BP107: Ten Lines Or Less: Interesting Things You Can Do In Java With Minimal Code

BP107: Ten Lines Or Less
Interesting Things You Can Do In
Java With Minimal Code
Julian Robichaux, panagenda
Kathy Brown, PSC Group

Why are we here?
▪ Java snippets for IBM Notes® and Domino®
- 10 lines or less
- beginner-to-intermediate level stuff
- hopefully useful
▪ Integration tips
- XPages only
- Gotchas
▪ Sample database
- http://www.runningnotes.net and/or http://nsftools.com/blog

The 10-Line Rules
Rule #1
The method signature is not part of the line count
public String getFoo() {
return "foo";
}
This only
counts as one
line

The 10-Line Rules
Rule #2
A single line with linefeeds added for readability is still just one line
public String getFoos() {
return "foo" +
"foo" +
"foofoofoo";
}
This only
counts as one
line

The 10-Line Rules
Rule #3
We make the rules
public String getFoot() {
Foot foot = new Foot();
foot.addToes(12).makeHairy();
return foot.toString();
}
This is as many
lines as we say
it is

The 10-Line Rules
Rule #4
Error handling and object cleanup has sometimes been omitted for brevity
PLEASE use good error handling in your production code

About the Sample Application
▪ As you travel, you can upload pictures from your smartphone to this app
▪ Upon upload, the app will:
- Read GPS data from the picture
- Use a web service to obtain the address
- Create a thumbnail of the photo
- Embed the thumbnail into a rich text field
▪ Other functionality:
- Return info as JSON
- Return info as a spreadsheet
- FTP to a server

GETTING STARTED
The basics. Where does this stuff go? How do we access Notes objects?

Where does our Java code live?
▪ How to add Java design elements to Code > Java and Code > Jars
- Jars can be copy/pasted, or dragged/dropped, or “Import Jar”
- Java classes can be copy/pasted, dragged/dropped, or “Create New Class” 
▪ What’s the difference?
- A Jar (Java ARchive) file is a file containing one or more Java classes

Where does our Java code live?
▪ NOTE: XPages only, agents are different
- Agents don’t have access to Java design elements 
▪ Just code for now, we’ll tackle external libraries later 
▪ Java code can also go in WebContent/WEB-INF/lib or on the host system
- Paul Calhoun and Paul Della-Nebbia have several slides on benefits of each location in their
Java Jumpstart, http://www.slideshare.net/Teamstudio/java-for-xpages-development

Java 1.5
▪ IBM Notes/Domino 8.5 and 9.0 uses Java 1.6 as a JVM
▪ Java design elements (for XPages) compile to version 1.5 by default
- Enhanced for loops
- Auto-boxing
- Enums
- Generics
▪ Java agents compile to version 1.2 by default
- Can be changed with notes.ini variable: JavaCompilerTarget
- Agents might not run on older clients or servers

Example: Getting Document Attachments [1]
public EmbeddedObject getFirstDocAttachment(Document doc)
throws NotesException {
Session session = doc.getParentDatabase().getParent();
Vector atts = session.evaluate("@AttachmentNames", doc);
String firstFile = (String)atts.get(0);
if (firstFile.length() > 0) {
EmbeddedObject eo = doc.getAttachment(firstFile);
return eo;
}
return null;
}
Here’s one
way to get a
Notes
Session
Everything else is
pretty much like
LotusScript

Example: Getting Document Attachments [2]
public EmbeddedObject getFirstRichTextAttachment(RichTextItem rtItem)
Vector atts = rtItem.getEmbeddedObjects();
for (Iterator iterator = atts.iterator(); iterator.hasNext();) {
EmbeddedObject eo = (EmbeddedObject) iterator.next();
if (eo.getType() == EmbeddedObject.EMBED_ATTACHMENT) {
return eo;
}
}
return null;
}
Notes API still uses
Vectors quite often
as return objects
Iterator loop, in
case you want to
use this in an agent

Passing Current Document and Calling Java
importPackage(com.lotusphere.bp107_2015);
var doc:NotesDocument = currentDocument.getDocument();
var eo:lotus.domino.EmbeddedObject = TenLinesOrLess.getFirstDocAttachment(doc)
public static EmbeddedObject getFirstDocAttachment(Document doc)
Vector atts = session.evaluate("@AttachmentNames", doc);
String firstFile = (String)atts.get(0);
if (firstFile.length() > 0) {
EmbeddedObject eo = doc.getAttachment(firstFile);
return eo;
}
return null;
}
JavaScript
Java

WORKING WITH FILES
Reading, writing, and accessing files. Permissions, considerations, and
working with byte arrays directly.

Basic File IO
▪ Java keeps improving file IO classes
- Java 1.5 added Closable interfaces
- Java 1.7 added java.nio.file classes (“Files” is especially useful)
- http://docs.oracle.com/javase/tutorial/essential/io/legacy.html  
▪ By default, Notes/Domino Java elements compile to Java 1.5 compatible code
- You can change to 1.6 in project properties, but this might break things
- No significant java.io changes in 1.6 anyway:  
http://docs.oracle.com/javase/6/docs/technotes/guides/io/enhancements.html

Example: Reading a Text File into a String [1]
public String readTextFileScanner(String fileName) throws IOException {
// Scanner can be flaky about sometimes not returning all the data,
// and can be slower because it's using regex internally
StringBuilder text = new StringBuilder();
String crlf = System.getProperty("line.separator");
Scanner scanner = new Scanner(new FileInputStream(fileName), "UTF-‐8");
while (scanner.hasNextLine()){
text.append(scanner.nextLine() + crlf);
}
scanner.close();
return text.toString();
} using the right
character set is
important!
Scanner can be flaky on large
strings, and you might be
replacing n with rn for linefeeds

Example: Reading a Text File into a String [2]
public String readTextFileReader(String fileName) throws IOException {
// StringBuilder is faster than StringBuffer because it's not
// synchronized
StringBuilder sb = new StringBuilder();
BufferedReader reader = new BufferedReader(
new InputStreamReader(new FileInputStream(fileName), "UTF-‐8"));
char[] buffer = new char[1024];
int size = 0;
while((size = reader.read(buffer)) != -‐1) {
sb.append(buffer, 0, size);
}
reader.close();
return sb.toString();
}
again with the
character seta tiny bit more work,
but slightly faster
and probably more
reliable

Example: Writing a File to Another File [1]
public void copyFileChannel(String fileToRead, String fileToWrite)
throws IOException {
// you should add try/finally blocks to make sure streams get closed
FileInputStream in = new FileInputStream(fileToRead);
FileOutputStream out = new FileOutputStream(fileToWrite, false);
// FileChannel is faster but generally uses more memory; you can
// control this somewhat by using FileChannel.map()
FileChannel channel1 = in.getChannel();
FileChannel channel2 = out.getChannel();
channel1.transferTo(0, channel1.size(), channel2);
// closing the streams also closes the channels
in.close();
out.close();
}
FileChannel is fast but uses more
memory. You can use memory mapping
(and more code) for better control.

Example: Writing a File to Another File [2]
public void copyFileStream(String fileToRead, String fileToWrite)
// you should add try/finally blocks to make sure streams get closed
FileInputStream in = new FileInputStream(fileToRead);
FileOutputStream out = new FileOutputStream(fileToWrite, false);
byte[] buffer = new byte[1024];
int size = 0;
while((size = in.read(buffer)) != -‐1) {
out.write(buffer, 0, size);
}
in.close();
out.close();
} Two extra lines of code, but
easier to stay in a smaller
memory footprint

Domino Server Permissions for File (and Network) Access
▪ Server doc, security fields
- EITHER: Unrestricted Methods
- OR: Sign XPages AND Run Restricted 
▪ Dangers of reading/writing files directly to the server
- No delete access?
- Forgetting to delete
- File contention
- Angry admins

Working Directly with Byte Arrays
▪ In some cases, we can work directly with byte arrays
- Potentially avoid file IO and/or restrictions entirely 
▪ Memory considerations
- It’s expensive to hold an entire file in memory
- Info and a few links about memory at the end of the presentation

Example: Accessing Embedded Objects [1]
EmbeddedObject eo = getFirstDocAttachment(doc);
File tempFile = File.createTempFile("eo-‐", ".tmp");
eo.extractFile(tempFile.getAbsolutePath());
After you’re done
with the file, you are
responsible for
deleting it
Easy way to create
a temp file in the
temp folder

Example: Accessing Embedded Objects [2]
EmbeddedObject eo = getFirstDocAttachment(doc);
InputStream in = new BufferedInputStream(eo.getInputStream());
After you’re done
with the
InputStream, you
are responsible
for closing it
This actually
creates a temp
file in the
background
BufferedInputStream
supports mark/reset
(and it sometimes
speeds things up)

EmbeddedObject Temp Files
▪ If your temp directory looks like this, EmbeddedObject.getInputStream() is the culprit
- Check your code for Exceptions or missing/misplaced InputStream.close()

Create a Thumbnail and Embed the Image
▪ Steps:
- Get the file attachment as an InputStream however you want
- Resize the image using Java ImageIO
- Re-attach the image to a rich text field 
▪ We will use a super-special magic technique to attach the image as an embedded image
instead of a file attachment 
▪ NOTE: Julian went into more detail about image resizing in a presentation with Mark Myers
last year:
- http://www.slideshare.net/panagenda/show104-practical-java-30838547

Example: Create the Thumbnail Image
public byte[] createThumbnail(InputStream in, float size)
BufferedImage bi = ImageIO.read(in);
float scale = Math.min(size/bi.getHeight(), size/bi.getWidth());
BufferedImage thumb = new BufferedImage(bi.getWidth(),
bi.getHeight(), bi.getType());
AffineTransformOp op = new AffineTransformOp
(AffineTransform.getScaleInstance(scale, scale),
AffineTransformOp.TYPE_BICUBIC);
thumb = op.filter(bi, thumb);
thumb = thumb.getSubimage(0, 0,
(int)(bi.getWidth()*scale), (int)(bi.getHeight()*scale));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(thumb, "jpg", baos);
return baos.toByteArray();
}
InputStream from an
EmbeddedObject or file
ByteArrayOutputStreams
are handy

Example: Create the Embedded Image in a MIME Field
public void embedImageMIME(Document doc, String fieldName,
byte[] imageData, String mimeType, String fileName)
MIMEEntity mime = doc.createMIMEEntity(fieldName);
MIMEHeader hdr = mime.createHeader("MIME-‐Version");
hdr.setHeaderValAndParams("1.0");
Stream stream = session.createStream();
stream.write(imageData);
// NOTE: JPG images must be MIME type "image/jpeg", not "image/jpg"
mime.setContentFromBytes(stream,
mimeType + "; name="" + fileName + """,
MIMEEntity.ENC_IDENTITY_BINARY);
doc.closeMIMEEntities(true, fieldName);
}
you just have to
add the data to
the MIME field
like this

Example: Create the Embedded Image in a Rich Text Field
public void embedImageRichText(RichTextItem rtitem,
byte[] imageData, String mimeType, String fileName)
Database db = rtitem.getParent().getParentDatabase();
Session session = db.getParent();
Document tempDoc = db.createDocument();
// for non-‐image MIME types, this will just be an attachment
embedImageMIME(tempDoc, "body", imageData, mimeType, fileName);
boolean isConvert = session.isConvertMime();
session.setConvertMime(true);
RichTextItem tempItem = (RichTextItem)tempDoc.getFirstItem("body");
session.setConvertMime(isConvert);
rtitem.appendRTItem(tempItem);
tempDoc.recycle();
}
setConvertMime is
what changes the
MIME data to an
embedded image

THIRD PARTY LIBRARIES
Options for adding and using third party libraries.

How to Add Third Party Libraries
▪ You can add them just like we did with our “own” code
- Drag/drop, copy/paste, import, etc. into Jars, Java or WebContent
- Sometimes the build path gets lost
• In Package Explorer, right-click, Build Path > Configure Build Path 
▪ You can create/use an OSGi plugin
- Here are some tutorials:
• http://www-10.lotus.com/ldd/ddwiki.nsf/dx/Creating_an_XPages_Library
• http://www-10.lotus.com/ldd/ddwiki.nsf/dx/Deploying_XPage_Libraries

How to Add Third Party Libraries
▪ You can put the JAR files in the /jvm/lib/ext directory
- Has to be on all servers the app is on
- Painful to make updates
- Admins don’t like this 
▪ Security
- Third party code is, well, third party, so use code from trusted sources, like apache.org
- Might require changes to java.policy or similar

metadata-extractor Library
▪ Open-source (Apache 2) library for reading EXIF data from photo files
- https://drewnoakes.com/code/exif/index.html
- https://github.com/drewnoakes/metadata-extractor/releases
- http://javadoc.metadata-extractor.googlecode.com/git/2.7.0/index.html  
▪ Time/date, GPS, camera type, exposure, etc.

Example: Get GPS Data from a Photo
public double[] getLatLong(InputStream in)
throws IOException, ImageProcessingException {
Metadata metadata = ImageMetadataReader.readMetadata(in);
GpsDirectory gpsDir =
(GpsDirectory)metadata.getDirectory(GpsDirectory.class);
if (gpsDir != null) {
GeoLocation gps = gpsDir.getGeoLocation();
double[] latLong =
new double[]{ gps.getLatitude(), gps.getLongitude() };
return latLong;
}
return null;
}
Easy way to populate
an array

Generating Barcodes and QR Codes
▪ ZXing library
- https://github.com/zxing/zxing
- Java and several other languages
- Open source, Apache 2.0 licensed 
▪ Create several different types of 1D and 2D barcodes
- UPC, EAN, Code 128, QR Code, etc.

Example: Create a QR Code
public byte[] createQrCode(String text, int size)
throws IOException, WriterException {
String charset = "ISO-‐8859-‐1";
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, charset);

MultiFormatWriter qwriter = new MultiFormatWriter();
BitMatrix qbits = qwriter.encode(text, BarcodeFormat.QR_CODE,
size, size, hints);
ByteArrayOutputStream out = new ByteArrayOutputStream();
MatrixToImageWriter.writeToStream(qbits, "png", out);
return out.toByteArray();
}
You could also write directly to a
file, embed this as an image, etc.
ISO-8859-1 is preferred for
QRCode text

ACCESSING WEB SITES
Making an HTTP connection, getting data, parsing XML

Connecting to External Websites
▪ URL classes (HTTP and HTTPS) are built-in to Java
- Apache HttpComponents are good if you need more fine-grained control
- http://hc.apache.org  
▪ Same security requirements as file access (see earlier slides) 
▪ Additional steps required for proxy servers
- and possibly HTTPS, if certificates are not allowed

Maps, Addresses, and Geocoding
▪ Many online mapping services available
▪ Be mindful of license restrictions and requirements
- Sometimes the free services aren’t free at all
- Especially if you’re a corporation
▪ OpenStreetMap is an open-source alternative
- License: http://www.openstreetmap.org/copyright
- Maps API: http://wiki.openstreetmap.org/wiki/Develop
- Geocoding: http://wiki.openstreetmap.org/wiki/Nominatim
- Usage Policy: http://wiki.openstreetmap.org/wiki/Nominatim_usage_policy

Example: Convert GPS Coordinates to Address (reverse geocoding)
public String getAddress(double latitude, double longitude) throws IOException {
URL url = new URL("http://nominatim.openstreetmap.org/reverse?format=xml" +
"&lat=" + latitude + "&lon=" + longitude + "&zoom=18&addressdetails=1");
InputStream in = url.openStream();

try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
org.w3c.dom.Document domDoc = factory.newDocumentBuilder().parse(in);
Node node = XPathAPI.selectSingleNode(domDoc,
"/reversegeocode/result/text()");
return node.getNodeValue();
} catch (Exception ignored) { in.close(); }
return null;
}
Make sure it’s “org.w3c.dom.Document”
and not lotus.domino.Document
Weirdly, this closes
the InputStream
after parsing

XML and XPath
▪ After your XML data has been parsed, you can:
- Step through the nodes to look for data (boring)
- Use XPath to search and extract specific nodes (fun!) 
▪ XPath is a kind of query language for searching through XML
- Also used with XSL 
▪ Getting started
- http://en.wikibooks.org/wiki/XPath/Basic_Syntax
- http://www.ibm.com/developerworks/xml/tutorials/x-xpath/x-xpath.html

OpenStreetMap Output and XPath
<?xml version="1.0" encoding="UTF-8"?>
<reversegeocode querystring="format=xml&lat=51.46483333333333&lon=-3.164&zoom=18&addressdetails=1"
attribution="Data © OpenStreetMap contributors, ODbL 1.0. http://www.openstreetmap.org/copyright" timestamp="Fri, 02 Jan 15
18:12:42 +0000">
<result lon="-3.1632088647976" lat="51.46474055" ref="Wales Millennium Centre" osm_id="26584146" osm_type="way"
place_id="60125628">Wales Millennium Centre, Roald Dahl Plass, Cardiff Bay, Cardiff, Wales, CF10 5AN, United Kingdom</result>
<addressparts>
<theatre>Wales Millennium Centre</theatre>
<pedestrian>Roald Dahl Plass</pedestrian>
<suburb>Cardiff Bay</suburb>
<city>Cardiff</city>
<county>Cardiff</county>
<state>Wales</state>
<postcode>CF10 5AN</postcode>
<country>United Kingdom</country>
<country_code>gb</country_code>
</addressparts>
</reversegeocode>
Node node = XPathAPI.selectSingleNode(domDoc,
"/reversegeocode/result/text()");

FTP
▪ For FTP, an easy (and small) library to use is Apache Commons Net
- http://commons.apache.org/proper/commons-net/index.html  
▪ Also supports FTPS, TFTP, and a few other protocols 
▪ SFTP is different
- try http://www.jcraft.com/jsch

Example: Upload a File via FTP
public boolean uploadFtpFile(String server, String ftpFilePath,
InputStream stream) throws IOException {
boolean result = false;
FTPClient ftp = new FTPClient();
ftp.connect(server);
if (FTPReply.isPositiveCompletion( ftp.getReplyCode() )) {
if (ftp.login("anonymous", "anonymous@example.com")) {
ftp.setFileType(FTP.BINARY_FILE_TYPE);
result = ftp.storeFile(ftpFilePath, stream);
}
ftp.disconnect();
}
return result;
}
ftpFilePath like “file.doc”
or “/subdir/file.doc”
this will fail if ftpFilePath refers
to a subdir that doesn’t exist, or
if the file already exists and you
don’t have delete rights

Create a Button on the XPage to upload the attached photo via FTP
<xp:button value="FTP File" id="button3" refreshMode="complete">
<xp:eventHandler event="onclick" submit="true" refreshMode="complete">
<xp:this.action><![CDATA[#{javascript:try {
var doc:lotus.domino.Document = currentDocument.getDocument(true);
var eo:lotus.domino.EmbeddedObject = TenLinesOrLess.getFirstDocAttachment(doc);
var stream:java.io.InputStream = eo.getInputStream();
var streamIsOpen = true;
TenLinesOrLess.uploadFtpFile("ftp.tardis.who", "/ftp/important.txt", stream);
} catch(e) {
_dump(e);
} finally {
if (streamIsOpen) {
stream.close();
}}}]]></xp:this.action></xp:eventHandler></xp:button>

XAGENTS AND OUTPUT
Using XAgents, collecting data, creating JSON, creating a spreadsheet,
sending info to the browser

What is an XAgent?
▪ What is it?
- An XPage that is not rendered, but can return JSON or XML or other data (like an agent does)
for use in charting, grids, exporting data, and more 
▪ How do you create one? It’s as easy as 1-2-3
- We will show two examples, returning JSON and returning an Excel file
• Step one - create an XPage
• Step two - set rendered=“false”
• Step three - add some code to return some data

JSON in Java
▪ No native JSON support in Java (until maybe Java 9), must use third-party libraries
▪ Lots of popular options
- gson, jackson, etc.
- see the list at json.org
▪ Libraries that use reflection to create JSON from Objects are nice, but they generally
cause AccessControlExceptions with IBM Domino because they use reflection
- and they’re relatively large if you just want to create a JSON string
▪ json-simple is a nice, small (simple) choice
- http://code.google.com/p/json-simple

Example: Creating JSON
public String createJson() {
HashMap values = new LinkedHashMap();
values.put("value1", "one");
values.put("value2", 2);

HashMap subValues = new LinkedHashMap();
subValues.put("subValue1", new Date());
subValues.put("subValue2", System.currentTimeMillis());
values.put("value3", subValues);

return JSONObject.toJSONString(values);
}
HashMaps are awesome, and
LinkedHashMap retains order
You can put
Maps inside
of Maps
Java 1.5 auto-boxing lets us
use int instead of Integer

The JSON XAgent
<xp:view xmlns:xp=“http://www.ibm.com/xsp/core" rendered="false">
<xp:this.afterRenderResponse>
<![CDATA[#{javascript:
importPackage(java.lang);
var myview:lotus.domino.View = database.getView("travelogvw");
var json = TenLinesOrLess.createJson(myview);
var externalContext = facesContext.getExternalContext();
var writer = facesContext.getResponseWriter();
var response = externalContext.getResponse();
response.setContentType("application/json");
response.setHeader("Cache-Control", "no-cache");
writer.write(json);
writer.endDocument()
}]]></xp:this.afterRenderResponse></xp:view>
Call the Java code
JavaScript for the XAgent
Send the data
Set the HTTP header
Don’t render the XPage

Spreadsheets and Apache POI
▪ The go-to Java library for generating Excel spreadsheets is Apache POI
- http://poi.apache.org 
▪ There are already a LOT of examples on how to use POI with XPages
- Please use your preferred search engine to discover them, we won’t play favorites 
▪ But, can we create a spreadsheet with 10 lines or less…?

Example: Create a Spreadsheet with Apache POI
public HSSFWorkbook createSpreadsheet(View view) throws NotesException {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet(view.getName());
ViewEntryCollection vc = view.getAllEntries();
for (ViewEntry ve = vc.getFirstEntry(); ve != null; ve = vc.getNextEntry()) {
HSSFRow row = sheet.createRow( sheet.getPhysicalNumberOfRows() );
for (int i = 0; i < ve.getColumnValues().size(); i++) {
row.createCell(i).setCellValue(ve.getColumnValues().get(i).toString());
}
}
return workbook;
}

Export XAgent
▪ Import different jar
importPackage(org.apache.poi.hssf.usermodel);
▪ Call the Java code
var wb:HSSFWorkbook = new HSSFWorkbook();
▪ HTTP header stuff so the browser knows it’s a spreadsheet
pageResponse.setContentType("application/x-‐ms-‐excel");
pageResponse.setHeader("Content-‐Disposition","inline; filename=" +
fileName);
▪ Send bytes instead of text
wb.write(pageResponse.getOutputStream());

POTENTIAL PROBLEMS
Security and access and memory

User Access versus Signer Access on XPages
▪ Pretty much just like you’d expect
- If users can’t access certain records, they still can’t access certain records
- The Notes Security model is the same 
▪ Use ExtLibUtil.getCurrentSessionAsSigner() to get SessionAsSigner 
▪ XPages security in general:
- http://www-10.lotus.com/ldd/ddwiki.nsf/dx/XPages_in_the_Notes_Client-Security

java.policy File
▪ The dreaded java.lang.SecurityException and java.security.AccessControlException 
▪ AccessController.doPrivileged(newPrivilegedAction() { code here } )
- http://lekkimworld.com/mView.action?entry=1371725987318
- Tricky, has to be called from a JAR in /ext or an OSGi bundle (read the whole article) 
▪ Julian’s article on java.policy:
- http://www.socialbizug.org/blogs/2ec5d0ed-d04e-4b18-9610-9819fcebca79/entry/
the_java_policy_file_in_ibm_domino?lang=en_us

Memory Errors
▪ notes.ini variable: HTTPJVMMaxHeapSize 
▪ Make sure you are using a 64-bit version of the Domino server
- “show server” at the Domino console should say “(64 bit)” for Windows 
▪ Helpful links
- http://www-10.lotus.com/ldd/dominowiki.nsf/dx/HTTPJVM_Out_of_memory
- http://www.xpageswiki.com/web/youatnotes/wiki-xpages.nsf/dx/
Memory_Usage_and_Performance

Engage Online
▪ SocialBiz User Group socialbizug.org
- Join the epicenter of Notes and Collaboration user groups
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THANK YOU
Julian Robichaux
jrobichaux@panagenda.com
http://panagenda.com
Kathy Brown
kathy@runningnotes.net
http://runningnotes.net

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