Package org.apache.camel

Examples of org.apache.camel.Expression.evaluate()

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        // the result is either the result of the expression or the input stream as-is because its binary content
        Object result;
        if (exp != null) {
            try {
                result = exp.evaluate(exchange, Object.class);
                log.debug("Evaluated expression as: {} with: {}", result, exchange);
            } finally {
                if (!getEndpoint().isCacheScript()) {
                    // some languages add themselves as a service which we then need to remove if we are not cached
                    ServiceHelper.stopService(exp);
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                    // use simple language to evaluate the expression, as it may use the simple language to refer to message body, headers etc.
                    Expression expression = null;
                    try {
                        expression = exchange.getContext().resolveLanguage("simple").createExpression(exp);
                        parameterValue = expression.evaluate(exchange, Object.class);
                        // use "null" to indicate the expression returned a null value which is a valid response we need to honor
                        if (parameterValue == null) {
                            parameterValue = "null";
                        }
                    } catch (Exception e) {
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             */
            private Object evaluateParameterBinding(Exchange exchange, Expression expression, int index, Class<?> parameterType) {
                Object answer = null;

                // use object first to avoid type conversion so we know if there is a value or not
                Object result = expression.evaluate(exchange, Object.class);
                if (result != null) {
                    // we got a value now try to convert it to the expected type
                    try {
                        answer = exchange.getContext().getTypeConverter().mandatoryConvertTo(parameterType, result);
                        if (LOG.isTraceEnabled()) {
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        predicate = SimpleLanguage.predicate("${header.bar} == 124");
        assertFalse(predicate.matches(exchange));

        Expression expression = SimpleLanguage.expression("${body}");
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${body}");
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));
        expression = SimpleLanguage.simple("${body}", String.class);
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));
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        Expression expression = SimpleLanguage.expression("${body}");
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${body}");
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));
        expression = SimpleLanguage.simple("${body}", String.class);
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${header.bar} == 123", boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
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        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${body}");
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));
        expression = SimpleLanguage.simple("${body}", String.class);
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${header.bar} == 123", boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
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        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));
        expression = SimpleLanguage.simple("${body}", String.class);
        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${header.bar} == 123", boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 123", Boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", Boolean.class);
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        assertEquals("<hello id='m123'>world!</hello>", expression.evaluate(exchange, String.class));

        expression = SimpleLanguage.simple("${header.bar} == 123", boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 123", Boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", Boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
    }
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        expression = SimpleLanguage.simple("${header.bar} == 123", boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 123", Boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", Boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
    }

    public void testResultType() throws Exception {
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        expression = SimpleLanguage.simple("${header.bar} == 124", boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 123", Boolean.class);
        assertEquals(Boolean.TRUE, expression.evaluate(exchange, Object.class));
        expression = SimpleLanguage.simple("${header.bar} == 124", Boolean.class);
        assertEquals(Boolean.FALSE, expression.evaluate(exchange, Object.class));
    }

    public void testResultType() throws Exception {
        assertEquals(123, SimpleLanguage.simple("${header.bar}", int.class).evaluate(exchange, Object.class));
        assertEquals("123", SimpleLanguage.simple("${header.bar}", String.class).evaluate(exchange, Object.class));
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