[jdom-interest] jaxen-jdom.jar in b10
Laurent Bihanic
laurent.bihanic at atosorigin.com
Wed May 19 03:33:38 PDT 2004
Scott Corley wrote:
> I am getting the following problem when using xpath (via jaxen) :
>
> java.lang.NoSuchMethodError: org.jdom.Element.getParent()Lorg/jdom/Element;
> at
> org.jaxen.jdom.DocumentNavigator.getParentAxisIterator(DocumentNaviga
> tor.java:252)
[...]
> I was wondering if anyone else had run into this or had a solution.
This problem comes from the introduction in JDOM b10 of the Parent interface
which changed the signature of the getParent() method : For Element, this
method now returns a Parent instead of an Element.
The only solution is to modify the JDOM DocumentNavigator of Jaxen. The
changes are not trivial since the behavior of getParent was changed too
(getParent on the root element of a document now returns the Document node
instead of null previously).
Attached is a patched DocumentNavigator class for JDOM b10 and the
corresponding jaxen-jdom.jar. This is a quick fix that needs more testing.
Try it a see if it resolves your problem.
Laurent
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/*
* $Header: /cvsroot/jaxen/jaxen/src/java/main/org/jaxen/jdom/DocumentNavigator.java,v 1.18 2002/04/26 17:17:35 jstrachan Exp $
* $Revision: 1.18 $
* $Date: 2002/04/26 17:17:35 $
*
* ====================================================================
*
* Copyright (C) 2000-2002 bob mcwhirter & James Strachan.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions, and the disclaimer that follows
* these conditions in the documentation and/or other materials
* provided with the distribution.
*
* 3. The name "Jaxen" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact license at jaxen.org.
*
* 4. Products derived from this software may not be called "Jaxen", nor
* may "Jaxen" appear in their name, without prior written permission
* from the Jaxen Project Management (pm at jaxen.org).
*
* In addition, we request (but do not require) that you include in the
* end-user documentation provided with the redistribution and/or in the
* software itself an acknowledgement equivalent to the following:
* "This product includes software developed by the
* Jaxen Project (http://www.jaxen.org/)."
* Alternatively, the acknowledgment may be graphical using the logos
* available at http://www.jaxen.org/
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* ====================================================================
* This software consists of voluntary contributions made by many
* individuals on behalf of the Jaxen Project and was originally
* created by bob mcwhirter <bob at werken.com> and
* James Strachan <jstrachan at apache.org>. For more information on the
* Jaxen Project, please see <http://www.jaxen.org/>.
*
* $Id: DocumentNavigator.java,v 1.18 2002/04/26 17:17:35 jstrachan Exp $
*/
package org.jaxen.jdom;
import org.jaxen.XPath;
import org.jaxen.DefaultNavigator;
import org.jaxen.FunctionCallException;
import org.jaxen.util.SingleObjectIterator;
import org.saxpath.SAXPathException;
import org.jdom.Parent;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Comment;
import org.jdom.Text;
import org.jdom.Attribute;
import org.jdom.CDATA;
import org.jdom.ProcessingInstruction;
import org.jdom.Namespace;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/** Interface for navigating around the EXML object model.
*
* <p>
* This class is not intended for direct usage, but is
* used by the Jaxen engine during evaluation.
* </p>
*
* @see XPath
*
* @author <a href="mailto:bob at werken.com">bob mcwhirter</a>
*/
public class DocumentNavigator extends DefaultNavigator
{
/** Singleton implementation.
*/
private static class Singleton
{
/** Singleton instance.
*/
private static DocumentNavigator instance = new DocumentNavigator();
}
public static DocumentNavigator getInstance()
{
return Singleton.instance;
}
public boolean isElement(Object obj)
{
return obj instanceof Element;
}
public boolean isComment(Object obj)
{
return obj instanceof Comment;
}
public boolean isText(Object obj)
{
return ( obj instanceof Text
||
obj instanceof CDATA );
}
public boolean isAttribute(Object obj)
{
return obj instanceof Attribute;
}
public boolean isProcessingInstruction(Object obj)
{
return obj instanceof ProcessingInstruction;
}
public boolean isDocument(Object obj)
{
return obj instanceof Document;
}
public boolean isNamespace(Object obj)
{
return obj instanceof Namespace || obj instanceof XPathNamespace;
}
public String getElementName(Object obj)
{
Element elem = (Element) obj;
return elem.getName();
}
public String getElementNamespaceUri(Object obj)
{
Element elem = (Element) obj;
String uri = elem.getNamespaceURI();
if ( uri != null && uri.length() == 0 )
return null;
else
return uri;
}
public String getAttributeName(Object obj)
{
Attribute attr = (Attribute) obj;
return attr.getName();
}
public String getAttributeNamespaceUri(Object obj)
{
Attribute attr = (Attribute) obj;
String uri = attr.getNamespaceURI();
if ( uri != null && uri.length() == 0 )
return null;
else
return uri;
}
public Iterator getChildAxisIterator(Object contextNode)
{
if ( contextNode instanceof Element )
{
return ((Element)contextNode).getContent().iterator();
}
else if ( contextNode instanceof Document )
{
return ((Document)contextNode).getContent().iterator();
}
return null;
}
public Iterator getNamespaceAxisIterator(Object contextNode)
{
if ( ! ( contextNode instanceof Element ) )
{
return null;
}
Element elem = (Element) contextNode;
Map nsMap = new HashMap();
Element current = elem;
while ( current != null ) {
Namespace ns = current.getNamespace();
if ( ns != Namespace.NO_NAMESPACE ) {
if ( !nsMap.containsKey(ns.getPrefix()) )
nsMap.put( ns.getPrefix(), new XPathNamespace(elem, ns) );
}
Iterator additional = current.getAdditionalNamespaces().iterator();
while ( additional.hasNext() ) {
ns = (Namespace)additional.next();
if ( !nsMap.containsKey(ns.getPrefix()) )
nsMap.put( ns.getPrefix(), new XPathNamespace(elem, ns) );
}
current = (Element)((current.getParent() instanceof Element)?
current.getParent(): null);
}
nsMap.put( "xml", new XPathNamespace(elem, Namespace.XML_NAMESPACE) );
return nsMap.values().iterator();
}
public Iterator getParentAxisIterator(Object contextNode)
{
Object parent = null;
if ( contextNode instanceof Document )
{
parent = contextNode;
}
else if ( contextNode instanceof Element )
{
parent = ((Element)contextNode).getParent();
}
else if ( contextNode instanceof Attribute )
{
parent = ((Attribute)contextNode).getParent();
}
else if ( contextNode instanceof XPathNamespace )
{
parent = ((XPathNamespace)contextNode).getJDOMElement();
}
else if ( contextNode instanceof ProcessingInstruction )
{
parent = ((ProcessingInstruction)contextNode).getParent();
}
else if ( contextNode instanceof Comment )
{
parent = ((Comment)contextNode).getParent();
}
else if ( contextNode instanceof Text )
{
parent = ((Text)contextNode).getParent();
}
if ( parent != null )
{
return new SingleObjectIterator( parent );
}
return null;
}
public Iterator getAttributeAxisIterator(Object contextNode)
{
if ( ! ( contextNode instanceof Element ) )
{
return null;
}
Element elem = (Element) contextNode;
return elem.getAttributes().iterator();
}
/** Returns a parsed form of the given xpath string, which will be suitable
* for queries on JDOM documents.
*/
public XPath parseXPath (String xpath) throws SAXPathException
{
return new JDOMXPath(xpath);
}
public Object getDocumentNode(Object contextNode)
{
if ( contextNode instanceof Document )
{
return contextNode;
}
Element elem = (Element) contextNode;
return elem.getDocument();
}
public String getElementQName(Object obj)
{
Element elem = (Element) obj;
String prefix = elem.getNamespacePrefix();
if ( prefix == null || "".equals( prefix ) )
{
return elem.getName();
}
return prefix + ":" + elem.getName();
}
public String getAttributeQName(Object obj)
{
Attribute attr = (Attribute) obj;
String prefix = attr.getNamespacePrefix();
if ( prefix == null || "".equals( prefix ) )
{
return attr.getName();
}
return prefix + ":" + attr.getName();
}
public String getNamespaceStringValue(Object obj)
{
if (obj instanceof Namespace) {
Namespace ns = (Namespace) obj;
return ns.getURI();
} else {
XPathNamespace ns = (XPathNamespace) obj;
return ns.getJDOMNamespace().getURI();
}
}
public String getNamespacePrefix(Object obj)
{
if (obj instanceof Namespace) {
Namespace ns = (Namespace) obj;
return ns.getPrefix();
} else {
XPathNamespace ns = (XPathNamespace) obj;
return ns.getJDOMNamespace().getPrefix();
}
}
public String getTextStringValue(Object obj)
{
if ( obj instanceof Text )
{
return ((Text)obj).getText();
}
if ( obj instanceof CDATA )
{
return ((CDATA)obj).getText();
}
return "";
}
public String getAttributeStringValue(Object obj)
{
Attribute attr = (Attribute) obj;
return attr.getValue();
}
public String getElementStringValue(Object obj)
{
Element elem = (Element) obj;
StringBuffer buf = new StringBuffer();
List content = elem.getContent();
Iterator contentIter = content.iterator();
Object each = null;
while ( contentIter.hasNext() )
{
each = contentIter.next();
if ( each instanceof Text )
{
buf.append( ((Text)each).getText() );
}
else if ( each instanceof CDATA )
{
buf.append( ((CDATA)each).getText() );
}
else if ( each instanceof Element )
{
buf.append( getElementStringValue( each ) );
}
}
return buf.toString();
}
public String getProcessingInstructionTarget(Object obj)
{
ProcessingInstruction pi = (ProcessingInstruction) obj;
return pi.getTarget();
}
public String getProcessingInstructionData(Object obj)
{
ProcessingInstruction pi = (ProcessingInstruction) obj;
return pi.getData();
}
public String getCommentStringValue(Object obj)
{
Comment cmt = (Comment) obj;
return cmt.getText();
}
public String translateNamespacePrefixToUri(String prefix, Object context)
{
Parent node = null;
if ( context instanceof Element )
{
node = (Parent) context;
}
else if ( context instanceof Text )
{
node = ((Text)context).getParent();
}
else if ( context instanceof Attribute )
{
node = ((Attribute)context).getParent();
}
else if ( context instanceof XPathNamespace )
{
node = ((XPathNamespace)context).getJDOMElement();
}
else if ( context instanceof Comment )
{
node = ((Comment)context).getParent();
}
else if ( context instanceof ProcessingInstruction )
{
node = ((ProcessingInstruction)context).getParent();
}
if ( node instanceof Element )
{
Namespace namespace = ((Element) node).getNamespace( prefix );
if ( namespace != null )
{
return namespace.getURI();
}
}
return null;
}
public Object getDocument(String url) throws FunctionCallException
{
try
{
SAXBuilder builder = new SAXBuilder();
return builder.build( url );
}
catch (Exception e)
{
throw new FunctionCallException( e.getMessage() );
}
}
}
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