/*
* Copyright (C) 2005, 2006 Joe Walnes.
* Copyright (C) 2006, 2007, 2009, 2011, 2014 XStream Committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*
* Created on 24. April 2005 by Joe Walnes
*/
package com.thoughtworks.xstream.io.xml;
import java.util.Iterator;
import com.thoughtworks.xstream.converters.ErrorWriter;
import com.thoughtworks.xstream.core.util.FastStack;
import com.thoughtworks.xstream.io.AttributeNameIterator;
import com.thoughtworks.xstream.io.naming.NameCoder;
public abstract class AbstractDocumentReader extends AbstractXmlReader implements DocumentReader {
private final FastStack<Pointer> pointers = new FastStack<Pointer>(16);
private Object current;
protected AbstractDocumentReader(final Object rootElement) {
this(rootElement, new XmlFriendlyNameCoder());
}
/**
* @since 1.4
*/
protected AbstractDocumentReader(final Object rootElement, final NameCoder nameCoder) {
super(nameCoder);
current = rootElement;
pointers.push(new Pointer());
reassignCurrentElement(current);
}
/**
* @since 1.2
* @deprecated As of 1.4, use {@link AbstractDocumentReader#AbstractDocumentReader(Object, NameCoder)} instead.
*/
@Deprecated
protected AbstractDocumentReader(final Object rootElement, final XmlFriendlyReplacer replacer) {
this(rootElement, (NameCoder)replacer);
}
protected abstract void reassignCurrentElement(Object current);
protected abstract Object getParent();
protected abstract Object getChild(int index);
protected abstract int getChildCount();
private static class Pointer {
public int v;
}
@Override
public boolean hasMoreChildren() {
final Pointer pointer = pointers.peek();
if (pointer.v < getChildCount()) {
return true;
} else {
return false;
}
}
@Override
public void moveUp() {
current = getParent();
pointers.popSilently();
reassignCurrentElement(current);
}
@Override
public void moveDown() {
final Pointer pointer = pointers.peek();
pointers.push(new Pointer());
current = getChild(pointer.v);
pointer.v++;
reassignCurrentElement(current);
}
@Override
public Iterator<String> getAttributeNames() {
return new AttributeNameIterator(this);
}
@Override
public void appendErrors(final ErrorWriter errorWriter) {
}
@Override
public Object getCurrent() {
return current;
}
@Override
public void close() {
// don't need to do anything
}
}