Examples with XObject org.apache.xpath.objects.XObject used on opensource projects

Example 86 with XObject

use of org.apache.xpath.objects.XObject in project robovm by robovm.

the class XPathImpl method evaluate.

/**
     * <p>Evaluate an XPath expression in the context of the specified <code>InputSource</code>
     * and return the result as the specified type.</p>
     *
     * <p>This method builds a data model for the {@link InputSource} and calls
     * {@link #evaluate(String expression, Object item, QName returnType)} on the resulting document object.</p>
     *
     * <p>See "Evaluation of XPath Expressions" section of JAXP 1.3 spec 
     * for context item evaluation,
     * variable, function and QName resolution and return type conversion.</p>
     *
     * <p>If <code>returnType</code> is not one of the types defined in {@link XPathConstants},
     * then an <code>IllegalArgumentException</code> is thrown.</p>
     *
     * <p>If <code>expression</code>, <code>source</code> or <code>returnType</code> is <code>null</code>,
     * then a <code>NullPointerException</code> is thrown.</p>
     *
     * @param expression The XPath expression.
     * @param source The input source of the document to evaluate over.
     * @param returnType The desired return type.
     *
     * @return The <code>Object</code> that encapsulates the result of evaluating the expression.
     *
     * @throws XPathExpressionException If expression cannot be evaluated.
     * @throws IllegalArgumentException If <code>returnType</code> is not one of the types defined in {@link XPathConstants}.
     * @throws NullPointerException If <code>expression</code>, <code>source</code> or <code>returnType</code>
     *   is <code>null</code>.
     */
public Object evaluate(String expression, InputSource source, QName returnType) throws XPathExpressionException {
    // Checking validity of different parameters
    if (source == null) {
        String fmsg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_ARG_CANNOT_BE_NULL, new Object[] { "source" });
        throw new NullPointerException(fmsg);
    }
    if (expression == null) {
        String fmsg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_ARG_CANNOT_BE_NULL, new Object[] { "XPath expression" });
        throw new NullPointerException(fmsg);
    }
    if (returnType == null) {
        String fmsg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_ARG_CANNOT_BE_NULL, new Object[] { "returnType" });
        throw new NullPointerException(fmsg);
    }
    //returnType need to be defined in XPathConstants
    if (!isSupported(returnType)) {
        String fmsg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_UNSUPPORTED_RETURN_TYPE, new Object[] { returnType.toString() });
        throw new IllegalArgumentException(fmsg);
    }
    try {
        Document document = getParser().parse(source);
        XObject resultObject = eval(expression, document);
        return getResultAsType(resultObject, returnType);
    } catch (SAXException e) {
        throw new XPathExpressionException(e);
    } catch (IOException e) {
        throw new XPathExpressionException(e);
    } catch (javax.xml.transform.TransformerException te) {
        Throwable nestedException = te.getException();
        if (nestedException instanceof javax.xml.xpath.XPathFunctionException) {
            throw (javax.xml.xpath.XPathFunctionException) nestedException;
        } else {
            throw new XPathExpressionException(te);
        }
    }
}

Example 87 with XObject

use of org.apache.xpath.objects.XObject in project robovm by robovm.

the class Operation method execute.

/**
   * Execute a binary operation by calling execute on each of the operands,
   * and then calling the operate method on the derived class.
   *
   *
   * @param xctxt The runtime execution context.
   *
   * @return The XObject result of the operation.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    XObject left = m_left.execute(xctxt, true);
    XObject right = m_right.execute(xctxt, true);
    XObject result = operate(left, right);
    left.detach();
    right.detach();
    return result;
}

Example 88 with XObject

use of org.apache.xpath.objects.XObject in project robovm by robovm.

the class ContextMatchStepPattern method executeRelativePathPattern.

/**
   * Execute the match pattern step relative to another step.
   *
   *
   * @param xctxt The XPath runtime context.
   * NEEDSDOC @param prevStep
   *
   * @return {@link org.apache.xpath.patterns.NodeTest#SCORE_NODETEST},
   *         {@link org.apache.xpath.patterns.NodeTest#SCORE_NONE},
   *         {@link org.apache.xpath.patterns.NodeTest#SCORE_NSWILD},
   *         {@link org.apache.xpath.patterns.NodeTest#SCORE_QNAME}, or
   *         {@link org.apache.xpath.patterns.NodeTest#SCORE_OTHER}.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject executeRelativePathPattern(XPathContext xctxt, StepPattern prevStep) throws javax.xml.transform.TransformerException {
    XObject score = NodeTest.SCORE_NONE;
    int context = xctxt.getCurrentNode();
    DTM dtm = xctxt.getDTM(context);
    if (null != dtm) {
        int predContext = xctxt.getCurrentNode();
        DTMAxisTraverser traverser;
        int axis = m_axis;
        boolean needToTraverseAttrs = WalkerFactory.isDownwardAxisOfMany(axis);
        boolean iterRootIsAttr = (dtm.getNodeType(xctxt.getIteratorRoot()) == DTM.ATTRIBUTE_NODE);
        if ((Axis.PRECEDING == axis) && iterRootIsAttr) {
            axis = Axis.PRECEDINGANDANCESTOR;
        }
        traverser = dtm.getAxisTraverser(axis);
        for (int relative = traverser.first(context); DTM.NULL != relative; relative = traverser.next(context, relative)) {
            try {
                xctxt.pushCurrentNode(relative);
                score = execute(xctxt);
                if (score != NodeTest.SCORE_NONE) {
                    //       predContext, relative);
                    if (executePredicates(xctxt, dtm, context))
                        return score;
                    score = NodeTest.SCORE_NONE;
                }
                if (needToTraverseAttrs && iterRootIsAttr && (DTM.ELEMENT_NODE == dtm.getNodeType(relative))) {
                    int xaxis = Axis.ATTRIBUTE;
                    for (int i = 0; i < 2; i++) {
                        DTMAxisTraverser atraverser = dtm.getAxisTraverser(xaxis);
                        for (int arelative = atraverser.first(relative); DTM.NULL != arelative; arelative = atraverser.next(relative, arelative)) {
                            try {
                                xctxt.pushCurrentNode(arelative);
                                score = execute(xctxt);
                                if (score != NodeTest.SCORE_NONE) {
                                    if (score != NodeTest.SCORE_NONE)
                                        return score;
                                }
                            } finally {
                                xctxt.popCurrentNode();
                            }
                        }
                        xaxis = Axis.NAMESPACE;
                    }
                }
            } finally {
                xctxt.popCurrentNode();
            }
        }
    }
    return score;
}

Example 89 with XObject

use of org.apache.xpath.objects.XObject in project robovm by robovm.

the class XPathExpressionImpl method eval.

private XObject eval(Object contextItem) throws javax.xml.transform.TransformerException {
    org.apache.xpath.XPathContext xpathSupport = null;
    // expressions.
    if (functionResolver != null) {
        JAXPExtensionsProvider jep = new JAXPExtensionsProvider(functionResolver, featureSecureProcessing);
        xpathSupport = new org.apache.xpath.XPathContext(jep, false);
    } else {
        xpathSupport = new org.apache.xpath.XPathContext(false);
    }
    xpathSupport.setVarStack(new JAXPVariableStack(variableResolver));
    XObject xobj = null;
    Node contextNode = (Node) contextItem;
    // dummy Document as Context Node
    if (contextNode == null) {
        contextNode = getDummyDocument();
    }
    xobj = xpath.execute(xpathSupport, contextNode, prefixResolver);
    return xobj;
}

Example 90 with XObject

use of org.apache.xpath.objects.XObject in project robovm by robovm.

the class PredicatedNodeTest method acceptNode.

//=============== NodeFilter Implementation ===============
/**
   *  Test whether a specified node is visible in the logical view of a
   * TreeWalker or NodeIterator. This function will be called by the
   * implementation of TreeWalker and NodeIterator; it is not intended to
   * be called directly from user code.
   * @param n  The node to check to see if it passes the filter or not.
   * @return  a constant to determine whether the node is accepted,
   *   rejected, or skipped, as defined  above .
   */
public short acceptNode(int n) {
    XPathContext xctxt = m_lpi.getXPathContext();
    try {
        xctxt.pushCurrentNode(n);
        XObject score = execute(xctxt, n);
        // System.out.println("\n::acceptNode - score: "+score.num()+"::");
        if (score != NodeTest.SCORE_NONE) {
            if (getPredicateCount() > 0) {
                countProximityPosition(0);
                if (!executePredicates(n, xctxt))
                    return DTMIterator.FILTER_SKIP;
            }
            return DTMIterator.FILTER_ACCEPT;
        }
    } catch (javax.xml.transform.TransformerException se) {
        // TODO: Fix this.
        throw new RuntimeException(se.getMessage());
    } finally {
        xctxt.popCurrentNode();
    }
    return DTMIterator.FILTER_SKIP;
}