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  • How to clean-up an Entity Framework object context?

    - by Daniel Brückner
    I am adding several entities to an object context. try { forach (var document in documents) { this.Validate(document); // May throw a ValidationException. this.objectContext.AddToDocuments(document); } this.objectContext.SaveChanges(); } catch { // How to clean-up the object context here? throw; } If some of the documents pass the the validation and one fails, all documents that passed the validation remain added to the object context. I have to clean-up the object context because it may be reused and the following can happen. var documentA = new Document { Id = 1, Data = "ValidData" }; var documentB = new Document { Id = 2, Data = "InvalidData" }; var documentC = new Document { Id = 3, Data = "ValidData" }; try { // Adding document B will cause a ValidationException but only // after document A is added to the object context. this.DocumentStore.AddDocuments(new[] { documentA, documentB, documentC }); } catch (ValidationException) { } // Try again without the invalid document B. this.DocumentStore.AddDocuments(new[] { documentA, documentC }); This will again add document A to the object context and in consequence SaveChanges() will throw an exception because of a duplicate primary key. So I have to remove all already added documents in the case of an validation error. I could of course perform the validation first and only add all documents after they have been successfully validated. But sadly this does not solve the whole problem - if SaveChanges() fails all documents still remain add but unsaved. I tried to detach all objects returned by this.objectContext.ObjectStateManager.GetObjectStateEntries(EntityState.Added) but I am getting a exception stating that the object is not attached. So how do I get rid of all added but unsaved objects?

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  • Rails 3 - yield return or callback won't call in view <%= yield(:sidebar) || render('shared/sidebar'

    - by rzar
    Hey folks, I'm migrating a Website from Rails 2 (latest) to Rails 3 (beta2). Testing with Ruby 1.9.1p378 and Ruby 1.9.2dev (2010-04-05 trunk 27225) Stuck in a situation, i don't know which part will work well. Suspect yield is the problem, but don't know exactly. In my Layout Files I use the following technique quite often: app/views/layouts/application.html.erb: <%= yield(:sidebar) || render('shared/sidebar') %> For Example the partial look like: app/views/shared/_sidebar.html.erb: <p>Default sidebar Content. Bla Bla</p> Now it is time for the key part! In any view, I want to create a content_for block (optional). This can contain a pice of HTML etc. example below. If this block is set, the pice HTML inside should render in application.html.erb. If not, Rails should render the Partial at shared/_sidebar.html.erb on the right hand side. app/views/books/index.html.erb: <% content_for :sidebar do %> <strong>You have to read REWORK, a book from 37signals!</strong> <% end %> So you've got the idea. Hopefully. This technique worked well in any Rails 2.x Application. Now, in Rails 3 (beta2) only the yield Part is working. || render('shared/sidebar') The or side will not process by rails or maybe ruby. Thanks for input and time!

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  • Maintaing JTextArea scroll position

    - by Sami
    I have a JScrollPane with a JTextArea set as its view port. I update the (multi line) text shown on the JTextArea continously about once a second. Each time the text updates, JScrollPane goes all the way to the bottom of the text. Instead, I'd like to figure out the line number that is currently shown as the first line in the original text, and have that line be the first line shown when the text has been updated (or if the new text doesn't have that many lines, then scroll all the way to the bottom). My first attempt of doing this was to get the current caret position, figure the line based on that, and then set the text area to show that line: int currentPos = textArea.getCaretPosition(); int currentLine = 0; try { for(int i = 0; i < textArea.getLineCount(); i++) { if((currentPos >= textArea.getLineStartOffset(i)) && (currentPos < gameStateTextArea.getLineEndOffset(i))) { currentLine = i; break; } } } catch(Exception e) { } textArea.setText(text); int newLine = Math.min(currentLine, textArea.getLineCount()); int newOffset = 0; try { newOffset = textArea.getLineStartOffset(newLine); } catch(Exception e) { } textArea.setCaretPosition(newOffset); This was almost acceptable for my needs, but requires the user to click inside the text area to change the caret position, so that the scrolling will maintain state (which isn't nice). How would I do this using the (vertical) scroll position instead ?

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  • Creating a shim Stream

    - by spender
    A decompression API that I am using has the following API: Decode(Stream inStream,Stream outStream) I'd like to create a wrapper around this API, such that I can create my own Stream class which offers up the decoded data. Stream decodedStream=new BlaDecodeStream(inStream); So that I can than use this stream as a parameter to the XmlReader constructor in the same way one might use the System.IO.Compression.GZipStream. As far as I can tell, the only other option is set outStream stream to a MemoryStream or to a FileStream and go in two hops. The files I am dealing with are enormous, so neither of these options are particularly attractive. Before I go reinventing the wheel, is there any prior art that I might be able to draw from, or something in the BCL I might have missed? The CircularStream implementation here would go some of the way to helping, but I'm really looking for something similar that would block (as opposed to over/underrun) when the Stream's internal buffer is 'empty' when reading from it and block when the internal buffer is full when writing to it. In this way it could serve as parameter outStream and simultaneously (i.e. from another thread) could be read from by the XmlReader.

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  • Emphasized text in docbook, fo, pdf out put.

    - by Mica
    I am trying to emphasize a character of some static text to render into the footer of my pdf, but can't figure out the right combination of tags in my xsl. How can I accomplish this? Example: <!-- Footer content --> <xsl:template name="footer.content"> <xsl:param name="pageclass" select="''"/> <xsl:param name="sequence" select="''"/> <xsl:param name="position" select="''"/> <xsl:param name="gentext-key" select="''"/> <fo:block> <xsl:choose> ... <xsl:when test="$sequence = 'odd' and $position = 'left'"> <xsl:text>&#x00A9;<emphasis>My</emphasis>Company</xsl:text> </xsl:when> ... </xsl:choose> </fo:block> </xsl:template> This example generates an error in xsltproc. Help!

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  • Wpf progressbar not updating during method calculation

    - by djerry
    Hey guys, In my app, i have an import option, to read info from a .csv or .txt file and write it to a database. To test, i"m just using 200-300 lines of data. At the beginning of the method, i calculate number of objects/lines to be read. Every time an object is written to the database, i want to update my progressbar. This is how i do it : private void Update(string path) { double lines = 0; using (StreamReader reader = new StreamReader(path)) while ((reader.ReadLine()) != null) lines++; if (lines != 0) { double progress = 0; string lijn; double value = 0; List<User> users = new List<User>(); using (StreamReader reader = new StreamReader(path)) while ((line = reader.ReadLine()) != null) { progress++; value = (progress / lines) * 100.0; updateProgressBar(value); try { User user = ProcessLine(lijn); } catch (ArgumentOutOfRangeException) { continue; } catch (Exception) { continue; } } return; } else { //non relevant code } } To update my progressbar, i'm checking if i can change the ui of the progressbar like this : delegate void updateProgressbarCallback(double value); private void updateProgressBar(double value) { if (pgbImportExport.Dispatcher.CheckAccess() == false) { updateProgressbarCallback uCallBack = new updateProgressbarCallback(updateProgressBar); pgbImportExport.Dispatcher.Invoke(uCallBack, value); } else { Console.WriteLine(value); pgbImportExport.Value = value; } } When i!m looking at the output, the values are calculated correctly, but the progressbar is only showing changes after the method has been called completely, so when the job is done. That's too late to show feedback to the user. Can anyone help me solve this. EDIT : I'm also trying to show some text in labels to tell te user what is being done, and those aren't udpated till after the method is complete. Thanks in advance.

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  • FileInputStream throws NullPointerException.

    - by Mohamed
    I am getting nullpointerexception, don't know what actually is causing it. I read from java docs that fileinputstream only throws securityexception so don't understand why this exception pops up. here is my code snippet. private Properties prop = new Properties(); private String settings_file_name = "settings.properties"; private String settings_dir = "\\.autograder\\"; public Properties get_settings() { String path = this.get_settings_directory(); System.out.println(path + this.settings_dir + this.settings_file_name); if (this.settings_exist(path)) { try { FileInputStream in = new FileInputStream(path + this.settings_dir + this.settings_file_name); this.prop.load(in); in.close(); } catch (IOException e) { e.printStackTrace(); } } else { this.create_settings_file(path); try{ this.prop.load(new FileInputStream(path + this.settings_dir + this.settings_file_name)); }catch (IOException ex){ //ex.printStackTrace(); } } return this.prop; } private String get_settings_directory() { String user_home = System.getProperty("user.home"); if (user_home == null) { throw new IllegalStateException("user.home==null"); } return user_home; } and here is my stacktrace: C:\Users\mohamed\.autograder\settings.properties Exception in thread "main" java.lang.NullPointerException at autograder.Settings.get_settings(Settings.java:41) at autograder.Application.start(Application.java:20) at autograder.Main.main(Main.java:19) Java Result: 1 BUILD SUCCESSFUL (total time: 0 seconds) Line 41 is: this.prop.load(in);

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  • Robotium - Write to file in eclipse workspace or computer file system

    - by Flavio Capaccio
    I'm running some tests using Robotium on an Android application that interacts with a web-portal. I'd like to save some information to file; for example I need to save the id of the username I created from the app and I want to make it read from Selenium to run tests on web-portal to verify a webpage for that user has been created. Is it possible? Could someone suggest me a solution or a work-around? This is an example of code, but it doesn't work (I want to write to a file for example on c:\myworkspace\filename.txt a string): public void test_write_file(){ if(!solo.searchText("HOME")){ signIn("39777555333", VALID_PASSWORD); } try { String content = "This is the content to write into file"; File file = new File("filename.txt"); // if file doesnt exists, then create it if (!file.exists()) { file.createNewFile(); } FileWriter fw = new FileWriter(file.getAbsoluteFile()); BufferedWriter bw = new BufferedWriter(fw); bw.write(content); bw.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } assertTrue(solo.searchText("HOME")); }

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  • How to serialize List<object>

    - by afin
    I am writing common functions to serialize the given object and List<object> as follows public string SerializeObject(Object pObject)// for given object { try { String XmlizedString = null; MemoryStream memoryStream = new MemoryStream(); XmlSerializer xs = new XmlSerializer(typeof(pObject)); XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8); xs.Serialize(xmlTextWriter, pObject); memoryStream = (MemoryStream)xmlTextWriter.BaseStream; XmlizedString = UTF8ByteArrayToString(memoryStream.ToArray()); return XmlizedString; } catch (Exception e) { System.Console.WriteLine(e); return null; } } public string SerializeObject(List<Object> pObject)// for given List<object> { try { String XmlizedString = null; MemoryStream memoryStream = new MemoryStream(); XmlSerializer xs = new XmlSerializer(typeof(pObject)); XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8); xs.Serialize(xmlTextWriter, pObject); memoryStream = (MemoryStream)xmlTextWriter.BaseStream; XmlizedString = UTF8ByteArrayToString(memoryStream.ToArray()); return XmlizedString; } catch (Exception e) { System.Console.WriteLine(e); return null; } } first one is working fine. If I pass any type, it is successfully returning xml string. But second one is throwing error. what could be wrong?

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  • How to get a file path from c drive in android

    - by Thomas Mathew
    I was trying to extract the content of a pdf file and display its content in android. I tired the code in java and it worked.But when i am coding it in android, its not displaying anything. I think, its not getting the file path. Is there any way by which i could get a file stored in c drive and store its path in a string? The code is given below: public class hello extends Activity { /** Called when the activity is first created. */ private static String INPUTFILE = "FirstPdf.pdf"; String str; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); try { Document document = new Document(); document.open(); PdfReader reader = new PdfReader(INPUTFILE); int n = reader.getNumberOfPages(); str=PdfTextExtractor.getTextFromPage(reader, 2); } catch (IOException e) { //e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } TextView tv = new TextView(this); tv.setText(str); setContentView(tv); } } I would be very grateful if the problem is solved.

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  • Latex: Listings with monospace fonts

    - by Nils
    This is what the code looks in Xcode. And this in my listing created with texlive. And yes I used basicstyle=\ttfamily . Having looked at the manual of listings I haven't found anything about fixed-with or monospace fonts.. Example to reproduce \documentclass[ article, a4paper, a4wide, %draft, smallheadings ]{book} % Packages below \usepackage{graphicx} \usepackage{verbatim} % used to display code \usepackage{hyperref} \usepackage{fullpage} \usepackage[ansinew]{inputenc} % german umlauts \usepackage[usenames,dvipsnames]{color} \usepackage{float} \usepackage{subfig} \usepackage{tikz} \usetikzlibrary{calc,through,backgrounds} \usepackage{fancyvrb} \usepackage{acronym} \usepackage{amsthm} % Uuhhh yet another package \VerbatimFootnotes % Required, otherwise verbatim does not work in footnotes! \usepackage{listings} \definecolor{Brown}{cmyk}{0,0.81,1,0.60} \definecolor{OliveGreen}{cmyk}{0.64,0,0.95,0.40} \definecolor{CadetBlue}{cmyk}{0.62,0.57,0.23,0} \definecolor{lightlightgray}{gray}{0.9} \begin{document} \lstset{ language=C, % Code langugage basicstyle=\ttfamily, % Code font, Examples: \footnotesize, \ttfamily keywordstyle=\color{OliveGreen}, % Keywords font ('*' = uppercase) commentstyle=\color{gray}, % Comments font numbers=left, % Line nums position numberstyle=\tiny, % Line-numbers fonts stepnumber=1, % Step between two line-numbers numbersep=5pt, % How far are line-numbers from code backgroundcolor=\color{lightlightgray}, % Choose background color frame=none, % A frame around the code tabsize=2, % Default tab size captionpos=b, % Caption-position = bottom breaklines=true, % Automatic line breaking? breakatwhitespace=false, % Automatic breaks only at whitespace? showspaces=false, % Dont make spaces visible showtabs=false, % Dont make tabls visible columns=flexible, % Column format morekeywords={__global__, __device__}, % CUDA specific keywords } \begin{lstlisting} As[threadRow][threadCol] = A[ threadCol + threadRow * Awidth // Adress of the thread in the current block + i * BLOCK_SIZE // Pick a block further left for i+1 + blockRow * BLOCK_SIZE * Awidth // for blockRow +1 go one blockRow down ]; \end{lstlisting} \end{document}

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  • Error "Input length must be multiple of 8 when decrypting with padded cipher"

    - by Ross Peoples
    I am trying to move a project from C# to Java for a learning exercise. I am still very new to Java, but I have a TripleDES class in C# that encrypts strings and returns a string value of the encrypted byte array. Here is my C# code: using System; using System.IO; using System.Collections.Generic; using System.Security.Cryptography; using System.Text; namespace tDocc.Classes { /// <summary> /// Triple DES encryption class /// </summary> public static class TripleDES { private static byte[] key = { 110, 32, 73, 24, 125, 66, 75, 18, 79, 150, 211, 122, 213, 14, 156, 136, 171, 218, 119, 240, 81, 142, 23, 4 }; private static byte[] iv = { 25, 117, 68, 23, 99, 78, 231, 219 }; /// <summary> /// Encrypt a string to an encrypted byte array /// </summary> /// <param name="plainText">Text to encrypt</param> /// <returns>Encrypted byte array</returns> public static byte[] Encrypt(string plainText) { UTF8Encoding utf8encoder = new UTF8Encoding(); byte[] inputInBytes = utf8encoder.GetBytes(plainText); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateEncryptor(key, iv); MemoryStream encryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(encryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); encryptedStream.Position = 0; byte[] result = new byte[encryptedStream.Length]; encryptedStream.Read(result, 0, (int)encryptedStream.Length); cryptStream.Close(); return result; } /// <summary> /// Decrypt a byte array to a string /// </summary> /// <param name="inputInBytes">Encrypted byte array</param> /// <returns>Decrypted string</returns> public static string Decrypt(byte[] inputInBytes) { UTF8Encoding utf8encoder = new UTF8Encoding(); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateDecryptor(key, iv); MemoryStream decryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(decryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); decryptedStream.Position = 0; byte[] result = new byte[decryptedStream.Length]; decryptedStream.Read(result, 0, (int)decryptedStream.Length); cryptStream.Close(); UTF8Encoding myutf = new UTF8Encoding(); return myutf.GetString(result); } /// <summary> /// Decrypt an encrypted string /// </summary> /// <param name="text">Encrypted text</param> /// <returns>Decrypted string</returns> public static string DecryptText(string text) { if (text == "") { return text; } return Decrypt(Convert.FromBase64String(text)); } /// <summary> /// Encrypt a string /// </summary> /// <param name="text">Unencrypted text</param> /// <returns>Encrypted string</returns> public static string EncryptText(string text) { if (text == "") { return text; } return Convert.ToBase64String(Encrypt(text)); } } /// <summary> /// Random number generator /// </summary> public static class RandomGenerator { /// <summary> /// Generate random number /// </summary> /// <param name="length">Number of randomizations</param> /// <returns>Random number</returns> public static int GenerateNumber(int length) { byte[] randomSeq = new byte[length]; new RNGCryptoServiceProvider().GetBytes(randomSeq); int code = Environment.TickCount; foreach (byte b in randomSeq) { code += (int)b; } return code; } } /// <summary> /// Hash generator class /// </summary> public static class Hasher { /// <summary> /// Hash type /// </summary> public enum eHashType { /// <summary> /// MD5 hash. Quick but collisions are more likely. This should not be used for anything important /// </summary> MD5 = 0, /// <summary> /// SHA1 hash. Quick and secure. This is a popular method for hashing passwords /// </summary> SHA1 = 1, /// <summary> /// SHA256 hash. Slower than SHA1, but more secure. Used for encryption keys /// </summary> SHA256 = 2, /// <summary> /// SHA348 hash. Even slower than SHA256, but offers more security /// </summary> SHA348 = 3, /// <summary> /// SHA512 hash. Slowest but most secure. Probably overkill for most applications /// </summary> SHA512 = 4, /// <summary> /// Derrived from MD5, but only returns 12 digits /// </summary> Digit12 = 5 } /// <summary> /// Hashes text using a specific hashing method /// </summary> /// <param name="text">Input text</param> /// <param name="hash">Hash method</param> /// <returns>Hashed text</returns> public static string GetHash(string text, eHashType hash) { if (text == "") { return text; } if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.Digit12) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); string newHash = ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); return newHash.Substring(0, 12); } return ""; } /// <summary> /// Generates a hash based on a file's contents. Used for detecting changes to a file and testing for duplicate files /// </summary> /// <param name="info">FileInfo object for the file to be hashed</param> /// <param name="hash">Hash method</param> /// <returns>Hash string representing the contents of the file</returns> public static string GetHash(FileInfo info, eHashType hash) { FileStream hashStream = new FileStream(info.FullName, FileMode.Open, FileAccess.Read); string hashString = ""; if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } hashStream.Close(); hashStream.Dispose(); hashStream = null; return hashString; } /// <summary> /// Converts a byte array to a hex string /// </summary> /// <param name="data">Byte array</param> /// <returns>Hex string</returns> public static string ByteToHex(byte[] data) { StringBuilder builder = new StringBuilder(); foreach (byte hashByte in data) { builder.Append(string.Format("{0:X1}", hashByte)); } return builder.ToString(); } /// <summary> /// Converts a hex string to a byte array /// </summary> /// <param name="hexString">Hex string</param> /// <returns>Byte array</returns> public static byte[] HexToByte(string hexString) { byte[] returnBytes = new byte[hexString.Length / 2]; for (int i = 0; i <= returnBytes.Length - 1; i++) { returnBytes[i] = byte.Parse(hexString.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber); } return returnBytes; } } } And her is what I've got for Java code so far, but I'm getting the error "Input length must be multiple of 8 when decrypting with padded cipher" when I run the test on this: import java.security.InvalidAlgorithmParameterException; import java.security.InvalidKeyException; import javax.crypto.Cipher; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import com.tdocc.utils.Base64; public class TripleDES { private static byte[] keyBytes = { 110, 32, 73, 24, 125, 66, 75, 18, 79, (byte)150, (byte)211, 122, (byte)213, 14, (byte)156, (byte)136, (byte)171, (byte)218, 119, (byte)240, 81, (byte)142, 23, 4 }; private static byte[] ivBytes = { 25, 117, 68, 23, 99, 78, (byte)231, (byte)219 }; public static String encryptText(String plainText) { try { if (plainText.isEmpty()) return plainText; return Base64.decode(TripleDES.encrypt(plainText)).toString(); } catch (Exception e) { e.printStackTrace(); } return null; } public static byte[] encrypt(String plainText) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchPaddingException { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, iv); final byte[] plainTextBytes = plainText.getBytes("utf-8"); final byte[] cipherText = cipher.doFinal(plainTextBytes); return cipherText; } catch (Exception e) { e.printStackTrace(); } return null; } public static String decryptText(String message) { try { if (message.isEmpty()) return message; else return TripleDES.decrypt(message.getBytes()); } catch (Exception e) { e.printStackTrace(); } return null; } public static String decrypt(byte[] message) { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, key, iv); final byte[] plainText = cipher.doFinal(message); return plainText.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } }

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  • Getting mail from GMail into Java application using IMAP

    - by Dave
    I want to access messages in GMail from a Java application using JavaMail and IMAP. Why am I getting a SocketTimeoutException? Here is my code: Properties props = System.getProperties(); props.setProperty("mail.imap.host", "imap.gmail.com"); props.setProperty("mail.imap.port", "993"); props.setProperty("mail.imap.connectiontimeout", "5000"); props.setProperty("mail.imap.timeout", "5000"); try { Session session = Session.getDefaultInstance(props, new MyAuthenticator()); URLName urlName = new URLName("imap://[email protected]:[email protected]"); Store store = session.getStore(urlName); if (!store.isConnected()) { store.connect(); } } catch (NoSuchProviderException e) { e.printStackTrace(); System.exit(1); } catch (MessagingException e) { e.printStackTrace(); System.exit(2); } I set the timeout values so that it wouldn't take "forever" to timeout. Also, MyAuthenticator also has the username and password, which seems redundant with the URL. Is there another way to specify the protocol? (I didn't see it in the JavaDoc for IMAP.)

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  • Toggle Android emulator network traffic from emulator invocation

    - by highphi
    I'm working on scripts to manage large amounts of Android emulators and I need to disable all network traffic on some of them. Because I'm doing all of this on a headless server, I cannot use the F8 hotkey described on the emulater documentation. I'm currently routing the TCP traffic through a null proxy with by using emulator-arm ... -http-proxy 0.0.0.0:0 and this blocks the traffic that I want it to. I thought this was working well until I noticed some strange error messages while running my scripts. The console started outputting accept too many open files and checking the open files with lsof reveals numerous messages stating "can't identify protocol" ... emulator- 19463 username 19u sock 0,6 0t0 1976595845 can't identify protocol emulator- 19463 username 20u sock 0,6 0t0 1976595847 can't identify protocol ... The only "solution" I found to this is to kill all of the emulators and then wait until this limit is reached again, which is hardly a solution at all. Is there another way to do this while invoking the emulator? Am I incorrectly using the -htt-proxy switch to block the traffic? Other people found solutions to block traffic by manually doing this by using airplane mode, but this isn't feasible for me as I'm controlling emulators via scripts. I could send keyevents to the emulator with my script and turn the phone on in airplane mode, but I would prefer something more reliable than this.

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  • Big problem with regular expression in Lex (lexical analyzer)

    - by Nazgulled
    Hi, I have some content like this: author = "Marjan Mernik and Viljem Zumer", title = "Implementation of multiple attribute grammar inheritance in the tool LISA", year = 1999 author = "Manfred Broy and Martin Wirsing", title = "Generalized Heterogeneous Algebras and Partial Interpretations", year = 1983 author = "Ikuo Nakata and Masataka Sassa", title = "L-Attributed LL(1)-Grammars are LR-Attributed", journal = "Information Processing Letters" And I need to catch everything between double quotes for title. My first try was this: ^(" "|\t)+"title"" "*=" "*"\"".+"\"," Which catches the first example, but not the other two. The other have multiple lines and that's the problem. I though about changing to something with \n somewhere to allow multiple lines, like this: ^(" "|\t)+"title"" "*=" "*"\""(.|\n)+"\"," But this doesn't help, instead, it catches everything. Than I though, "what I want is between double quotes, what if I catch everything until I find another " followed by ,? This way I could know if I was at the end of the title or not, no matter the number of lines, like this: ^(" "|\t)+"title"" "*=" "*"\""[^"\""]+"," But this has another problem... The example above doesn't have it, but the double quote symbol (") can be in between the title declaration. For instance: title = "aaaaaaa \"X bbbbbb", And yes, it will always be preceded by a backslash (\). Any suggestions to fix this regexp?

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  • C++ Exceptions and Inheritance from std::exception

    - by fbrereto
    Given this sample code: #include <iostream> #include <stdexcept> class my_exception_t : std::exception { public: explicit my_exception_t() { } virtual const char* what() const throw() { return "Hello, world!"; } }; int main() { try { throw my_exception_t(); } catch (const std::exception& error) { std::cerr << "Exception: " << error.what() << std::endl; } catch (...) { std::cerr << "Exception: unknown" << std::endl; } return 0; } I get the following output: Exception: unknown Yet simply making the inheritance of my_exception_t from std::exception public, I get the following output: Exception: Hello, world! Could someone please explain to me why the type of inheritance matters in this case? Bonus points for a reference in the standard.

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  • Zend framework "invalid controller" error message

    - by stef
    When I load the homepage of a ZF site I get a message saying "Invalid controller specified (error)" where "error" seems to be the name of the controller. In my bootstrap.php I have the snippet below where I added the prints statement in the catch(): // Dispatch the request using the front controller. try { $frontController->dispatch(); } catch (Exception $exception) { print $exception; exit; exit($exception->getMessage()); } This prints out: exception 'Zend_Controller_Dispatcher_Exception' with message 'Invalid controller specified (error)' in /www/common/ZendFramework/library16/Zend/Controller/Dispatcher/Standard.php:241 Stack trace: #0 /www/common/ZendFramework/library16/Zend/Controller/Front.php(934): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http)) #1 /www/site.com/htdocs/application/bootstrap.php(38): Zend_Controller_Front->dispatch() #2 /www/site.com/htdocs/public/index.php(16): require('/www/site....') #3 {main} Can anyone make sense out of what it going on? I have a hunch it has something to do with case sensitivity and the naming conventions of ZF. The initial "invalid controller" message comes from the snippet below print $request->getControllerName(); if (!$this->isDispatchable($request)) { $controller = $request->getControllerName(); if (!$this->getParam('useDefaultControllerAlways') && !empty($controller)) { require_once 'Zend/Controller/Dispatcher/Exception.php'; throw new Zend_Controller_Dispatcher_Exception('Invalid controller specified (' . $request->getControllerName() . ')'); } $className = $this->getDefaultControllerClass($request); } This all prints out "indexerrorInvalid controller specified (error)" so it looks like it's trying to load the index controller first, can not and then has a problem loading the error controller. Could it just be that the path to the controller files is wrong?

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  • Track "commands" send to WPF window by touchpad (Bamboo)

    - by Christian
    Hi, I just bought a touchpad wich allows drawing and using multitouch. The api is not supported fully by windows 7, so I have to rely on the build in config dialog. The basic features are working, so if I draw something in my WPF tool, and use both fingers to do a right click, I can e.g. change the color. What I want to do now is assign other functions to special features in WPF. Does anybody know how to find out in what way the pad communicates with the app? It works e.g. in Firefox to scroll, like it should (shown on this photo). But I do not know how to hookup the scroll event, I tried a Scrollviewer (which ignores my scroll attempts) and I also hooked up an event with the keypressed, but it does not fire (I assume the pad does not "press a key" but somehow sends the "scroll" command direclty. How can I catch that command in WPF? Thanks a lot, Chris [EDIT] I got the scroll to work, but only up and down, not left and right. It was just a stupid "listbox in scrollviewer" mistake. But still not sure about commands like ZOOM in (which is working even in paint).. Which API contains such things? [EDIT2] Funny, the zoom works in Firefox, the horizontal scrolling does not. But, in paint, the horizontal scrolling works... [EDIT 3] Just asked in the wacom forum, lets see about vendor support reaction time... http://forum.wacom.eu/viewtopic.php?f=4&t=1939 Here is a picture of the config surface to get the idea what I am talking about: (Bamboo settings, I try to catch these commands in WPF)

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  • search data from FileReader in Java

    - by maya
    hi I'm new in java how to read and search data from file (txt) and then display the data in TextArea or Jtable. for example I have file txt contains data and I need to display this data in textarea after I clicked a button, I have used FileReader , and t1 t2 tp are attributes in the file import java.io.FileReader; import java.io.IOException; String t1,t2,tp; Ffile f1= new Ffile(); FileReader fin = new FileReader("test2.txt"); Scanner src = new Scanner(fin); while (src.hasNext()) { t1 = src.next(); textarea.setText(t1); t2 = src.next(); textarea.setText(t2); tp = src.next(); textarea.setText(tp); f1.insert(t1,t2,tp); } fin.close(); also I have used the inputstream DataInputStream dis = null; String dbRecord = null; try { File f = new File("text2.text"); FileInputStream fis = new FileInputStream(f); BufferedInputStream bis = new BufferedInputStream(fis); dis = new DataInputStream while ( (dbRecord = dis.readLine()) != null) { StringTokenizer st = new StringTokenizer(dbRecord, ":"); String t1 = st.nextToken(); String t2 = st.nextToken(); String tp = st.nextToken(); textarea.setText(textarea.getText()+t1); textarea.setText(textarea.getText()+t2); textarea.setText(textarea.getText()+tp); } } catch (IOException e) { // catch io errors from FileInputStream or readLine() System.out.println("Uh oh, got an IOException error: " + e.getMessage()); } finally { } but both of them don't work ,so please any one help me I want to know how to read data and also search it from file and i need to display the data in textarea . thanks in advance

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  • Establishing Upper / Lower Bound in T-SQL Procedure

    - by Code Sherpa
    Hi. I am trying to establish upper / lower bound in my stored procedure below and am having some problems at the end (I am getting no results where, without the temp table inner join i get the expected results). I need some help where I am trying to join the columns in my temp table #PageIndexForUsers to the rest of my join statement and I am mucking something up with this statement: INNER JOIN #PageIndexForUsers ON ( dbo.aspnet_Users.UserId = #PageIndexForUsers.UserId AND #PageIndexForUsers.IndexId >= @PageLowerBound AND #PageIndexForUsers.IndexId <= @PageUpperBound ) I could use feedback at this point - and, any advice on how to improve my procedure's logic (if you see anything else that needs improvement) is also appreciated. Thanks in advance... ALTER PROCEDURE dbo.wb_Membership_GetAllUsers @ApplicationName nvarchar(256), @sortOrderId smallint = 0, @PageIndex int, @PageSize int AS BEGIN DECLARE @ApplicationId uniqueidentifier SELECT @ApplicationId = NULL SELECT @ApplicationId = ApplicationId FROM dbo.aspnet_Applications WHERE LOWER(@ApplicationName) = LoweredApplicationName IF (@ApplicationId IS NULL) RETURN 0 -- Set the page bounds DECLARE @PageLowerBound int DECLARE @PageUpperBound int DECLARE @TotalRecords int SET @PageLowerBound = @PageSize * @PageIndex SET @PageUpperBound = @PageSize - 1 + @PageLowerBound BEGIN TRY -- Create a temp table TO store the select results CREATE TABLE #PageIndexForUsers ( IndexId int IDENTITY (0, 1) NOT NULL, UserId uniqueidentifier ) -- Insert into our temp table INSERT INTO #PageIndexForUsers (UserId) SELECT u.UserId FROM dbo.aspnet_Membership m, dbo.aspnet_Users u WHERE u.ApplicationId = @ApplicationId AND u.UserId = m.UserId ORDER BY u.UserName SELECT @TotalRecords = @@ROWCOUNT SELECT dbo.wb_Profiles.profileid, dbo.wb_ProfileData.firstname, dbo.wb_ProfileData.lastname, dbo.wb_Email.emailaddress, dbo.wb_Email.isconfirmed, dbo.wb_Email.emaildomain, dbo.wb_Address.streetname, dbo.wb_Address.cityorprovince, dbo.wb_Address.state, dbo.wb_Address.postalorzip, dbo.wb_Address.country, dbo.wb_ProfileAddress.addresstype,dbo.wb_ProfileData.birthday, dbo.wb_ProfileData.gender, dbo.wb_Session.sessionid, dbo.wb_Session.lastactivitydate, dbo.aspnet_Membership.userid, dbo.aspnet_Membership.password, dbo.aspnet_Membership.passwordquestion, dbo.aspnet_Membership.passwordanswer, dbo.aspnet_Membership.createdate FROM dbo.wb_Profiles INNER JOIN dbo.wb_ProfileAddress ON ( dbo.wb_Profiles.profileid = dbo.wb_ProfileAddress.profileid AND dbo.wb_ProfileAddress.addresstype = 'home' ) INNER JOIN dbo.wb_Address ON dbo.wb_ProfileAddress.addressid = dbo.wb_Address.addressid INNER JOIN dbo.wb_ProfileData ON dbo.wb_Profiles.profileid = dbo.wb_ProfileData.profileid INNER JOIN dbo.wb_Email ON ( dbo.wb_Profiles.profileid = dbo.wb_Email.profileid AND dbo.wb_Email.isprimary = 1 ) INNER JOIN dbo.wb_Session ON dbo.wb_Profiles.profileid = dbo.wb_Session.profileid INNER JOIN dbo.aspnet_Membership ON dbo.wb_Profiles.userid = dbo.aspnet_Membership.userid INNER JOIN dbo.aspnet_Users ON dbo.aspnet_Membership.UserId = dbo.aspnet_Users.UserId INNER JOIN dbo.aspnet_Applications ON dbo.aspnet_Users.ApplicationId = dbo.aspnet_Applications.ApplicationId INNER JOIN #PageIndexForUsers ON ( dbo.aspnet_Users.UserId = #PageIndexForUsers.UserId AND #PageIndexForUsers.IndexId >= @PageLowerBound AND #PageIndexForUsers.IndexId <= @PageUpperBound ) ORDER BY CASE @sortOrderId WHEN 1 THEN dbo.wb_ProfileData.lastname WHEN 2 THEN dbo.wb_Profiles.username WHEN 3 THEN dbo.wb_Address.postalorzip WHEN 4 THEN dbo.wb_Address.state END END TRY BEGIN CATCH IF @@TRANCOUNT > 0 ROLLBACK TRAN EXEC wb_ErrorHandler RETURN 55555 END CATCH RETURN @TotalRecords END GO

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  • which xml validator will work perfectly for multithreading project

    - by Sunil Kumar Sahoo
    Hi All, I have used jdom for xml validation against schema. The main problem there is that it gives an error FWK005 parse may not be called while parsing The main reason was that multiple of threads working for xerces validation at the same time. SO I got the solution that i have to lock that validation. which is not good So I want to know which xml validator works perfectly for multithreading project public static HashMap validate(String xmlString, Validator validator) { HashMap<String, String> map = new HashMap<String, String>(); long t1 = System.currentTimeMillis(); DocumentBuilder builder = null; try { //obtain lock to proceed // lock.lock(); try { builder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); // Source source = new DOMSource(builder.parse(new ByteArrayInputStream(xmlString.getBytes()))); validator.validate(new StreamSource(new StringReader(xmlString))); map.put("ISVALID", "TRUE"); logger.info("We have successfuly validated the schema"); } catch (Exception ioe) { ioe.printStackTrace(); logger.error("NOT2 VALID STRING IS :" + xmlString); map.put("MSG", ioe.getMessage()); // logger.error("IOException while validating the input XML", ioe); } logger.info(map); long t2 = System.currentTimeMillis(); logger.info("XML VALIDATION TOOK:::" + (t2 - t1)); } catch (Exception e) { logger.error(e); } finally { //release lock // lock.unlock(); builder = null; } return map; } Thanks Sunil Kumar Sahoo

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  • Use any CSS compiler (Sass, Less) to generate the selector

    - by xckpd7
    So I've recently been playing around with CSS compilers, but I have no idea how (or if it's possible) to dynamically generate pieces of a selector. For instance, let's say I wanted to make mixins to get display: inline-block; to work cross browser. I would have to do the styles, yeah, but I would have to do the IE6/7 selector hacks to get them to work in those browsers too. Ideally I'm looking for a one off thing to add to an element and have the ability for that to work. Some kind person recently gave me this solution: http://stackoverflow.com/questions/2746754/css-compilers-and-converting-ie-hacks-to-conditional-css/2747036#2747036 and it would be nice to implement that in a minimal way that would allow me to specify it for a given element and be on my way (for instance in Less, you can create a class with styles, pass that class to another element, and that element will inherit all of those styles. It would be nice to pass an element .inline-block; and it create the styles needed to support IE6/7 without having to resort to stuff like _color: pink; Any ideas? EDIT: for instance as well, how could I do something like clearfix for LESS? (lesscss.org)? If Sass can only do it then that will work too.

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  • Delphi 2009: How do I prevent network application from leaking critical section?

    - by eed3si9n
    As part of Vista certification, Microsoft wants to make sure that an application exits without holding on to a lock (critical section): TEST CASE 31. Verify application does not break into a debugger with the specified AppVerifier checks (Req:3.2) As it turns out, network applications built using Delphi 2009 does break into the debugger, which displays unhelpful message as follows: (1214.1f10): Break instruction exception - code 80000003 (first chance) eax=00000001 ebx=07b64ff8 ecx=a6450000 edx=0007e578 esi=0017f7e0 edi=80000003 eip=77280004 esp=0017f780 ebp=0017f7ac iopl=0 nv up ei pl zr na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246 *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Windows\SysWOW64\ntdll.dll - ntdll!DbgBreakPoint: 77280004 cc int 3 After hitting Go button several times, you come across the actual error: ======================================= VERIFIER STOP 00000212: pid 0x18A4: Freeing virtual memory containing an active critical section. 076CC5DC : Critical section address. 01D0191C : Critical section initialization stack trace. 075D0000 : Memory block address. 00140000 : Memory block size. ======================================= This verifier stop is continuable. After debugging it use `go' to continue. ======================================= Given that my code does not leak TCriticalSection, how do I prevent Delphi from doing so.

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  • C# Textbox validation should only accept integer values, but allows letters as well

    - by sonny5
    if (textBox1.Text != "") // this forces user to enter something { // next line is supposed to allow only 0-9 to be entered but should block all... // ...characters and should block a backspace and a decimal point from being entered.... // ...but it is also allowing characters to be typed in textBox1 if(!IsNumberInRange(KeyCode,48,57) && KeyCode!=8 && KeyCode!=46) // 46 is a "." { e.Handled=true; } else { e.Handled=false; } if (KeyCode == 13) // enter key { TBI1 = System.Convert.ToInt32(var1); // converts to an int Console.WriteLine("TBI1 (var1 INT)= {0}", var1); Console.WriteLine("TBI1= {0}", TBI1); } if (KeyCode == 46) { MessageBox.Show("Only digits...no dots please!"); e.Handled = !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar); } } else { Console.WriteLine("Cannot be empty!"); } // If I remove the outer if statement and skip checking for an empty string, then // it prevents letters from being entered in the textbox. I need to do both, prevent an // empty textbox AND prevent letters from being entered. // thanks, Sonny5

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  • What purpose does “using” serve when used the following way

    - by user287745
    What purpose does “using” serve when used the following way:- ONE EXAMPLE IS THIS, (AN ANSWERER- @richj - USED THIS CODE TO SOLVE A PROBLEM THANKS) private Method(SqlConnection connection) { using (SqlTransaction transaction = connection.BeginTransaction()) { try { // Use the connection here .... transaction.Commit(); } catch { transaction.Rollback(); throw; } } } OTHER EXAMPLE I FOUND WHILE READING ON MICROSOFT SUPPORT SITE public static void ShowSqlException(string connectionString) { string queryString = "EXECUTE NonExistantStoredProcedure"; StringBuilder errorMessages = new StringBuilder(); using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = new SqlCommand(queryString, connection); try { command.Connection.Open(); command.ExecuteNonQuery(); } catch (SqlException ex) { for (int i = 0; i < ex.Errors.Count; i++) { errorMessages.Append("Index #" + i + "\n" + "Message: " + ex.Errors[i].Message + "\n" + "LineNumber: " + ex.Errors[i].LineNumber + "\n" + "Source: " + ex.Errors[i].Source + "\n" + "Procedure: " + ex.Errors[i].Procedure + "\n"); } Console.WriteLine(errorMessages.ToString()); } } } I AM doing at top of page as using system.data.sqlclient etc so why this using thing in middle of code, What if I omit it (I know the code will work) but what functionality will I be losing

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