[FELIX-5401] Can't override default configuration type map value using an empty map

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: org.apache.felix.dependencymanager-r8
• Fix Version/s: org.apache.felix.dependencymanager-r9
• Component/s: Dependency Manager
• Assignee: Pierre De Rop
• Reporter: Pierre De Rop
• Created: 06/Nov/16 23:04
• Updated: 06/Nov/16 23:08
• Resolved: 06/Nov/16 23:08

Description

Assume you are using the following configuration type:

    public interface MyConfig {
        public default SortedMap<String, String> getMap() { 
        	SortedMap<String, String> defaultMap = new TreeMap<>();
        	defaultMap.put("key1", "default1");
        	defaultMap.put("key2", "default2");
        	return defaultMap;
        }        
    }

So, you can then declare the following values in the actual configuration dictionary for the "map" key:

map.key1=value1
map.key2=value2
...

or

map={key1.value1, key2.value2}

But assuming that you now want to register in config admin a configuration dictionary with an empty map for the "map" key: it is not currently possible, because if you don't declare any values for the "map" key, then the default value of the configuration type will be returned (see FELIX-5399).

And if you declare the following value for the "map" key:

map={}

then it does not work too because the "toMap" method in the Configurable.java class does not check empty "{}" declaration.