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

Example 56 with XObject

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

the class MatchPatternIterator method acceptNode.

/**
   *  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) {
    try {
        xctxt.pushCurrentNode(n);
        xctxt.pushIteratorRoot(m_context);
        if (DEBUG) {
            System.out.println("traverser: " + m_traverser);
            System.out.print("node: " + n);
            System.out.println(", " + m_cdtm.getNodeName(n));
            // if(m_cdtm.getNodeName(n).equals("near-east"))
            System.out.println("pattern: " + m_pattern.toString());
            m_pattern.debugWhatToShow(m_pattern.getWhatToShow());
        }
        XObject score = m_pattern.execute(xctxt);
        if (DEBUG) {
            // System.out.println("analysis: "+Integer.toBinaryString(m_analysis));
            System.out.println("score: " + score);
            System.out.println("skip: " + (score == NodeTest.SCORE_NONE));
        }
        // System.out.println("\n::acceptNode - score: "+score.num()+"::");
        return (score == NodeTest.SCORE_NONE) ? DTMIterator.FILTER_SKIP : DTMIterator.FILTER_ACCEPT;
    } catch (javax.xml.transform.TransformerException se) {
        // TODO: Fix this.
        throw new RuntimeException(se.getMessage());
    } finally {
        xctxt.popCurrentNode();
        xctxt.popIteratorRoot();
    }
}

Example 57 with XObject

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

the class StepPattern method executePredicates.

/**
   * Execute the predicates on this step to determine if the current node 
   * should be filtered or accepted.
   *
   * @param xctxt The XPath runtime context.
   * @param dtm The DTM of the current node.
   * @param currentNode The current node context.
   *
   * @return true if the node should be accepted, false otherwise.
   *
   * @throws javax.xml.transform.TransformerException
   */
protected final boolean executePredicates(XPathContext xctxt, DTM dtm, int currentNode) throws javax.xml.transform.TransformerException {
    boolean result = true;
    boolean positionAlreadySeen = false;
    int n = getPredicateCount();
    try {
        xctxt.pushSubContextList(this);
        for (int i = 0; i < n; i++) {
            xctxt.pushPredicatePos(i);
            try {
                XObject pred = m_predicates[i].execute(xctxt);
                try {
                    if (XObject.CLASS_NUMBER == pred.getType()) {
                        int pos = (int) pred.num();
                        if (positionAlreadySeen) {
                            result = (pos == 1);
                            break;
                        } else {
                            positionAlreadySeen = true;
                            if (!checkProximityPosition(xctxt, i, dtm, currentNode, pos)) {
                                result = false;
                                break;
                            }
                        }
                    } else if (!pred.boolWithSideEffects()) {
                        result = false;
                        break;
                    }
                } finally {
                    pred.detach();
                }
            } finally {
                xctxt.popPredicatePos();
            }
        }
    } finally {
        xctxt.popSubContextList();
    }
    return result;
}

Example 58 with XObject

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

the class StepPattern method getProximityPosition.

/**
   * Get the proximity position index of the current node based on this
   * node test.
   *
   *
   * @param xctxt XPath runtime context.
   * @param predPos Which predicate we're evaluating of foo[1][2][3].
   * @param findLast If true, don't terminate when the context node is found.
   *
   * @return the proximity position index of the current node based on the
   *         node test.
   */
private final int getProximityPosition(XPathContext xctxt, int predPos, boolean findLast) {
    int pos = 0;
    int context = xctxt.getCurrentNode();
    DTM dtm = xctxt.getDTM(context);
    int parent = dtm.getParent(context);
    try {
        DTMAxisTraverser traverser = dtm.getAxisTraverser(Axis.CHILD);
        for (int child = traverser.first(parent); DTM.NULL != child; child = traverser.next(parent, child)) {
            try {
                xctxt.pushCurrentNode(child);
                if (NodeTest.SCORE_NONE != super.execute(xctxt, child)) {
                    boolean pass = true;
                    try {
                        xctxt.pushSubContextList(this);
                        for (int i = 0; i < predPos; i++) {
                            xctxt.pushPredicatePos(i);
                            try {
                                XObject pred = m_predicates[i].execute(xctxt);
                                try {
                                    if (XObject.CLASS_NUMBER == pred.getType()) {
                                        if ((pos + 1) != (int) pred.numWithSideEffects()) {
                                            pass = false;
                                            break;
                                        }
                                    } else if (!pred.boolWithSideEffects()) {
                                        pass = false;
                                        break;
                                    }
                                } finally {
                                    pred.detach();
                                }
                            } finally {
                                xctxt.popPredicatePos();
                            }
                        }
                    } finally {
                        xctxt.popSubContextList();
                    }
                    if (pass)
                        pos++;
                    if (!findLast && child == context) {
                        return pos;
                    }
                }
            } finally {
                xctxt.popCurrentNode();
            }
        }
    } catch (javax.xml.transform.TransformerException se) {
        // TODO: should keep throw sax exception...
        throw new java.lang.RuntimeException(se.getMessage());
    }
    return pos;
}

Example 59 with XObject

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

the class StepPattern method execute.

/**
   * Execute an expression in the XPath runtime context, and return the
   * result of the expression.
   *
   *
   * @param xctxt The XPath runtime context.
   * @param currentNode The currentNode.
   * @param dtm The DTM of the current node.
   * @param expType The expanded type ID of the current node.
   *
   * @return The result of the expression in the form of a <code>XObject</code>.
   *
   * @throws javax.xml.transform.TransformerException if a runtime exception
   *         occurs.
   */
public XObject execute(XPathContext xctxt, int currentNode, DTM dtm, int expType) throws javax.xml.transform.TransformerException {
    if (m_whatToShow == NodeTest.SHOW_BYFUNCTION) {
        if (null != m_relativePathPattern) {
            return m_relativePathPattern.execute(xctxt);
        } else
            return NodeTest.SCORE_NONE;
    }
    XObject score;
    score = super.execute(xctxt, currentNode, dtm, expType);
    if (score == NodeTest.SCORE_NONE)
        return NodeTest.SCORE_NONE;
    if (getPredicateCount() != 0) {
        if (!executePredicates(xctxt, dtm, currentNode))
            return NodeTest.SCORE_NONE;
    }
    if (null != m_relativePathPattern)
        return m_relativePathPattern.executeRelativePathPattern(xctxt, dtm, currentNode);
    return score;
}

Example 60 with XObject

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

the class StepPattern method executeRelativePathPattern.

/**
   * Execute the match pattern step relative to another step.
   *
   *
   * @param xctxt The XPath runtime context.
   * @param dtm The DTM of the current node.
   * @param currentNode The current node 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
   */
protected final XObject executeRelativePathPattern(XPathContext xctxt, DTM dtm, int currentNode) throws javax.xml.transform.TransformerException {
    XObject score = NodeTest.SCORE_NONE;
    int context = currentNode;
    DTMAxisTraverser traverser;
    traverser = dtm.getAxisTraverser(m_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)
                break;
        } finally {
            xctxt.popCurrentNode();
        }
    }
    return score;
}