Examples of org.jaxen.Context

org.jaxen.Context
Wrapper around implementation-specific objects used as the context of an expression evaluation.
NOTE: This class is not typically used directly, but is exposed for writers of implementation-specific XPath packages.

The Context bundles utilities together for evaluation of the expression. It wraps the provided objects for ease-of-passage through the expression AST.
@see ContextSupport @see BaseXPath @see org.jaxen.dom4j.Dom4jXPath XPath for dom4j @see org.jaxen.jdom.JDOMXPath XPath for JDOM @see org.jaxen.dom.DOMXPath XPath for W3C DOM @see org.jaxen.exml.ElectricXPath XPath for Electric XML @author bob mcwhirter


        public List selectNodes(Object object, NamespaceContext namespaces)
        throws
            TemplateModelException
        {
            Context context = getContext(object);
            context.getContextSupport().setNamespaceContext(namespaces);
            try {
                return selectNodesForContext(context);
            }
            catch(Exception e) {
                throw new TemplateModelException(e);

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        public List selectNodes(Object object, NamespaceContext namespaces)
        throws
            TemplateModelException
        {
            Context context = getContext(object);
            context.getContextSupport().setNamespaceContext(namespaces);
            try {
                return selectNodesForContext(context);
            }
            catch(Exception e) {
                throw new TemplateModelException(e);

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        public List selectNodes(Object object, NamespaceContext namespaces)
        throws
            TemplateModelException
        {
            Context context = getContext(object);
            context.getContextSupport().setNamespaceContext(namespaces);
            try {
                return selectNodesForContext(context);
            }
            catch(Exception e) {
                throw new TemplateModelException(e);

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        public List selectNodes(Object object, Map namespaces)
        throws
            JaxenException
        {
            Context context = getContext(object);
            context.getContextSupport().setNamespaceContext(new NamespaceContextImpl(namespaces));
            return selectNodesForContext(context);
        }

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    public Object evaluate(Context context) throws JaxenException
    {
        ContextSupport support = context.getContextSupport();
        Navigator      nav     = support.getNavigator();


        Context absContext = new Context( support );


        
        List contextNodes = context.getNodeSet();


        if ( contextNodes.isEmpty() )
        {
            return Collections.EMPTY_LIST;
        }


        Object firstNode = contextNodes.get( 0 );


        Object docNode   = nav.getDocumentNode( firstNode );


        if ( docNode == null )
        {
            return Collections.EMPTY_LIST;
        }


        List list = new ArrayList(1);


        list.add( docNode );


        absContext.setNodeSet( list );


        return super.evaluate( absContext );
    }

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        Predicate eachPred    = null;
        Object    contextNode = null;


        Object predResult  = null;
        Context predContext = new Context( support );


  // Filter the 'filterSet' against all predicates. This has been
  // tuned for performance, so there are two separate loops


  // In the first run, all nodes matching the first predicate will
  // be copied from contextNodeSet to newNodeSet


  // In the second loop, newNodeSet is filtered progressively against
  // the remaining predicates, eliminating any non-matching nodes


  if ( predIter.hasNext() )
        {
            eachPred = (Predicate) predIter.next();


            int filterSize = filterSet.size();


            for ( int i = 0 ; i < filterSize ; ++i )
            {
                contextNode = filterSet.get( i );


                List list = new ArrayList( 1 );


                list.add( contextNode );


                predContext.setNodeSet( list );


                predContext.setPosition( i + 1 );
                predContext.setSize( filterSize );


                predResult = eachPred.evaluate( predContext );


                if ( predResult instanceof Number )
                {
                    int proximity = ((Number)predResult).intValue();


                    if ( proximity == ( i + 1 ) )
                    {
                        newNodeSet.add( contextNode );
                    }
                }
                else
                {
                    Boolean includes = BooleanFunction.evaluate( predResult, predContext.getNavigator() );


                    if ( includes.booleanValue() )
                    {
                        newNodeSet.add( contextNode );
                    }
                }
            }
        }




  // This will be true if any filtering takes place from here on


  boolean nodesFiltered = false;


  // Second loop: Filter filterSet until no more predicates are left


  filterSet = newNodeSet;


  while ( predIter.hasNext() )
        {
            eachPred = (Predicate) predIter.next();




      int filterSize = filterSet.size();


            for ( int i = 0 ; i < filterSize ; ++i )
            {
                contextNode = filterSet.get(i);


    // Check if a node has been eliminated already


    if (contextNode == null) continue;


                List list = new ArrayList( 1 );


                list.add( contextNode );


                predContext.setNodeSet( list );


                predContext.setPosition( i + 1 );
                predContext.setSize( filterSize );


                predResult = eachPred.evaluate( predContext );


                if ( predResult instanceof Number )
                {
                    int proximity = ((Number)predResult).intValue();


                    if ( proximity != ( i + 1 ) )
                    {
                        filterSet.set(i,null);
      nodesFiltered = true;
                    }
                }
                else
                {
                    Boolean includes = BooleanFunction.evaluate( predResult, predContext.getNavigator() );


                    if ( !includes.booleanValue() )
                    {
                        filterSet.set(i,null);
      nodesFiltered = true;

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    }


    public List evaluate(OExpression cexp, EvaluationContext ctx) throws FaultException, EvaluationException {
        try {
            XPath compiledXPath = compile((OXPath10Expression) cexp);
            Context context = createContext((OXPath10Expression) cexp, ctx);


            List retVal = compiledXPath.selectNodes(context);


            if ((retVal.size() == 1) && !(retVal.get(0) instanceof Node)) {
                Document d = DOMUtils.newDocument();

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    private Context createContext(OXPath10Expression oxpath, EvaluationContext ctx) {
        JaxenContexts bpelSupport = new JaxenContexts(oxpath, _extensionFunctions, ctx);
        ContextSupport support = new ContextSupport(new JaxenNamespaceContextAdapter(oxpath.namespaceCtx), bpelSupport,
                bpelSupport, new BpelDocumentNavigator(ctx.getRootNode()));
        Context jctx = new Context(support);


        if (ctx.getRootNode() != null)
            jctx.setNodeSet(Collections.singletonList(ctx.getRootNode()));


        return jctx;
    }

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                "      ## SKIPPED -- Unsupported Axis ");
        }
    }


    protected Context getContext(Object contextNode) {
        Context context = new Context(getContextSupport());
        List list = new ArrayList(1);
        list.add(contextNode);
        context.setNodeSet(list);
        return context;
    }

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        }
    }


    protected Context getContext(Object contextNode)
    {
        Context context = new Context(getContextSupport());
        List list = new ArrayList(1);
        list.add(contextNode);
        context.setNodeSet(list);
        return context;
    }

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freemarker.ext.xml._Dom4jNavigator$Dom4jXPathEx

freemarker.ext.xml._DomNavigator$DomXPathEx

freemarker.ext.xml._JdomNavigator$JDOMXPathEx

freemarker.ext.xml.Dom4jNavigator$Dom4jXPathEx

freemarker.ext.xml.DomNavigator$DomXPathEx

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org.apache.axiom.xpath.XPathTestBase

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