Examples of org.apache.camel.support.ExpressionAdapter

org.apache.camel.support.ExpressionAdapter
A helper class for developers wishing to implement an {@link org.apache.camel.Expression}using Java code with a minimum amount of code to write so that the developer only needs to implement one of the {@link #evaluate(org.apache.camel.Exchange,Class)} or{@link #evaluate(org.apache.camel.Exchange)} methods. @version


    /**
     * Returns the expression for the out messages body
     */
    public static Expression outBodyExpression() {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                if (exchange.hasOut()) {
                    return exchange.getOut().getBody();
                } else {
                    return null;

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    /**
     * Returns the expression for the exchanges outbound message body converted
     * to the given type
     */
    public static <T> Expression outBodyExpression(final Class<T> type) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                if (exchange.hasOut()) {
                    return exchange.getOut().getBody(type);
                } else {
                    return null;

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    /**
     * Returns the expression for the fault messages body
     */
    public static Expression faultBodyExpression() {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                return exchange.getOut().isFault() ? exchange.getOut().getBody() : null;
            }


            @Override

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    /**
     * Returns the expression for the exchanges fault message body converted
     * to the given type
     */
    public static <T> Expression faultBodyExpression(final Class<T> type) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                return exchange.getOut().isFault() ? exchange.getOut().getBody(type) : null;
            }


            @Override

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    /**
     * Returns the expression for the exchange
     */
    public static Expression exchangeExpression() {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                return exchange;
            }


            @Override

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    /**
     * Returns the expression for the IN message
     */
    public static Expression inMessageExpression() {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                return exchange.getIn();
            }


            @Override

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    /**
     * Returns the expression for the OUT message
     */
    public static Expression outMessageExpression() {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                return exchange.getOut();
            }


            @Override

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    /**
     * Returns an expression which converts the given expression to the given type
     */
    public static Expression convertToExpression(final Expression expression, final Class<?> type) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                if (type != null) {
                    return expression.evaluate(exchange, type);
                } else {
                    return expression;

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    /**
     * Returns an expression which converts the given expression to the given type the type
     * expression is evaluated to
     */
    public static Expression convertToExpression(final Expression expression, final Expression type) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                Object result = type.evaluate(exchange, Object.class);
                if (result != null) {
                    return expression.evaluate(exchange, result.getClass());
                } else {

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     * Returns a tokenize expression which will tokenize the string with the
     * given token
     */
    public static Expression tokenizeExpression(final Expression expression,
                                                final String token) {
        return new ExpressionAdapter() {
            public Object evaluate(Exchange exchange) {
                Object value = expression.evaluate(exchange, Object.class);
                Scanner scanner = ObjectHelper.getScanner(exchange, value);
                scanner.useDelimiter(token);
                return scanner;

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