/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.itextpdf.text.pdf.qrcode;
import java.util.HashMap;
/**
* Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
* of ISO 18004.
*
* @author Sean Owen
* @since 5.0.2
*/
public final class CharacterSetECI {
private static HashMap<String,CharacterSetECI> NAME_TO_ECI;
private static void initialize() {
HashMap<String,CharacterSetECI> n = new HashMap<String, CharacterSetECI>(29);
// TODO figure out if these values are even right!
addCharacterSet(0, "Cp437", n);
addCharacterSet(1, new String[] {"ISO8859_1", "ISO-8859-1"}, n);
addCharacterSet(2, "Cp437", n);
addCharacterSet(3, new String[] {"ISO8859_1", "ISO-8859-1"}, n);
addCharacterSet(4, new String[] {"ISO8859_2", "ISO-8859-2"}, n);
addCharacterSet(5, new String[] {"ISO8859_3", "ISO-8859-3"}, n);
addCharacterSet(6, new String[] {"ISO8859_4", "ISO-8859-4"}, n);
addCharacterSet(7, new String[] {"ISO8859_5", "ISO-8859-5"}, n);
addCharacterSet(8, new String[] {"ISO8859_6", "ISO-8859-6"}, n);
addCharacterSet(9, new String[] {"ISO8859_7", "ISO-8859-7"}, n);
addCharacterSet(10, new String[] {"ISO8859_8", "ISO-8859-8"}, n);
addCharacterSet(11, new String[] {"ISO8859_9", "ISO-8859-9"}, n);
addCharacterSet(12, new String[] {"ISO8859_10", "ISO-8859-10"}, n);
addCharacterSet(13, new String[] {"ISO8859_11", "ISO-8859-11"}, n);
addCharacterSet(15, new String[] {"ISO8859_13", "ISO-8859-13"}, n);
addCharacterSet(16, new String[] {"ISO8859_14", "ISO-8859-14"}, n);
addCharacterSet(17, new String[] {"ISO8859_15", "ISO-8859-15"}, n);
addCharacterSet(18, new String[] {"ISO8859_16", "ISO-8859-16"}, n);
addCharacterSet(20, new String[] {"SJIS", "Shift_JIS"}, n);
NAME_TO_ECI = n;
}
private final String encodingName;
private final int value;
private CharacterSetECI(int value, String encodingName) {
this.encodingName = encodingName;
this.value = value;
}
public String getEncodingName() {
return encodingName;
}
public int getValue() {
return value;
}
private static void addCharacterSet(int value, String encodingName, HashMap<String,CharacterSetECI> n) {
CharacterSetECI eci = new CharacterSetECI(value, encodingName);
n.put(encodingName, eci);
}
private static void addCharacterSet(int value, String[] encodingNames, HashMap<String,CharacterSetECI> n) {
CharacterSetECI eci = new CharacterSetECI(value, encodingNames[0]);
for (int i = 0; i < encodingNames.length; i++) {
n.put(encodingNames[i], eci);
}
}
/**
* @param name character set ECI encoding name
* @return {@link CharacterSetECI} representing ECI for character encoding, or null if it is legal
* but unsupported
*/
public static CharacterSetECI getCharacterSetECIByName(String name) {
if (NAME_TO_ECI == null) {
initialize();
}
return NAME_TO_ECI.get(name);
}
}
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