001    package railo.runtime.sql.exp;
002    
003    public interface Expression {
004            public void setIndex(int index);
005            public int getIndex();
006            public String getAlias();
007            public void setAlias(String alias);
008            public boolean hasAlias();
009            public boolean hasIndex();
010            
011            public String toString(boolean noAlias);
012            public void setDirectionBackward(boolean b);
013            public boolean isDirectionBackward();
014    }