Examples with Expression org.apache.xpath.Expression used on opensource projects

Example 11 with Expression

use of org.apache.xpath.Expression in project j2objc by google.

the class FuncExtFunction 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 {
    if (xctxt.isSecureProcessing())
        throw new javax.xml.transform.TransformerException(XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED, new Object[] { toString() }));
    XObject result;
    Vector argVec = new Vector();
    int nArgs = m_argVec.size();
    for (int i = 0; i < nArgs; i++) {
        Expression arg = (Expression) m_argVec.elementAt(i);
        XObject xobj = arg.execute(xctxt);
        /*
       * Should cache the arguments for func:function
       */
        xobj.allowDetachToRelease(false);
        argVec.addElement(xobj);
    }
    //dml
    ExtensionsProvider extProvider = (ExtensionsProvider) xctxt.getOwnerObject();
    Object val = extProvider.extFunction(this, argVec);
    if (null != val) {
        result = XObject.create(val, xctxt);
    } else {
        result = new XNull();
    }
    return result;
}

Example 12 with Expression

use of org.apache.xpath.Expression in project j2objc by google.

the class FuncExtFunction method callArgVisitors.

/**
   * Call the visitors for the function arguments.
   */
public void callArgVisitors(XPathVisitor visitor) {
    for (int i = 0; i < m_argVec.size(); i++) {
        Expression exp = (Expression) m_argVec.elementAt(i);
        exp.callVisitors(new ArgExtOwner(exp), visitor);
    }
}

Example 13 with Expression

use of org.apache.xpath.Expression in project j2objc by google.

the class VariableSafeAbsRef method execute.

/**
   * Dereference the variable, and return the reference value.  Note that lazy 
   * evaluation will occur.  If a variable within scope is not found, a warning 
   * will be sent to the error listener, and an empty nodeset will be returned.
   *
   *
   * @param xctxt The runtime execution context.
   *
   * @return The evaluated variable, or an empty nodeset if not found.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject execute(XPathContext xctxt, boolean destructiveOK) throws javax.xml.transform.TransformerException {
    XNodeSet xns = (XNodeSet) super.execute(xctxt, destructiveOK);
    DTMManager dtmMgr = xctxt.getDTMManager();
    int context = xctxt.getContextNode();
    if (dtmMgr.getDTM(xns.getRoot()).getDocument() != dtmMgr.getDTM(context).getDocument()) {
        Expression expr = (Expression) xns.getContainedIter();
        xns = (XNodeSet) expr.asIterator(xctxt, context);
    }
    return xns;
}

Example 14 with Expression

use of org.apache.xpath.Expression in project j2objc by google.

the class FuncFormatNumb 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 {
    // A bit of an ugly hack to get our context.
    ElemTemplateElement templElem = (ElemTemplateElement) xctxt.getNamespaceContext();
    StylesheetRoot ss = templElem.getStylesheetRoot();
    java.text.DecimalFormat formatter = null;
    java.text.DecimalFormatSymbols dfs = null;
    double num = getArg0().execute(xctxt).num();
    String patternStr = getArg1().execute(xctxt).str();
    // TODO: what should be the behavior here??
    if (patternStr.indexOf(0x00A4) > 0)
        // currency sign not allowed
        ss.error(XSLTErrorResources.ER_CURRENCY_SIGN_ILLEGAL);
    // decimal-format declared in the stylesheet!(xsl:decimal-format
    try {
        Expression arg2Expr = getArg2();
        if (null != arg2Expr) {
            String dfName = arg2Expr.execute(xctxt).str();
            QName qname = new QName(dfName, xctxt.getNamespaceContext());
            dfs = ss.getDecimalFormatComposed(qname);
            if (null == dfs) {
                warn(xctxt, XSLTErrorResources.WG_NO_DECIMALFORMAT_DECLARATION, //"not found!!!
                new Object[] { dfName });
            //formatter = new java.text.DecimalFormat(patternStr);
            } else {
                //formatter = new java.text.DecimalFormat(patternStr, dfs);
                formatter = new java.text.DecimalFormat();
                formatter.setDecimalFormatSymbols(dfs);
                formatter.applyLocalizedPattern(patternStr);
            }
        }
        //else
        if (null == formatter) {
            // look for a possible default decimal-format
            dfs = ss.getDecimalFormatComposed(new QName(""));
            if (dfs != null) {
                formatter = new java.text.DecimalFormat();
                formatter.setDecimalFormatSymbols(dfs);
                formatter.applyLocalizedPattern(patternStr);
            } else {
                dfs = new java.text.DecimalFormatSymbols(java.util.Locale.US);
                dfs.setInfinity(Constants.ATTRVAL_INFINITY);
                dfs.setNaN(Constants.ATTRVAL_NAN);
                formatter = new java.text.DecimalFormat();
                formatter.setDecimalFormatSymbols(dfs);
                if (null != patternStr)
                    formatter.applyLocalizedPattern(patternStr);
            }
        }
        return new XString(formatter.format(num));
    } catch (Exception iae) {
        templElem.error(XSLTErrorResources.ER_MALFORMED_FORMAT_STRING, new Object[] { patternStr });
        return XString.EMPTYSTRING;
    //throw new XSLProcessorException(iae);
    }
}

Example 15 with Expression

use of org.apache.xpath.Expression in project j2objc by google.

the class RedundentExprEliminator method findAndEliminateRedundant.

/**
   * Look through the vector from start point, looking for redundant occurances.
   * When one or more are found, create a psuedo variable declaration, insert 
   * it into the stylesheet, and replace the occurance with a reference to 
   * the psuedo variable.  When a redundent variable is found, it's slot in 
   * the vector will be replaced by null.
   * 
   * @param start The position to start looking in the vector.
   * @param firstOccuranceIndex The position of firstOccuranceOwner.
   * @param firstOccuranceOwner The owner of the expression we are looking for.
   * @param psuedoVarRecipient Where to put the psuedo variables.
   * 
   * @return The number of expression occurances that were modified.
   */
protected int findAndEliminateRedundant(int start, int firstOccuranceIndex, ExpressionOwner firstOccuranceOwner, ElemTemplateElement psuedoVarRecipient, Vector paths) throws org.w3c.dom.DOMException {
    MultistepExprHolder head = null;
    MultistepExprHolder tail = null;
    int numPathsFound = 0;
    int n = paths.size();
    Expression expr1 = firstOccuranceOwner.getExpression();
    if (DEBUG)
        assertIsLocPathIterator(expr1, firstOccuranceOwner);
    boolean isGlobal = (paths == m_absPaths);
    LocPathIterator lpi = (LocPathIterator) expr1;
    int stepCount = countSteps(lpi);
    for (int j = start; j < n; j++) {
        ExpressionOwner owner2 = (ExpressionOwner) paths.elementAt(j);
        if (null != owner2) {
            Expression expr2 = owner2.getExpression();
            boolean isEqual = expr2.deepEquals(lpi);
            if (isEqual) {
                LocPathIterator lpi2 = (LocPathIterator) expr2;
                if (null == head) {
                    head = new MultistepExprHolder(firstOccuranceOwner, stepCount, null);
                    tail = head;
                    numPathsFound++;
                }
                tail.m_next = new MultistepExprHolder(owner2, stepCount, null);
                tail = tail.m_next;
                // Null out the occurance, so we don't have to test it again.
                paths.setElementAt(null, j);
                // foundFirst = true;
                numPathsFound++;
            }
        }
    }
    // Change all globals in xsl:templates, etc, to global vars no matter what.
    if ((0 == numPathsFound) && isGlobal) {
        head = new MultistepExprHolder(firstOccuranceOwner, stepCount, null);
        numPathsFound++;
    }
    if (null != head) {
        ElemTemplateElement root = isGlobal ? psuedoVarRecipient : findCommonAncestor(head);
        LocPathIterator sharedIter = (LocPathIterator) head.m_exprOwner.getExpression();
        ElemVariable var = createPseudoVarDecl(root, sharedIter, isGlobal);
        if (DIAGNOSE_MULTISTEPLIST)
            System.err.println("Created var: " + var.getName() + (isGlobal ? "(Global)" : ""));
        QName uniquePseudoVarName = var.getName();
        while (null != head) {
            ExpressionOwner owner = head.m_exprOwner;
            if (DIAGNOSE_MULTISTEPLIST)
                diagnoseLineNumber(owner.getExpression());
            changeToVarRef(uniquePseudoVarName, owner, paths, root);
            head = head.m_next;
        }
        // Replace the first occurance with the variable's XPath, so  
        // that further reduction may take place if needed.
        paths.setElementAt(var.getSelect(), firstOccuranceIndex);
    }
    return numPathsFound;
}