Examples of com.volantis.xml.expression.ExpressionParser

com.volantis.xml.expression.ExpressionParser
An expression parser is used to parse inputs to generate {@link Expression}s.
Warning: This is a facade provided for use by user code, not for implementation in user code.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

        if (expr == null) {
            forwardError(dynamicProcess,
                    "'expr' attribute must be specified on " + element);
        } else {
            ExpressionFactory factory = ExpressionFactory.getDefaultInstance();
            ExpressionParser parser = factory.createExpressionParser();
            try {
                // Parse, and evaluate the expression.
                Expression expression = parser.parse(expr);
                Value value = expression.evaluate(context);


                // Stream the value's contents into the process following the
                // dynamic process. Don't do it into the dynamic process as
                // that will cause any markup to get reevaluated.

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        // initalize the parser that will be use to parse XPath expressions
        XMLPipelineFactory pipelineFactory =
                getPipelineContext().getPipelineFactory();
        ExpressionFactory expressionFactory =
                pipelineFactory.getExpressionFactory();
        ExpressionParser parser = expressionFactory.createExpressionParser();


        // create a process that can evaluate expressions
        ExpressionProcess expressionProcess = createExpressionProcess(parser);


        DISelectConditionalProcess diSelectProcess = new DISelectConditionalProcess(parser);

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     * Tests the createParser() method 
     * @throws Exception if an  error is encountered
     */ 
    public void testCreateParser() throws Exception {
        // ensure the correct object is created        
        ExpressionParser parser = factory.createExpressionParser();
        assertTrue("JXPathExpressionFactory createParser() should create " +
                   "JXPathExpressionParser instance", 
                   (parser instanceof JXPathExpressionParser));
    }

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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();
        } catch (ExpressionException e) {
            throw new ExtendedSAXException(e);
        }

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                "invalid-num-of-args",
                new Object[]{NAME, 1, arguments.length}));
        }


        ExpressionFactory expressionFactory = context.getFactory();
        ExpressionParser parser = expressionFactory.createExpressionParser();


        Expression expression = parser.parse(arguments[0].stringValue().asJavaString());
        return expression.evaluate(context);
    }

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        // If we got her it is not a vlaid component name
        return valid;
    }


    public RuntimePolicyReferenceExpression parseUnquotedExpression(String unquotedExpression) {
        ExpressionParser parser = getExpressionParser();


        Expression expression;
        try {
            expression = parser.parse(unquotedExpression);
        } catch (ExpressionException e) {
            throw new ExtendedRuntimeException(e);
        }


        RuntimeProject project = projectProvider.getCurrentProject();

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        if (expressionContext != null) {
            ExpressionFactory expressionFactory =
                expressionContext.getFactory();


            ExpressionParser parser =
                expressionFactory.createExpressionParser();


            result = parser.parse(expression);
        } else {
            logger.warn("missing-expression-context");
        }


        return result;

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Related Classes of com.volantis.xml.expression.ExpressionParser

com.volantis.mcs.expression.MCSExpressionHelper

com.volantis.mcs.runtime.policies.expression.PolicyExpressionParserImpl

com.volantis.xml.expression.functions.pipeline.EvaluateFunction

com.volantis.xml.expression.impl.jxpath.JXPathExpressionFactoryTestCase

com.volantis.xml.pipeline.sax.impl.dynamic.SimpleDynamicProcess

com.volantis.xml.pipeline.sax.impl.operations.value.ValueOfRule

com.volantis.xml.pipeline.sax.operations.foreach.ForEachRule

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