Hashmap « Data Type « JPA Q&A





1. use HashMap in Hibernate?    coderanch.com

Originally posted by necati sekkeli: Because the previously coded software uses hashMap and it will be too costly if we will try to change that design. It uses Serializable and User Defined parameter as variable. Not sure I follow what you mean by "Serializable and User Defined parameter"? Serializable is an interface. The reason Hibernate does not use Maps is probably ...

3. HashMap and JPA (TopLink)    java.net

4. hibernate framework using hashmap    forum.hibernate.org

i am fresher in hibernate. Can i create a common framework to insert into database tables using hashmap? Explanation: I have more tables in my database. table1 = {tablename1, column11, value11, column21, value21, ...columnN1, valueN1}. table2 = {tablename2, column12, value12, column22, value22, ...columnN2, valueN2}. ........... tableN = {tablenameN, column1N, value1N, column2N, value2N, ...columnNN, valueNN}. Data structure for insert datas into tables. ...

5. Hashmap problem    forum.hibernate.org

Folks I posting this to see if there is a quick fix to my problem. Here it is... We have an hibernate application(hibernate 2.03) running on iSeries vR52 using Websphere v5.1 and the native iSeries DB2 jdbc driver(via a Websphere V5 datasource) that appears to run fine until we have a network problem. At the point of a network issue (i.e. ...

6. issue with hashmap of entity classes    forum.hibernate.org

I have a Profile object, that I would like to contain a hashmap of ProfilePreference objects, where the hashmap key, is an identifier for the preference_id- located in a lookup table. When creating the profile initially, Hibernate does a fine job of inserting records for the map, and reading them back. However, when I update one of the objects in the ...

7. Blob + Hashmap    forum.hibernate.org

8. Hibernate with objects that have member variables in HashMap    forum.hibernate.org

Hi I have a interesting problem. We use XML based metada(Proprietary) for our software and instead of generating classes for each object, we have a generic object that gets it's attributes from this metadata and they sit in a HashMap as name, value pairs. We have methods like getAttributeValue(String attributeName) to return value. Now we want to persist this objects in ...

9. Localized descriptions with HashMap    forum.hibernate.org

Hi all, Forgive me if this is answered elsewhere but I haven't found anything yet. I have an object called House, house will have a HashMap of descriptions. The descriptions will be accessed with a locale object. ie Map map = house.getDescriptions(); System.out.println(map.get(Locale.EN)); Here comes the confusion. 1)There doesn't seem to be many examples of using a HashMap to be found ...





10. Using classes as Keys in a hibernate HashMap.    forum.hibernate.org

11. Store Hashmap with null values    forum.hibernate.org

Hi I want to persist a Hashmap. Key and value types are both strings. This is a basic task for Hibernate and well documented. The problem comes when the map contains null values. Hibernate will not save key/value pairs when the value is null (key is not null). When the value is not null it is saved. When I change the ...

12. HashMap / Enum keys as columns? Non-finite columns    forum.hibernate.org

I'm currently developing an application that has some interesting constraints and am evaluating if Hibernate is the right persistence mechanism to use. The application stores a large number of individual names and attributes about these names. Each individual, or "Entity", can have a number of vary attributes that describe the Entity. The number of attributes, theoretically, is not finite. For example, ...

13. hibernating a HashMap through annotations?    forum.hibernate.org

Hibernate version: 3.0 Name and version of the database you are using: MySql I'm looking for an example of how to set up my annotations to hibernate a simple java hashmap to a MySql database. Given an extremely simple class as defined below, what should the annotations be to cause this to hibernate the HashMap propHash correctly. Any help would be ...

14. Problem using HashMap: PropertyAccessException    forum.hibernate.org

There is something wrong in my mapping file, but I have no idea what it is... I want to use a HashMap to store key-value Strings and get a org.hibernate.PropertyAccessException I set hibernate.cglib.use_reflection_optimizer=false Hibernate version:3.1 Mapping documents: ... ... POJO Class ... private java.util.HashMap attributes; public java.util.HashMap ...

15. Caching whole lookup table in HashMap efficiently    forum.hibernate.org

I have one HUGE (legacy) lookup table that consists of say three columns (a, b, c) where a and b are the lookup key and c is the desired value. Columns a,b are not a primary key, so that for any a,b a set of many c's may be returned. Without Hibernate (in non-JEE) I read this whole table with one ...

16. Criteria Statement with Hashmap Key and Value Combination    forum.hibernate.org

Hibernate version: 3 Hi Guys, i need help with creating a criteria statement. I have the following classes (not my real project, simplyfied example): Entity Code: import java.util.Map; public class Person { private long id; private String name; private Map test; public long getId() { ...





17. How to cast a Hashmap to a Clob?    forum.hibernate.org

18. Hashmap with Entity as Keys    forum.hibernate.org

Unit testing would suggest Equals and Hashcode implementations are valid and that there are no issues getting values out of the Map for non-Hibernate managed objects. When I run the test using an entity retrieved form the database via Hibernate, then: TeeType nonHibernate = a; TeeType fromHibernate = b; [1] a.equals(b) is true [2] a.hasCode() == b.hashCode() is true [3] map.containsKey(a) ...