From b892c401c9e62f1cc34612703856e02969cee222 Mon Sep 17 00:00:00 2001
From: Daniel Gredler <daniel.gredler@gmail.com>
Date: Mon, 22 May 2023 18:53:35 -0400
Subject: [PATCH] Enable supported ECI charsets dynamically (#1625)

* Enable supported ECI charsets dynamically

* Remove use of Java 9+ API

* Remove property-based override for dynamic ECI charsets
---
 .../google/zxing/common/CharacterSetECI.java  | 25 +++++++++++--------
 .../encoder/HighLevelEncodeTestCase.java      |  2 +-
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/core/src/main/java/com/google/zxing/common/CharacterSetECI.java b/core/src/main/java/com/google/zxing/common/CharacterSetECI.java
index 5865445e2..6ea51f1e6 100644
--- a/core/src/main/java/com/google/zxing/common/CharacterSetECI.java
+++ b/core/src/main/java/com/google/zxing/common/CharacterSetECI.java
@@ -38,14 +38,14 @@ public enum CharacterSetECI {
   ISO8859_3(5, "ISO-8859-3"),
   ISO8859_4(6, "ISO-8859-4"),
   ISO8859_5(7, "ISO-8859-5"),
-  // ISO8859_6(8, "ISO-8859-6"),
+  ISO8859_6(8, "ISO-8859-6"),
   ISO8859_7(9, "ISO-8859-7"),
-  // ISO8859_8(10, "ISO-8859-8"),
+  ISO8859_8(10, "ISO-8859-8"),
   ISO8859_9(11, "ISO-8859-9"),
-  // ISO8859_10(12, "ISO-8859-10"),
-  // ISO8859_11(13, "ISO-8859-11"),
+  ISO8859_10(12, "ISO-8859-10"),
+  ISO8859_11(13, "ISO-8859-11"),
   ISO8859_13(15, "ISO-8859-13"),
-  // ISO8859_14(16, "ISO-8859-14"),
+  ISO8859_14(16, "ISO-8859-14"),
   ISO8859_15(17, "ISO-8859-15"),
   ISO8859_16(18, "ISO-8859-16"),
   SJIS(20, "Shift_JIS"),
@@ -60,16 +60,19 @@ public enum CharacterSetECI {
   GB18030(29, "GB2312", "EUC_CN", "GBK"),
   EUC_KR(30, "EUC-KR");
 
+  // only character sets supported by the current JVM are registered here
   private static final Map<Integer,CharacterSetECI> VALUE_TO_ECI = new HashMap<>();
   private static final Map<String,CharacterSetECI> NAME_TO_ECI = new HashMap<>();
   static {
     for (CharacterSetECI eci : values()) {
-      for (int value : eci.values) {
-        VALUE_TO_ECI.put(value, eci);
-      }
-      NAME_TO_ECI.put(eci.name(), eci);
-      for (String name : eci.otherEncodingNames) {
-        NAME_TO_ECI.put(name, eci);
+      if (Charset.isSupported(eci.name())) {
+        for (int value : eci.values) {
+          VALUE_TO_ECI.put(value, eci);
+        }
+        NAME_TO_ECI.put(eci.name(), eci);
+        for (String name : eci.otherEncodingNames) {
+          NAME_TO_ECI.put(name, eci);
+        }
       }
     }
   }
diff --git a/core/src/test/java/com/google/zxing/datamatrix/encoder/HighLevelEncodeTestCase.java b/core/src/test/java/com/google/zxing/datamatrix/encoder/HighLevelEncodeTestCase.java
index 438865965..c5b895907 100644
--- a/core/src/test/java/com/google/zxing/datamatrix/encoder/HighLevelEncodeTestCase.java
+++ b/core/src/test/java/com/google/zxing/datamatrix/encoder/HighLevelEncodeTestCase.java
@@ -500,7 +500,7 @@ public final class HighLevelEncodeTestCase extends Assert {
         "\u062C\u064E\u0651\u0627\u0635 (\u02BE\u0101\u1E63) \"pear\", suggested to have originated from Hebrew " +
         "\u05D0\u05B7\u05D2\u05B8\u05BC\u05E1 (ag\u00E1s)"));
     assertEquals("239 209 151 206 214 92 122 140 35 158 144 162 52 205 55 171 137 23 67 206 218 175 147 113 15 254" +
-        " 116 33 241 25 231 186 14 212 64 253 151 252 159 33 41 241 27 231 83 171 53 209 35 25 134 6 42 33 35 239 184" +
+        " 116 33 241 9 231 186 14 206 64 248 144 252 159 33 41 241 27 231 83 171 53 209 35 25 134 6 42 33 35 239 184" +
         " 31 193 234 7 252 205 101 127 241 209 34 24 5 22 23 221 148 179 239 128 140 92 187 106 204 198 59 19 25 114" +
         " 248 118 36 254 231 106 196 19 239 101 27 107 69 189 112 236 156 252 16 174 125 24 10 125 116 42 129",
         visualized);