/**
* $Id: mxRootChangeCodec.java,v 1.2 2010-11-04 23:11:40 david Exp $
* Copyright (c) 2006-2010, Gaudenz Alder, David Benson
*/
package com.mxgraph.io;
import java.util.Map;
import org.w3c.dom.Node;
import com.mxgraph.model.mxGraphModel.mxRootChange;
import com.mxgraph.model.mxICell;
/**
* Codec for mxChildChanges. This class is created and registered
* dynamically at load time and used implicitly via mxCodec
* and the mxCodecRegistry.
*/
public class mxRootChangeCodec extends mxObjectCodec
{
/**
* Constructs a new model codec.
*/
public mxRootChangeCodec()
{
this(new mxRootChange(), new String[] { "model", "previous", "root" },
null, null);
}
/**
* Constructs a new model codec for the given arguments.
*/
public mxRootChangeCodec(Object template, String[] exclude,
String[] idrefs, Map<String, String> mapping)
{
super(template, exclude, idrefs, mapping);
}
/* (non-Javadoc)
* @see com.mxgraph.io.mxObjectCodec#afterEncode(com.mxgraph.io.mxCodec, java.lang.Object, org.w3c.dom.Node)
*/
@Override
public Node afterEncode(mxCodec enc, Object obj, Node node)
{
if (obj instanceof mxRootChange)
{
enc.encodeCell((mxICell) ((mxRootChange) obj).getRoot(), node, true);
}
return node;
}
/**
* Reads the cells into the graph model. All cells are children of the root
* element in the node.
*/
public Node beforeDecode(mxCodec dec, Node node, Object into)
{
if (into instanceof mxRootChange)
{
mxRootChange change = (mxRootChange) into;
if (node.getFirstChild() != null
&& node.getFirstChild().getNodeType() == Node.ELEMENT_NODE)
{
// Makes sure the original node isn't modified
node = node.cloneNode(true);
Node tmp = node.getFirstChild();
change.setRoot(dec.decodeCell(tmp, false));
Node tmp2 = tmp.getNextSibling();
tmp.getParentNode().removeChild(tmp);
tmp = tmp2;
while (tmp != null)
{
tmp2 = tmp.getNextSibling();
if (tmp.getNodeType() == Node.ELEMENT_NODE)
{
dec.decodeCell(tmp, true);
}
tmp.getParentNode().removeChild(tmp);
tmp = tmp2;
}
}
}
return node;
}
/* (non-Javadoc)
* @see com.mxgraph.io.mxObjectCodec#afterDecode(com.mxgraph.io.mxCodec, org.w3c.dom.Node, java.lang.Object)
*/
@Override
public Object afterDecode(mxCodec dec, Node node, Object obj)
{
if (obj instanceof mxRootChange)
{
mxRootChange change = (mxRootChange) obj;
change.setPrevious(change.getRoot());
}
return obj;
}
}