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Warning: This is a facade provided for use by user code, not for implementation in user code.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 the boolean function with an invalid String value argument.
     * @throws Exception if an error occurs
     */
    public void testBooleanStringInvalidString() throws Exception {
        try {
            Expression exp = compileExpression("boolean(\"hello\")");
            exp.evaluate(context);
            fail("boolean(\"hello\") should throw an exception");
        } catch (ExpressionException e) {
            // expected condition
        }
    }

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    /**
     * Test the boolean function with a numeric argument.
     * @throws Exception if an error occurs
     */
    public void testBooleanNumericArg() throws Exception {
        Expression exp = compileExpression("boolean(0.0)");


        Value result = exp.evaluate(context);


        assertTrue("fn:boolean should result in a boolean value",
                   result instanceof BooleanValue);


        assertFalse("fn:boolean expression result should be false",

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    /**
     * Test the number function with a numeric argument.
     * @throws Exception if an error occurs
     */
    public void testNumberNumericArg() throws Exception {
        Expression exp = compileExpression("number(0.0)");


        Value result = exp.evaluate(context);


        assertTrue("fn:number should result in a double value",
                   result instanceof DoubleValue);


        assertEquals("fn:number expression result should be 0.0",

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    /**
     * Test the number function with a String argument.
     * @throws Exception if an error occurs
     */
    public void testNumberStringArg() throws Exception {
        Expression exp = compileExpression("number('99.9')");


        Value result = exp.evaluate(context);


        assertTrue("fn:number should result in a double value",
                   result instanceof DoubleValue);


        assertEquals("fn:number expression result should be 99.9",

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    /**
     * Test the number function with a Boolean argument.
     * @throws Exception if an error occurs
     */
    public void testNumberBooleanArg() throws Exception {
        Expression exp = compileExpression("number(true())");


        Value result = exp.evaluate(context);


        assertTrue("fn:number should result in a double value",
                   result instanceof DoubleValue);


        assertEquals("fn:number expression result should be 1.0",

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    /**
     * Test the number function with an invalid argument.
     * @throws Exception if an error occurs
     */
    public void testNumberInvalidArg() throws Exception {
        Expression exp = compileExpression("number('one')");


        Value result = exp.evaluate(context);


        assertTrue("fn:number should result in a Double value",
                   result instanceof DoubleValue);


        assertTrue("fn:number expression result should be NaN",

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    /**
     * Test the concat function with two string args
     * @throws Exception if an error occurs
     */
    public void testConcatTwoStringArgs() throws Exception {
        Expression exp = compileExpression("concat('con', 'cat')");


        Value result = exp.evaluate(context);


        assertTrue("fn:concat should result in a String value",
                   result instanceof StringValue);


        assertEquals("fn:concat expression result should be concat",

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    /**
     * Test the concat function with five string args
     * @throws Exception if an error occurs
     */
    public void testConcatFiveStringArgs() throws Exception {
        Expression exp = compileExpression("concat('ex','pres','s','ion','s')");


        Value result = exp.evaluate(context);


        assertTrue("fn:concat should result in a String value",
                   result instanceof StringValue);


        assertEquals("fn:concat expression result should be expressions",

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        context.getCurrentScope().declareVariable(
                        new ImmutableExpandedName("", "singleSeq"),
                        factory.createSequence(new Item[]
                        {factory.createStringValue("one")}));


        Expression exp = compileExpression(
                "concat(true(), 25.9, $emptySeq, $myVar, $singleSeq)");


        Value result = exp.evaluate(context);


        assertTrue("fn:concat should result in a String value",
                   result instanceof StringValue);


        assertEquals("fn:concat expression result should be 'true25.91one'",

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    /**
     * Test the concat function with a single argument
     * @throws Exception if an error occurs
     */
    public void testConcatOneArg() throws Exception {
        Expression exp = compileExpression("concat('con')");


        try {
            exp.evaluate(context);
            fail("calling concat with a single argument should result " +
                 "in an ExpressionException");
        } catch (ExpressionException e) {
            // expected condition
        }

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