Big RSS Expanded changelist -- thank you authors

[zxing.git] / core / src / com / google / zxing / oned / rss / expanded / decoders / AI01decoder.java

diff --git a/core/src/com/google/zxing/oned/rss/expanded/decoders/AI01decoder.java b/core/src/com/google/zxing/oned/rss/expanded/decoders/AI01decoder.java
new file mode 100644 (file)
index 0000000..62f878b
--- /dev/null
+++ b/core/src/com/google/zxing/oned/rss/expanded/decoders/AI01decoder.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+/*
+ * These authors would like to acknowledge the Spanish Ministry of Industry,
+ * Tourism and Trade, for the support in the project TSI020301-2008-2
+ * "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled
+ * Mobile Dynamic Environments", led by Treelogic
+ * ( http://www.treelogic.com/ ):
+ *
+ *   http://www.piramidepse.com/
+ */
+
+package com.google.zxing.oned.rss.expanded.decoders;
+
+import com.google.zxing.common.BitArray;
+
+/**
+ * @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)
+ * @author Eduardo Castillejo, University of Deusto (eduardo.castillejo@deusto.es)
+ */
+abstract class AI01decoder extends AbstractExpandedDecoder {
+
+  protected static final int gtinSize   = 40;
+
+  AI01decoder(BitArray information) {
+    super(information);
+  }
+
+  protected void encodeCompressedGtin(StringBuffer buf, int currentPos) {
+    buf.append("(01)");
+    int initialPosition = buf.length();
+    buf.append('9');
+
+    encodeCompressedGtinWithoutAI(buf, currentPos, initialPosition);
+  }
+
+  protected void encodeCompressedGtinWithoutAI(StringBuffer buf, int currentPos, int initialBufferPosition) {
+    for(int i = 0; i < 4; ++i){
+      int currentBlock = this.generalDecoder.extractNumericValueFromBitArray(currentPos + 10 * i, 10);
+      if (currentBlock / 100 == 0) {
+        buf.append('0');
+      }
+      if (currentBlock / 10 == 0) {
+        buf.append('0');
+      }
+      buf.append(currentBlock);
+    }
+
+      appendCheckDigit(buf, initialBufferPosition);
+  }
+
+  private static void appendCheckDigit(StringBuffer buf, int currentPos){
+    int checkDigit = 0;
+    for (int i = 0; i < 13; i++) {
+      int digit = buf.charAt(i + currentPos) - '0';
+      checkDigit += (((i & 0x01) == 0) ? 3 * digit : digit);
+    }
+
+    checkDigit = 10 - (checkDigit % 10);
+    if (checkDigit == 10) {
+      checkDigit = 0;
+    }
+
+    buf.append(checkDigit);
+  }
+
+}