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• starting and stopping hsqldb from unit tests

  - by Casey

  I'm trying to create integration tests using hsqldb in an in memory mode. At the moment, I have to start the hsqldb server from the command line before running the unit tests. I would like to be able to be able to control the hsqldb server from my integration tests. I can't seem to get this to all work out though from code. Thanks, Casey Update: This appears to work along with having a hibernate.cfg.xml file in the classpath: org.hsqldb.Server.main(new String[]{}); and in my hibernate.cfg.xml file: <property name="connection.driver_class">org.hsqldb.jdbcDriver</property> <property name="connection.url">jdbc:hsqldb:mem:ww</property> <property name="connection.username">sa</property> <property name="connection.password"></property> <property name="connection.pool_size">1</property> <property name="dialect">org.hibernate.dialect.HSQLDialect</property> <property name="current_session_context_class">thread</property> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <property name="hbm2ddl.auto">update</property>

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• Spring Web Service Client Tutorial or Example Required

  - by Nirmal

  Hello All... I need to jump into the Spring Web Service Project, in that I required to implement the Spring Web Service's Client Only.. So, I have already gone through with Spring's Client Reference Document. So, I got the idea of required classes for the implementation of Client. But my problem is like I have done some googling, but didn't get any proper example of both Client and Server from that I can implement one sample for my client. So, if anybody gives me some link or tutorial for proper example from that I can learn my client side implementation would be greatly appreciated. Thanks in advance...

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• What can I access in Androids Native libraries? And How?

  - by Donal Rafferty

  I am completely new to the NDK. I have done a couple of the tutorials including the hello from jni one and another one that calculates the sum of two numbers. They involved using cygwin and the ndk to create the library so file and I have a bit of a grasp on how to insert my own libraries into the libraries layer of Android. I have now been asked to access the native libraries on Android and see what I can use them for. My question is can I do this? The STABLE-APIS.txt document is a bit vague and mentions the following as Stable C++ API's in Android 1.5 cstddef new utility stl_pair.h Does that mean I can access them? If so then how do I go about it? I dont think that following the tutorials I have already done would be any help? Any pointers on how to do this or links to tutorials etc.. would be greatly appreciated

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• display sqlite datatable in a jtable

  - by tuxou

  Hi I'm trying to display an sqlite data table in a jtable but i have an error " sqlite is type forward only" how could I display it in a jtable try { long start = System.currentTimeMillis(); Statement state = ConnectionBd.getInstance().createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY ); ResultSet res = state.executeQuery("SELECT * FROM data"); ResultSetMetaData meta = res.getMetaData(); Object[] column = new Object[meta.getColumnCount()]; for(int i = 1 ; i <= meta.getColumnCount(); i++){ column[i-1] = meta.getColumnName(i); } res.last(); int rowCount = res.getRow(); Object[][] data = new Object[res.getRow()][meta.getColumnCount()]; res.beforeFirst(); int j = 1; while(res.next()){ for(int i = 1 ; i <= meta.getColumnCount(); i++) data[j-1][i-1] = res.getObject(i); j++; } res.close(); state.close(); long totalTime = System.currentTimeMillis() - start; result.removeAll(); result.add(new JScrollPane(new JTable(data, column)), BorderLayout.CENTER); result.add(new JLabel("execute in " + totalTime + " ms and has " + rowCount + " ligne(s)"), BorderLayout.SOUTH); result.revalidate(); } catch (SQLException e) { result.removeAll(); result.add(new JScrollPane(new JTable()), BorderLayout.CENTER); result.revalidate(); JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR ! ", JOptionPane.ERROR_MESSAGE); } thank you

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• How to convert CMYK to RGB programmatically in indesign.

  - by BBDeveloper

  Hi, I have a CMYK colorspace in indesign, i want to convert that as RGB color space, I got some codes, but I am getting incorrect data. Some of the codes which I tried are given below double cyan = 35.0; double magenta = 29.0; double yellow = 0.0; double black = 16.0; cyan = Math.min(255, cyan + black); //black is from K magenta = Math.min(255, magenta + black); yellow = Math.min(255, yellow + black); l_res[0] = 255 - cyan; l_res[1] = 255 - magenta; l_res[2] = 255 - yellow; @Override public float[] toRGB(float[] p_colorvalue) { float[] l_res = {0,0,0}; if (p_colorvalue.length >= 4) { float l_black = (float)1.0 - p_colorvalue[3]; l_res[0] = l_black * ((float)1.0 - p_colorvalue[0]); l_res[1] = l_black * ((float)1.0 - p_colorvalue[1]); l_res[2] = l_black * ((float)1.0 - p_colorvalue[2]); } return (l_res); } The values are C=35, M = 29, Y = 0, K = 16 in CMYK color space and the correct RGB values are R = 142, G = 148, B = 186. In adobe indesign, using swatches we can change the mode to CMYK or to RGB. But I want to do that programmatically, Can I get any algorithm to convert CMYK to RGB which will give the correct RGB values. And one more question, if the alpha value for RGB is 1 then what will be the alpha value for CMYK? Can anyone help me to solve these issues... Thanks in advance.

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• using wsgen utility

  - by Noona

  I have a web service implemented in this folder in package in eclipse: src\hw2\agency\server to generate the client classes using WSGEN utility, I entered the following command in cmd: C:\Users\NOONA\workspace\HW2>wsgen -d . -keep -wsdl -classpath . hw2.agency.server.AgencyServiceServerImpl but I get the following error: Class not found: "hw2.agency.server.AgencyServiceServerImpl" so I was wondering, what should I do to make it find the class? thanks

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• common problem with Hibernate/NHibernate and child IDs

  - by tyndall

  I'm asking both Hibernate and NHibernate groups because I'm thinking this may be a common issue seen on both. What does it usually mean when you call a saveOrUpdate on a child object and... 1) If it is an insert everything works fine. 2) If it is an update its wiping out the parent ID in the database.

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• How can I turn a string of text into a BigInteger representation for use in an El Gamal cryptosystem

  - by angstrom91

  I'm playing with the El Gamal cryptosystem, and my goal is to be able to encipher and decipher long sequences of text. I have come up with a method that works for short sequences, but does not work for long sequences, and I cannot figure out why. El Gamal requires the plaintext to be an integer. I have turned my string into a byte[] using the .getBytes() method for Strings, and then created a BigInteger out of the byte[]. After encryption/decryption, I turn the BigInteger into a byte[] using the .toByteArray() method for BigIntegers, and then create a new String object from the byte[]. This works perfectly when i call ElGamalEncipher with strings up to 129 characters. With 130 or more characters, the output produced is garbled. Can someone suggest how to solve this issue? Is this an issue with my method of turning the string into a BigInteger? If so, is there a better way to turn my string of text into a BigInteger and back? Below is my encipher/decipher code. public static BigInteger[] ElGamalEncipher(String plaintext, BigInteger p, BigInteger g, BigInteger r) { // returns a BigInteger[] cipherText // cipherText[0] is c // cipherText[1] is d BigInteger[] cipherText = new BigInteger[2]; BigInteger pText = new BigInteger(plaintext.getBytes()); // 1: select a random integer k such that 1 <= k <= p-2 BigInteger k = new BigInteger(p.bitLength() - 2, sr); // 2: Compute c = g^k(mod p) BigInteger c = g.modPow(k, p); // 3: Compute d= P*r^k = P(g^a)^k(mod p) BigInteger d = pText.multiply(r.modPow(k, p)).mod(p); // C =(c,d) is the ciphertext cipherText[0] = c; cipherText[1] = d; return cipherText; } public static String ElGamalDecipher(BigInteger c, BigInteger d, BigInteger a, BigInteger p) { //returns the plaintext enciphered as (c,d) // 1: use the private key a to compute the least non-negative residue // of an inverse of (c^a)' (mod p) BigInteger z = c.modPow(a, p).modInverse(p); BigInteger P = z.multiply(d).mod(p); byte[] plainTextArray = P.toByteArray(); String output = null; try { output = new String(plainTextArray, "UTF8"); } catch (Exception e) { } return output; }

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• Maven Plugins - how to require a license

  - by Walter White

  I would like to make my plugin require a license to run similar to the maven clover plugin. Is there some utility out there that I can generate licenses with that will also allow me to integrate that into the plugin? I need to do the following steps. Modify the existing plugin to validate the license file Generate the license file online and store the information for retrieval later. Thanks, Walter

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• Play framework 1.x on Tomcat - httpOnly cookies

  - by aishwarya

  I'm setting application.session.httpOnly=true in the application.conf and generating a war file and deploying on tomcat. I still see the cookie generated as HttpOnly=No and it is editable. This is an issue with play 1.x running on tomcat 6 (i.e. servlet api 2.x). Apparently, http only flag for cookies was only introduced in servlet 3.0 and so is only available in tomcat 7+ has anybody identified a workaround for this so far (so I could have http only cookies for play 1.x on tomcat 6.x ) ? the httpOnly flag on context in tomcat only works for tomcat's jsessionid cookie... also, can I run a play 1.x app on servlet 3.0 ? PS: This was also posted on the play framework's google groups but we did not receive a response and so posting on SO.

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• inner class within Interface

  - by harigm

  is that possible to create a inner class within an interface? If yes, why do we create like that? Anyways we are not going to create any interface objects? Do they help in any Development process?

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• Duplicate column name by JPA with @ElementCollection and @Inheritance

  - by gerry

  I've created the following scenario: @javax.persistence.Entity @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) public class MyEntity implements Serializable{ @Id @GeneratedValue protected Long id; ... @ElementCollection @CollectionTable(name="ENTITY_PARAMS") @MapKeyColumn (name = "ENTITY_KEY") @Column(name = "ENTITY_VALUE") protected Map<String, String> parameters; ... } As well as: @javax.persistence.Entity public class Sensor extends MyEntity{ @Id @GeneratedValue protected Long id; ... // so here "protected Map<String, String> parameters;" is inherited !!!! ... } So running this example, no tables are created and i get the following message: WARNUNG: Got SQLException executing statement "CREATE TABLE ENTITY_PARAMS (Entity_ID BIGINT NOT NULL, ENTITY_VALUE VARCHAR(255), ENTITY_KEY VARCHAR(255), Sensor_ID BIGINT NOT NULL, ENTITY_VALUE VARCHAR(255))": com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Duplicate column name 'ENTITY_VALUE' I also tried overriding the attributes on the Sensor class... @AttributeOverrides({ @AttributeOverride(name = "ENTITY_KEY", column = @Column(name = "SENSOR_KEY")), @AttributeOverride(name = "ENTITY_VALUE", column = @Column(name = "SENSOR_VALUE")) }) ... but the same error. Can anybody help me?

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• how to aviod infinite loop in observer pattern?

  - by joseph

  Hello. I have only one class with many instances. Every instance is observer of couple of other instances. As well every instance can be observable by couple of another instances. How to avoid infinite loop of calling update() in observers?

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• Unexpected JAXB error

  - by Mark Lewis

  Hello, From the documentation it's clear I need to use the following to get a simple unmarshalling to occur from my XML file/schema: JAXBContext jc = JAXBContext.newInstance("PackageName"); where PackageName is my package name. I've looked on google for a bit to no avail, to find out why I'm then getting this runtime error: Line:Col[2:142]:cvc-elt.1: Cannot find the declaration of element 'myconfig'. Line:Col[2:142]:unexpected element (uri:"http://www.w3.org", local:"myconfig"). Expected elements are <{}myconfig> Caught UnmarshalException This occurs at the top of all my class files, including the ones the XJC plugin for eclipse created for me (which I then moved out of PackageName.PackageName which it automatically created): package PackageName; so why is this error occurring?

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• Persistence with Vaadin

  - by palto

  Hi I'm trying to learn vaadin. I'm really confused how to do any kind of application development with persistence because if I have a reference to my service layer objects, they get stored in session and I really don't want that. Persistence stuff just isn't serializable. My case is that I have an already made application that uses Spring and I'm creating a new UI for it with Vaadin. I can inject the spring stuff to my Vaadin application but that gets stored in the session. Any tips? By the way how do you post in the Vaadin forums? I can't find a post button or way to register :)

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• JPA Cascading Delete: Setting child FK to NULL on a NOT NULL column

  - by JBristow

  I have two tables: t_promo_program and t_promo_program_param. They are represented by the following JPA entities: @Entity @Table(name = "t_promo_program") public class PromoProgram { @Id @Column(name = "promo_program_id") private Long id; @OneToMany(cascade = {CascadeType.REMOVE}) @JoinColumn(name = "promo_program_id") private List<PromoProgramParam> params; } @Entity @Table(name = "t_promo_program_param") public class PromoProgramParam { @Id @Column(name = "promo_program_param_id") private Long id; //@NotNull // This is a Hibernate annotation so that my test db gets created with the NOT NULL attribute, I'm not married to this annotation. @ManyToOne @JoinColumn(name = "PROMO_PROGRAM_ID", referencedColumnName = "promo_program_id") private PromoProgram promoProgram; } When I delete a PromoProgram, Hibernate hits my database with: update T_PROMO_PROGRAM_PARAM set promo_program_id=null where promo_program_id=? delete from t_promo_program where promo_program_id=? and last_change=? I'm at a loss for where to start looking for the source of the problem.

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• Accessing super class function using subclass object

  - by bdhar

  I have an object for a subclass who is of it's superclass type. There is a overridden function in subclass which gets executed when called using the object. How to call the parent's function using the same object? Is there any way to achieve this? package supercall; public class Main { public static void main(String[] args) { SomeClass obj = new SubClass(); obj.go(); } } class SomeClass { SomeClass() { } public void go() { System.out.println("Someclass go"); } } class SubClass extends SomeClass { SubClass() { } @Override public void go() { System.out.println("Subclass go"); } } Consider the code above. Here it prints Subclass go . Instead I have to print Superclass go .

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• Wicket: Relative to absolute URL or get base URL

  - by Gilean

  If I have a relative path to a static asset (flash/blah.swf), what is the best way to convert this to an absolute URL (http://localhost/app/flash/blah.swf)? Or what is the best way to get the base URL of the Wicket application? I've tried using RequestUtils.toAbsolutePath but it doesn't seem to work reliably and is frequently throwing exceptions.

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• How to Use Grizzly Embedded Server for Mule as Well as Jersey

  - by Tim

  I'm currently using JerseyTest w/ Grizzly embedded server to test some code. I do some very simple configuration to point it to the proper resources: Map<String, String> initParams = new HashMap<String, String>(); initParams.put("com.sun.jersey.config.property.packages", "com.sample.service"); ApplicationDescriptor appDescriptor = new ApplicationDescriptor(); appDescriptor.setServletInitParams(initParams); super.setupTestEnvironment(appDescriptor); This works fine and the Jersey components are available and working as expected. I'm now trying to add some Mule functionality to some of these Jersey calls, but Mule is not being properly initialized/configured by Grizzly. Has anyone gotten this kind of setup running? What additional configuration do I need to do with JerseyTest/GrizzlyWebServer to get it to initialize Mule properly?

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• Quartz.properties

  - by pandi-sus

  I developed an EAR using Quartz API. I have put my quartz.properties file in the classpath(WEB-INF/classes in war). Added following lines to web.xml file <context-param> <param-name>config-file</param-name> <param-value>/WEB-INF/classes/quartz.properties</param-value> </context-param> But Quartz still loads the default properties file from the quartz.jar

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• Using Hibernate to do a query involving two tables

  - by Nathan Spears

  I'm inexperienced with sql in general, so using Hibernate is like looking for an answer before I know exactly what the question is. Please feel free to correct any misunderstandings I have. I am on a project where I have to use Hibernate. Most of what I am doing is pretty basic and I could copy and modify. Now I would like to do something different and I'm not sure how configuration and syntax need to come together. Let's say I have two tables. Table A has two (relevant) columns, user GUID and manager GUID. Obviously managers can have more than one user under them, so queries on manager can return more than one row. Additionally, a manager can be managing the same user on multiple projects, so the same user can be returned multiple times for the same manager query. Table B has two columns, user GUID and user full name. One-to-one mapping there. I want to do a query on manager GUID from Table A, group them by unique User GUID (so the same User isn't in the results twice), then return those users' full names from Table B. I could do this in sql without too much trouble but I want to use Hibernate so I don't have to parse the sql results by hand. That's one of the points of using Hibernate, isn't it? Right now I have Hibernate mappings that map each column in Table A to a field (well the get/set methods I guess) in a DAO object that I wrote just to hold that Table's data. I could also use the Hibernate DAOs I have to access each table separately and do each of the things I mentioned above in separate steps, but that would be less efficient (I assume) that doing one query. I wrote a Service object to hold the data that gets returned from the query (my example is simplified - I'm going to keep some other data from Table A and get multiple columns from Table B) but I'm at a loss for how to write a DAO that can do the join, or use the DAOs I have to do the join. FYI, here is a sample of my hibernate config file (simplified to match my example): <hibernate-mapping package="com.my.dao"> <class name="TableA" table="table_a"> <id name="pkIndex" column="pk_index" /> <property name="userGuid" column="user_guid" /> <property name="managerGuid" column="manager_guid" /> </class> </hibernate-mapping> So then I have a DAOImplementation class that does queries and returns lists like public List<TableA> findByHQL(String hql, Map<String, String> params) etc. I'm not sure how "best practice" that is either.

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• Portlet container like pluto or jetspeed on google app engine?

  - by Patrick Cornelissen

  I am trying to build something "portlet server"-ish on the google app engine. (as open source) I'd like to use the JSR168/286 standards, but I think that the restrictions of the app engine will make it somewhere between tricky and impossible. Has anyone tried to run jetspeed or an application that uses pluto internally on the google app engine? Based on my current knowledge of portlets and the google app engine I'm anticipating these problems: A war file with portlets is from the deployment standpoint more or less a complete webapp (yes, I know that it doesn't really work without a portal server). The war file may contain it's own web.xml etc. This makes deployment on the app engine rather difficult, because the apps are not visible to each other, so all portlet containing archives need to be included in the war file of the deployed "app engine based portal server". The "portlets" are (at least in liferay) started as permanent servlet processes, based on their portlet.xmls and web.xmls which is located in the same spot for every portlet archive that is loaded. I think this may be problematic in the app engine, because everything is in one big "web app", so it may be tricky to access the portlet.xmls from each archive. This prevents a 100% compatibility in my opinion. Is here anyone who has any experience with the combination of portlets and the app engine? Do you think it's feasible to modify jetspeed, pluto or any other portlet container to be able to run it on the app engine?

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• JSF vs Stripes, which is best?

  - by Davoink

  Which is best, or in other words, whish is easiest to use? Stripes or JSF. Although I haven't used both in anger I need to gauge what is the best option to work with for both starting new projects and converting existing Struts projects. I have a fear that JSF won't render as nicely as I want but what are others experiences? Seems Stripes is far more straight forward, would I be correct in this assumption? Cheers.

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• How to center Label vertical and horizontal in draw2d Figure ?

  - by aphex

  I have the following situation: Label label = new Label(); label.setText("bla"); RoundedRectangle fig = new RoundedRectangle(); fig.add(label); FlowLayout layout = new FlowLayout(); layout.setStretchMinorAxis(true); fig.setLayoutManager(layout); fig.setOpaque(true); That works only to center the label vertical or horizontal by using layout.setHorizontal(true/false); , but not together. Any idea how to make it work ?

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• Use of Hibernate 3.0 with EJB 3.0 & JPA

  - by SOA Nerd

  Where I'm working the guys that are sitting across from me are working on a project. This is a JavaEE app which uses Struts, Spring, EJB 3.0, JPA, and Hibernate 3.0. They are using EJB 3.0 entity beans with annotations. I've been asking them why Hibernate 3.0 is in this mix and noone can seem to tell me. It feels like they've included Hibernate 3.0 because they were told to but are not using it for anything that they can't get from EJB 3.0 entity beans/JPA. They're using CMP and accessing all of the database functions via EJBs. Can Hibernate give you anything in this setup that can't be provided by EJB 3.0/JPA?

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