public <T> T getValue(Expression expression, Message<?> message, Class<T> desiredResultType)
			throws EvaluationException {
		Assert.notNull(expression, "Expression cannot be null");
		return expression.getValue(context, new MessageWrappedMessage(message), desiredResultType);
	}
Gets the value.

@param <T> the generic type
@param expression the expression
@param desiredResultType the desired result type
@return the value
@throws EvaluationException the evaluation exception
spring-xd-hadoop/src/main/java/org/springframework/xd/integration/hadoop/expression/MessageExpressionMethods.java