Package org.apache.camel.spi

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

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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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            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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        if (expression.contains("$")) {
            language = getCamelContext().resolveLanguage("file");
        } else {
            language = getCamelContext().resolveLanguage("constant");
        }
        return language.createExpression(expression);
    }

    /**
     * Creates the associated name of the done file based on the given file name.
     * <p/>
 
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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 Expression createExpression(RouteContext routeContext) {
        if (expressionValue == null) {
            CamelContext camelContext = routeContext.getCamelContext();
            Language language = camelContext.resolveLanguage(getLanguage());
            expressionValue = language.createExpression(getExpression());
        }
        return expressionValue;
    }

    public String getExpression() {
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    public void testExpression() throws Exception {
        Exchange exchange = new DefaultExchange(context);
        exchange.getIn().setBody(new File("src/test/resources/books.json"));

        Language lan = context.resolveLanguage("jsonpath");
        Expression exp = lan.createExpression("$.store.book[*].author");
        List<?> authors = exp.evaluate(exchange, List.class);
        log.info("Authors {}", authors);

        assertNotNull(authors);
        assertEquals(2, authors.size());
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    }

    private static GenericFileExpressionRenamer<File> getDefaultCommitRenamer(CamelContext context) {
        // use context to lookup language to let it be loose coupled
        Language language = context.resolveLanguage("file");
        Expression expression = language.createExpression("${file:parent}/.camel/${file:onlyname}");
        return new GenericFileExpressionRenamer<File>(expression);
    }

    @SuppressWarnings("unchecked")
    private static GenericFileExclusiveReadLockStrategy<File> getExclusiveReadLockStrategy(Map<String, Object> params) {
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        if (expression.contains("$")) {
            language = getCamelContext().resolveLanguage("file");
        } else {
            language = getCamelContext().resolveLanguage("constant");
        }
        return language.createExpression(expression);
    }

    /**
     * Creates the associated name of the done file based on the given file name.
     * <p/>
 
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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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