/**
* Reads functional diagram blocks descriptions from functional diagram file.
*
* @throws FileNotFoundException
* @throws IOException
* @param filePath Path to functional diagram file
* @param fileHeader Yokogawa file header instance
* @return List of Yokogawa functional block records
*/
private List<YgBlockRecord> _readFbdBlocks(String filePath, YgFileHeader fbdHeader)
throws FileNotFoundException, IOException {
RandomAccessFile diagramFile = new RandomAccessFile(filePath, "r");
List<YgBlockRecord> result = new ArrayList<YgBlockRecord>();
YgFileHeaderContents contentItem;
contentItem = fbdHeader.getContentItem("RGTL");
if (contentItem == null) return result;
long count = contentItem.getNumber();
if (count <= 0) return result;
// Move file pointer to beginning of section with functinal blocks description:
diagramFile.seek(contentItem.getOffset());
YgBlockRecord tempBlockDescription;
byte[] temp48BytesArray = new byte[48];
// Read all available block records:
for (int i = 0; i < count; i++) {
diagramFile.read(temp48BytesArray);
tempBlockDescription = new YgBlockRecord(temp48BytesArray);
result.add(tempBlockDescription);
} // for
diagramFile.close();
return result;
} // _readFbdBlocks
/**
* Reads functional block tags set from Yokogawa DCS backup file content.
*
* @throws FileNotFoundException
* @throws IOException
* @param filePath Path to file
* @param blockFileHeader Yokogawa file header instance
* @return List of Yokogawa tag record instances
*/
private List<YgTagRecord> _readAsBlockTagsList(String filePath, YgFileHeader blockFileHeader)
throws FileNotFoundException, IOException {
RandomAccessFile blockFile = new RandomAccessFile(filePath, "r");
List<YgTagRecord> result = new ArrayList<YgTagRecord>();
YgFileHeaderContents contentItem;
contentItem = blockFileHeader.getContentItem("HTLT");
if (contentItem == null) return result;
long count = contentItem.getNumber();
if (count <= 0) return result;
// Move file pointer to beginning of section with functinal block's tag descriptions:
blockFile.seek(contentItem.getOffset());
byte[] tagRecordBytes = new byte[128];
// Read all available tag records:
for (int i = 0; i < count; i++) {
blockFile.read(tagRecordBytes);
YgTagRecord tagRecord = new YgTagRecord(tagRecordBytes);
result.add(tagRecord);
} // for
blockFile.close();
return result;
} // _readAsBlockTagsList
/**
* Reads engineering units library file.
*
* @throws FileNotFoundException
* @throws IOException
* @param filePath Path to engineering units file
* @param fileHeader Yokogawa file header instance
* @return Engineering unit names collection
*/
private List<String> _readAsEngUnitsList(String filePath, YgFileHeader fileHeader)
throws FileNotFoundException, IOException {
List<String> result = new ArrayList();
RandomAccessFile engUnitsFile = new RandomAccessFile(filePath, "r");
YgFileHeaderContents contentItem;
contentItem = fileHeader.getContentItem("EUNT");
if (contentItem == null) return result;
long count = contentItem.getNumber();
if (count <= 0) return result;
// Move file pointer to beginning of section with units description:
engUnitsFile.seek(contentItem.getOffset());
byte[] tempUnitsBytes = new byte[8];
String tempUnits;
// Read all available units:
for (int i = 0; i < count; i++) {
engUnitsFile.read(tempUnitsBytes);
tempUnits = new String(tempUnitsBytes);
result.add(tempUnits);
} // for
engUnitsFile.close();
return result;
} // _readAsEngUnitsList
/**
* Reads functional block's tuning parameters as string.
*
* @throws FileNotFoundException
* @throws IOException
* @param filePath Path to file
* @param blockFileHeader Yokogawa file header instance
* @return Block tuning parameters string
*/
private String _readBlockTuningParameters(String filePath, YgFileHeader blockFileHeader)
throws FileNotFoundException, IOException {
RandomAccessFile blockFile = new RandomAccessFile(filePath, "r");
String result = "";
YgFileHeaderContents contentItem;
contentItem = blockFileHeader.getContentItem("HTLT");
if (contentItem == null) return result;
long count = contentItem.getNumber();
if (count <= 0) return result;
// Move file pointer to beginning of section with functinal block's tuning parameters:
blockFile.seek(contentItem.getOffset() + 128 * count);
byte[] blockParamsBytes = new byte[1024];
blockFile.read(blockParamsBytes);
return new String(blockParamsBytes);
} // _readBlockTuningParameters