1 files changed, 86 insertions, 0 deletions
diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java
new file mode 100644
index 000000000..e8d6c2589
--- /dev/null
+++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2007 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.qrcode.decoder;
+
+/**
+ * <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
+ * defined by the QR code standard.</p>
+ *
+ * @author Sean Owen
+ */
+public final class ErrorCorrectionLevel {
+
+  // No, we can't use an enum here. J2ME doesn't support it.
+
+  /**
+   * L = ~7% correction
+   */
+  public static final ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L");
+  /**
+   * M = ~15% correction
+   */
+  public static final ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M");
+  /**
+   * Q = ~25% correction
+   */
+  public static final ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q");
+  /**
+   * H = ~30% correction
+   */
+  public static final ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H");
+
+  private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};
+
+  private final int ordinal;
+  private final int bits;
+  private final String name;
+
+  private ErrorCorrectionLevel(int ordinal, int bits, String name) {
+    this.ordinal = ordinal;
+    this.bits = bits;
+    this.name = name;
+  }
+
+  public int ordinal() {
+    return ordinal;
+  }
+
+  public int getBits() {
+    return bits;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public String toString() {
+    return name;
+  }
+
+  /**
+   * @param bits int containing the two bits encoding a QR Code's error correction level
+   * @return ErrorCorrectionLevel representing the encoded error correction level
+   */
+  public static ErrorCorrectionLevel forBits(int bits) {
+    if (bits < 0 || bits >= FOR_BITS.length) {
+      throw new IllegalArgumentException();
+    }
+    return FOR_BITS[bits];
+  }
+
+
+}