Questions on Spring-Config. conversion, function, property, generate

amy

Hi, I have some basic questions about Spring.

1. How do I pass Dates in the config file? This line is throwing a String to Date conversion error.

lt;property name=quot;del_version_datequot; value=quot;12/27/2007quot; /gt;

2. How can I bind a property to the return value of a function, instead of hardcoding it into the bean-config file.

e.g., I want the del_version_date to get the value new Date(System.currentTimemillis);.

3. How do I generate tons of beans? Lets say I want 20 beans for my clients. Do I have to write 20 data sets in the bean config or is there another strategy.

Thanks in advance.

Bump!!!!!!!

You bump fast ... !

From your question (especially point 3.), I have the feeling that you are trying to declare entities (the objects that should be in the database) in your spring config ... tell me if I am wrong ...

For point 1, have a look at the manual 5.4.2 and following. Basically, you have to register a CustomDateEditor.

For point 2, no idea.

For point 3, I'd like to know a bit more about what you are trying to do. Why do you need 20 instances of the same bean ? Mabe what you want is a prototype scope, but I have a feeling that there is something wrong in your understanding of Spring ...


Originally Posted by gehelFor point 2, no idea.

Probably, not the best solution, but it should workCode:
public class DateProvider { public Date getCurrentDate() {     return new Date(); }
}
and in contextCode:
lt;bean id=quot;dateProviderquot; class=quot;DateProviderquot;/gt;

lt;bean id=quot;iNeedCurrentDatequot; class=quot;INeedCurrentDatequot;gt;  lt;property name=quot;del_version_datequot; ref=quot;dateProvider.currentDatequot; /gt;
lt;/beangt;
Originally Posted by gehelYou bump fast ... !

From your question (especially point 3.), I have the feeling that you are trying to declare entities (the objects that should be in the database) in your spring config ... tell me if I am wrong ...

For point 1, have a look at the manual 5.4.2 and following. Basically, you have to register a CustomDateEditor.

For point 2, no idea.

For point 3, I'd like to know a bit more about what you are trying to do. Why do you need 20 instances of the same bean ? Mabe what you want is a prototype scope, but I have a feeling that there is something wrong in your understanding of Spring ...

Yes, I am just starting to learn Spring.  Thanks for the answers above.


Originally Posted by al0
Code:
lt;bean id=quot;dateProviderquot; class=quot;DateProviderquot;/gt;

lt;bean id=quot;iNeedCurrentDatequot; class=quot;INeedCurrentDatequot;gt;  lt;property name=quot;del_version_datequot; ref=quot;dateProvider.currentDatequot; /gt;
lt;/beangt;Exactly what am looking for... thanks!

I had figured it out up to a custom DateProvider, but did not know how to bind the property (del_version_date) to ref-bean dateProvider's specific property (currentDate). So the answer is the dot notation - dateProvider.currentDate.

Thanks a lot.

Sorry, but my answer was partially wrong, you can not just use dot notation,
it should be Code:
lt;bean id=quot;iNeedCurrentDatequot; class=quot;INeedCurrentDatequot;gt;    lt;property name=quot;del_version_datequot;gt;          lt;util:property-path id=quot;currentDatequot; path=quot;dateProvider.currentDatequot;/gt;     lt;/propertygt;
lt;/beangt;
or, alternativelyCode:
lt;bean id=quot;iNeedCurrentDatequot; class=quot;INeedCurrentDatequot;gt;   lt;property name=quot;del_version_datequot;gt;         lt;bean id=quot;testBean.agequot; class=quot;org..beans.factory.config.PropertyPathFactoryBeanquot;/gt;   lt;/propertygt;
or

Code:
lt;bean id=quot;iNeedCurrentDatequot; class=quot;INeedCurrentDatequot;gt;   lt;property name=quot;del_version_datequot;gt;         lt;bean factory-bean=quot;dateProviderquot; factory-method=quot;getCurrentDatequot;/gt;   lt;/propertygt;
Likely, more alternatives may be found.

Regards,
OleksandrOriginally Posted by jaspreet_incExactly what am looking for... thanks!

I had figured it out up to a custom DateProvider, but did not know how to bind the property (del_version_date) to ref-bean dateProvider's specific property (currentDate). So the answer is the dot notation - dateProvider.currentDate.

Thanks a lot.

Originally Posted by al0Sorry, but my answer was partially wrong, you can not just use dot notation,
it should be

Interestingly, simple dot notation did work, and I see the date value inserted into the DB (12/28/2007 12:00:00 AM). Here is my code:Code:
lt;!-- TODO - How to bind this property to a function call? --gt;
lt;property name=quot;del_version_datequot; ref=quot;dateGenerator.datequot; /gt;

lt;bean id=quot;dateGeneratorquot; class=quot;hibernate.spring.DateGeneratorquot;gt;
lt;descriptiongt;Returns the current time.lt;/descriptiongt;
lt;/beangt;package hibernate.spring;

import java.sql.Date;

public class DateGenerator {
@SuppressWarnings(quot;unusedquot;)
private Date date;

public Date getDate() {
return new Date(System.currentTimeMillis());
}

}Yes, now I recognized it, see 3.3.3.7 in Spring 2.0.7 Reference.

Approaches from my second post you need if you want not just set bean property, but create a separate bean from value of some property.Originally Posted by jaspreet_incInterestingly, simple dot notation did work, and I see the date value inserted into the DB (12/28/2007 12:00:00 AM). Here is my code:Code:
lt;!-- TODO - How to bind this property to a function call? --gt;
lt;property name=quot;del_version_datequot; ref=quot;dateGenerator.datequot; /gt;

lt;bean id=quot;dateGeneratorquot; class=quot;hibernate.spring.DateGeneratorquot;gt;
lt;descriptiongt;Returns the current time.lt;/descriptiongt;
lt;/beangt;package hibernate.spring;

import java.sql.Date;

public class DateGenerator {
@SuppressWarnings(quot;unusedquot;)
private Date date;

public Date getDate() {
return new Date(System.currentTimeMillis());
}

}


Originally Posted by al0Yes, now I recognized it, see 3.3.3.7 in Spring 2.0.7 Reference.

Sorry to confuse you, but the dot notation DID NOT WORK.

I am trying one your alternatives, but nothing is working yet.

To simplify, can you illustrate in a different example please?

Lets say bean A has a property propa, whose value needs to be the return of bean B's method funcb. Code:
class A { private Date propa;  public Date getPropa(){
     return propa;
}
public void setPropa(Date propa){
     this.propa = propa;
}}

class B { public Date funcb {     return new Date(System.currentTimeMillis()); }
}
Whats the entry for

lt;property name=quot;propaquot; value=quot;??quot; ref=quot;??quot;gt;

and

Bean B entry to return funcb to propa?

Thank you. And also where can I read up on this?