[CONFIGURATION-733] Attribute value cannot delimit to list

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4
• Flags: Important
• Assignee: Unassigned
• Reporter: Hao Chen
• Created: 07/Jan/19 07:21
• Updated: 19/Jul/19 14:16

Description

Given the following configuration XML:

<configuration>
  <header>
    <result throwExceptionOnMissing="true">
      <listDelimiterHandler config-class="org.apache.commons.configuration2.convert.DefaultListDelimiterHandler">
        <config-constrarg config-value=","/>
      </listDelimiterHandler>
    </result>
  </header>
     <node type="test" types="a,b,c"/>
</configuration>

With the following test code:

            Parameters params = new Parameters();
            ReloadingFileBasedConfigurationBuilder<XMLConfiguration> builder = new ReloadingFileBasedConfigurationBuilder<XMLConfiguration>(XMLConfiguration.class);
            builder.configure(params.xml().setFile(file).setListDelimiterHandler(new DefaultListDelimiterHandler(',')));
            XMLConfiguration configuration = builder.getConfiguration();

        List<String> types = configuration.getList(String.class, "node[@types]");
        // result WRONG – returns ["a,b,c"]
        org.junit.Assert.assertEquals(types.size(), 3);

I just couldn't find any way to get the attribute value as a comma-delimited list...

In general, the default behavior change for list delimiter is a big headache while we are trying to upgrade to commons-configuration2...