int result = 1;
        result = prime * result;
        for ( GroupMatcher matcher : getMatchers() )
        {
            result += matcher.hashCode();
        }
        return result;
    }

    @Override
    public boolean equals( Object obj )
    {
        if ( this == obj )
        {
            return true;
        }
        if ( obj == null )
        {
            return false;
        }
        if ( getClass() != obj.getClass() )
        {
            return false;
        }
        AndGroupMatcher other = (AndGroupMatcher) obj;
        if ( !getMatchers().equals( other.getMatchers() ) )
        {
            return false;
        }
        return true;
    }

}