mirror of
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134 lines
3.8 KiB
Java
134 lines
3.8 KiB
Java
/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.common;
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import com.google.zxing.FormatException;
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import java.nio.charset.Charset;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
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* of ISO 18004.
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*
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* @author Sean Owen
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*/
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public enum CharacterSetECI {
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// Enum name is a Java encoding valid for java.lang and java.io
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Cp437(new int[]{0,2}),
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ISO8859_1(new int[]{1,3}, "ISO-8859-1"),
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ISO8859_2(4, "ISO-8859-2"),
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ISO8859_3(5, "ISO-8859-3"),
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ISO8859_4(6, "ISO-8859-4"),
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ISO8859_5(7, "ISO-8859-5"),
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// ISO8859_6(8, "ISO-8859-6"),
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ISO8859_7(9, "ISO-8859-7"),
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// ISO8859_8(10, "ISO-8859-8"),
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ISO8859_9(11, "ISO-8859-9"),
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// ISO8859_10(12, "ISO-8859-10"),
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// ISO8859_11(13, "ISO-8859-11"),
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ISO8859_13(15, "ISO-8859-13"),
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// ISO8859_14(16, "ISO-8859-14"),
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ISO8859_15(17, "ISO-8859-15"),
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ISO8859_16(18, "ISO-8859-16"),
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SJIS(20, "Shift_JIS"),
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Cp1250(21, "windows-1250"),
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Cp1251(22, "windows-1251"),
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Cp1252(23, "windows-1252"),
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Cp1256(24, "windows-1256"),
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UnicodeBigUnmarked(25, "UTF-16BE", "UnicodeBig"),
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UTF8(26, "UTF-8"),
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ASCII(new int[] {27, 170}, "US-ASCII"),
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Big5(28),
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GB18030(29, "GB2312", "EUC_CN", "GBK"),
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EUC_KR(30, "EUC-KR");
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private static final Map<Integer,CharacterSetECI> VALUE_TO_ECI = new HashMap<>();
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private static final Map<String,CharacterSetECI> NAME_TO_ECI = new HashMap<>();
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static {
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for (CharacterSetECI eci : values()) {
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for (int value : eci.values) {
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VALUE_TO_ECI.put(value, eci);
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}
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NAME_TO_ECI.put(eci.name(), eci);
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for (String name : eci.otherEncodingNames) {
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NAME_TO_ECI.put(name, eci);
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}
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}
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}
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private final int[] values;
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private final String[] otherEncodingNames;
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CharacterSetECI(int value) {
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this(new int[] {value});
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}
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CharacterSetECI(int value, String... otherEncodingNames) {
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this.values = new int[] {value};
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this.otherEncodingNames = otherEncodingNames;
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}
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CharacterSetECI(int[] values, String... otherEncodingNames) {
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this.values = values;
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this.otherEncodingNames = otherEncodingNames;
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}
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public int getValue() {
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return values[0];
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}
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public Charset getCharset() {
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return Charset.forName(name());
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}
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/**
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* @param charset Java character set object
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* @return CharacterSetECI representing ECI for character encoding, or null if it is legal
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* but unsupported
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*/
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public static CharacterSetECI getCharacterSetECI(Charset charset) {
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return NAME_TO_ECI.get(charset.name());
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}
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/**
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* @param value character set ECI value
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* @return {@code CharacterSetECI} representing ECI of given value, or null if it is legal but
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* unsupported
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* @throws FormatException if ECI value is invalid
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*/
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public static CharacterSetECI getCharacterSetECIByValue(int value) throws FormatException {
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if (value < 0 || value >= 900) {
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throw FormatException.getFormatInstance();
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}
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return VALUE_TO_ECI.get(value);
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}
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/**
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* @param name character set ECI encoding name
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* @return CharacterSetECI representing ECI for character encoding, or null if it is legal
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* but unsupported
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*/
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public static CharacterSetECI getCharacterSetECIByName(String name) {
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return NAME_TO_ECI.get(name);
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}
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}
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