public  void addTerm(Term term) 
{
	
		terms.add(term);
}

Adds a term to the list of acceptable terms

 public BitSet bits(IndexReader reader) throws IOException 
{
		BitSet result=new BitSet(reader.maxDoc());
        TermDocs td = reader.termDocs();
        try
        {
            for (Iterator iter = terms.iterator(); iter.hasNext();)
            {
                Term term = (Term) iter.next();
                td.seek(term);
                while (td.next())
                {
                    result.set(td.doc());
                }
            }
        }
        finally
        {
            td.close();
        }
        return result;
}

 public boolean equals(Object obj) 
{
		if(this == obj)
			return true;
		if((obj == null) || (obj.getClass() != this.getClass()))
				return false;
		TermsFilter test = (TermsFilter)obj;
		return (terms == test.terms ||
					 (terms != null && terms.equals(test.terms)));
}

 public DocIdSet getDocIdSet(IndexReader reader) throws IOException 
{
    OpenBitSet result=new OpenBitSet(reader.maxDoc());
        TermDocs td = reader.termDocs();
        try
        {
            for (Iterator iter = terms.iterator(); iter.hasNext();)
            {
                Term term = (Term) iter.next();
                td.seek(term);
                while (td.next())
                {
                    result.set(td.doc());
                }
            }
        }
        finally
        {
            td.close();
        }
        return result;
}

 public int hashCode() 
{
		int hash=9;
		for (Iterator iter = terms.iterator(); iter.hasNext();)
		{
			Term term = (Term) iter.next();
			hash = 31 * hash + term.hashCode();			
		}
		return hash;
}