[CONFIGURATION-446] XMLConfiguration removes empty attributes on update

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6
• Fix Version/s: 1.7
• Assignee: Oliver Heger
• Reporter: Ghislain Delépine
• Created: 15/Apr/11 08:46
• Updated: 08/Sep/11 09:20
• Resolved: 20/Apr/11 20:16

Description

Consider an XML configuration file config.xml containing:

<configuration>
<foo attr="aValue">
</foo>
</configuration>

Update the configuration to set an attribute to empty:

XMLConfiguration config = new XMLConfiguration("config.xml");
config.setExpressionEngine(new XPathExpressionEngine());

config.setProperty("foo/@attr", "");
config.save();

The file has been modified as follows:

<configuration>
<foo/>
</configuration>

The attribute shouldn't be removed as an empty attribute is different from a missing attribute.

Method removing the attribute: XMLConfiguration$XMLBuilderVisitor.updateAttribute(Node node, Element elem, String name, char listDelimiter)