Examples with DTMIterator org.apache.xml.dtm.DTMIterator used on opensource projects

Example 6 with DTMIterator

use of org.apache.xml.dtm.DTMIterator in project robovm by robovm.

the class FuncId method execute.

/**
   * Execute the function.  The function must return
   * a valid object.
   * @param xctxt The current execution context.
   * @return A valid XObject.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    int context = xctxt.getCurrentNode();
    DTM dtm = xctxt.getDTM(context);
    int docContext = dtm.getDocument();
    if (DTM.NULL == docContext)
        error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null);
    XObject arg = m_arg0.execute(xctxt);
    int argType = arg.getType();
    XNodeSet nodes = new XNodeSet(xctxt.getDTMManager());
    NodeSetDTM nodeSet = nodes.mutableNodeset();
    if (XObject.CLASS_NODESET == argType) {
        DTMIterator ni = arg.iter();
        StringVector usedrefs = null;
        int pos = ni.nextNode();
        while (DTM.NULL != pos) {
            DTM ndtm = ni.getDTM(pos);
            String refval = ndtm.getStringValue(pos).toString();
            pos = ni.nextNode();
            usedrefs = getNodesByID(xctxt, docContext, refval, usedrefs, nodeSet, DTM.NULL != pos);
        }
    // ni.detach();
    } else if (XObject.CLASS_NULL == argType) {
        return nodes;
    } else {
        String refval = arg.str();
        getNodesByID(xctxt, docContext, refval, null, nodeSet, false);
    }
    return nodes;
}

Example 7 with DTMIterator

use of org.apache.xml.dtm.DTMIterator in project robovm by robovm.

the class FuncPosition method getPositionInContextNodeList.

/**
   * Get the position in the current context node list.
   *
   * @param xctxt Runtime XPath context.
   *
   * @return The current position of the itteration in the context node list, 
   *         or -1 if there is no active context node list.
   */
public int getPositionInContextNodeList(XPathContext xctxt) {
    // System.out.println("FuncPosition- entry");
    // If we're in a predicate, then this will return non-null.
    SubContextList iter = m_isTopLevel ? null : xctxt.getSubContextList();
    if (null != iter) {
        int prox = iter.getProximityPosition(xctxt);
        // System.out.println("FuncPosition- prox: "+prox);
        return prox;
    }
    DTMIterator cnl = xctxt.getContextNodeList();
    if (null != cnl) {
        int n = cnl.getCurrentNode();
        if (n == DTM.NULL) {
            if (cnl.getCurrentPos() == 0)
                return 0;
            // a problem for current().
            try {
                cnl = cnl.cloneWithReset();
            } catch (CloneNotSupportedException cnse) {
                throw new org.apache.xml.utils.WrappedRuntimeException(cnse);
            }
            int currentNode = xctxt.getContextNode();
            // System.out.println("currentNode: "+currentNode);
            while (DTM.NULL != (n = cnl.nextNode())) {
                if (n == currentNode)
                    break;
            }
        }
        // System.out.println("FuncPosition- cnl.getCurrentPos(): "+cnl.getCurrentPos());
        return cnl.getCurrentPos();
    }
    // System.out.println("FuncPosition - out of guesses: -1");
    return -1;
}

Example 8 with DTMIterator

use of org.apache.xml.dtm.DTMIterator in project robovm by robovm.

the class FuncSum method execute.

/**
   * Execute the function.  The function must return
   * a valid object.
   * @param xctxt The current execution context.
   * @return A valid XObject.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    DTMIterator nodes = m_arg0.asIterator(xctxt, xctxt.getCurrentNode());
    double sum = 0.0;
    int pos;
    while (DTM.NULL != (pos = nodes.nextNode())) {
        DTM dtm = nodes.getDTM(pos);
        XMLString s = dtm.getStringValue(pos);
        if (null != s)
            sum += s.toDouble();
    }
    nodes.detach();
    return new XNumber(sum);
}

Example 9 with DTMIterator

use of org.apache.xml.dtm.DTMIterator in project robovm by robovm.

the class WalkerFactory method newDTMIterator.

/**
   * Create a new LocPathIterator iterator.  The exact type of iterator
   * returned is based on an analysis of the XPath operations.
   *
   * @param compiler non-null reference to compiler object that has processed
   *                 the XPath operations into an opcode map.
   * @param opPos The position of the operation code for this itterator.
   *
   * @return non-null reference to a LocPathIterator or derivative.
   *
   * @throws javax.xml.transform.TransformerException
   */
public static DTMIterator newDTMIterator(Compiler compiler, int opPos, boolean isTopLevel) throws javax.xml.transform.TransformerException {
    int firstStepPos = OpMap.getFirstChildPos(opPos);
    int analysis = analyze(compiler, firstStepPos, 0);
    boolean isOneStep = isOneStep(analysis);
    DTMIterator iter;
    // Is the iteration a one-step attribute pattern (i.e. select="@foo")?
    if (isOneStep && walksSelfOnly(analysis) && isWild(analysis) && !hasPredicate(analysis)) {
        if (DEBUG_ITERATOR_CREATION)
            diagnoseIterator("SelfIteratorNoPredicate", analysis, compiler);
        // Then use a simple iteration of the attributes, with node test 
        // and predicate testing.
        iter = new SelfIteratorNoPredicate(compiler, opPos, analysis);
    } else // Is the iteration exactly one child step?
    if (walksChildrenOnly(analysis) && isOneStep) {
        // Does the pattern specify *any* child with no predicate? (i.e. select="child::node()".
        if (isWild(analysis) && !hasPredicate(analysis)) {
            if (DEBUG_ITERATOR_CREATION)
                diagnoseIterator("ChildIterator", analysis, compiler);
            // Use simple child iteration without any test.
            iter = new ChildIterator(compiler, opPos, analysis);
        } else {
            if (DEBUG_ITERATOR_CREATION)
                diagnoseIterator("ChildTestIterator", analysis, compiler);
            // Else use simple node test iteration with predicate test.
            iter = new ChildTestIterator(compiler, opPos, analysis);
        }
    } else // Is the iteration a one-step attribute pattern (i.e. select="@foo")?
    if (isOneStep && walksAttributes(analysis)) {
        if (DEBUG_ITERATOR_CREATION)
            diagnoseIterator("AttributeIterator", analysis, compiler);
        // Then use a simple iteration of the attributes, with node test 
        // and predicate testing.
        iter = new AttributeIterator(compiler, opPos, analysis);
    } else if (isOneStep && !walksFilteredList(analysis)) {
        if (!walksNamespaces(analysis) && (walksInDocOrder(analysis) || isSet(analysis, BIT_PARENT))) {
            if (false || DEBUG_ITERATOR_CREATION)
                diagnoseIterator("OneStepIteratorForward", analysis, compiler);
            // Then use a simple iteration of the attributes, with node test 
            // and predicate testing.
            iter = new OneStepIteratorForward(compiler, opPos, analysis);
        } else {
            if (false || DEBUG_ITERATOR_CREATION)
                diagnoseIterator("OneStepIterator", analysis, compiler);
            // Then use a simple iteration of the attributes, with node test 
            // and predicate testing.
            iter = new OneStepIterator(compiler, opPos, analysis);
        }
    } else // to work right.
    if (isOptimizableForDescendantIterator(compiler, firstStepPos, 0)) // && getStepCount(analysis) <= 3 
    // && walksDescendants(analysis) 
    // && walksSubtreeOnlyFromRootOrContext(analysis)
    {
        if (DEBUG_ITERATOR_CREATION)
            diagnoseIterator("DescendantIterator", analysis, compiler);
        iter = new DescendantIterator(compiler, opPos, analysis);
    } else {
        if (isNaturalDocOrder(compiler, firstStepPos, 0, analysis)) {
            if (false || DEBUG_ITERATOR_CREATION) {
                diagnoseIterator("WalkingIterator", analysis, compiler);
            }
            iter = new WalkingIterator(compiler, opPos, analysis, true);
        } else {
            //        return new MatchPatternIterator(compiler, opPos, analysis);
            if (DEBUG_ITERATOR_CREATION)
                diagnoseIterator("WalkingIteratorSorted", analysis, compiler);
            iter = new WalkingIteratorSorted(compiler, opPos, analysis, true);
        }
    }
    if (iter instanceof LocPathIterator)
        ((LocPathIterator) iter).setIsTopLevel(isTopLevel);
    return iter;
}

Example 10 with DTMIterator

use of org.apache.xml.dtm.DTMIterator in project robovm by robovm.

the class FunctionPattern method execute.

/**
   * Test a node to see if it matches the given node test.
   *
   * @param xctxt XPath runtime context.
   *
   * @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 execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    int context = xctxt.getCurrentNode();
    DTMIterator nl = m_functionExpr.asIterator(xctxt, context);
    XNumber score = SCORE_NONE;
    if (null != nl) {
        int n;
        while (DTM.NULL != (n = nl.nextNode())) {
            score = (n == context) ? SCORE_OTHER : SCORE_NONE;
            if (score == SCORE_OTHER) {
                context = n;
                break;
            }
        }
        nl.detach();
    }
    return score;
}