001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2013 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.messaging.jmf.codec.std.impl;
022
023import org.granite.messaging.jmf.JMFEncodingException;
024import org.granite.messaging.jmf.codec.StandardCodec;
025
026/**
027 * @author Franck WOLFF
028 */
029public abstract class AbstractStandardCodec<T> implements StandardCodec<T> {
030        
031        protected JMFEncodingException newBadTypeJMFEncodingException(int jmfType, int parameterizedJmfType) {
032                return new JMFEncodingException(
033                        "Bad JMF type for " + getClass().getName() + ": " + jmfType +
034                        " (parameterized: " + parameterizedJmfType + ")"
035                );
036        }
037        
038        protected String escape(String s) {
039                if (s == null || s.length() == 0)
040                        return s;
041                
042                StringBuilder sb = new StringBuilder(s.length());
043                
044                final int max = s.length();
045                for (int i = 0; i < max; i++) {
046                        char c = s.charAt(i);
047                        escape(c, sb);
048                }
049                
050                return sb.toString();
051        }
052        
053        protected String escape(char c) {
054                StringBuilder sb = new StringBuilder(6);
055                escape(c, sb);
056                return sb.toString();
057        }
058        
059        protected void escape(char c, StringBuilder sb) {
060                if (c >= 0x20 && c <= 0x7F)
061                        sb.append(c);
062                else {
063                        switch (c) {
064                                case '\n': sb.append("\\n"); break;
065                                case '\t': sb.append("\\t"); break;
066                                case '\r': sb.append("\\r"); break;
067                                case '\'': sb.append("\\\'"); break;
068                                case '\"': sb.append("\\\""); break;
069                                case '\\': sb.append("\\\\"); break;
070                                case '\b': sb.append("\\b"); break;
071                                case '\f': sb.append("\\f"); break;
072                                default: {
073                                        String hex = Integer.toHexString(c);
074                                        switch (hex.length()) {
075                                                case 1: sb.append("\\u000"); break;
076                                                case 2: sb.append("\\u00"); break;
077                                                case 3: sb.append("\\u0"); break;
078                                                default: sb.append("\\u"); break;
079                                        }
080                                        sb.append(hex);
081                                        break;
082                                }
083                        }
084                }
085        }
086}