package org.kuali.common.util.xml.jaxb.adapter;
   
   import javax.xml.bind.annotation.adapters.XmlAdapter;
   
   import org.kuali.common.util.Assert;
   
   public abstract class OmitStringAdapter extends XmlAdapter<String, String> {
   
   	public OmitStringAdapter(String omitString) {
  		Assert.notNull(omitString);
  		this.omitString = omitString;
  	}
  
  	private final String omitString;
  
  	@Override
  	public final String marshal(String string) {
  		if (omitString.equals(string)) {
  			return null;
  		} else {
  			return string;
  		}
  	}
  
  	@Override
  	public final String unmarshal(String string) {
  		if (string == null) {
  			return omitString;
  		} else {
  			return string;
  		}
  	}
  
  	public final String getOmitString() {
  		return omitString;
  	}
  
  }