Package net.sf.saxon.expr

Examples of net.sf.saxon.expr.Expression

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     */

    public Expression bind(StructuredQName functionName, Expression[] staticArgs, StaticContext env) throws XPathException {
        final String uri = functionName.getNamespaceURI();
        if (namespaces.contains(uri)) {
            Expression call = baseLibrary.bind(functionName, staticArgs, env);
            if (call != null) {
                // Check that the result type and all the argument types are in the static context of the
                // calling module
                XQueryFunction def = baseLibrary.getDeclaration(functionName, staticArgs);
                importingModule.checkImportedFunctionSignature(def);
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    }

    private SequenceIterator rawIterator(XPathContextMajor context) throws XPathException {
        SequenceIterator iterator = expression.iterate(context);
        if (sortKey != null) {
            Expression key = sortKey.expression;
            if (key.getItemType(config.getTypeHierarchy()) instanceof NodeTest) {
                sortKey.expression = new Atomizer(key, config);
            }

            SortKeyDefinition sk = new SortKeyDefinition();
            sk.setSortKey(sortKey.expression);
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    public Expression bind(StructuredQName functionName, Expression[] staticArgs, StaticContext env)
            throws XPathException {
        for (Iterator it=libraryList.iterator(); it.hasNext();) {
            FunctionLibrary lib = (FunctionLibrary)it.next();
            Expression func = lib.bind(functionName, staticArgs, env);
            if (func != null) {
                return func;
            }
        }
        return null;
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     * @return a Procedure object representing the compiled attribute set
     * @throws XPathException if a failure is detected
     */
    public Expression compile(Executable exec) throws XPathException {
        if (referenceCount > 0 ) {
            Expression body = compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
            if (body == null) {
                body = Literal.makeEmptySequence();
            }

            try {

                ExpressionVisitor visitor = makeExpressionVisitor();
                body = visitor.simplify(body);
                if (getConfiguration().isCompileWithTracing()) {
                    TraceWrapper trace = new TraceInstruction(body, this);
                    trace.setLocationId(allocateLocationId(getSystemId(), getLineNumber()));
                    trace.setContainer(procedure);
                    body = trace;
                }

                procedure.setUseAttributeSets(useAttributeSets);
                procedure.setName(getObjectName());
                procedure.setBody(body);
                procedure.setSystemId(getSystemId());
                procedure.setLineNumber(getLineNumber());
                procedure.setExecutable(exec);

                Expression exp2 = body.optimize(visitor, AnyItemType.getInstance());
                if (body != exp2) {
                    procedure.setBody(exp2);
                    body = exp2;
                }

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    public XPathExpressionImpl createExpression(String expression) throws net.sf.saxon.trans.XPathException {
        return createExpressionInternal(expression);
    }

    private XPathExpressionImpl createExpressionInternal(String expression) throws net.sf.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext, 0, -1, 1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        exp.setContainer(staticContext);
        XPathExpressionImpl xpe = new XPathExpressionImpl(exp, getExecutable());
        xpe.setStackFrameMap(map);
        if (contextNode != null) {
            xpe.privatelySetContextNode(contextNode);
        }
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     * </ul>
     * @deprecated since Saxon 8.9 - use the various method defined in the JAXP interface definition
    */

    public List evaluate(String expression) throws net.sf.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext,0,-1,1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        ArrayList list = new ArrayList(20);
        while (true) {
            Item item = iterator.next();
            if (item == null) {
                return list;
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    * the evaluate() method
     * @deprecated since Saxon 8.9 - use the methods defined in the JAXP interface
    */

    public Object evaluateSingle(String expression) throws net.sf.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext,0,-1,1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        Item item = iterator.next();
        if (item == null) {
            return null;
        } else {
            return Value.convertToJava(item);
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                TinyBuilder result = new TinyBuilder();
                factory.newTransformer().transform(source, result);
                contextNode = (Node)result.getCurrentDocument();
            }

            Expression expression = ExpressionTool.make(
                    str, new Saxon7Context((NodeInfo)contextNode, resolver), 0, -1);
            XPathContext context = new XPathContext((NodeInfo)contextNode);
            return expression.iterate(context);
        }
        catch (final Exception e)
        {
            if (getLogger().isDebugEnabled()) {
                getLogger().debug("Failed to evaluate '" + str + "'", e);
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        if ((contextNode == null) || !(contextNode instanceof Element) ||
                !(xpathExpr instanceof XPathExpressionImpl)) {
            return;
        }

        Expression expression = ((XPathExpressionImpl) xpathExpr).getInternalExpression();
        Iterator<Expression> subExpressions = (Iterator<Expression>) expression.iterateSubExpressions();

        if (!subExpressions.hasNext()) {
            return;
        }

        Expression subExpr = (Expression) subExpressions.next();

        if (!(subExpr instanceof PathExpression)) {
            return;
        }

        Document document = contextNode.getOwnerDocument();
        PathExpression pathExpr = (PathExpression) subExpr;
        Expression step = pathExpr.getFirstStep();

        while (step != null) {
            if (step instanceof AxisExpression) {
                AxisExpression axisExpr = (AxisExpression) step;

                NodeTest nodeTest = axisExpr.getNodeTest();

                if (!(nodeTest instanceof NameTest)) {
                    break;
                }

                NameTest nameTest = (NameTest) nodeTest;

                QName childName = getQualifiedName(nameTest.getFingerprint(),
                        namePool, contextUris);

                if (Axis.CHILD == axisExpr.getAxis()) {
                    if (NodeKindTest.ELEMENT.getNodeKindMask() != nameTest.getNodeKindMask()) {
                        break;
                    }

                    NodeList children = ((Element) contextNode).getElementsByTagNameNS(childName.getNamespaceURI(),
                            childName.getLocalPart());
                    if ((children == null) || (children.getLength() == 0)) {
                        Node child = document.createElementNS(childName.getNamespaceURI(),
                                DOMUtils.getQualifiedName(childName));
                        contextNode.appendChild(child);
                        contextNode = child;
                    } else if (children.getLength() == 1) {
                        contextNode = children.item(0);
                    } else {
                        break;
                    }
                } else if (Axis.ATTRIBUTE == axisExpr.getAxis()) {
                    if (NodeKindTest.ATTRIBUTE.getNodeKindMask() != nameTest.getNodeKindMask()) {
                        break;
                    }

                    Attr attribute = ((Element) contextNode).getAttributeNodeNS(childName.getNamespaceURI(), childName.getLocalPart());
                    if (attribute == null) {
                        attribute = document.createAttributeNS(childName.getNamespaceURI(), childName.getLocalPart());
                        ((Element) contextNode).setAttributeNode(attribute);
                        contextNode = attribute;
                    } else {
                        break;
                    }

                } else {
                    break;
                }


            } else if (step instanceof ItemChecker) {
                ItemChecker itemChecker = (ItemChecker) step;
                Expression baseExpr = itemChecker.getBaseExpression();

                if (!(baseExpr instanceof VariableReference)) {
                    break;
                }
            } else {
                break;
            }

            if (pathExpr != null) {
                Expression remainingSteps = pathExpr.getRemainingSteps();

                if (remainingSteps instanceof PathExpression) {
                    pathExpr = (PathExpression) remainingSteps;
                    step = pathExpr.getFirstStep();
                } else if (remainingSteps instanceof AxisExpression) {
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        if ((contextNode == null) || !(contextNode instanceof Element) ||
                !(xpathExpr instanceof XPathExpressionImpl)) {
            return;
        }

        Expression expression = ((XPathExpressionImpl) xpathExpr).getInternalExpression();
        Iterator<Expression> subExpressions = (Iterator<Expression>) expression.iterateSubExpressions();

        if (!subExpressions.hasNext()) {
            return;
        }

        Expression subExpr = (Expression) subExpressions.next();

        if (!(subExpr instanceof PathExpression)) {
            return;
        }

        Document document = DOMUtils.toDOMDocument(contextNode);
        PathExpression pathExpr = (PathExpression) subExpr;
        Expression step = pathExpr.getFirstStep();

        while (step != null) {
            if (step instanceof AxisExpression) {
                AxisExpression axisExpr = (AxisExpression) step;

                NodeTest nodeTest = axisExpr.getNodeTest();

                if (!(nodeTest instanceof NameTest)) {
                    break;
                }

                NameTest nameTest = (NameTest) nodeTest;

                QName childName = getQualifiedName(nameTest.getFingerprint(),
                        namePool, contextUris);
               
                if (Axis.CHILD == axisExpr.getAxis()) {
                    if (NodeKindTest.ELEMENT.getNodeKindMask() != nameTest.getNodeKindMask()) {
                        break;
                    }
                 
                    NodeList children = ((Element) contextNode).getElementsByTagNameNS(childName.getNamespaceURI(),
                            childName.getLocalPart());
                    if ((children == null) || (children.getLength() == 0)) {
                        Node child = document.createElementNS(childName.getNamespaceURI(),
                                DOMUtils.getQualifiedName(childName));
                        contextNode.appendChild(child);
                        contextNode = child;
                    } else if (children.getLength() == 1) {
                        contextNode = children.item(0);
                    } else {
                        break;
                    }
                } else if (Axis.ATTRIBUTE == axisExpr.getAxis()) {
                    if (NodeKindTest.ATTRIBUTE.getNodeKindMask() != nameTest.getNodeKindMask()) {
                        break;
                    }
                   
                    Attr attribute = ((Element) contextNode).getAttributeNodeNS(childName.getNamespaceURI(), childName.getLocalPart());
                    if (attribute == null) {
                      attribute = document.createAttributeNS(childName.getNamespaceURI(), childName.getLocalPart());
                      ((Element) contextNode).setAttributeNode(attribute);
                      contextNode = attribute;
                    } else {
                      break;
                    }
                 
                } else {
                  break;
                }


            } else if (step instanceof ItemChecker) {
                ItemChecker itemChecker = (ItemChecker) step;
                Expression baseExpr = itemChecker.getBaseExpression();

                if (!(baseExpr instanceof VariableReference)) {
                    break;
                }
            } else {
                break;
            }

            if (pathExpr != null) {
                Expression remainingSteps = pathExpr.getRemainingSteps();

                if (remainingSteps instanceof PathExpression) {
                    pathExpr = (PathExpression) remainingSteps;
                    step = pathExpr.getFirstStep();
                } else if (remainingSteps instanceof AxisExpression) {
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Related Classes of net.sf.saxon.expr.Expression

  • net.sf.saxon.event.SequenceReceiver
  • net.sf.saxon.evpull.EventIteratorOverSequence
  • net.sf.saxon.evpull.SingletonEventIterator
  • net.sf.saxon.functions.Document
  • net.sf.saxon.functions.FunctionLibraryList
  • net.sf.saxon.functions.Idref
  • net.sf.saxon.functions.Matches
  • net.sf.saxon.functions.Remove
  • net.sf.saxon.functions.Replace
  • net.sf.saxon.functions.StringJoin
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