[LUCENE-5479] Make default dimension config in FacetConfig adjustable

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.8, 6.0
• Component/s: modules/facet
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Rob Audenaerde
• Created: 27/Feb/14 12:37
• Updated: 28/Aug/22 14:01
• Resolved: 01/Mar/14 11:46

Description

Now it is hardcoded to DEFAULT_DIM_CONFIG. This may be useful for most standard approaches.

However, I use lots of facets. These facets can be multivalued, I do not know that on beforehand. So what I would like to do is to change the default config to mulitvalued = true.

Currently I have a working, but rather ugly workaround that subclasses FacetConfig, like this:

CustomFacetConfig.java

public class CustomFacetsConfig extends FacetsConfig
{
	public final static DimConfig DEFAULT_D2A_DIM_CONFIG = new DimConfig();
	static
	{
		DEFAULT_D2A_DIM_CONFIG.multiValued = true;
	}

	@Override
	public synchronized DimConfig getDimConfig( String dimName )
	{
		DimConfig ft = super.getDimConfig( dimName );

		if ( DEFAULT_DIM_CONFIG.equals( ft ) )
		{
			return DEFAULT_D2A_DIM_CONFIG;
		}
		return ft;
	}
}

I created a patch to illustrate what I would like to change. By making a protected method it is easier to create a custom subclass of FacetConfig.

Also, maybe there are better way to accomplish my goal (easy default to multivalue?)