package org.kuali.common.util.log.log4j.model;
   
   import java.util.Collections;
   import java.util.List;
   
   import javax.xml.bind.annotation.XmlAttribute;
   
   import org.kuali.common.util.Assert;
   import org.kuali.common.util.nullify.NullUtils;
  
  public final class AppenderRef {
  
  	public static final List<AppenderRef> EMPTY = Collections.<AppenderRef> emptyList();
  
  	@XmlAttribute
  	private final String ref;
  
  	@SuppressWarnings("unused")
  	private AppenderRef() {
  		this(NullUtils.NONE);
  	}
  
  	public AppenderRef(String ref) {
  		Assert.noBlanks(ref);
  		this.ref = ref;
  	}
  
  	public String getRef() {
  		return ref;
  	}
  
  }