TypeOr.java

package net.sf.jabref.util;

/**
 * This little contraption is used if a generic type is needed that is either a
 * S or a T.
 * 
 * @author oezbek
 * 
 * @param <S>
 * @param <T>
 */
public class TypeOr<S, T> {

	public S s;

	public T t;

	public TypeOr(S s, T t) {
		if (!(s == null ^ t == null))
			throw new IllegalArgumentException("Either s or t need to be null");

		this.s = s;
		this.t = t;
	}

	public boolean isS() {
		return s != null;
	}

	public boolean isT() {
		return t != null;
	}

}