001/* 002 * Copyright 2008 ZXing authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.itextpdf.text.pdf.qrcode; 018 019import java.util.HashMap; 020 021/** 022 * Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1 023 * of ISO 18004. 024 * 025 * @author Sean Owen 026 * @since 5.0.2 027 */ 028public final class CharacterSetECI { 029 030 private static HashMap<String,CharacterSetECI> NAME_TO_ECI; 031 032 private static void initialize() { 033 HashMap<String,CharacterSetECI> n = new HashMap<String, CharacterSetECI>(29); 034 // TODO figure out if these values are even right! 035 addCharacterSet(0, "Cp437", n); 036 addCharacterSet(1, new String[] {"ISO8859_1", "ISO-8859-1"}, n); 037 addCharacterSet(2, "Cp437", n); 038 addCharacterSet(3, new String[] {"ISO8859_1", "ISO-8859-1"}, n); 039 addCharacterSet(4, new String[] {"ISO8859_2", "ISO-8859-2"}, n); 040 addCharacterSet(5, new String[] {"ISO8859_3", "ISO-8859-3"}, n); 041 addCharacterSet(6, new String[] {"ISO8859_4", "ISO-8859-4"}, n); 042 addCharacterSet(7, new String[] {"ISO8859_5", "ISO-8859-5"}, n); 043 addCharacterSet(8, new String[] {"ISO8859_6", "ISO-8859-6"}, n); 044 addCharacterSet(9, new String[] {"ISO8859_7", "ISO-8859-7"}, n); 045 addCharacterSet(10, new String[] {"ISO8859_8", "ISO-8859-8"}, n); 046 addCharacterSet(11, new String[] {"ISO8859_9", "ISO-8859-9"}, n); 047 addCharacterSet(12, new String[] {"ISO8859_10", "ISO-8859-10"}, n); 048 addCharacterSet(13, new String[] {"ISO8859_11", "ISO-8859-11"}, n); 049 addCharacterSet(15, new String[] {"ISO8859_13", "ISO-8859-13"}, n); 050 addCharacterSet(16, new String[] {"ISO8859_14", "ISO-8859-14"}, n); 051 addCharacterSet(17, new String[] {"ISO8859_15", "ISO-8859-15"}, n); 052 addCharacterSet(18, new String[] {"ISO8859_16", "ISO-8859-16"}, n); 053 addCharacterSet(20, new String[] {"SJIS", "Shift_JIS"}, n); 054 NAME_TO_ECI = n; 055 } 056 057 private final String encodingName; 058 private final int value; 059 060 private CharacterSetECI(int value, String encodingName) { 061 this.encodingName = encodingName; 062 this.value = value; 063 } 064 065 public String getEncodingName() { 066 return encodingName; 067 } 068 069 public int getValue() { 070 return value; 071 } 072 073 private static void addCharacterSet(int value, String encodingName, HashMap<String,CharacterSetECI> n) { 074 CharacterSetECI eci = new CharacterSetECI(value, encodingName); 075 n.put(encodingName, eci); 076 } 077 078 private static void addCharacterSet(int value, String[] encodingNames, HashMap<String,CharacterSetECI> n) { 079 CharacterSetECI eci = new CharacterSetECI(value, encodingNames[0]); 080 for (int i = 0; i < encodingNames.length; i++) { 081 n.put(encodingNames[i], eci); 082 } 083 } 084 085 /** 086 * @param name character set ECI encoding name 087 * @return {@link CharacterSetECI} representing ECI for character encoding, or null if it is legal 088 * but unsupported 089 */ 090 public static CharacterSetECI getCharacterSetECIByName(String name) { 091 if (NAME_TO_ECI == null) { 092 initialize(); 093 } 094 return NAME_TO_ECI.get(name); 095 } 096 097}