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

Example 6 with XNumber

use of org.apache.xpath.objects.XNumber in project j2objc by google.

the class WalkerFactory method loadSteps.

/**
 * Read a <a href="http://www.w3.org/TR/xpath#location-paths">LocationPath</a>
 * as a generalized match pattern.  What this means is that the LocationPath
 * is read backwards, as a test on a given node, to see if it matches the
 * criteria of the selection, and ends up at the context node.  Essentially,
 * this is a backwards query from a given node, to find the context node.
 * <p>So, the selection "foo/daz[2]" is, in non-abreviated expanded syntax,
 * "self::node()/following-sibling::foo/child::daz[position()=2]".
 * Taking this as a match pattern for a probable node, it works out to
 * "self::daz/parent::foo[child::daz[position()=2 and isPrevStepNode()]
 * precedingSibling::node()[isContextNodeOfLocationPath()]", adding magic
 * isPrevStepNode and isContextNodeOfLocationPath operations.  Predicates in
 * the location path have to be executed by the following step,
 * because they have to know the context of their execution.
 *
 * @param mpi The MatchPatternIterator to which the steps will be attached.
 * @param compiler The compiler that holds the syntax tree/op map to
 * construct from.
 * @param stepOpCodePos The current op code position within the opmap.
 * @param stepIndex The top-level step index withing the iterator.
 *
 * @return A StepPattern object, which may contain relative StepPatterns.
 *
 * @throws javax.xml.transform.TransformerException
 */
static StepPattern loadSteps(MatchPatternIterator mpi, Compiler compiler, int stepOpCodePos, int stepIndex) throws javax.xml.transform.TransformerException {
    if (DEBUG_PATTERN_CREATION) {
        System.out.println("================");
        System.out.println("loadSteps for: " + compiler.getPatternString());
    }
    int stepType;
    StepPattern step = null;
    StepPattern firstStep = null, prevStep = null;
    int analysis = analyze(compiler, stepOpCodePos, stepIndex);
    while (OpCodes.ENDOP != (stepType = compiler.getOp(stepOpCodePos))) {
        step = createDefaultStepPattern(compiler, stepOpCodePos, mpi, analysis, firstStep, prevStep);
        if (null == firstStep) {
            firstStep = step;
        } else {
            // prevStep.setNextWalker(step);
            step.setRelativePathPattern(prevStep);
        }
        prevStep = step;
        stepOpCodePos = compiler.getNextStepPos(stepOpCodePos);
        if (stepOpCodePos < 0)
            break;
    }
    int axis = Axis.SELF;
    int paxis = Axis.SELF;
    StepPattern tail = step;
    for (StepPattern pat = step; null != pat; pat = pat.getRelativePathPattern()) {
        int nextAxis = pat.getAxis();
        // int nextPaxis = pat.getPredicateAxis();
        pat.setAxis(axis);
        // The predicate axis can't be moved!!!  Test Axes103
        // pat.setPredicateAxis(paxis);
        // If we have an attribute or namespace axis that went up, then
        // it won't find the attribute in the inverse, since the select-to-match
        // axes are not invertable (an element is a parent of an attribute, but
        // and attribute is not a child of an element).
        // If we don't do the magic below, then "@*/ancestor-or-self::*" gets
        // inverted for match to "self::*/descendant-or-self::@*/parent::node()",
        // which obviously won't work.
        // So we will rewrite this as:
        // "self::*/descendant-or-self::*/attribute::*/parent::node()"
        // Child has to be rewritten a little differently:
        // select: "@*/parent::*"
        // inverted match: "self::*/child::@*/parent::node()"
        // rewrite: "self::*/attribute::*/parent::node()"
        // Axes that go down in the select, do not have to have special treatment
        // in the rewrite. The following inverted match will still not select
        // anything.
        // select: "@*/child::*"
        // inverted match: "self::*/parent::@*/parent::node()"
        // Lovely business, this.
        // -sb
        int whatToShow = pat.getWhatToShow();
        if (whatToShow == DTMFilter.SHOW_ATTRIBUTE || whatToShow == DTMFilter.SHOW_NAMESPACE) {
            int newAxis = (whatToShow == DTMFilter.SHOW_ATTRIBUTE) ? Axis.ATTRIBUTE : Axis.NAMESPACE;
            if (isDownwardAxisOfMany(axis)) {
                StepPattern attrPat = new StepPattern(whatToShow, pat.getNamespace(), pat.getLocalName(), // newAxis, pat.getPredicateAxis);
                newAxis, // don't care about the predicate axis
                0);
                XNumber score = pat.getStaticScore();
                pat.setNamespace(null);
                pat.setLocalName(NodeTest.WILD);
                attrPat.setPredicates(pat.getPredicates());
                pat.setPredicates(null);
                pat.setWhatToShow(DTMFilter.SHOW_ELEMENT);
                StepPattern rel = pat.getRelativePathPattern();
                pat.setRelativePathPattern(attrPat);
                attrPat.setRelativePathPattern(rel);
                attrPat.setStaticScore(score);
                // inverseable.
                if (Axis.PRECEDING == pat.getAxis())
                    pat.setAxis(Axis.PRECEDINGANDANCESTOR);
                else if (Axis.DESCENDANT == pat.getAxis())
                    pat.setAxis(Axis.DESCENDANTORSELF);
                pat = attrPat;
            } else if (Axis.CHILD == pat.getAxis()) {
                // In this case just change the axis.
                // pat.setWhatToShow(whatToShow);
                pat.setAxis(Axis.ATTRIBUTE);
            }
        }
        axis = nextAxis;
        // paxis = nextPaxis;
        tail = pat;
    }
    if (axis < Axis.ALL) {
        StepPattern selfPattern = new ContextMatchStepPattern(axis, paxis);
        // We need to keep the new nodetest from affecting the score...
        XNumber score = tail.getStaticScore();
        tail.setRelativePathPattern(selfPattern);
        tail.setStaticScore(score);
        selfPattern.setStaticScore(score);
    }
    if (DEBUG_PATTERN_CREATION) {
        System.out.println("Done loading steps: " + step.toString());
        System.out.println("");
    }
    // start from last pattern?? //firstStep;
    return step;
}

Example 7 with XNumber

use of org.apache.xpath.objects.XNumber in project j2objc by google.

the class FuncRound 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 {
    final XObject obj = m_arg0.execute(xctxt);
    final double val = obj.num();
    if (val >= -0.5 && val < 0)
        return new XNumber(-0.0);
    if (val == 0.0)
        return new XNumber(val);
    return new XNumber(java.lang.Math.floor(val + 0.5));
}

Example 8 with XNumber

use of org.apache.xpath.objects.XNumber in project j2objc by google.

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, int context) throws javax.xml.transform.TransformerException {
    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();
    }
    nl.detach();
    return score;
}

Example 9 with XNumber

use of org.apache.xpath.objects.XNumber 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, int context, DTM dtm, int expType) throws javax.xml.transform.TransformerException {
    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;
}

Example 10 with XNumber

use of org.apache.xpath.objects.XNumber 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, int context) throws javax.xml.transform.TransformerException {
    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();
    }
    nl.detach();
    return score;
}