moved java files for pre-convert

src/common/CharacterSetECI.java

@@ -0,0 +1,133 @@
+/*
+ * 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.google.zxing.common;
+
+import com.google.zxing.FormatException;
+
+import java.nio.charset.Charset;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
+ * of ISO 18004.
+ *
+ * @author Sean Owen
+ */
+public enum CharacterSetECI {
+
+  // Enum name is a Java encoding valid for java.lang and java.io
+  Cp437(new int[]{0,2}),
+  ISO8859_1(new int[]{1,3}, "ISO-8859-1"),
+  ISO8859_2(4, "ISO-8859-2"),
+  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_7(9, "ISO-8859-7"),
+  // 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_13(15, "ISO-8859-13"),
+  // ISO8859_14(16, "ISO-8859-14"),
+  ISO8859_15(17, "ISO-8859-15"),
+  ISO8859_16(18, "ISO-8859-16"),
+  SJIS(20, "Shift_JIS"),
+  Cp1250(21, "windows-1250"),
+  Cp1251(22, "windows-1251"),
+  Cp1252(23, "windows-1252"),
+  Cp1256(24, "windows-1256"),
+  UnicodeBigUnmarked(25, "UTF-16BE", "UnicodeBig"),
+  UTF8(26, "UTF-8"),
+  ASCII(new int[] {27, 170}, "US-ASCII"),
+  Big5(28),
+  GB18030(29, "GB2312", "EUC_CN", "GBK"),
+  EUC_KR(30, "EUC-KR");
+
+  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);
+      }
+    }
+  }
+
+  private final int[] values;
+  private final String[] otherEncodingNames;
+
+  CharacterSetECI(int value) {
+    this(new int[] {value});
+  }
+
+  CharacterSetECI(int value, String... otherEncodingNames) {
+    this.values = new int[] {value};
+    this.otherEncodingNames = otherEncodingNames;
+  }
+
+  CharacterSetECI(int[] values, String... otherEncodingNames) {
+    this.values = values;
+    this.otherEncodingNames = otherEncodingNames;
+  }
+
+  public int getValue() {
+    return values[0];
+  }
+
+  public Charset getCharset() {
+    return Charset.forName(name());
+  }
+
+  /**
+   * @param charset Java character set object
+   * @return CharacterSetECI representing ECI for character encoding, or null if it is legal
+   *   but unsupported
+   */
+  public static CharacterSetECI getCharacterSetECI(Charset charset) {
+    return NAME_TO_ECI.get(charset.name());
+  }
+
+  /**
+   * @param value character set ECI value
+   * @return {@code CharacterSetECI} representing ECI of given value, or null if it is legal but
+   *   unsupported
+   * @throws FormatException if ECI value is invalid
+   */
+  public static CharacterSetECI getCharacterSetECIByValue(int value) throws FormatException {
+    if (value < 0 || value >= 900) {
+      throw FormatException.getFormatInstance();
+    }
+    return VALUE_TO_ECI.get(value);
+  }
+
+  /**
+   * @param name character set ECI encoding name
+   * @return CharacterSetECI representing ECI for character encoding, or null if it is legal
+   *   but unsupported
+   */
+  public static CharacterSetECI getCharacterSetECIByName(String name) {
+    return NAME_TO_ECI.get(name);
+  }
+
+}