diff options
Diffstat (limited to 'src/main/java/org/uic/barcode/staticFrame/DataRecord.java')
| -rw-r--r-- | src/main/java/org/uic/barcode/staticFrame/DataRecord.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/src/main/java/org/uic/barcode/staticFrame/DataRecord.java b/src/main/java/org/uic/barcode/staticFrame/DataRecord.java new file mode 100644 index 0000000..16d3811 --- /dev/null +++ b/src/main/java/org/uic/barcode/staticFrame/DataRecord.java @@ -0,0 +1,199 @@ +package org.uic.barcode.staticFrame;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+import org.uic.barcode.ticket.EncodingFormatException;
+
+/**
+ * The Class DataRecord implements the basic decoding and encoding
+ * of the data record structure, the split into tag, version, length and content.
+ *
+ * Implementing classes must provide decoding and encoding of the content
+ *
+ */
+public abstract class DataRecord {
+
+ /** The id tag. */
+ protected String idTag;
+
+ /** The version id. */
+ protected String versionId;
+
+ /** The content. */
+ protected byte[] content;
+
+ /**
+ * Instantiates a new data record.
+ *
+ * @param idTag the id tag
+ * @param version the version
+ */
+ public DataRecord (String idTag, String version) {
+ this.idTag = idTag;
+ this.versionId = version;
+ }
+
+ /**
+ * Instantiates a new data record.
+ *
+ * @param idTag the id tag
+ */
+ public DataRecord (String idTag) {
+ this.idTag = idTag;
+ }
+
+ /**
+ * Encode.
+ *
+ * @return the byte[]
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ public byte[] encode() throws IOException, EncodingFormatException {
+
+ ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+ encodeContent();
+
+ //size of tag + version + length
+ int length = 12;
+
+ //size of data
+ length = length + content.length;
+
+ String lengthElement = String.format("%04d",length);
+
+ while (idTag.length() < 6) {
+ idTag = idTag + " ";
+ }
+
+ while (versionId.length() < 2) {
+ versionId = "0" + versionId;
+ }
+
+ outputStream.write(idTag.getBytes());
+
+ outputStream.write(versionId.getBytes());
+
+ outputStream.write(lengthElement.getBytes());
+
+ outputStream.write(content);
+
+ return outputStream.toByteArray();
+ }
+
+ /**
+ * Decode.
+ *
+ * @param byteData the byte data
+ * @return the int
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ public int decode(byte[] byteData) throws IOException, EncodingFormatException {
+
+ int offset = 0;
+ String tag = new String(Arrays.copyOfRange(byteData, offset, offset + 6));
+ this.setIdTag(tag);
+ offset = offset + 6;
+
+ String version = new String(Arrays.copyOfRange(byteData, offset, offset + 2));
+ this.setVersionId(version);
+ offset = offset + 2;
+
+ String dataSize = new String(Arrays.copyOfRange(byteData, offset, offset + 4));
+ offset = offset + 4;
+
+ int length = Integer.parseInt(dataSize) - 12;
+ this.setData(Arrays.copyOfRange(byteData, offset, offset + length));
+
+ decodeContent();
+
+ return length + 12;
+ }
+
+
+ /**
+ * Gets the id tag.
+ *
+ * @return the id tag
+ */
+ public String getIdTag() {
+ return idTag;
+ }
+
+
+ /**
+ * Sets the id tag.
+ *
+ * @param idTag the new id tag
+ */
+ public void setIdTag(String idTag) {
+ this.idTag = idTag;
+ }
+
+
+ /**
+ * Gets the version id.
+ *
+ * @return the version id
+ */
+ public String getVersionId() {
+ return versionId;
+ }
+
+
+ /**
+ * Sets the version id.
+ *
+ * @param versionId the new version id
+ */
+ public void setVersionId(String versionId) {
+ this.versionId = versionId;
+ }
+
+
+ /**
+ * Gets the data.
+ *
+ * @return the data
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ protected byte[] getData() throws IOException, EncodingFormatException {
+ return content;
+ }
+
+
+ /**
+ * Sets the data.
+ *
+ * @param data the new data
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ protected void setData(byte[] data) throws IOException, EncodingFormatException {
+ this.content = data;
+ }
+
+
+
+ /**
+ * Decode content.
+ *
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ protected abstract void decodeContent() throws IOException, EncodingFormatException;
+
+ /**
+ * Encode content.
+ *
+ * @throws IOException Signals that an I/O exception has occurred.
+ * @throws EncodingFormatException the encoding format exception
+ */
+ protected abstract void encodeContent() throws IOException, EncodingFormatException;
+
+}
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