {
if (cursor < events.length) {
return events[cursor++];
}
else {
throw new NoSuchElementException();
}
}
public XMLEvent peek() {
if (cursor < events.length) {
return events[cursor];
}
else {
return null;
}
}
}