/******************************************************************************
* Copyright (c) 2016 Oracle and Accenture
* 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
* Kamesh Sampath - [355457] Improve DTD doctype specification in XML binding
* Kamesh Sampath - [355751] General improvement of XML root binding API
******************************************************************************/
package org.eclipse.sapphire.modeling.xml;
import static org.eclipse.sapphire.modeling.xml.XmlUtil.createDefaultElementName;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import javax.xml.namespace.QName;
import org.eclipse.sapphire.Element;
import org.eclipse.sapphire.ElementType;
import org.eclipse.sapphire.LoggingService;
import org.eclipse.sapphire.Sapphire;
import org.eclipse.sapphire.modeling.CorruptedResourceException;
import org.eclipse.sapphire.modeling.ResourceStoreException;
import org.eclipse.sapphire.modeling.localization.LocalizationService;
import org.eclipse.sapphire.modeling.xml.annotations.CustomXmlRootBinding;
import org.eclipse.sapphire.modeling.xml.annotations.XmlBinding;
import org.eclipse.sapphire.modeling.xml.annotations.XmlDocumentType;
import org.eclipse.sapphire.modeling.xml.annotations.XmlSchema;
import org.eclipse.sapphire.modeling.xml.annotations.XmlSchemas;
import org.eclipse.sapphire.modeling.xml.internal.DocumentTypeRootElementController;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
/**
* @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
* @author <a href="mailto:kamesh.sampath@accenture.com">Kamesh Sampath</a>
*/
public class RootXmlResource extends XmlResource
{
private static final String PI_XML_TARGET = "xml";
private static final String PI_XML_DATA = "version=\"1.0\" encoding=\"UTF-8\"";
private final XmlResourceStore store;
private final Document document;
private RootElementController rootElementController;
private XmlElement rootXmlElement;
public RootXmlResource()
{
this( new XmlResourceStore() );
}
public RootXmlResource( final XmlResourceStore store )
{
super( null );
this.store = store;
this.document = store.getDomDocument();
}
public XmlResourceStore store()
{
return this.store;
}
@Override
public void init( final Element modelElement )
{
super.init( modelElement );
final ElementType modelElementType = modelElement.type();
final CustomXmlRootBinding customXmlRootBindingAnnotation = modelElementType.getAnnotation( CustomXmlRootBinding.class );
if( customXmlRootBindingAnnotation != null )
{
try
{
this.rootElementController = customXmlRootBindingAnnotation.value().newInstance();
}
catch( Exception e )
{
Sapphire.service( LoggingService.class ).log( e );
}
}
if( this.rootElementController == null )
{
final XmlBinding xmlBindingAnnotation = modelElementType.getAnnotation( XmlBinding.class );
if( xmlBindingAnnotation != null && xmlBindingAnnotation.path().length() != 0 )
{
final XmlPath path = new XmlPath( xmlBindingAnnotation.path(), getXmlNamespaceResolver() );
final QName qualifiedName = path.getSegment( 0 ).getQualifiedName();
final String localName = qualifiedName.getLocalPart();
final String prefix = qualifiedName.getPrefix();
final String namespace = qualifiedName.getNamespaceURI();
final XmlDocumentType xmlDocumentTypeAnnotation = modelElementType.getAnnotation( XmlDocumentType.class );
if( xmlDocumentTypeAnnotation != null && xmlDocumentTypeAnnotation.systemId().length() != 0 )
{
this.rootElementController = new DocumentTypeRootElementController( localName );
}
else
{
final Map<String,String> schemas = new HashMap<String,String>();
final XmlSchemas xmlSchemasAnnotation = modelElementType.getAnnotation( XmlSchemas.class );
if( xmlSchemasAnnotation != null )
{
for( XmlSchema xmlSchemaAnnotation : xmlSchemasAnnotation.value() )
{
final String xmlSchemaNamespace = xmlSchemaAnnotation.namespace().trim();
final String xmlSchemaLocation = xmlSchemaAnnotation.location().trim();
if( xmlSchemaNamespace.length() != 0 && xmlSchemaLocation.length() != 0 )
{
schemas.put( xmlSchemaNamespace, xmlSchemaLocation );
}
}
}
final XmlSchema xmlSchemaAnnotation = modelElementType.getAnnotation( XmlSchema.class );
if( xmlSchemaAnnotation != null )
{
final String xmlSchemaNamespace = xmlSchemaAnnotation.namespace().trim();
final String xmlSchemaLocation = xmlSchemaAnnotation.location().trim();
if( xmlSchemaNamespace.length() != 0 && xmlSchemaLocation.length() != 0 )
{
schemas.put( xmlSchemaNamespace, xmlSchemaLocation );
}
}
this.rootElementController = new StandardRootElementController( namespace, prefix, localName, schemas );
}
}
}
if( this.rootElementController == null )
{
this.rootElementController = new StandardRootElementController( createDefaultElementName( modelElementType ) );
}
this.rootElementController.init( this );
store().registerRootModelElement( modelElement );
}
public final Document getDomDocument()
{
return this.document;
}
@Override
public XmlElement getXmlElement( final boolean createIfNecessary )
{
org.w3c.dom.Element root = this.document.getDocumentElement();
if( this.document.getChildNodes().getLength() == 0 )
{
if( createIfNecessary )
{
fixMalformedDescriptor();
root = this.document.getDocumentElement();
}
}
else
{
final boolean isRootValid
= ( root == null ? false : this.rootElementController.checkRootElement() );
if( isRootValid == false )
{
root = null;
if( createIfNecessary )
{
if( validateCorruptedResourceRecovery() )
{
fixMalformedDescriptor();
root = this.document.getDocumentElement();
}
else
{
throw new CorruptedResourceException();
}
}
}
}
if( root == null )
{
this.rootXmlElement = null;
}
else if( this.rootXmlElement == null || root != this.rootXmlElement.getDomNode() )
{
this.rootXmlElement = new XmlElement( store(), root );
}
return this.rootXmlElement;
}
@Override
public void save() throws ResourceStoreException
{
if( this.document.getChildNodes().getLength() == 0 )
{
fixMalformedDescriptor();
}
this.store.save();
}
@Override
public <A> A adapt( final Class<A> adapterType )
{
A adapter = super.adapt( adapterType );
if( adapter == null )
{
adapter = this.store.adapt( adapterType );
}
return adapter;
}
@Override
public boolean isOutOfDate()
{
return this.store.isOutOfDate();
}
@Override
public void dispose()
{
super.dispose();
this.store.dispose();
}
@Override
protected LocalizationService initLocalizationService( final Locale locale )
{
return this.store.getLocalizationService( locale );
}
private final void fixMalformedDescriptor()
{
// Remove all of the existing top-level nodes. Note that we have to copy the
// items from the node list before removing any as removal seems to alter the
// node list.
final NodeList topLevelNodes = this.document.getChildNodes();
final Node[] nodes = new Node[ topLevelNodes.getLength() ];
for( int i = 0, n = nodes.length; i < n; i++ )
{
nodes[ i ] = topLevelNodes.item( i );
}
for( Node node : nodes )
{
this.document.removeChild( node );
}
// Add a new XML declaration and the root element.
if( store().isXmlDeclarationNeeded() )
{
final ProcessingInstruction xmlDeclarationNode = this.document.createProcessingInstruction( PI_XML_TARGET, PI_XML_DATA );
this.document.insertBefore( xmlDeclarationNode, null );
final Text newLineTextNode = this.document.createTextNode( "\n" );
this.document.insertBefore( newLineTextNode, null );
}
this.rootElementController.createRootElement();
}
}