/******************************************************************************
* Copyright (c) 2014 Oracle
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Konstantin Komissarchik - initial implementation and ongoing maintenance
******************************************************************************/
package org.eclipse.sapphire.modeling.xml;
import org.eclipse.sapphire.Property;
import org.eclipse.sapphire.modeling.xml.XmlNode.Event;
import org.eclipse.sapphire.modeling.xml.XmlNode.EventType;
import org.eclipse.sapphire.modeling.xml.annotations.CustomXmlValueBinding;
/**
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
*/
public final class FoldingXmlValueBindingImpl extends XmlValueBindingImpl
{
private String elementName;
private XmlElement.Listener listener;
@Override
public void init( final Property property )
{
super.init( property );
final XmlElement root = xml();
this.elementName = property.definition().getAnnotation( CustomXmlValueBinding.class ).params()[ 0 ];
final String finalElementName = this.elementName;
this.listener = new XmlElement.Listener()
{
@Override
public void handle( final Event event )
{
final EventType type = event.getType();
if( type == EventType.PRE_CHILD_ELEMENT_ADD )
{
XmlElement propElement = root.getChildElement( finalElementName, false );
if( propElement == null )
{
final String propName = root.getText().trim();
if( propName.length() > 0 )
{
root.setText( null );
propElement = root.getChildElement( finalElementName, true );
propElement.setText( propName );
}
}
}
else if( type == EventType.POST_CHILD_ELEMENT_REMOVE )
{
final int childElementsCount = root.getChildElements().size();
if( childElementsCount == 1 )
{
final XmlElement propElement = root.getChildElement( finalElementName, false );
if( propElement != null )
{
final String propName = propElement.getText().trim();
propElement.remove();
if( propName.length() > 0 )
{
root.setText( propName );
}
}
}
}
}
};
root.addListener( this.listener );
}
@Override
public String read()
{
String value = null;
final XmlElement el = xml( false );
if( el != null )
{
final XmlElement propElement = el.getChildElement( this.elementName, false );
if( propElement != null )
{
value = propElement.getText();
}
else
{
value = el.getText();
}
}
return value;
}
@Override
public void write( final String value )
{
final XmlElement el = xml( true );
boolean foundChildContent = false;
for( final XmlElement child : el.getChildElements() )
{
if( ! child.getLocalName().equals( this.elementName ) )
{
foundChildContent = true;
break;
}
}
if( foundChildContent )
{
el.setChildNodeText( this.elementName, value, true );
}
else
{
el.setText( value );
}
}
@Override
public void dispose()
{
super.dispose();
xml().removeListener( this.listener );
}
}