001/* Copyright (C) 2013 TU Dortmund
002 * This file is part of AutomataLib, http://www.automatalib.net/.
003 * 
004 * AutomataLib is free software; you can redistribute it and/or
005 * modify it under the terms of the GNU Lesser General Public
006 * License version 3.0 as published by the Free Software Foundation.
007 * 
008 * AutomataLib is distributed in the hope that it will be useful,
009 * but WITHOUT ANY WARRANTY; without even the implied warranty of
010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
011 * Lesser General Public License for more details.
012 * 
013 * You should have received a copy of the GNU Lesser General Public
014 * License along with AutomataLib; if not, see
015 * http://www.gnu.de/documents/lgpl.en.html.
016 */
017package net.automatalib.commons.util.strings;
018
019import java.io.IOException;
020
021/**
022 * Abstract base class for printables.
023 * 
024 * Besides implementing the {@link Printable} interface, it provides a
025 * standard {@link #toString()} implementation using a {@link StringBuilder}
026 * and the {@link #print(Appendable)} method.
027 * 
028 * @author Malte Isberner <malte.isberner@gmail.com>
029 *
030 */
031public abstract class AbstractPrintable implements Printable {
032        
033        public static String toString(Printable p) {
034                StringBuilder sb = new StringBuilder();
035                try {
036                        p.print(sb);
037                }
038                catch(IOException e) {
039                        throw new IllegalStateException("Unexpected IOException thrown during operation on StringBuilder.", e);
040                        // THIS SHOULD NOT HAPPEN
041                        // since the StringBuilder methods do not throw.
042                }
043                return sb.toString();
044        }
045        
046        
047        /*
048         * (non-Javadoc)
049         * @see java.lang.Object#toString()
050         */
051        @Override
052        public String toString() {
053                return toString(this);
054        }       
055}