Java Code Examples for ucar.unidata.io.RandomAccessFile#readInt()
The following examples show how to use
ucar.unidata.io.RandomAccessFile#readInt() .
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Example 1
| Source File: GribCdmIndex.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
private boolean openIndex(RandomAccessFile indexRaf, Logger logger) {
try {
indexRaf.order(RandomAccessFile.BIG_ENDIAN);
indexRaf.seek(0);
//// header message
byte[] magic = new byte[Grib2CollectionWriter.MAGIC_START.getBytes(StandardCharsets.UTF_8).length]; // they are
// all the
// same
indexRaf.readFully(magic);
int version = indexRaf.readInt();
long recordLength = indexRaf.readLong();
if (recordLength > Integer.MAX_VALUE) {
logger.error("Grib2Collection {}: invalid recordLength size {}", indexRaf.getLocation(), recordLength);
return false;
}
indexRaf.skipBytes(recordLength);
int size = NcStream.readVInt(indexRaf);
if ((size < 0) || (size > 100 * 1000 * 1000)) {
logger.warn("GribCdmIndex {}: invalid index size {}", indexRaf.getLocation(), size);
return false;
}
byte[] m = new byte[size];
indexRaf.readFully(m);
gribCollectionIndex = GribCollectionProto.GribCollection.parseFrom(m);
return true;
} catch (Throwable t) {
logger.error("Error reading index " + indexRaf.getLocation(), t);
return false;
}
}
Example 2
| Source File: V5DStruct.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
/**
* Read a compressed grid from a COMP* file.
*
* @return true = ok, false = error.
*/
boolean read_comp_grid(int time, int vr, float[] ga, float[] gb, byte[] compdata1)
throws IOException, BadFormException {
long pos;
short bias;
int i, n, nl;
RandomAccessFile f = FileDesc;
// move to position in file
pos = grid_position(time, vr);
f.seek(pos);
if (FileFormat == 0x80808083) {
// read McIDAS grid and file numbers
int mcfile, mcgrid;
mcfile = f.readInt();
mcgrid = f.readInt();
McFile[time][vr] = (short) mcfile;
McGrid[time][vr] = (short) mcgrid;
}
nl = Nl[vr];
if (FileFormat == 0x80808080 || FileFormat == 0x80808081) {
// single ga, gb pair for whole grid
float a, b;
a = f.readFloat();
b = f.readFloat();
// convert a, b to new v5d ga, gb values
for (i = 0; i < nl; i++) {
if (a == 0.0) {
ga[i] = gb[i] = 0.0f;
} else {
gb[i] = (b + 128.0f) / -a;
ga[i] = 1.0f / a;
}
}
bias = 128;
} else {
// read ga, gb arrays
read_float4_array(f, ga, Nl[vr]);
read_float4_array(f, gb, Nl[vr]);
// convert ga, gb values to v5d system
for (i = 0; i < nl; i++) {
if (ga[i] == 0.0) {
ga[i] = gb[i] = 0.0f;
} else {
// gb[i] = (gb[i]+125.0) / -ga[i];
gb[i] = (gb[i] + 128.0f) / -ga[i];
ga[i] = 1.0f / ga[i];
}
}
bias = 128; // 125 ???
}
// read compressed grid data
n = Nr * Nc * Nl[vr];
if (f.read(compdata1, 0, n) != n)
return false;
// convert data values to v5d system
n = Nr * Nc * Nl[vr];
for (i = 0; i < n; i++)
compdata1[i] += bias;
return true;
}
Example 3
| Source File: GempakGridReader.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
private Grib2Record makeGribRecord(RandomAccessFile raf, long start) throws IOException {
Grib2SectionIndicator is = new Grib2SectionIndicator(start, 0, 0); // apparently not in GEMPAK file (!)
Grib2SectionIdentification ids = null;
Grib2SectionLocalUse lus = null;
Grib2SectionGridDefinition gds = null;
Grib2SectionProductDefinition pds = null;
Grib2SectionDataRepresentation drs = null;
Grib2SectionBitMap bms = null;
Grib2SectionData dataSection = null;
raf.seek(start);
raf.order(RandomAccessFile.BIG_ENDIAN);
int secLength = raf.readInt();
if (secLength > 0) {
ids = new Grib2SectionIdentification(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
lus = new Grib2SectionLocalUse(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
gds = new Grib2SectionGridDefinition(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
pds = new Grib2SectionProductDefinition(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
drs = new Grib2SectionDataRepresentation(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
bms = new Grib2SectionBitMap(raf);
}
secLength = raf.readInt();
if (secLength > 0) {
dataSection = new Grib2SectionData(raf);
if (dataSection.getMsgLength() > secLength) // presumably corrupt
throw new IllegalStateException("Illegal Grib2SectionData Message Length");
}
// LOOK - not dealing with repeated records
return new Grib2Record(null, is, ids, lus, gds, pds, drs, bms, dataSection, false, Grib2Index.ScanModeMissing);
}
Example 4
| Source File: Cinrad2Record.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
public void readSCHeader(RandomAccessFile din) throws IOException {
message_offset = 0;
din.seek(message_offset);
// site info 170
din.skipBytes(90);
byte[] b10 = new byte[10];
// Message Header
din.read(b10);
String stationNId = new String(b10);
din.skipBytes(52);
// latlon
int lon = din.readInt();
int lat = din.readInt();
int hhh = din.readInt();
din.skipBytes(6);
//
message_type = 1;
// PerformanceInfo
din.skipBytes(31);
// ObservationInfo
vcp = convertunsignedByte2Short(din.readByte());
short syear = (short) din.readUnsignedShort();
short smm = convertunsignedByte2Short(din.readByte());
short sdd = convertunsignedByte2Short(din.readByte());
short shh = convertunsignedByte2Short(din.readByte());
short smi = convertunsignedByte2Short(din.readByte());
short sss = convertunsignedByte2Short(din.readByte());
dateTime0 = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
din.skipBytes(8);
long offset = din.getFilePointer();
sweepInfo = new SweepInfo[30];
for (int i = 0; i < 30; i++) {
sweepInfo[i] = new SweepInfo(din, (int) offset);
offset = offset + 21;
}
din.skipBytes(6);
syear = (short) din.readUnsignedShort();
smm = convertunsignedByte2Short(din.readByte());
sdd = convertunsignedByte2Short(din.readByte());
shh = convertunsignedByte2Short(din.readByte());
smi = convertunsignedByte2Short(din.readByte());
sss = convertunsignedByte2Short(din.readByte());
dateTimeE = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
}
Example 5
| Source File: Cinrad2Record.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
public void readCCHeader(RandomAccessFile din) throws IOException {
message_offset = 0;
din.seek(message_offset);
// site info 170
din.skipBytes(66);
// Message Header
String stationId = din.readString(40);
String stationNbr = din.readString(10);
din.skipBytes(20);
String clon = din.readString(16);
String clat = din.readString(16);
// latlon
int lon = din.readInt();
int lat = din.readInt();
int hhh = din.readInt();
din.skipBytes(4);
// ObservationInfo
short syear1 = convertunsignedByte2Short(din.readByte());
short syear2 = convertunsignedByte2Short(din.readByte());
short syear = (short) (syear1 * 100 + syear2);
short smm = convertunsignedByte2Short(din.readByte());
short sdd = convertunsignedByte2Short(din.readByte());
short shh = convertunsignedByte2Short(din.readByte());
short smi = convertunsignedByte2Short(din.readByte());
short sss = convertunsignedByte2Short(din.readByte());
dateTime0 = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
din.skipBytes(1);
syear1 = convertunsignedByte2Short(din.readByte());
syear2 = convertunsignedByte2Short(din.readByte());
syear = (short) (syear1 * 100 + syear2);
smm = convertunsignedByte2Short(din.readByte());
sdd = convertunsignedByte2Short(din.readByte());
shh = convertunsignedByte2Short(din.readByte());
smi = convertunsignedByte2Short(din.readByte());
sss = convertunsignedByte2Short(din.readByte());
dateTimeE = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
short scanMode = convertunsignedByte2Short(din.readByte());
if (scanMode == 10) {
sweepN = 1;
} else if (scanMode >= 100) {
sweepN = scanMode - 100;
} else {
throw new IOException("Error reading CINRAD CC data: Unsupported product: RHI/FFT");
}
elev = new int[sweepN];
din.skipBytes(4);
short sRHIA = (short) din.readUnsignedShort();
din.skipBytes(4);
echoType = din.readUnsignedShort();
if (echoType != 0x408a) // only support vppi at this moment
throw new IOException("Error reading CINRAD CC data: Unsupported level 2 data");
int prodCode = din.readUnsignedShort();
if (prodCode != 0x8003) // only support vppi at this moment
throw new IOException("Error reading CINRAD CC data: Unsupported product: RHI/FFT");
din.skipBytes(4);
// remain2[660]
for (int i = 0; i < sweepN; i++) {
int maxV = din.readUnsignedShort();
int maxL = din.readUnsignedShort();
int binWidth = din.readUnsignedShort();
int binNum = din.readUnsignedShort();
int recordTotalNum = din.readUnsignedShort();
din.skipBytes(8);
elev[i] = din.readUnsignedShort();
din.skipBytes(2);
// System.out.println("bin num: " + binNum + " maxL " + maxL + " totalRNumber " + recordTotalNum);
}
// din.seek(1020);
// int doffset = din.readInt();
// System.out.println(" Offset: " + doffset);
}
Example 6
| Source File: Cinrad2Record.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
public void readCC20Header(RandomAccessFile din) throws IOException {
message_offset = 0;
din.seek(message_offset);
// site info 170
din.skipBytes(62);
// Message Header
String stationId = din.readString(40);
String stationNbr = din.readString(10);
din.skipBytes(20);
String clon = din.readString(16);
String clat = din.readString(16);
// latlon
int lon = din.readInt();
int lat = din.readInt();
int hhh = din.readInt();
din.skipBytes(40);
// ObservationInfo
short scanMode = convertunsignedByte2Short(din.readByte());
if (scanMode == 10) {
sweepN = 1;
} else if (scanMode >= 100) {
sweepN = scanMode - 100;
} else {
throw new IOException("Error reading CINRAD CC data: Unsupported product: RHI/FFT");
}
short syear = (short) din.readUnsignedShort();
short smm = convertunsignedByte2Short(din.readByte());
short sdd = convertunsignedByte2Short(din.readByte());
short shh = convertunsignedByte2Short(din.readByte());
short smi = convertunsignedByte2Short(din.readByte());
short sss = convertunsignedByte2Short(din.readByte());
dateTime0 = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
din.skipBytes(14); // 14+ (35 - 21)
// remain2[660]
elev = new int[sweepN];
recordNum = new int[sweepN];
for (int i = 0; i < sweepN; i++) {
din.skipBytes(14);
int zbinWidth = din.readUnsignedShort();
int vbinWidth = din.readUnsignedShort();
int sbinWidth = din.readUnsignedShort();
int zbinNum = din.readUnsignedShort();
int vbinNum = din.readUnsignedShort();
int sbinNum = din.readUnsignedShort();
recordNum[i] = din.readUnsignedShort();
// if(i > 0)
// recordNum[i] = recordNum[i] + recordNum[i-1];
elev[i] = din.readShort();
cDataForm = din.readByte();
if (cDataForm != 22 && cDataForm != 23 && cDataForm != 24)
throw new IOException("Unsupported CC data format");
int dataP = din.readInt();
// din.skipBytes(2);
// System.out.println("zbin num: " + zbinNum + " vbin num: " + vbinNum + " sbin num: " + sbinNum + " dataForm " +
// cDataForm);
}
for (int i = sweepN; i < 32; i++) {
din.skipBytes(35);
}
din.skipBytes(6);
syear = (short) din.readUnsignedShort();
smm = convertunsignedByte2Short(din.readByte());
sdd = convertunsignedByte2Short(din.readByte());
shh = convertunsignedByte2Short(din.readByte());
smi = convertunsignedByte2Short(din.readByte());
sss = convertunsignedByte2Short(din.readByte());
dateTimeE = CalendarDate.of(null, syear, smm, sdd, shh, smi, sss);
}
Example 7
| Source File: BufrCdmIndex.java From netcdf-java with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
protected boolean readIndex(RandomAccessFile raf) {
this.idxFilename = raf.getLocation();
try {
raf.order(RandomAccessFile.BIG_ENDIAN);
raf.seek(0);
//// header message
if (!NcStream.readAndTest(raf, MAGIC_START.getBytes(StandardCharsets.UTF_8))) {
log.error("BufrCdmIndex {}: invalid index", raf.getLocation());
return false;
}
int indexVersion = raf.readInt();
boolean versionOk = (indexVersion == version);
if (!versionOk) {
log.warn("BufrCdmIndex {}: index found version={}, want version= {}", raf.getLocation(), indexVersion, version);
return false;
}
int size = NcStream.readVInt(raf);
if ((size < 0) || (size > 100 * 1000 * 1000)) {
log.warn("BufrCdmIndex {}: invalid or empty index ", raf.getLocation());
return false;
}
byte[] m = new byte[size];
raf.readFully(m);
BufrCdmIndexProto.BufrIndex proto = BufrCdmIndexProto.BufrIndex.parseFrom(m);
bufrFilename = proto.getFilename();
root = proto.getRoot();
stations = proto.getStationsList();
start = proto.getStart();
end = proto.getEnd();
nobs = proto.getNobs();
// showProtoRoot(root);
} catch (Throwable t) {
log.error("Error reading index " + raf.getLocation(), t);
return false;
}
return true;
}
