Background Spring 3.x, JPA 2.0, Hibernate 4.x, Postgresql 9.x. Working on a Hibernate mapped class with an enum property that I want to map to a Postgresql enum. Problem Querying with a where clause on the enum column throws an exception. Code (heavily simplified) SQL: Hibernate mapped class: Java that calls …
Why HashMap with generic declaration ” does not accept value “new Object()” in the put method?
While working on interview questions, I have come across below code: The above two put method’s are throwing compile time error. But, when I add m.put(3, new ArrayList()); it is adding to map with no compile time error. It is very clear for me that I can add new Object() as a value in HashMap because of…
Websocket Client Could not find an implementation class
I will preface this with I am not using any maven dependencies, yet I know that I am missing a jar file wls-api.jar (at least that is what I have read). To remedy this I downloaded the oracle-weblogic-7.9.jar but the problem persists. The exception is thrown at this line Can anyone tell me why this line conti…
Coding Bat Recursion exercise (java)
How can I solve this problem recursively instead of using the replace method? I’m trying to get better a recursive methods. Given a string, compute recursively (no loops) a new string where all the lowercase ‘x’ chars have been changed to ‘y’ chars. I cheated and solved it this w…
JSONPath resolver for Java objects
How can I get a value from an Java object instead from a JSON string by applying a JSONPath expression? I receive a Java object that is created from a JSON string (via Jackson, no way to influence it): I further have some JSONPath expressions as Java Strings reflecting values in the object (they might be much…
java.lang.Exception: Public keys in reply and keystore don’t match
I have to access a webservice hosted at port 443.Service provider has shared three certificate with us. ABCD.cer CA_Certificate.cer CCA_Certificate.cer I have to add them to keystore by creating a form chain for the SSL communication.I have followed below steps. keytool -keystore npci_keystore_test.jks -genke…
How to download XLSX file through firefox using Selenium in Java?
I am trying to download an xlsx file using the following code: But the test stops after displaying the download dialog box, and it is not downloading any file. But if i try the same code for csv file by changing the mime type mentioned in the above code, then it works fine. Please help me. Thank you. Answer I…
Maven Hangs Downloading Inside a Docker Container
I have a gitlab with gitlab ci and a runner all running fine in a CoreOs Machine. All 3 services are running using the following dockerfiles service files and build script: Build Script: CI service: CI-runner service: Ci runner dockerfile: Ci dockerfile is unmodified version of sameersbn/gitlab-ci:5.2.0. when…
validating the Aadhar card number in a application
we are developing a application which need to check whether user entering valid “AADHAR” number or not. i find some links and some “apis” but didn’t meet final requirement please provide me a some useful material to solve this What is Aadhaar? Aadhaar is a 12 digit individual ide…
Detached entity passed to persist when save the child data
I’m getting this error when submitting the form: org.hibernate.PersistentObjectException: detached entity passed to persist: com.project.pmet.model.Account; nested exception is javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.project…