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• Looking for evolutionary music example code

  - by Dan Dyer

  I would like to implement an interactive evolutionary algorithm for generating music (probably just simple melodies to start with). I'd like to use JFugue for this. Its website claims that it is well-suited to evolutionary music, but I can't find any evolutionary examples. I already have a framework to provide the evolutonary machinery. What I am looking for is some simple, working code that demonstrates viable approaches for the musical part (e.g. suitable encodings and evolutionary operators for the evolved tunes). I have some ideas how it might be achieved, but I'm not particularly knowledgeable about music theory, so to start with I'd like to just reimplement something that is known to work. So does anybody have, or know of, any freely available code (any language is fine) that demonstrates one or more approaches to evolutionary music? EDIT: I'm specifically looking for evolutionary code rather than other techniques that could be used for music synthesis.

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• How does the timeout work in Restlet's client class?

  - by Greg Noe

  Here's some code: Client client = new Client(Protocol.HTTP); client.setConnectTimeout(1); //milliseconds Response response = client.post(url, paramRepresentation); System.out.println("timed out"); What I would expect to happen is that it prints "timed out" before the resource has time to process. Instead, nothing happens with the timeout and it doesn't print "timed out" until after the resource returns. Even if I put a Thread.sleep(5000) at the resource that's handling the request, the entire sleep is performed, like the timeout did nothing. Anyone have experience with this? I'm using Restlet 1.1.1. Thanks.

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• Web Apps: Closeable Announcements/Info/Tooltip boxes (how to implement)

  - by Daxon

  I want to understand how to implement an announcement/info box system that displays a box for the user with information. The user can do nothing or close the box, but then it will never be seen again. E.g. Facebook home page. Box asking for Translators. if you leave it then its always there. But if you close it, it never appears again. Does this mean that a Boolean value needs to be used and checked for announcement/info boxes? I'm looking for a pseudo way with database tables to do this?

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• How to consume RESTful web service in my JSF project?

  - by Nitesh Panchal

  Hello, As RESTful web services is url based and is not a object, we can't call methods on it. I have a simple web service with only one method in it with is @GET. I saw one screencast and it used some javascript library to consume the web service. But, how do i use it with my JSF project? I can't even inject it like a normal web service. Please help. I am new to REST. Can i not consume it in my managed bean? If the only way to consume the webservice is through javascript, can anybody here give me details of how to consume it through JQuery? Thanks in advance :)

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• Cactus versus mock objects (jMock, Easy mock)

  - by Thomman

  I'm little confused with Cactus and mock objects (jMock, Easy mock). Could anyone please answer the following questions? When to use Cactus for testing? When not to use Cactus for testing? When to use mock objects for testing? When not to use mock objects for testing?

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• Upload image from J2ME client to a Servlet

  - by Akash

  I want to send an image from a J2ME client to a Servlet. I am able to get a byte array of the image and send it using HTTP POST. conn = (HttpConnection) Connector.open(url, Connector.READ_WRITE, true); conn.setRequestMethod(HttpConnection.POST); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); os.write(bytes, 0, bytes.length); // bytes = byte array of image This is the Servlet code: String line; BufferedReader r1 = new BufferedReader(new InputStreamReader(in)); while ((line = r1.readLine()) != null) { System.out.println("line=" + line); buf.append(line); } String s = buf.toString(); byte[] img_byte = s.getBytes(); But the problem I found is, when I send bytes from the J2ME client, some bytes are lost. Their values are 0A and 0D hex. Exactly, the Carriage Return and Line Feed. Thus, either POST method or readLine() are not able to accept 0A and 0D values. Any one have any idea how to do this, or how to use any another method?

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• LF/CR issue with RS232 in Linux

  - by Albinoswordfish

  I've been having this problem where anytime I send a 0xA through an RS-232 in a Linux OS the receiver interprets that as 2 bytes, 0xD and 0xA. Also whenever I receive 0xD the serial port interprets that as 0xA. I've been reading that there are known issues regarding this, has anybody been able to find a solution?

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• Suggestions for GUI of a multiledia messaging application in J2ME

  - by awaghad-ashish

  Hello everyone, We have developed a messaging application in j2me which adds text message, gets pictures from gallery and attaches them to the message etc and sends it over to a server after encryption, i.e. the client wants the messages to be encrypted. The app is ready but the only problem is that the GUI of the app looks miserable compared to the GUI of native messaging application on Nokia phones. Our GUI consists of a texfield for adding recipients i.e. the user clicks "options" to "add recipients" and is taken to a new form where contacts are shown. but the textfield is not in one line (like in case of native app). Also, we need the user to input the text message in a textField since we cannot have textbox inside a form (but the native app has a textbox as well as a textField ). Are there any ways to achieve such GUIs (one-line textfields, textbox like thing inside a form)? I hope you all understand what I mean, any kind of help will be appreciated. Thanks and regards, Ashish.

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• convert ArrayList.toString() back to ArrayList in one call

  - by dotnetnewbie

  I have a toString() representation of an ArrayList. Copying the toString() value to clipboard, I want to copy it back into my IDE editor, and create the ArrayList instance in one line. In fact, what I'm really doing is this: my ArrayList.toString() has data I need to setup a unit test. I want to copy this ArrayList.toString() into my editor to build a test against this edge case I don't want to parse anything by hand My input looks like this: [15.82, 15.870000000000001, 15.92, 16.32, 16.32, 16.32, 16.32, 17.05, 17.05, 17.05, 17.05, 18.29, 18.29, 19.16] The following do not work: Arrays.asList() google collections Lists.newArrayList() Suggestions?

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• Flex/Flash 4 datagrid displays raw xml

  - by Setori

  Problem: Flex/Flash4 client (built with FlashBuilder4) displays the xml sent from the server exactly as is - the datagrid keeps the format of the xml. I need the datagrid to parse the input and place the data in the correct rows and columns of the datagrid. flow: click on a date in the tree and it makes a server request for batch information in xml form. Using a CallResponder I then update the datagrid's dataProvider. [code] <fx:Script> <![CDATA[ import mx.controls.Alert; [Bindable]public var selectedTreeNode:XML; public function taskTreeChanged(event:Event):void { selectedTreeNode=Tree(event.target).selectedItem as XML; var searchHubId:String = selectedTreeNode.@hub; var searchDate:String = selectedTreeNode.@lbl; if((searchHubId == "") || (searchDate == "")){ return; } findShipmentBatches(searchDate,searchHubId); } protected function findShipmentBatches(searchDate:String, searchHubId:String):void{ findShipmentBatchesResult.token = actWs.findShipmentBatches(searchDate, searchHubId); } protected function updateBatchDataGridDP():void{ task_list_dg.dataProvider = findShipmentBatchesResult.lastResult; } ]]> </fx:Script> <fx:Declarations> <actws:ActWs id="actWs" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)" showBusyCursor="true"/> <s:CallResponder id="findShipmentBatchesResult" result="updateBatchDataGridDP()"/> </fx:Declarations> <mx:AdvancedDataGrid id="task_list_dg" width="100%" height="95%" paddingLeft="0" paddingTop="0" paddingBottom="0"> <mx:columns> <mx:AdvancedDataGridColumn headerText="Receiving date" dataField="rd"/> <mx:AdvancedDataGridColumn headerText="Msg type" dataField="mt"/> <mx:AdvancedDataGridColumn headerText="SSD" dataField="ssd"/> <mx:AdvancedDataGridColumn headerText="Shipping site" dataField="sss"/> <mx:AdvancedDataGridColumn headerText="File name" dataField="fn"/> <mx:AdvancedDataGridColumn headerText="Batch number" dataField="bn"/> </mx:columns> </mx:AdvancedDataGrid> //xml example from server <batches> <batch> <rd>2010-04-23 16:31:00.0</rd> <mt>SC1REVISION01</mt> <ssd>2010-02-18 00:00:00.0</ssd> <sss>100000009</sss> <fn>Revision 1-DF-Ocean-SC1SUM-Quanta-PACT-EMEA-Scheduled Ship Date 20100218.csv</fn> <bn>10041</bn> </batch> <batches> [/code] and the xml is pretty much displayed exactly as is shown in the example above in the datagrid columns... I would appreciate your assistance.

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• How to update maven repository in eclipse?

  - by Stephane Grenier

  Assuming you're already using the m2eclipse plugin, what can you do it doesn't update the dependencies to the latest in your repo. For example, on the command line you can just add the -U flag as in: mvn clean install -U to force the dependencies to be updated. Is there something like this within eclipse since it doesn't always seem to pick up the latest updates.

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• Is this valid EJB-QL?

  - by Yishai

  I have the following construct in EJB-QL several EJB 2.1 finder methods: SELECT distinct OBJECT(rd) FROM RequestDetail rd, DetailResponse dr WHERE dr.updateReqResponseParentID is not null and dr.updateReqResponseParentID = ?1 and rd.requestDetailID = dr.requestDetailID and rd.deleted is null and dr.deleted is null IDEA's EJB-QL inspection flags the use of the two object FROM RequestDetail rd, DetailResponse dr with an inspection which says: Several ranged variable declarations are not supported, use collection member declarations instead (e.g. IN(o.lineItems)) The queries themselves function fine (as in return the expected results) on JBoss 4.2. Is IDEA all wet here, or is there a valid issue with the query? And what is the actual preferred alternative syntax for such a query?

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• How to configure Spring JavaMailSenderImpl for Gmail

  - by Andrew Carlson

  I am trying to find the correct properties to use to connect to the Gmail SMTP sever using the JavaMailSenderImpl class. Let me first say that I have tried the approach found here. This worked fine. But when I tried the configuration below that post with the exact same authentication information I received a javax.mail.AuthenticationFailedException. My currently configuration looks like this. <bean id="mailSender" class ="org.springframework.mail.javamail.JavaMailSenderImpl" > <property name="username" value="[email protected]" /> <property name="password" value="XXX" /> <property name="javaMailProperties"> <props> <prop key="mail.smtp.host">smtp.gmail.com</prop> <prop key="mail.smtp.port">587</prop> <prop key="mail.smtp.auth">true</prop> <prop key="mail.smtp.starttls.enable">true</prop> </props> </property> </bean> Why am I still getting this javax.mail.AuthenticationFailedException if I know that my credentials are correct. Update Here is my updated code based on the answers below. I am still receiving the same exception. <bean id="mailSender" class ="org.springframework.mail.javamail.JavaMailSenderImpl" > <property name="username" value="[email protected]" /> <property name="password" value="XXX" /> <property name="javaMailProperties"> <props> <prop key="mail.smtp.from">[email protected]</prop> <prop key="mail.smtp.user">[email protected]</prop> <prop key="mail.smtp.password">XXX</prop> <prop key="mail.smtp.host">smtp.gmail.com</prop> <prop key="mail.smtp.port">587</prop> <prop key="mail.smtp.auth">true</prop> <prop key="mail.smtp.starttls.enable">true</prop> </props> </property> </bean>

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• Exporting non-public type through public API

  - by feelgood

  What if I have few factory methods returning non-public type and pairing set of methods which gives variables of this non-public type? This results with titled warning message in NetBeans. In result public API will contain only two pairing sets of methods. The reason is to make my type hierarchy sealed (like seald classes in Scala) and allow users only instantiate these types through factory methods. So we get DSL in some sense. For example, Schedule class represented by calendar fields' contraints. There are some types of contraints - Range, Singleton, List, FullSet - with NumberSet interface as a root. We don't want to expose these types and how Schedule interact with them. We just want the specification from the user. So we make NumberSet package-private. In class Schedule we create few factory-methods for constraints: NumberSet singleton(int value); NumberSet range(int form, int to); NumberSet list(NumberSet ... components); and some methods for creating Schedule object: Schedule everyHour(NumberSet minutes); Schedule everyDay(NumberSet minutes, NumberSet hours); User can only use them in the manner: Schedule s = Schedule.everyDay( singleton(0), list(range(10-15), singleton(8)) ); Is it bad idea?

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• SSL Certificate without host name in it

  - by Sinuhe

  I have implemented a web service with server and client authentication using keytool. The problem is that this authentication doesn't work if I don't include the name of the host in it. For example: keytool -genkey -alias myAlias -keyalg RSA -keypass myPassword -storepass myPassword -keystore my.keystore -dname "CN=myhost" But I don't need and I don't like validation by host or by IP. Is there any way of avoiding it? Thanks.

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• String replacement problem.

  - by fastcodejava

  I want to provide some template for a code generator I am developing. A typical pattern for class is : public ${class_type} ${class_name} extends ${super_class} implements ${interfaces} { ${class_body} } Problem is if super_class is blank or interfaces. I replace extends ${super_class} with empty string. But I get extra spaces. So a class with no super_class and interfaces end up like : public class Foo { //see the extra spaces before {? ${class_body} } I know I can replace multiple spaces with single, but is there any better approach?

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• how to display the decrypted and splited Strings in order?

  - by sebby_zml

  Hi everyone, i need some help and guidance in displaying the splitted Strings in order. let say, i have username, password, nonceInString. i had successfully encrypted and decrypted those. then i split the decrypted data. it was done, too. i want to display the decrypted data in order. something like this. userneme: sebastian password: harrypotter nonce value: sdgvay1saq3qsd5vc6dger9wqktue2tz* i tried the following code, but it didn't display like i wish to. pls help. thanks a lot in advance. String codeWord = username + ";" + password + ";" + nonceInString; String encryptedData = aesEncryptDecrypt.encrypt(codeWord); String decryptedData = aesEncryptDecrypt.decrypt(encryptedData); String[] splits = decryptedData.split(";"); String[] variables = {"username", "password", "nonce value"}; for (String data : variables){ for (String item : splits){ System.out.println( data + ": "+ item); } }

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• Blackberry: How to properly handle focus traversal in custom field?

  - by DaveJohnston

  I am writing an app for Blackberry and I have the following problem: I have implemented a custom field by extending the Manager class. The field is quite simple, it consists of a label and two check boxes, yes and no. The fields are laid out so that the label is on the left and uses as much space as it can while still allowing room for the check boxes which are positioned next to each other at the right and vertically centred compared to the label (if it spans more than one line). So it looks like this: This is a question? O Yes O No Everything is fine so far in terms of laying out the fields. But now I am trying to handle focus traversal. First of all the default behaviour when the user scrolls up or down is to move between the yes and no options. I want to move to the next field above or below when up or down is pressed, so I did this: protected int moveFocus(int amount, int status, int time) { if (status == 537001984 || status == -1610481664) { // Up or down was pressed // Don't move focus between yes and no when up or down is pressed. return amount; } return super.moveFocus(amount, status, time); } And that seems to work. The next thing I would like to do is to remember which option last had the focus when the field loses focus, then on gaining focus again (regardless of which direction the focus comes from) set this field to have the focus. I tried overriding onUnfocus and onFocus so that onUnfocus I note which field was focussed then onFocus setFocus to that field. But I get a StackOverflowError, I guess because the call to setFocus on a field within the manager actually calls onFocus for the manager itself again?? So does anyone know how I should be doing this? I checked the DateField and it has the exact behaviour I am looking for, i.e. it remembers if you were last on the day, month or year field and sets this field to focus when the field itself gets the focus.

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• Hibernate annotated many-to-one not adding child to parent Collection

  - by Rob Hruska

  I have the following annotated Hibernate entity classes: @Entity public class Cat { @Column(name = "ID") @GeneratedValue(strategy = GenerationType.AUTO) @Id private Long id; @OneToMany(mappedBy = "cat", cascade = CascadeType.ALL, fetch = FetchType.EAGER) private Set<Kitten> kittens = new HashSet<Kitten>(); public void setId(Long id) { this.id = id; } public Long getId() { return id; } public void setKittens(Set<Kitten> kittens) { this.kittens = kittens; } public Set<Kitten> getKittens() { return kittens; } } @Entity public class Kitten { @Column(name = "ID") @GeneratedValue(strategy = GenerationType.AUTO) @Id private Long id; @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER) private Cat cat; public void setId(Long id) { this.id = id; } public Long getId() { return id; } public void setCat(Cat cat) { this.cat = cat; } public Cat getCat() { return cat; } } My intention here is a bidirectional one-to-many/many-to-one relationship between Cat and Kitten, with Kitten being the "owning side". What I want to happen is when I create a new Cat, followed by a new Kitten referencing the Cat, the Set of kittens on my Cat should contain the new Kitten. However, this does not happen in the following test: @Test public void testAssociations() { Session session = HibernateUtil.getSessionFactory().getCurrentSession(); Transaction tx = session.beginTransaction(); Cat cat = new Cat(); session.save(cat); Kitten kitten = new Kitten(); kitten.setCat(cat); session.save(kitten); tx.commit(); assertNotNull(kitten.getCat()); assertEquals(cat.getId(), kitten.getCat().getId()); assertTrue(cat.getKittens().size() == 1); // <-- ASSERTION FAILS assertEquals(kitten, new ArrayList<Kitten>(cat.getKittens()).get(0)); } Even after re-querying the Cat, the Set is still empty: // added before tx.commit() and assertions cat = (Cat)session.get(Cat.class, cat.getId()); Am I expecting too much from Hibernate here? Or is the burden on me to manage the Collection myself? The (Annotations) documentation doesn't make any indication that I need to create convenience addTo*/removeFrom* methods on my parent object. Can someone please enlighten me on what my expectations should be from Hibernate with this relationship? Or if nothing else, point me to the correct Hibernate documentation that tells me what I should be expecting to happen here. What do I need to do to make the parent Collection automatically contain the child Entity?

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• Building the WAR with m2eclipse in combination with WTP (handling webResources)

  - by waxwing

  I have a situation where I have a web application that is built using maven (i.e., maven-war-plugin). For each code modification, we have had to manually launch maven and restart the application server. Now, to reduce build cycle overhead, I want to use WTP to publish the webapp. Now, we have resource processing with Maven, and there are some additional Maven tasks defined in our POM when building the webapp. Therefore m2eclipse seems like a natural solution. I have gotten far enough that the Maven builder is running these tasks and filtering resources correctly. However, when I choose "Run on Server", the WAR file does not look like it would if I built it in Maven. I am guessing that this is because WTP actually builds the WAR, and not the m2eclipse builder. So even though we have configured the maven-war-plugin in our POM, those settings are not used. Below is a snippet with our maven-war-plugin configuration. What is configured under "webResources" is not picked up, it appears: <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.1-alpha-2</version> <configuration> <outputDirectory>${project.build.directory}</outputDirectory> <workDirectory>${project.build.directory}/work</workDirectory> <webappDirectory>${project.build.webappDirectory}</webappDirectory> <cacheFile>${project.build.webappDirectory}/webapp-cache.xml</cacheFile> <filteringDeploymentDescriptors>true</filteringDeploymentDescriptors> <nonFilteredFileExtensions> <nonFilteredFileExtension>pdf</nonFilteredFileExtension> <nonFilteredFileExtension>png</nonFilteredFileExtension> <nonFilteredFileExtension>gif</nonFilteredFileExtension> <nonFilteredFileExtension>jsp</nonFilteredFileExtension> </nonFilteredFileExtensions> <webResources> <!-- Add generated WSDL:s and XSD:s for the web service api. --> <resource> <directory>${project.build.directory}/jaxws/wsgen/wsdl</directory> <targetPath>WEB-INF/wsdl</targetPath> <filtering>false</filtering> <includes> <include>**/*</include> </includes> </resource> </webResources> </configuration> Do I need to reconfigure these resources to be handled elsewhere, or is there a better solution?

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• Is it possible to search jdom for attributes?

  - by Christian

  Is it possible in jdom to get the children of a node that share a certain attribute without having to look at all children in bruteforce? Is search in logarithmic time possible?

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• jbuilder download url

  - by binu

  sir, i want to download jbuilder.if u know the url kindly give the url

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• How to mock a file with EasyMock?

  - by Todd

  Hello, I have recently been introduced to EasyMock and have been asked to develop some unit tests for a FileMonitor class using it. The FileMonitor class is based on a timed event that wakes up and checks for file modification(s) in a defined list of files and directories. I get how to do this using the actual file system, write a test that writes to a file and let the FileMonitor do its thing. So, how do I do this using EasyMock? I just don't get how to have EasyMock mock the file system. Thanks, Todd

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• Removing duplicates without overriding hash method

  - by Javi

  Hello, I have a List which contains a list of objects and I want to remove from this list all the elements which have the same values in two of their attributes. I had though about doing something like this: List<Class1> myList; .... Set<Class1> mySet = new HashSet<Class1>(); mySet.addAll(myList); and overriding hash method in Class1 so it returns a number which depends only in the attributes I want to consider. The problem is that I need to do a different filtering in another part of the application so I can't override hash method in this way (I would need two different hash methods). What's the most efficient way of doing this filtering without overriding hash method? Thanks

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• Nullable Date column merge problem

  - by Vladimir

  I am using JPA with openjpa implementation beneath, on a Geronimo application server. I am also using MySQL database. I have a problem with updating object with nullable Date property. When I'm trying to merge entity with Date property set to null, no sql update script is generated (or when other fields are modified, sql update script is generated, but date field is ommited from it). If date field is set to some other not null value, update script is properly generated. Did anyone have problem like that?

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