How do I set CSV header in camel DSL? - apache-camel

Question

I have one CSV file without header which is containing two value like
"lenovo","30000"
I want to set header in first row using camel DSL and pass it to another route, header is like:
"laptop","price"
My DSL route:
from("file:...?fileName=file1.csv&noop=true")
//Something I want to include string like this
.addLineInBody("laptop"+"price").append("\n")
.to("file:../?fileName=output.csv");
How can I do this in camel DSL?

Answer 1

I do not fully understand your header-problem. If you want to just prepend the CSV file with a static header a save it again as CSV you could simply use a Java bean to prepend the message body.
If you want to convert CSV to a data structure or vice versa you should check out the Camel CSV documentation: http://camel.apache.org/csv.html
Update:
You can write a java bean like this. The important part is the #Body Camel annotation to inject the message body into the method. See http://camel.apache.org/parameter-binding-annotations.html for more information about this.
Do the body manipulation as you like.
public class CsvHeaderEnricher {
public String enrichCsvHeader(#Body String messageBody) {
String enrichedBody = "YourHeader" + messageBody;
return enrichedBody;
}
}
Then you can call the bean in your route like this:
from("file:...?fileName=file1.csv&noop=true")
.bean(new CsvHeaderEnricher())
.to("file:../?fileName=output.csv");
You can also register the bean in the Spring context, autowire it into the Route class and use an instance variable instead of new
As long as your bean contains only one method, you don't need to tell Camel what method to use