Re: [Simple-support] Check for empty element

[Niall G. <gal...@ya...>]

You would have to write a converter (see org.simpleframework.xml.convert.Converter). StAX, DOM and XmlPull (the XML parsers that can be used by simple) can not tell the difference between <DROP/> and <DROP></DROP> so it has to be null rather than an empty string.

--- On Fri, 17/5/13, Joël Craenhals <jo...@cr...> wrote:

From: Joël Craenhals <jo...@cr...>
Subject: [Simple-support] Check for empty element
To: sim...@li...
Received: Friday, 17 May, 2013, 11:57 AM

Hello,
I'm trying to deserialize an IPTables XML configuration file. In the file there is a part like this:
      <rule >       <actions>        <DROP  />       </actions>
      </rule>
The empty element inside the actions element can be one of these four: <DROP /> or <ACCEPT /> or <RETURN /> or <QUEUE />
When reading in the XML file, I have a Java class Rule.java like this:
package model;
import java.io.Serializable;
import org.simpleframework.xml.Element;import org.simpleframework.xml.Root;
@Root(name = "rule")public class Rule implements Serializable {	private static final long serialVersionUID = 1L;
	@Element(name = "actions", required = true)	private Actions action;
}
The actions class looks like this:
package model;
import org.simpleframework.xml.Element;import org.simpleframework.xml.Root;import org.simpleframework.xml.convert.Convert;
@Root(name = "actions", strict = false)public class Actions {	@Element(name = "DROP", required = false)	private String aDrop;
	@Element(name = "ACCEPT", required = false)	private String aAccept;
	@Element(name = "QUEUE", required = false)	private String aQueue;
	@Element(name = "RETURN", required = false)	private String aReturn;
	public String toString() {		if (aDrop != null) {			return "DROP";		} else if (aAccept != null) {			return "ACCEPT";		} else if (aQueue != null) {			return "QUEUE";		} else if (aReturn != null) {			return "RETURN";		} else {			return "NOTHING";		}	}}
I want to check which element was present inside the actions element.However all the attributes of the Actions class stay NULL.
What am I doing wrong?
Thanks in advance.
Joël Craenhals

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