Examples of com.volantis.xml.expression.ExpressionFactory

com.volantis.xml.expression.ExpressionFactory
A class for creating expression specific objects.
Note: it is not possible to pass a null value to the overloaded {@link #createSequence} functions without an explicitcast. However, it is better to use {@link Sequence.EMPTY} to obtain anempty sequence. The same issue exists for the methods {@link #createDateTimeValue}, {@link #createDateValue} and {@link #createTimeValue}.

Warning: This is a facade provided for use by user code, not for implementation in user code. User implementations of this interface are highly likely to be incompatible with future releases of the product at both binary and source levels.
@volantis-api-include-in PublicAPI @volantis-api-include-in ProfessionalServicesAPI @volantis-api-include-in InternalAPI @mock.generate

                           Object right,
                           ValueComparator comparator) {
        boolean result = false;


        try {
            ExpressionFactory factory = getExpressionFactory();


            Sequence lseq = JXPathExpression.asValue(factory, left).
                    getSequence();
            Sequence rseq = JXPathExpression.asValue(factory, right).
                    getSequence();

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     */
    static Value compute(Object left, Object right, BinaryOperator operator) {
        Value result;


        try {
            ExpressionFactory factory = getExpressionFactory();


            Sequence lseq = JXPathExpression.asValue(factory, left)
                    .getSequence();
            Sequence rseq = JXPathExpression.asValue(factory, right)
                    .getSequence();

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     */
    static Value compute(Object arg, UnaryOperator operator) {
        Value result;


        try {
            ExpressionFactory factory = getExpressionFactory();


            Sequence seq = JXPathExpression.asValue(factory, arg).getSequence();


            result = PipelineExpressionHelper.compute(seq, operator);
        } catch (ExpressionException e) {

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     */
    private Sequence evaluateExpression(
            final ExpressionContext expressionContext,
            String expressionAsString)
            throws ExtendedSAXException {
        ExpressionFactory factory = expressionContext.getFactory();
        ExpressionParser parser = factory.createExpressionParser();
        Sequence sequence;
        try {
            Expression expression = parser.parse(expressionAsString);
            Value value = expression.evaluate(expressionContext);
            sequence = value.getSequence();

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        XMLPipelineFactory pipelineFactory = createTestable();
        // create a config
        XMLPipelineConfiguration config = 
                pipelineFactory.createPipelineConfiguration();
        // get hold of an ExpressionFactory
        ExpressionFactory expressionFactory =
                pipelineFactory.getExpressionFactory();
        
        // create an expression context
        ExpressionContext expressionContext = 
                expressionFactory .createExpressionContext(null, null);        
        
        // return a context 
        return factory.createPipelineContext(config, expressionContext);
    }

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     * Tests the {@link XMLPipelineFactory#getExpressionFactory} method.
     * @throws Exception if an error occurs.
     */ 
    public void testGetExpressionFactory() throws Exception {
        // retrieve the expression factory
        ExpressionFactory expressionFactory = 
                factory.getExpressionFactory();
        // ensure the expression factory is of the correct type
        assertEquals("getExpressionFactory should return the default " +
                     "ExpressionFactory instance", 
                     ExpressionFactory.getDefaultInstance(),

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        Value result;
        if (arguments.length == 0) {
            result = Sequence.EMPTY;
        } else {
            ExpressionFactory factory = context.getFactory();


            DurationValue duration = factory.createDurationValue(
                    arguments[0].stringValue().asJavaString());
            result = getValue(factory, duration);
        }
        return result;
    }

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        EnvironmentContext environmentContext = new ServletEnvironmentContext(
                requestContext);
        ContextInternals.setEnvironmentContext(requestContext,
                environmentContext);


        ExpressionFactory expressionFactory = ExpressionFactory.getDefaultInstance();


        ExpressionContext expressionContext =
                expressionFactory.createExpressionContext(
                        null,
                        NamespaceFactory.getDefaultInstance()
                        .createPrefixTracker());


        expressionContext.setProperty(MarinerRequestContext.class,

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            return 0;
        }
    }
    
    public void testParameters() throws Exception {
        ExpressionFactory factory = new JXPathExpressionFactory();
        TestFunction testFunction = new TestFunction(factory);
        // @todo later fix parameters
        ExpressionContext context = factory.createExpressionContext(null, null);
        JXPathExpressionFunctionAdapter adapter =
                new JXPathExpressionFunctionAdapter(factory,
                                                    testFunction,
                                                    context);
        Item[] items = {factory.createIntValue(1),
                        factory.createIntValue(2),
                        factory.createStringValue("3")};
        int[] ints = {42, 255, 7};
        String[] strings = {"ho", "ho", "little", "boy"};
        Object[] paramList = {new Integer(0),
                              "fred",
                              new Double(2.4),
                              new String(),
                              new Boolean(true),
                              factory.createBooleanValue(false),
                              factory.createSequence(items),
                              factory.createStringValue("abc"),
                              ints,
                              strings,
                              items};
        Value result = (Value)adapter.invoke(
            new TestExpressionContext(), paramList);

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        Dependency dependency = new TestDependency(cacheability, timeToLive,
                freshness, revalidated);
        DependencyContext dependencyContext = context.getDependencyContext();
        dependencyContext.addDependency(dependency);


        ExpressionFactory factory = context.getFactory();
        return factory.createStringValue("freshness = " + freshness + ", " +
                "revalidate = " + revalidated + ", " +
                "cacheable = " + cacheable + ", " +
                "time-to-live = " + timeToLive);
    }

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