001 /* 002 * Copyright (C) 2012 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.text; 021 022 public interface LineReader { 023 024 /** 025 * Returns true if the renderer has a next line to render. 026 * 027 * @return when there is at least a next line to read 028 */ 029 boolean hasLine(); 030 031 /** 032 * Renders the element. 033 * 034 * @param to the buffer for rendering 035 * @throws IllegalStateException when there is no line to render 036 */ 037 void renderLine(RenderAppendable to) throws IllegalStateException; 038 039 }