Package org.apache.camel.spi

Examples of org.apache.camel.spi.Language.createExpression()

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            public Object evaluate(Exchange exchange) {
                // resolve language using context to have a clear separation of packages
                // must call evaluate to return the nested language evaluate when evaluating
                // stacked expressions
                Language language = exchange.getContext().resolveLanguage("simple");
                return language.createExpression(expression).evaluate(exchange, Object.class);
            }

            @Override
            public String toString() {
                return "simple(" + expression + ")";
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            public Object evaluate(Exchange exchange) {
                // resolve language using context to have a clear separation of packages
                // must call evaluate to return the nested language evaluate when evaluating
                // stacked expressions
                Language language = exchange.getContext().resolveLanguage("bean");
                return language.createExpression(expression).evaluate(exchange, Object.class);
            }

            @Override
            public String toString() {
                return "bean(" + expression + ")";
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        return "simple";
    }

    protected void assertExpressionResultInstanceOf(String expressionText, Class<?> expectedType) {
        Language language = assertResolveLanguage(getLanguageName());
        Expression expression = language.createExpression(expressionText);
        assertNotNull("Cannot assert type when no type is provided", expectedType);
        assertNotNull("No Expression could be created for text: " + expressionText + " language: " + language, expression);
        Object answer = expression.evaluate(exchange, Object.class);
        assertIsInstanceOf(expectedType, answer);
    }
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        return "simple";
    }

    protected void assertExpressionResultInstanceOf(String expressionText, Class<?> expectedType) {
        Language language = assertResolveLanguage(getLanguageName());
        Expression expression = language.createExpression(expressionText);
        assertNotNull("Cannot assert type when no type is provided", expectedType);
        assertNotNull("No Expression could be created for text: " + expressionText + " language: " + language, expression);
        Object answer = expression.evaluate(exchange, Object.class);
        assertIsInstanceOf(expectedType, answer);
    }
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     * given value on a specific exchange
     */
    protected void assertExpression(Exchange exchange, String languageName, String expressionText, Object expectedValue) {
        Language language = assertResolveLanguage(languageName);

        Expression<Exchange> expression = language.createExpression(expressionText);
        assertNotNull("No Expression could be created for text: " + expressionText + " language: " + language, expression);

        assertExpression(expression, exchange, expectedValue);
    }

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        return "simple";
    }

    protected void assertExpressionResultInstanceOf(String expressionText, Class<?> expectedType) {
        Language language = assertResolveLanguage(getLanguageName());
        Expression expression = language.createExpression(expressionText);
        assertNotNull("Cannot assert type when no type is provided", expectedType);
        assertNotNull("No Expression could be created for text: " + expressionText + " language: " + language, expression);
        Object answer = expression.evaluate(exchange, Object.class);
        assertIsInstanceOf(expectedType, answer);
    }
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public class SqlLanguageTest extends SqlTest {

    public void testExpression() throws Exception {
        Language language = assertResolveLanguage(getLanguageName());

        Expression expression = language.createExpression("SELECT * FROM org.apache.camel.builder.sql.Person where city = 'London'");       
        Object value = expression.evaluate(exchange);
        assertIsInstanceOf(List.class, value);

        List list = (List)value;
        assertEquals("List size", 2, list.size());
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    @SuppressWarnings("unchecked")
    public void testExpressionWithHeaderVariable() throws Exception {
        Language language = assertResolveLanguage(getLanguageName());

        Expression expression = language.createExpression("SELECT * FROM org.apache.camel.builder.sql.Person where name = :fooHeader");
        Object value = expression.evaluate(exchange);
        assertIsInstanceOf(List.class, value);
        List<Person> list = (List<Person>)value;
        assertEquals("List size", 1, list.size());

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    public static Expression languageExpression(final String language, final String expression) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                Language lan = exchange.getContext().resolveLanguage(language);
                if (lan != null) {
                    return lan.createExpression(expression).evaluate(exchange, Object.class);
                } else {
                    throw new NoSuchLanguageException(language);
                }
            }
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            public Object evaluate(Exchange exchange) {
                // resolve language using context to have a clear separation of packages
                // must call evaluate to return the nested language evaluate when evaluating
                // stacked expressions
                Language language = exchange.getContext().resolveLanguage("simple");
                return language.createExpression(expression).evaluate(exchange, Object.class);
            }

            @Override
            public String toString() {
                return "simple(" + expression + ")";
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