Examples of com.volantis.xml.expression.Expression

com.volantis.xml.expression.Expression
A parsed expression.
Warning: This is a facade provided for use by user code, not for implementation in user code.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.

Implementations of this interface must be thread safe and must not maintain any evaluation specific state as they may be evaluated simultaneously by multiple threads.

Expressions must have no context specific information in them. Where it is necessary to refer to named items the names must be stored as QNames which are expanded at evaluation time. This means that a given string will always result in the same Expression expression no matter where it is used.
@volantis-api-include-in PublicAPI @volantis-api-include-in ProfessionalServicesAPI @volantis-api-include-in InternalAPI

    /**
     * Test invoke with a missing entity and no default.
     * @throws Exception
     */
    public void testInvokeMissing() throws Exception {
        Expression expression = parser.parse(getFunctionQName() + "('name')");


        addSingleValueExpectations("name", null);


        Value result = expression.evaluate(expressionContext);


        assertTrue("Result not a sequence",
                   result instanceof Sequence);
        assertTrue("Result sequence not empty",
                   ((Sequence)result).getLength() == 0);

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    /**
     * Test invoke with a missing entity and a String default.
     * @throws Exception
     */
    public void testInvokeMissingStringDefault() throws Exception {
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'value')");


        addSingleValueExpectations("name", null);


        Value result = expression.evaluate(expressionContext);


        assertEquals("Result not as",
                     "value",
                     result.stringValue().asJavaString());
    }

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    /**
     * Test invoke with a missing entity and a numeric default.
     * @throws Exception
     */
    public void testInvokeMissingNumericDefault() throws Exception {
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 2)");


        addSingleValueExpectations("name", null);


        Value result = expression.evaluate(expressionContext);


        assertEquals("Result not as",
                     "2", // Numerics represent as floating
                     result.stringValue().asJavaString());
    }

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     * Sub-classes must perform additional setup for this test
     * by overriding setUpInvokeHeaderIgnoreDefault.
     * @throws Exception
     */
    public void testInvokeIgnoreDefault() throws Exception {
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'fred')");


        addSingleValueExpectations("name", "value");


        Value result = expression.evaluate(expressionContext);


        assertEquals("Result not as",
                     "value",
                     result.stringValue().asJavaString());
    }

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     * Test that the function can be evaluated with a [1] predicate
     * @throws Exception if an error occurs
     */
    public void testInvokeWithNumericPredicate() throws Exception {
        // parse the expression
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'default')[1]");


        // register the name value pair with the request
        addSingleValueExpectations("name", "value");


        // evaluate the expression
        Value result = expression.evaluate(expressionContext);


        // ensure that the correct value was returned
        assertEquals("Unexpected value returned",
                     "value",
                     result.stringValue().asJavaString());

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     * is specified and no name value pair has been added to the request
     * @throws Exception if an error occurs
     */
    public void testInvokeWithNumericPredicateDefaUlt() throws Exception {
        // parse the expression
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'default')[1]");


        addSingleValueExpectations("name", null);


        // evaluate the expression
        Value result = expression.evaluate(expressionContext);


        // ensure that the correct value was returned
        assertEquals("Unexpected value returned",
                     "default",
                     result.stringValue().asJavaString());

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     * is specified
     * @throws Exception if an error occurs
     */
    public void testInvokeWithNumericPredicateOutOfBounds() throws Exception {
        // parse the expression
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'default')[2]");


        addSingleValueExpectations("name", null);


        // evaluate the expression
        Value result = expression.evaluate(expressionContext);


        assertTrue("Result was not a Sequence instance",
                   result instanceof Sequence);


        Sequence sequence = (Sequence)result;

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     * is specified and default is provided via constructor
     * @throws Exception if an error occurs
     */
    public void testDefaultInvokeWithNumericPredicateOutOfBounds() throws Exception {
        // parse the expression
        Expression expression = parser.parse(getFunctionQName() +
            "('name', 'default')[2]");


        // register the name value pair with the request
        addSingleValueExpectations("name", "value");


        // evaluate the expression
        Value result = expression.evaluate(expressionContext);


        assertTrue("Result was not a Sequence instance",
                   result instanceof Sequence);


        Sequence sequence = (Sequence)result;

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     * @return the Value resulting from evaluating the expression
     * @throws ExpressionException if an error occurs
     */
    protected Value evaluateExpression() throws ExpressionException  {
        // create an expression
        Expression expression = parser.parse(getFunctionQName() +
                                             "('TestDevice')");


        // evalute the expression
        return expression.evaluate(expressionContext);
    }

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     * Test invoke with a missing entity and no default.
     *
     * @throws Exception
     */
    public void testInvokeMissing() throws Exception {
        Expression expression = parser.parse(getFunctionQName() + "('name')");


        formatReferenceFinderMock.expects
                .getFormatReference("name", new int[]{})
                .returns(formatReferenceMock);

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