ucar.atd.dorade.DoradeSSWB Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of netcdf Show documentation
Show all versions of netcdf Show documentation
The NetCDF-Java Library is a Java interface to NetCDF files,
as well as to many other types of scientific data formats.
/*
* 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.atd.dorade;
import java.io.RandomAccessFile;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Title: DoradeSSWB
* Description: DORADE "super" sweep information block
* Copyright: Copyright (c) 2003
* Company: University Corporation for Atmospheric Research
* @author Chris Burghart
* @version $Revision:51 $ $Date:2006-07-12 17:13:13Z $
*/
/* $Id:DoradeSSWB.java 51 2006-07-12 17:13:13Z caron $ */
class DoradeSSWB extends DoradeDescriptor {
private class KeyTable {
public int offset;
public int size;
public int type;
//
// legal values for type
//
public final int KEYED_BY_TIME = 1;
public final int KEYED_BY_ROT_ANG = 2;
public final int SOLO_EDIT_SUMMARY = 3;
public KeyTable(int offset, int size, int type) {
this.offset = offset;
this.size = size;
this.type = type;
}
}
private Date lastUseTime;
private Date startTime;
private Date endTime;
private int fileSize;
private int compressionFlag;
private Date volumeTime;
private int nParams;
private String radarName;
private int version;
private int status;
private int nKeyTables;
private KeyTable[] keyTables;
public DoradeSSWB(RandomAccessFile file, boolean littleEndianData)
throws DescriptorException {
byte[] data = readDescriptor(file, littleEndianData, "SSWB");
//
// unpack
//
if (data == null) {
System.out.println("SSWB data null");
System.exit(1);
}
int intTime = grabInt(data, 8);
lastUseTime = new Date((long)intTime * 1000);
intTime = grabInt(data, 12);
startTime = new Date((long)intTime * 1000);
intTime = grabInt(data, 16);
endTime = new Date((long)intTime * 1000);
fileSize = grabInt(data, 20);
compressionFlag = grabInt(data, 24);
intTime = grabInt(data, 28);
volumeTime = new Date((long)intTime * 1000);
nParams = grabInt(data, 32);
//
// Old SSWB stops after the param count, new one has more stuff
//
if (data.length == 36) {
radarName = "";
version = 0;
status = 0;
nKeyTables = 0;
keyTables = null;
} else {
radarName = new String(data, 36, 8).trim();
//
// AUUGGGGGHHHHHH! Everything after this is sometimes offset
// by an additional 4 bytes! If the length of the descriptor is
// 200, it's the additional offset version. (EDITORIAL NOTE: It
// may be easy to just use structures and compiler alignment when
// writing these files, but it makes it really hard to define a
// consistent data format. Here we have a case in point.)
//
int optOffset = (data.length == 200) ? 4 : 0;
//
// more precise start and end times (to millisecond) may be here
//
double doubleTime = grabDouble(data, 44 + optOffset);
if (doubleTime != 0.0)
startTime.setTime((long)(doubleTime * 1000));
doubleTime = grabDouble(data, 52 + optOffset);
if (doubleTime != 0.0)
endTime.setTime((long)(doubleTime * 1000));
//
// SSWB version, status, and key table count
//
version = grabInt(data, 60 + optOffset);
nKeyTables = grabInt(data, 64 + optOffset); // up to 8 key tables
status = grabInt(data, 68 + optOffset);
// 28 unused bytes after number of key tables
//
// key tables start at byte 100 (or 104, see above),
// each is 12 bytes
//
keyTables = (nKeyTables > 0) ? new KeyTable[nKeyTables] : null;
for (int i = 0; i < nKeyTables; i++) {
int entrystart = 100 + 12 * i + optOffset;
keyTables[i] = new KeyTable(grabInt(data, entrystart),
grabInt(data, entrystart + 4),
grabInt(data, entrystart + 8));
}
}
//
// debugging output
//
if (verbose)
System.out.println(this);
}
public String toString() {
String s = "SSWB\n";
s += " last use: " + formatDate(lastUseTime) + "\n";
s += " start time: " + formatDate(startTime) + "\n";
s += " end time: " + formatDate(endTime) + "\n";
s += " file size: " + fileSize + "\n";
s += " compression flag: " + compressionFlag + "\n";
s += " volume time: " + formatDate(volumeTime) + "\n";
s += " number of params: " + nParams + "\n";
s += " radar name: " + radarName + "\n";
s += " SSWB version: " + version + "\n";
s += " status: " + status + "\n";
s += " number of key tables: " + nKeyTables;
return s;
}
/**
* Get the start time for this sweep.
* @return Date of the start of this sweep
*/
public Date getStartTime() {
return startTime;
}
/**
* Get the end time for this sweep.
* @return Date of the end of this sweep
*/
public Date getEndTime() {
return endTime;
}
}