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Issue #2905 added ucar bufr parser

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added netcdf 4.2 bufr library to ucar.nc2 foss
added backported 4.3 bufr splitter library
created a parser wrapper for ease of use

(cherry picked from commit cf5ce74ac8d2ee60d7a98eda2236779300557bbc [formerly 5348f0a29d] [formerly 46513ea27c [formerly 5b69e9b21c] [formerly 199701def9] [formerly 46513ea27c [formerly 5b69e9b21c] [formerly 199701def9] [formerly 5348f0a29d [formerly 199701def9 [formerly 5ddf9be7105dbd8d1fb76ce28a4e6e3f03240974]]]]])


Former-commit-id: f5f48a2747 [formerly 58935ffa45] [formerly e8b2235bb2] [formerly f5f48a2747 [formerly 58935ffa45] [formerly e8b2235bb2] [formerly 8db12508fa [formerly e8b2235bb2 [formerly 3661aa1cf6ea4f82fa036c06f1c69666ad50104b]]]]
Former-commit-id: 8db12508fa
Former-commit-id: 344187a4f4 [formerly 88a0949afb] [formerly 330fa22b4b0105af5ae7aad944191a233141eb40 [formerly 3368a39aca]]
Former-commit-id: bee3b49886c3db29a36f94a9fcbad719216cf183 [formerly e86828c9f2]
Former-commit-id: 6df4566e9e
This commit is contained in:
Brian Clements 2014-03-12 14:30:37 -05:00 • committed by Steve Harris
parent f8b8bd322c
commit 6bc7b81b3c
18 changed files with 837 additions and 3 deletions
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7
cots/ucar.nc2.bufrsplitter/.classpath Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry exported="true" kind="lib" path="bufr-splitter-4.2.jar"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
<classpathentry kind="output" path="bin"/>
</classpath>

28
cots/ucar.nc2.bufrsplitter/.project Normal file
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@ -0,0 +1,28 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>ucar.nc2.bufrsplitter</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.pde.ManifestBuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.pde.SchemaBuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.pde.PluginNature</nature>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

7
cots/ucar.nc2.bufrsplitter/.settings/org.eclipse.jdt.core.prefs Normal file
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@ -0,0 +1,7 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
org.eclipse.jdt.core.compiler.compliance=1.6
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.source=1.6

10
cots/ucar.nc2.bufrsplitter/META-INF/MANIFEST.MF Normal file
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@ -0,0 +1,10 @@
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Bufrsplitter
Bundle-SymbolicName: ucar.nc2.bufrsplitter
Bundle-Version: 4.2
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Require-Bundle: ucar.nc2,
org.slf4j
Bundle-ClassPath: bufr-splitter-4.2.jar
Export-Package: ucar.nc2.iosp.bufr.writer

7
cots/ucar.nc2.bufrsplitter/README.txt Normal file
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@ -0,0 +1,7 @@
This contains the BUFR splitter classes from netcdf-java version 4.3.20.
The classes have been modified to work with netcdf-java version 4.2. Modifications have
been tagged with a comment containing the issue number related to the work (#2905).
This will not be needed if/when the ucar netcdf-java dependency is upgraded to 4.4.
It is also recommended that the newer BufrSplitter2.java be used instead of BufrSPlitter.java.
BufrSplitter2 has an improved interface that allows for use in other packages without modification.

BIN
cots/ucar.nc2.bufrsplitter/bufr-splitter-4.2.jar Normal file
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3
cots/ucar.nc2.bufrsplitter/build.properties Normal file
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@ -0,0 +1,3 @@
bin.includes = META-INF/,\
.,\
bufr-splitter-4.2.jar

1
cots/ucar.nc2/.classpath
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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry exported="true" kind="lib" path="bufr-3.0.jar"/>
<classpathentry exported="true" kind="lib" path="grib-8.0.jar"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>

8
cots/ucar.nc2/META-INF/MANIFEST.MF
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@ -2,9 +2,10 @@ Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Nc2
Bundle-SymbolicName: ucar.nc2
Bundle-Version: 1.0.0.qualifier
Bundle-Version: 4.2
Bundle-ClassPath: netcdf-4.2.jar,
grib-8.0.jar
grib-8.0.jar,
bufr-3.0.jar
Export-Package: net.jcip.annotations,
thredds.catalog,
thredds.catalog.crawl,
@ -111,6 +112,9 @@ Export-Package: net.jcip.annotations,
ucar.nc2.geotiff,
ucar.nc2.iosp,
ucar.nc2.iosp.adde,
ucar.nc2.iosp.bufr,
ucar.nc2.iosp.bufr.tables,
ucar.nc2.iosp.bufr.writer,
ucar.nc2.iosp.cinrad,
ucar.nc2.iosp.dmsp,
ucar.nc2.iosp.dorade,

BIN
cots/ucar.nc2/bufr-3.0.jar Normal file
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3
cots/ucar.nc2/build.properties
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@ -1,3 +1,4 @@
bin.includes = META-INF/,\
netcdf-4.2.jar,\
grib-8.0.jar
grib-8.0.jar,\
bufr-3.0.jar

7
edexOsgi/com.raytheon.uf.common.nc.bufr/.classpath Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="output" path="bin"/>
</classpath>

28
edexOsgi/com.raytheon.uf.common.nc.bufr/.project Normal file
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@ -0,0 +1,28 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>com.raytheon.uf.common.nc.bufr</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.pde.ManifestBuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.pde.SchemaBuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.pde.PluginNature</nature>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

7
edexOsgi/com.raytheon.uf.common.nc.bufr/.settings/org.eclipse.jdt.core.prefs Normal file
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@ -0,0 +1,7 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
org.eclipse.jdt.core.compiler.compliance=1.6
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.source=1.6

11
edexOsgi/com.raytheon.uf.common.nc.bufr/META-INF/MANIFEST.MF Normal file
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@ -0,0 +1,11 @@
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: NetCDF Bufr
Bundle-SymbolicName: com.raytheon.uf.common.nc.bufr
Bundle-Version: 14.3
Bundle-Vendor: RAYTHEON
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Require-Bundle: ucar.nc2,
ucar.nc2.bufrsplitter,
com.raytheon.uf.common.status
Export-Package: com.raytheon.uf.common.nc.bufr

4
edexOsgi/com.raytheon.uf.common.nc.bufr/build.properties Normal file
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@ -0,0 +1,4 @@
source.. = src/
output.. = bin/
bin.includes = META-INF/,\
.

629
edexOsgi/com.raytheon.uf.common.nc.bufr/src/com/raytheon/uf/common/nc/bufr/BufrParser.java Normal file
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@ -0,0 +1,629 @@
/**
* This software was developed and / or modified by Raytheon Company,
* pursuant to Contract DG133W-05-CQ-1067 with the US Government.
*
* U.S. EXPORT CONTROLLED TECHNICAL DATA
* This software product contains export-restricted data whose
* export/transfer/disclosure is restricted by U.S. law. Dissemination
* to non-U.S. persons whether in the United States or abroad requires
* an export license or other authorization.
*
* Contractor Name: Raytheon Company
* Contractor Address: 6825 Pine Street, Suite 340
* Mail Stop B8
* Omaha, NE 68106
* 402.291.0100
*
* See the AWIPS II Master Rights File ("Master Rights File.pdf") for
* further licensing information.
**/
package com.raytheon.uf.common.nc.bufr;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Stack;
import ucar.ma2.Array;
import ucar.ma2.ArraySequence;
import ucar.ma2.DataType;
import ucar.ma2.StructureData;
import ucar.ma2.StructureMembers;
import ucar.ma2.StructureMembers.Member;
import ucar.nc2.NetcdfFile;
import ucar.nc2.Structure;
import ucar.nc2.Variable;
import ucar.nc2.iosp.bufr.writer.BufrSplitter;
import ucar.nc2.iosp.bufr.writer.BufrSplitter.Options;
import com.raytheon.uf.common.status.IUFStatusHandler;
import com.raytheon.uf.common.status.UFStatus;
/**
* BUFR parser that utilizes the UCAR BUFR decoder that works with the Netcdf
* Java API. The parser works as an event-based pull parser. The standard usage
* involves an event loop that checks if hasNext() returns true then calls
* next() for the current event type which can be acted upon.
*
* <pre>
*
* SOFTWARE HISTORY
*
* Date Ticket# Engineer Description
* ------------ ---------- ----------- --------------------------
* Mar 18, 2014 2905 bclement Initial creation
*
* </pre>
*
* @author bclement
* @version 1.0
*/
public class BufrParser {
public static enum Event {
START_FILE, START_STRUCTURE, FIELD, END_STRUCTURE, END_FILE
}
private static final IUFStatusHandler log = UFStatus
.getHandler(BufrParser.class);
private final static File DEFAULT_TMP_DIR;
static {
final String edexHomeProp = "edex.home";
String baseDir = System.getProperty(edexHomeProp);
if (baseDir == null || baseDir.trim().isEmpty()){
log.warn("Property '" + edexHomeProp + "' not set, defaulting to system tmp directory");
DEFAULT_TMP_DIR = new File(System.getProperty("java.io.tmpdir"));
} else {
DEFAULT_TMP_DIR = new File(baseDir + File.separator + "data",
"processing");
}
}
private final Options options;
private final File[] splitFiles;
private int fileIndex = 0;
private NetcdfFile currentNcfile;
private Iterator<Variable> varIter;
private Variable currentVar;
private StructIterator structIter;
private static class StructureLevel {
public final StructureData structure;
public final Iterator<Member> memberIter;
public Member currentMember;
public StructureLevel(StructureData structure) {
this(structure, structure.getStructureMembers());
}
public StructureLevel(StructureData structure, StructureMembers members) {
this.structure = structure;
this.memberIter = members.getMembers().iterator();
}
}
private final Stack<StructureLevel> structStack = new Stack<BufrParser.StructureLevel>();
private Event lastEvent = null;
/**
* @param bufrFile
* BUFR file, may contain mixed message types
* @throws IOException
*/
public BufrParser(final File bufrFile)
throws IOException {
this(bufrFile, DEFAULT_TMP_DIR);
}
/**
* @param bufrFile
* BUFR file, may contain mixed message types
* @param outputBaseDir
* base directory for temporary storage of split files
* @throws IOException
*/
public BufrParser(final File bufrFile, final File outputBaseDir)
throws IOException {
final String inputFile = bufrFile.getAbsolutePath();
final File outputDir = getOutputDir(bufrFile.getName(), outputBaseDir);
options = new Options() {
@Override
public String getFileSpec() {
return inputFile;
}
@Override
public String getDirOut() {
return outputDir.getAbsolutePath();
}
};
BufrSplitter splitter = new BufrSplitter(options);
splitter.execute();
splitFiles = outputDir.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.endsWith(".bufr");
}
});
}
/**
* Create a temporary output directory based on the input file name
*
* @param inputName
* @param outputBaseDir
* @return
*/
private static File getOutputDir(final String inputName,
final File outputBaseDir) {
String name = inputName + "-" + System.currentTimeMillis() + "-split";
File rval = new File(outputBaseDir, name);
if (rval.exists()) {
log.warn("BUFR splitter output directory already exists, is a file being processed twice?");
}
return rval;
}
/**
* @return true if parser is not done parsing
* @throws IOException
*/
public boolean hasNext() throws IOException {
if (!structStack.isEmpty()) {
StructureLevel level = structStack.peek();
if (level.memberIter != null && level.memberIter.hasNext()) {
return true;
}
}
if (structIter != null && structIter.hasNext()) {
return true;
}
if (varIter != null && varIter.hasNext()) {
return true;
}
if (fileIndex < splitFiles.length) {
return true;
}
if (lastEvent != null && !lastEvent.equals(Event.END_FILE)) {
/* only one more event left, the end of the last file */
return true;
}
return false;
}
/**
* Get the next parsing event. hasNext() must be called before this method
* is called.
*
* @return
* @throws IOException
*/
public Event next() throws IOException {
Event rval;
if (!structStack.isEmpty()) {
rval = nextMember();
} else if (structIter != null && structIter.hasNext()) {
/* in a variable with a sequence of structures, get the next one */
rval = startStructure(structIter.next());
} else if (structIter != null && !structIter.hasNext()) {
/*
* this happens if the variable had an empty structure iterator.
* Structures are usually ended when there are no more members
*/
structIter = null;
rval = Event.END_STRUCTURE;
} else if (varIter != null) {
if (varIter.hasNext()) {
/* we are working through a bufr file, start the next variable */
rval = startVariable();
} else {
/* no more variables, we are at the end of the bufr file */
structIter = null;
currentVar = null;
varIter = null;
rval = endFile();
}
} else if (fileIndex < splitFiles.length) {
/* start the next bufr file */
rval = startFile();
} else if (lastEvent != null && !lastEvent.equals(Event.END_FILE)) {
rval = endFile();
} else {
/* don't set rval to null so we preserve the correct lastEvent */
return null;
}
lastEvent = rval;
return rval;
}
/**
* Process a member of the current structure. If the structure has no more
* members, the structure is ended
*
* @return
* @throws IOException
*/
private Event nextMember() throws IOException {
Event rval;
StructureLevel level = structStack.peek();
if (level.memberIter.hasNext()) {
/* in a level of a structure, get the next member */
Member m = level.memberIter.next();
level.currentMember = m;
DataType type = m.getDataType();
if (type.equals(DataType.STRUCTURE)) {
/* current member is a nested structure, start a new level */
StructureData struct = (StructureData) level.structure
.getScalarObject(m);
rval = startStructure(struct);
} else if (type.equals(DataType.SEQUENCE)) {
/* current member is a sequence of members, start a new level */
ArraySequence arr = level.structure.getArraySequence(m);
return startStructure(new StructureLevel(level.structure,
arr.getStructureMembers()));
} else {
/* current member is a field */
rval = Event.FIELD;
}
} else {
/* no more members of this structure level */
rval = endStructure();
}
return rval;
}
/**
* Start processing the next structure
*
* @param structure
* @return
* @throws IOException
*/
private Event startStructure(StructureData structure) throws IOException {
StructureLevel level = new StructureLevel(structure);
return startStructure(level);
}
/**
* Start processing the next structure
*
* @param level
* @return
* @throws IOException
*/
private Event startStructure(StructureLevel level) throws IOException {
structStack.push(level);
return Event.START_STRUCTURE;
}
/**
* Finalize processing for the current structure
*
* @return
* @throws IOException
*/
private Event endStructure() throws IOException {
structStack.pop();
if (structIter != null && !structIter.hasNext()) {
structIter = null;
}
return Event.END_STRUCTURE;
}
/**
* Start processing the next NetCDF variable
*
* @return
* @throws IOException
*/
private Event startVariable() throws IOException {
Event rval;
currentVar = varIter.next();
if (currentVar instanceof Structure) {
Structure s = (Structure) currentVar;
structIter = new StructIterator(s.getStructureIterator(),
s.getNumberOfMemberVariables());
if (structIter.hasNext()) {
rval = startStructure(structIter.next());
} else {
/*
* start an event for an empty structure, next event will be an
* end structure event
*/
rval = Event.START_STRUCTURE;
}
} else {
rval = Event.FIELD;
}
return rval;
}
/**
* Start processing the next NetCDF file
*
* @return
* @throws IOException
*/
private Event startFile() throws IOException {
File f = splitFiles[fileIndex];
fileIndex += 1;
currentNcfile = NetcdfFile.open(f.getAbsolutePath());
varIter = currentNcfile.getVariables().iterator();
return Event.START_FILE;
}
/**
* Finalize processing of NetCDF file
*
* @return
* @throws IOException
*/
private Event endFile() throws IOException {
if (currentNcfile != null) {
currentNcfile.close();
currentNcfile = null;
}
return Event.END_FILE;
}
/**
* @return null if no file is currently being processed
*/
public NetcdfFile getCurrentNcfile() {
return currentNcfile;
}
/**
* @return null if no file has started being processed
*/
public File getCurrentFile() {
if (fileIndex < splitFiles.length) {
return splitFiles[fileIndex];
} else {
return null;
}
}
/**
* @return null if no variable is currently being processed
*/
public Variable getCurrentVar() {
return currentVar;
}
/**
* @return null if no events have happened
*/
public Event getLastEvent() {
return lastEvent;
}
/**
* @return true if the current field is a member of a structure (as opposed
* to a variable field)
*/
private boolean fieldIsStructMember() {
/* struct members are kept on the stack */
return !structStack.isEmpty();
}
/**
* @return true if the current field is a scalar value
*/
public boolean fieldIsScalar() {
boolean rval = false;
if (fieldIsStructMember()) {
StructureLevel level = structStack.peek();
Member m = level.currentMember;
rval = m.isScalar();
} else if (currentVar != null) {
rval = currentVar.isScalar();
}
return rval;
}
/**
* @return unit string for field, may be null
*/
public String getFieldUnits() {
// TODO convert to standard edex units (javax.measure)?
String rval = null;
if (fieldIsStructMember()) {
StructureLevel level = structStack.peek();
rval = level.currentMember.getUnitsString();
} else if (currentVar != null) {
rval = currentVar.getUnitsString();
}
return rval;
}
/**
* @return name of current field
*/
public String getFieldName() {
String rval = null;
if (fieldIsStructMember()) {
StructureLevel level = structStack.peek();
rval = level.currentMember.getName();
} else if (currentVar != null) {
rval = currentVar.getFullName();
}
return rval;
}
/**
* @return type of current field
*/
public Class<?> getFieldType() {
DataType dtype = null;
if (fieldIsStructMember()) {
StructureLevel level = structStack.peek();
dtype = level.currentMember.getDataType();
} else if (currentVar != null) {
dtype = currentVar.getDataType();
}
/*
* not using DataType.getClassType() because it returns primitive types,
* we want to only work with objects
*/
switch (dtype) {
case BOOLEAN:
return Boolean.class;
case BYTE:
return Byte.class;
case CHAR:
return Character.class;
case SHORT:
return Short.class;
case INT:
return Integer.class;
case LONG:
return Long.class;
case FLOAT:
return Float.class;
case DOUBLE:
return Double.class;
case STRING:
return String.class;
default:
return dtype.getClassType();
}
}
/**
* Get scalar value of field.
*
* @param fieldType
* type retrieved from {@link BufrParser#getFieldType()}
* @return
* @throws IOException
*/
public <T> T getFieldScalarValue(Class<T> fieldType) throws IOException {
return getFieldScalarValue(fieldType, false);
}
/**
* Get scalar value of field.
*
* @param fieldType
* type retrieved from {@link BufrParser#getFieldType()}
* @param charArrayAsString
* if true, character array fields are converted to Strings
* @return
* @throws IOException
*/
@SuppressWarnings("unchecked")
public <T> T getFieldScalarValue(Class<T> fieldType,
boolean charArrayAsString) throws IOException {
TypedArray typedArray = readFieldAsArray();
if (typedArray == null) {
return null;
}
Array array = typedArray.array;
DataType type = typedArray.type;
T rval;
if (charArrayAsString && array.getSize() > 1
&& type.equals(DataType.CHAR)) {
int len = (int) array.getSize();
StringBuilder builder = new StringBuilder(len);
for (int i = 0; i < len; ++i) {
builder.append(array.getChar(i));
}
rval = (T) builder.toString();
} else {
rval = (T) array.getObject(0);
}
return rval;
}
/**
* Get field values as collection.
*
* @param fieldType
* type retrieved from {@link BufrParser#getFieldType()}
* @return
* @throws IOException
*/
@SuppressWarnings("unchecked")
public <T> Collection<T> getFieldCollection(Class<T> fieldType)
throws IOException {
TypedArray typedArray = readFieldAsArray();
if (typedArray == null) {
return null;
}
Array array = typedArray.array;
int len = (int) array.getSize();
Collection<T> rval = new ArrayList<T>(len);
for (int i = 0; i < len; ++i) {
rval.add((T) array.getObject(i));
}
return rval;
}
/*
* simple return value wrapper to pair a datatype with an array
*/
private static class TypedArray {
public final Array array;
public final DataType type;
public TypedArray(Array array, DataType type) {
this.array = array;
this.type = type;
}
}
/**
* Get field values as an array with the associated field datatype
*
* @return
* @throws IOException
*/
private TypedArray readFieldAsArray() throws IOException {
TypedArray rval = null;
if (fieldIsStructMember()) {
StructureLevel level = structStack.peek();
StructureData s = level.structure;
Member m = level.currentMember;
rval = new TypedArray(s.getArray(m), m.getDataType());
} else if (currentVar != null) {
rval = new TypedArray(currentVar.read(), currentVar.getDataType());
}
return rval;
}
/**
* clean up temporary files
*/
public void clean(){
for ( File f : splitFiles){
if (!f.delete()){
log.error("Unable to delete temporary file: " + f.getAbsolutePath());
}
}
File outdir = new File(options.getDirOut());
if (!outdir.delete()) {
log.error("Unable to delete temporary directory: "
+ outdir.getAbsolutePath());
}
}
}

80
edexOsgi/com.raytheon.uf.common.nc.bufr/src/com/raytheon/uf/common/nc/bufr/StructIterator.java Normal file
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@ -0,0 +1,80 @@
/**
* This software was developed and / or modified by Raytheon Company,
* pursuant to Contract DG133W-05-CQ-1067 with the US Government.
*
* U.S. EXPORT CONTROLLED TECHNICAL DATA
* This software product contains export-restricted data whose
* export/transfer/disclosure is restricted by U.S. law. Dissemination
* to non-U.S. persons whether in the United States or abroad requires
* an export license or other authorization.
*
* Contractor Name: Raytheon Company
* Contractor Address: 6825 Pine Street, Suite 340
* Mail Stop B8
* Omaha, NE 68106
* 402.291.0100
*
* See the AWIPS II Master Rights File ("Master Rights File.pdf") for
* further licensing information.
**/
package com.raytheon.uf.common.nc.bufr;
import java.io.IOException;
import ucar.ma2.StructureData;
import ucar.ma2.StructureDataIterator;
/**
* Wrapper to fix {@link StructureDataIterator}. Needed because calling
* {@link StructureDataIterator#hasNext()} when there is no more items throws an
* exception.
*
* <pre>
*
* SOFTWARE HISTORY
*
* Date Ticket# Engineer Description
* ------------ ---------- ----------- --------------------------
* Mar 19, 2014 2905 bclement Initial creation
*
* </pre>
*
* @author bclement
* @version 1.0
*/
public class StructIterator {
private final StructureDataIterator iter;
private final int totalVariable;
private int count = 0;
/**
* @param iter
* @param totalVariables
* total number of items in iter
*/
public StructIterator(StructureDataIterator iter, int totalVariables) {
this.iter = iter;
this.totalVariable = totalVariables;
}
/**
* @return true if there are more elements
* @throws IOException
*/
public boolean hasNext() throws IOException {
return count < totalVariable && iter.hasNext();
}
/**
* @return next element
* @throws IOException
*/
public StructureData next() throws IOException {
++count;
return iter.next();
}
}