How to avoid splitting headerLines?

[ulsa]

I want to write a CSV file using FlatFileItemWriter, but my headerLines property ("ITEM_NO,ITEM_NAME") gets split into two header lines. I want them to be a single line.

It's the default String array propertyeditor that does it, I guess. How can I avoid this? Can I access the registrar and remove this particular editor?

I'm using 1.1.4.

[Dave Syer]

You should be able to set the property as an explicit <list><value>...</value></list> - that way the property editor will not try and convert the value.

[ulsa]

You're right, using <list> instead of <value> for the headerLines property solves the problem.

Before:

	<bean id="myFlatFileWriter"
		class="org.springframework.batch.item.file.FlatFileItemWriter">
		<property name="resource" value="file:target/test-outputs/my-data.csv" />
		<property name="headerLines" value="ITEM_NO,ITEM_NAME" />
		<property name="fieldSetCreator" ref="myFieldSetCreator" />
	</bean>

The headerLines property value is interpreted as a String[] and is split into two lines, which results in this incorrect my-date.csv file:

ITEM_NO
ITEM_NAME
00012345,Some text

After:

	<bean id="myFlatFileWriter"
		class="org.springframework.batch.item.file.FlatFileItemWriter">
		<property name="resource" value="file:target/test-outputs/my-data.csv" />
		<property name="headerLines">
			<list>
				<value>ITEM_NO,ITEM_NAME</value>
			</list>
		</property>
		<property name="fieldSetCreator" ref="myFieldSetCreator" />
	</bean>

The headerLines property value is interpreted as a List and is kept as a single line, which results in this my-date.csv file:

ITEM_NO,ITEM_NAME
00012345,Some text

It was not immediately obvious, at least not to me. Even though the headerLines property is of type List, the only setter for headerLines takes a String[]. I guess Spring does some property setting magic under the covers.