protected Header readHeaderFromBuffer(ByteBuffer buffer) throws WWRuntimeException {
// Read file code - first byte
int fileCode = buffer.get();
if (fileCode > 5) {
String message = Logging.getMessage("SHP.NotADBaseFile", file.getPath());
Logging.logger().log(java.util.logging.Level.SEVERE, message);
throw new WWRuntimeException(message);
}
// Last update date
int yy = 0xFF & buffer.get(); // unsigned
int mm = buffer.get();
int dd = buffer.get();
// Number of records
int numRecords = buffer.getInt();
// Header struct length
int headerLength = buffer.getShort();
// Record length
int recordLength = buffer.getShort();
// Assemble header
Header header = new Header();
header.fileCode = fileCode;
Calendar cal = Calendar.getInstance();
cal.set(1900 + yy, mm - 1, dd);
header.lastModificationDate = cal.getTime();
header.numberOfRecords = numRecords;
header.headerLength = headerLength;
header.recordLength = recordLength;
return header;
}
public DBaseFile(InputStream is) {
if (is == null) {
String message = Logging.getMessage("nullValue.InputStreamIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
this.file = null;
try {
this.header = this.readHeaderFromStream(is);
this.fields = this.readFieldsFromBuffer(this.header.fieldsHeaderBuffer);
this.records = this.readRecordsFromStream(is);
} catch (Exception e) {
String message = Logging.getMessage("generic.ExceptionAttemptingToReadFrom", is.toString());
Logging.logger().log(java.util.logging.Level.SEVERE, message, e);
throw new WWRuntimeException(message, e);
}
}
public List<DBaseRecord> getRecords() {
if (this.records == null && this.getFile() != null) {
File file = this.getFile();
try {
this.records = this.readRecordsFromFile(file);
} catch (Exception e) {
String message = Logging.getMessage("SHP.ExceptionAttemptingToReadFile", file.getPath());
Logging.logger().log(java.util.logging.Level.SEVERE, message, e);
throw new WWRuntimeException(message, e);
}
}
return this.records;
}
public DBaseFile(File file) {
if (file == null) {
String message = Logging.getMessage("nullValue.FileIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
this.file = file;
try {
this.header = this.readHeaderFromFile(file);
this.fields = this.readFieldsFromBuffer(this.header.fieldsHeaderBuffer);
// Delay records loading until getRecords() is called.
} catch (Exception e) {
String message = Logging.getMessage("SHP.ExceptionAttemptingToReadFile", file.getPath());
Logging.logger().log(java.util.logging.Level.SEVERE, message, e);
throw new WWRuntimeException(message, e);
}
}