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/*******************************************************************************
* Copyright (c) 2001, 2005 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.ws.internal.parser.disco;
import java.util.Vector;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
/**
* See http://msdn.microsoft.com/msdnmag/issues/02/02/xml/default.aspx for more
* details on DISCO.
*/
public class DISCOParser
{
private DocumentBuilder parser_;
private final String NS_DISCO = "http://schemas.xmlsoap.org/disco/";
private final String DISCOVERY = "discovery";
private final String DISCOVERY_REF = "discoveryRef";
private final String NS_CONTRACT_REF = "http://schemas.xmlsoap.org/disco/scl/";
private final String CONTRACT_REF = "contractRef";
private final String REF = "ref";
private final String DOC_REF = "docRef";
public DISCOParser()
{
try
{
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
docBuilderFactory.setNamespaceAware(true);
parser_ = docBuilderFactory.newDocumentBuilder();
}
catch (ParserConfigurationException pce)
{
parser_ = null;
}
}
public DISCOReference[] parse(String discoURI, InputSource source) throws Exception
{
if (parser_ != null)
{
Document doc = parser_.parse(source);
Element rootElement = doc.getDocumentElement();
// Root element must by <disco:discovery
// xmlns:disco="http://schemas.xmlsoap.org/disco/">
if (rootElement != null && rootElement.getNamespaceURI().equals(NS_DISCO) && rootElement.getLocalName().equals(DISCOVERY))
{
NodeList childNodes = rootElement.getChildNodes();
Vector discoReferences = new Vector();
for (int i = 0; i < childNodes.getLength(); i++)
{
Node childNode = childNodes.item(i);
if (childNode instanceof Element)
{
Element element = (Element)childNode;
String localName = element.getLocalName();
String nsURI = element.getNamespaceURI();
if (nsURI.equals(NS_DISCO) && localName.equals(DISCOVERY_REF))
{
// DISCO link.
String ref = convertToAbsoluteURI(discoURI, element.getAttribute(REF));
discoReferences.addElement(new DISCOReference(ref));
}
else if (nsURI.equals(NS_CONTRACT_REF) && localName.equals(CONTRACT_REF))
{
// WSDL link.
String ref = convertToAbsoluteURI(discoURI, element.getAttribute(REF));
String docRef = convertToAbsoluteURI(discoURI, element.getAttribute(DOC_REF));
discoReferences.addElement(new DISCOContractReference(ref, docRef));
}
}
}
int numberOfDISCOReferences = discoReferences.size();
if (numberOfDISCOReferences > 0)
{
DISCOReference[] references = new DISCOReference[numberOfDISCOReferences];
discoReferences.copyInto(references);
return references;
}
}
else
{
// The document is not a valid DISCO document.
throw new Exception();
}
}
return null;
}
private String convertToAbsoluteURI(String discoURI, String refURI)
{
if (refURI != null)
{
if (refURI.indexOf("://") > -1)
{
// refURI is already absolute.
return refURI;
}
else
{
StringBuffer absoluteURI = new StringBuffer(discoURI.substring(0, Math.max(discoURI.lastIndexOf('\\'), discoURI.lastIndexOf('/') + 1)));
absoluteURI.append(refURI);
return absoluteURI.toString();
}
}
return null;
}
}
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