Examples of org.apache.commons.jxpath.ri.compiler.Expression

Package org.apache.commons.jxpath.ri.compiler

Examples of org.apache.commons.jxpath.ri.compiler.Expression

org.apache.commons.jxpath.ri.compiler.Expression
Common superclass for several types of nodes in the parse tree. Provides APIs for optimization of evaluation of expressions. Specifically, an expression only needs to executed once during the evaluation of an xpath if that expression is context-independent. Expression.isContextDependent() provides that hint. @author Dmitri Plotnikov @version $Revision: 1.6 $ $Date: 2003/03/11 00:59:22 $

        if (currentPredicate == predicates.length) {
            NodePointer pointer = (NodePointer) parents.get(0);
            return doStep(context, pointer, steps, currentStep + 1);
        }


        Expression predicate = predicates[currentPredicate];
        if (predicate instanceof NameAttributeTest) {
            String key = keyFromPredicate(context, predicate);
            List newList = new ArrayList();
            for (int i = 0; i < parents.size(); i++) {
                NodePointer pointer = (NodePointer) parents.get(i);

View Full Code Here

    private static NodePointer doPredicateIndex(
            EvalContext context, NodePointer parent,
            Step[] steps, int currentStep,
            Expression[] predicates, int currentPredicate)
    {
        Expression predicate = predicates[currentPredicate];
        int index = indexFromPredicate(context, predicate);
        NodePointer pointer = parent;
        if (isCollectionElement(pointer, index)) {
            pointer = (NodePointer) pointer.clone();
            pointer.setIndex(index);

View Full Code Here

     * [@name=expression].
     */
    private static String keyFromPredicate(EvalContext context,
                Expression predicate) 
    {
        Expression expr =
            ((NameAttributeTest) predicate).getNameTestExpression();
        return InfoSetUtil.stringValue(expr.computeValue(context));
    }

View Full Code Here

            pointer.setAttribute(axis == Compiler.AXIS_ATTRIBUTE);
            parent = pointer;
        }
        // else { it is self::node() }


        Expression predicates[] = step.getPredicates();
        return createNullPointerForPredicates(
            context,
            parent,
            steps,
            currentStep,

View Full Code Here

            EvalContext context, NodePointer parent,
            Step[] steps, int currentStep,
            Expression predicates[], int currentPredicate)
    {
        for (int i = currentPredicate; i < predicates.length; i++) {
            Expression predicate = predicates[i];
            if (predicate instanceof NameAttributeTest) {
                String key = keyFromPredicate(context, predicate);
                parent = valuePointer(parent);
                NullPropertyPointer pointer = new NullPropertyPointer(parent);
                pointer.setNameAttributeValue(key);

View Full Code Here

    protected CompiledExpression compilePath(String xpath) {
        return new JXPathCompiledExpression(xpath, compileExpression(xpath));
    }


    private Expression compileExpression(String xpath) {
        Expression expr;


        synchronized (compiled) {
            if (USE_SOFT_CACHE) {
                expr = null;
                SoftReference ref = (SoftReference) compiled.get(xpath);

View Full Code Here

    /**
     * Traverses the xpath and returns the resulting object. Primitive
     * types are wrapped into objects.
     */
    public Object getValue(String xpath) {
        Expression expression = compileExpression(xpath);
// TODO: (work in progress) - trying to integrate with Xalan
//        Object ctxNode = getNativeContextNode(expression);
//        if (ctxNode != null) {
//            System.err.println("WILL USE XALAN: " + xpath);
//            CachedXPathAPI api = new CachedXPathAPI();

View Full Code Here

    /**
     * Calls getValue(xpath), converts the result to the required type
     * and returns the result of the conversion.
     */
    public Object getValue(String xpath, Class requiredType) {
        Expression expr = compileExpression(xpath);
        return getValue(xpath, expr, requiredType);
    }

View Full Code Here

0 1 2 3

TOP

Related Classes of org.apache.commons.jxpath.ri.compiler.Expression

org.apache.commons.jxpath.JXPathTestCase

org.apache.commons.jxpath.ri.axes.SimplePathInterpreter

org.apache.commons.jxpath.ri.JXPathContextReferenceImpl

org.apache.commons.jxpath.ri.QName

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.