ucar.nc2.iosp.hdf5.H5iosp Maven / Gradle / Ivy
/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.nc2.iosp.hdf5;
import thredds.catalog.DataFormatType;
import ucar.ma2.*;
import ucar.nc2.constants.CDM;
import ucar.nc2.time.CalendarDate;
import ucar.unidata.io.RandomAccessFile;
import ucar.nc2.iosp.*;
import ucar.nc2.iosp.hdf4.HdfEos;
import ucar.nc2.iosp.hdf4.H4header;
import ucar.nc2.*;
import java.io.IOException;
import java.io.PrintStream;
import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Formatter;
/**
* HDF5 I/O
*
* @author caron
*/
public class H5iosp extends AbstractIOServiceProvider {
static public final String IOSP_MESSAGE_INCLUDE_ORIGINAL_ATTRIBUTES = "IncludeOrgAttributes";
static public final int VLEN_T_SIZE = 16; // Appears to be no way to compute on the fly.
static boolean debug = false;
static boolean debugPos = false;
static boolean debugHeap = false;
static boolean debugFilter = false;
static boolean debugRead = false;
static boolean debugFilterIndexer = false;
static boolean debugChunkIndexer = false;
static boolean debugVlen = false;
static boolean debugStructure = false;
static boolean skipEos = false;
static private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(H5iosp.class);
static public void setDebugFlags(ucar.nc2.util.DebugFlags debugFlag) {
debug = debugFlag.isSet("H5iosp/read");
debugPos = debugFlag.isSet("H5iosp/filePos");
debugHeap = debugFlag.isSet("H5iosp/Heap");
debugFilter = debugFlag.isSet("H5iosp/filter");
debugFilterIndexer = debugFlag.isSet("H5iosp/filterIndexer");
debugChunkIndexer = debugFlag.isSet("H5iosp/chunkIndexer");
debugVlen = debugFlag.isSet("H5iosp/vlen");
skipEos = debugFlag.isSet("HdfEos/turnOff");
H5header.setDebugFlags(debugFlag);
H4header.setDebugFlags(debugFlag);
}
public boolean isValidFile(ucar.unidata.io.RandomAccessFile raf) throws IOException {
return H5header.isValidFile(raf);
}
public String getFileTypeId() {
if (isEos) return "HDF5-EOS";
if (headerParser.isNetcdf4()) return DataFormatType.NETCDF4.toString();
return DataFormatType.HDF5.toString();
}
public String getFileTypeDescription() {
return "Hierarchical Data Format, version 5";
}
public void getEosInfo(Formatter f) throws IOException {
NetcdfFile ncfile = headerParser.ncfile;
Group eosInfo = ncfile.getRootGroup().findGroup(HdfEos.HDF5_GROUP);
if (eosInfo != null) {
HdfEos.getEosInfo(ncfile, eosInfo, f);
} else {
f.format("Cant find GROUP '%s'", HdfEos.HDF5_GROUP);
}
}
//////////////////////////////////////////////////////////////////////////////////
//private RandomAccessFile raf;
private H5header headerParser;
private boolean isEos;
boolean includeOriginalAttributes = false;
/////////////////////////////////////////////////////////////////////////////
// reading
public void open(RandomAccessFile raf, ucar.nc2.NetcdfFile ncfile, ucar.nc2.util.CancelTask cancelTask) throws IOException {
super.open(raf, ncfile, cancelTask);
headerParser = new H5header(this.raf, ncfile, this);
headerParser.read(null);
// check if its an HDF5-EOS file
Group eosInfo = ncfile.getRootGroup().findGroup(HdfEos.HDF5_GROUP);
if (eosInfo != null && !skipEos) {
isEos = HdfEos.amendFromODL(ncfile, eosInfo);
}
ncfile.finish();
}
public Array readData(ucar.nc2.Variable v2, Section section) throws IOException, InvalidRangeException {
H5header.Vinfo vinfo = (H5header.Vinfo) v2.getSPobject();
if (debugRead) System.out.printf("%s read %s%n", v2.getFullName(), section);
return readData(v2, vinfo.dataPos, section);
}
// all the work is here, so can be called recursively
private Array readData(ucar.nc2.Variable v2, long dataPos, Section wantSection) throws IOException, InvalidRangeException {
H5header.Vinfo vinfo = (H5header.Vinfo) v2.getSPobject();
DataType dataType = v2.getDataType();
Object data;
Layout layout;
if (vinfo.useFillValue) { // fill value only
Object pa = IospHelper.makePrimitiveArray((int) wantSection.computeSize(), dataType, vinfo.getFillValue());
if (dataType == DataType.CHAR)
pa = IospHelper.convertByteToChar((byte[]) pa);
return Array.factory(dataType.getPrimitiveClassType(), wantSection.getShape(), pa);
}
if (vinfo.mfp != null) { // filtered
if (debugFilter) System.out.println("read variable filtered " + v2.getFullName() + " vinfo = " + vinfo);
assert vinfo.isChunked;
ByteOrder bo = (vinfo.typeInfo.endian == 0) ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
layout = new H5tiledLayoutBB(v2, wantSection, raf, vinfo.mfp.getFilters(), bo);
data = IospHelper.readDataFill((LayoutBB) layout, v2.getDataType(), vinfo.getFillValue());
} else { // normal case
if (debug) System.out.println("read variable " + v2.getFullName() + " vinfo = " + vinfo);
DataType readDtype = v2.getDataType();
int elemSize = v2.getElementSize();
Object fillValue = vinfo.getFillValue();
int endian = vinfo.typeInfo.endian;
// fill in the wantSection
wantSection = Section.fill(wantSection, v2.getShape());
if (vinfo.typeInfo.hdfType == 2) { // time
readDtype = vinfo.mdt.timeType;
elemSize = readDtype.getSize();
fillValue = vinfo.getFillValueDefault(readDtype);
} else if (vinfo.typeInfo.hdfType == 8) { // enum
H5header.TypeInfo baseInfo = vinfo.typeInfo.base;
readDtype = baseInfo.dataType;
elemSize = readDtype.getSize();
fillValue = vinfo.getFillValueDefault(readDtype);
endian = baseInfo.endian;
} else if (vinfo.typeInfo.hdfType == 9) { // vlen
elemSize = vinfo.typeInfo.byteSize;
endian = vinfo.typeInfo.endian;
//wantSection = wantSection.removeVlen(); // remove vlen dimension
}
if (vinfo.isChunked) {
layout = new H5tiledLayout((H5header.Vinfo) v2.getSPobject(), readDtype, wantSection);
} else {
layout = new LayoutRegular(dataPos, elemSize, v2.getShape(), wantSection);
}
data = readData(vinfo, v2, layout, readDtype, wantSection.getShape(), fillValue, endian);
}
if (data instanceof Array)
return (Array) data;
else if (dataType == DataType.STRUCTURE)
return convertStructure((Structure) v2, layout, wantSection.getShape(), (byte[]) data); // LOOK
else
return Array.factory(dataType.getPrimitiveClassType(), wantSection.getShape(), data);
}
/*
* Read data subset from file for a variable, return Array or java primitive array.
*
* @param v the variable to read.
* @param layout handles skipping around in the file.
* @param dataType dataType of the data to read
* @param shape the shape of the output
* @param fillValue fill value as a wrapped primitive
* @return primitive array or Array with data read in
* @throws java.io.IOException if read error
* @throws ucar.ma2.InvalidRangeException if invalid section
*/
private Object readData(H5header.Vinfo vinfo, Variable v, Layout layout, DataType dataType, int[] shape,
Object fillValue, int endian) throws java.io.IOException, InvalidRangeException {
H5header.TypeInfo typeInfo = vinfo.typeInfo;
// special processing
if (typeInfo.hdfType == 2) { // time
Object data = IospHelper.readDataFill(raf, layout, dataType, fillValue, endian, true);
Array timeArray = Array.factory(dataType.getPrimitiveClassType(), shape, data);
// now transform into an ISO Date String
String[] stringData = new String[(int) timeArray.getSize()];
int count = 0;
while (timeArray.hasNext()) {
long time = timeArray.nextLong();
stringData[count++] = CalendarDate.of(time).toString();
}
return Array.factory(String.class, shape, stringData);
}
if (typeInfo.hdfType == 8) { // enum
Object data = IospHelper.readDataFill(raf, layout, dataType, fillValue, endian);
return Array.factory(dataType.getPrimitiveClassType(), shape, data);
}
if ((typeInfo.hdfType == 9) && !typeInfo.isVString) { // vlen (not string)
DataType readType = dataType;
if (typeInfo.isVString) // string
readType = DataType.BYTE;
else if (typeInfo.base.hdfType == 7) // reference
readType = DataType.LONG;
// general case is to read an array of vlen objects
// each vlen generates an Array - so return ArrayObject of Array
//boolean scalar = false; // layout.getTotalNelems() == 1; // if scalar, return just the len Array // remove 12/25/10 jcaron
Array[] data = new Array[(int) layout.getTotalNelems()];
int count = 0;
while (layout.hasNext()) {
Layout.Chunk chunk = layout.next();
if (chunk == null) continue;
for (int i = 0; i < chunk.getNelems(); i++) {
long address = chunk.getSrcPos() + layout.getElemSize() * i;
Array vlenArray = headerParser.getHeapDataArray(address, readType, endian);
data[count++] = (typeInfo.base.hdfType == 7) ? convertReference(vlenArray) : vlenArray;
}
}
int prefixrank = 0;
for(int i=0;i= 0)
m.setDataObject(vm.typeInfo.endian == RandomAccessFile.LITTLE_ENDIAN ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
// vm.dataPos : offset since start of Structure
m.setDataParam((int) vm.dataPos);
// track if there is a heap
if (v2.getDataType() == DataType.STRING || v2.isVariableLength())
hasHeap = true;
// recurse
if (v2 instanceof Structure) {
Structure nested = (Structure) v2;
StructureMembers nestSm = nested.makeStructureMembers();
m.setStructureMembers(nestSm);
hasHeap |= convertStructure(nested, nestSm);
}
}
return hasHeap;
}
/*
public static int setOffsets(StructureMembers members) {
int offset = 0;
for (StructureMembers.Member m : members.getMembers()) {
m.setDataParam(offset);
offset += m.getSizeBytes();
// set inner offsets (starts again at 0)
if (m.getStructureMembers() != null)
setOffsets(m.getStructureMembers());
}
members.setStructureSize(offset);
return offset;
}
*/
void convertHeap(ArrayStructureBB asbb, int pos, StructureMembers sm) throws java.io.IOException, InvalidRangeException {
ByteBuffer bb = asbb.getByteBuffer();
for (StructureMembers.Member m : sm.getMembers()) {
if (m.getDataType() == DataType.STRING) {
m.setDataObject(ByteOrder.nativeOrder()); // the index is always written in "native order"
int size = m.getSize();
int destPos = pos + m.getDataParam();
String[] result = new String[size];
for (int i = 0; i < size; i++)
result[i] = headerParser.readHeapString(bb, destPos + i * 16); // 16 byte "heap ids" are in the ByteBuffer
int index = asbb.addObjectToHeap(result);
bb.order(ByteOrder.nativeOrder()); // the string index is always written in "native order"
bb.putInt(destPos, index); // overwrite with the index into the StringHeap
} else if (m.isVariableLength()) {
int startPos = pos + m.getDataParam();
bb.order(ByteOrder.LITTLE_ENDIAN);
ByteOrder bo = (ByteOrder) m.getDataObject();
int endian = bo.equals(ByteOrder.LITTLE_ENDIAN) ? RandomAccessFile.LITTLE_ENDIAN : RandomAccessFile.BIG_ENDIAN;
// Compute rank and size upto the first (and ideally last) VLEN
int[] fieldshape = m.getShape();
int prefixrank = 0;
int size = 1;
for(;prefixrank < fieldshape.length;prefixrank++) {
if(fieldshape[prefixrank] < 0) break;
size *= fieldshape[prefixrank];
}
assert size == m.getSize() : "Internal error: field size mismatch";
Array[] fieldarray = new Array[size]; // hold all the vlen instance data
// destPos will point to each vlen instance in turn
// assuming we have 'size' such instances in a row.
int destPos = startPos;
for(int i = 0;i < size;i++) {
// vlenarray extracts the i'th vlen contents (struct not supported).
Array vlenArray = headerParser.readHeapVlen(bb, destPos, m.getDataType(), endian);
fieldarray[i] = vlenArray;
destPos += VLEN_T_SIZE; // Apparentlly no way to compute VLEN_T_SIZE on the fly
}
Array result = null;
if(prefixrank == 0) // if scalar, return just the singleton vlen array
result = fieldarray[0];
else if(prefixrank == 1)
result = new ArrayObject(fieldarray[0].getClass(), new int[]{size}, fieldarray);
else {
// Otherwise create and fill in an n-dimensional Array Of Arrays
int[] newshape = new int[prefixrank];
System.arraycopy(fieldshape, 0, newshape, 0, prefixrank);
Array ndimarray = Array.factory(Array.class, newshape);
// Transfer the elements of data into the n-dim arrays
IndexIterator iter = ndimarray.getIndexIterator();
for(int i = 0;iter.hasNext();i++) {
iter.setObjectNext(fieldarray[i]);
}
result = ndimarray;
}
//Array vlenArray = headerParser.readHeapVlen(bb, destPos, m.getDataType(), endian);
int index = asbb.addObjectToHeap(result);
bb.order(ByteOrder.nativeOrder());
bb.putInt(startPos, index); // overwrite with the index into the Heap
}
}
}
/*
* Read data subset from file for a variable, create primitive array.
*
* @param layout handles skipping around in the file.
* @param dataType dataType of the variable
* @param shape the shape of the output
* @param fillValue fill value as a wrapped primitive
* @param endian byte order
* @return primitive array with data read in
* @throws java.io.IOException if read error
* @throws ucar.ma2.InvalidRangeException if invalid section
*/
Object readDataPrimitive(Layout layout, DataType dataType, int[] shape, Object fillValue, int endian, boolean convertChar) throws java.io.IOException, InvalidRangeException {
if (dataType == DataType.STRING) {
int size = (int) layout.getTotalNelems();
String[] sa = new String[size];
int count = 0;
while (layout.hasNext()) {
Layout.Chunk chunk = layout.next();
if (chunk == null) continue;
for (int i = 0; i < chunk.getNelems(); i++) { // 16 byte "heap ids"
sa[count++] = headerParser.readHeapString(chunk.getSrcPos() + layout.getElemSize() * i);
}
}
return sa;
}
if (dataType == DataType.OPAQUE) {
Array opArray = new ArrayObject(ByteBuffer.class, shape);
assert (new Section(shape).computeSize() == layout.getTotalNelems());
int count = 0;
while (layout.hasNext()) {
Layout.Chunk chunk = layout.next();
if (chunk == null) continue;
int recsize = layout.getElemSize();
for (int i = 0; i < chunk.getNelems(); i++) {
byte[] pa = new byte[recsize];
raf.seek(chunk.getSrcPos() + i * recsize);
raf.readFully(pa, 0, recsize);
opArray.setObject(count++, ByteBuffer.wrap(pa));
}
}
return opArray;
}
// normal case
return IospHelper.readDataFill(raf, layout, dataType, fillValue, endian, convertChar);
}
// old way
private StructureData readStructure(Structure s, ArrayStructureW asw, long dataPos) throws IOException, InvalidRangeException {
StructureDataW sdata = new StructureDataW(asw.getStructureMembers());
if (debug) System.out.println(" readStructure " + s.getFullName() + " dataPos = " + dataPos);
for (Variable v2 : s.getVariables()) {
H5header.Vinfo vinfo = (H5header.Vinfo) v2.getSPobject();
if (debug) System.out.println(" readStructureMember " + v2.getFullName() + " vinfo = " + vinfo);
Array dataArray = readData(v2, dataPos + vinfo.dataPos, v2.getShapeAsSection());
sdata.setMemberData(v2.getShortName(), dataArray);
}
return sdata;
}
//////////////////////////////////////////////////////////////////////////
// utilities
/**
* Close the file.
*
* @throws IOException on io error
*/
public void close() throws IOException {
if (raf != null) {
raf.close();
// log.warn("H5iosp.close called on "+myRaf.getLocation()+" for ncfile="+ncfile.hashCode()+" for iosp="+this.hashCode());
}
raf = null;
headerParser.close();
}
/**
* Debug info for this object.
*/
public String toStringDebug(Object o) {
if (o instanceof Variable) {
Variable v = (Variable) o;
H5header.Vinfo vinfo = (H5header.Vinfo) v.getSPobject();
return vinfo.toString();
}
return null;
}
public String getDetailInfo() {
Formatter f = new Formatter();
ByteArrayOutputStream ff = new ByteArrayOutputStream(100 * 1000);
try {
NetcdfFile ncfile = new NetcdfFileSubclass();
H5header detailParser = new H5header(raf, ncfile, this);
detailParser.read(new PrintStream(ff, false, CDM.UTF8));
f.format("%s",super.getDetailInfo());
f.format("%s",ff.toString(CDM.UTF8));
} catch (IOException e) {
e.printStackTrace();
e.printStackTrace(new PrintStream(ff));
}
return f.toString();
}
// debug
public Object sendIospMessage(Object message) {
if (message.toString().equals(IOSP_MESSAGE_INCLUDE_ORIGINAL_ATTRIBUTES)) {
includeOriginalAttributes = true;
return null;
}
if (message.toString().equals("header"))
return headerParser;
if (message.toString().equals("headerEmpty")) {
NetcdfFile ncfile = new NetcdfFileSubclass();
return new H5header(raf, ncfile, this);
}
return super.sendIospMessage(message);
}
NetcdfFile getNetcdfFile() {
return headerParser.ncfile;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy