Dynamic property place holder substitution with Spel

[andrea.tevoi]

Hi everyone,

I'm trying to combine Spel with property place holder. What I'm trying to achieve is something like this:

<bean name="myBean" class="test.MyBean>
<property name="myBooleanProp" value="${#{T(test.MyEnum).MY_ENUM_INSTANCE.key}}"/>
</bean>

So, I would like to pass as property key the value of my enum instance resolved with Spel.

The example above doesn't work. It throws this exception:
org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'boolean' for property 'myBooleanProp'; nested exception is java.lang.IllegalArgumentException: Invalid boolean value [${myEnumInstanceKey}].
The property place holder isn't resolved.

Is there a way to achieve this combination?

Thanks in advance,
Andrea Tevoi

[roger16]

Hi everyone,

I'm trying to combine Spel with property place holder. What I'm trying to achieve is something like this:

<bean name="myBean" class="test.MyBean>
<property name="myBooleanProp" value="${#{T(test.MyEnum).MY_ENUM_INSTANCE.key}}"/>
</bean>

So, I would like to pass as property key the value of my enum instance resolved with Spel.

The example above doesn't work. It throws this exception:
org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'boolean' for property 'myBooleanProp'; nested exception is java.lang.IllegalArgumentException: Invalid boolean value [${myEnumInstanceKey}].
The property place holder isn't resolved.

Is there a way to achieve this combination?

Thanks in advance,
Andrea Tevoi

Hello,

Even am in a similar requirement. Can anyone please help?

Thanks.

[traduz]

I was facing the same problem, and here's my solution:

First declaring the load of the properties file

<util:properties id="properties" location="classpath:job-queries.properties" />

And now using, where varargs[0] is my dinamic variable. It loads the following key from the file is: ServiceRenewJob.hibernate.query for example.

<property name="queryString" value="#{properties[varargs[0] + 'RenewJob.hibernate.query']}"/>

[roger16]

I was facing the same problem, and here's my solution:

First declaring the load of the properties file

<util:properties id="properties" location="classpath:job-queries.properties" />

And now using, where varargs[0] is my dinamic variable. The key it loads from the file is: ServiceRenewJob.hibernate.query for example.

<property name="queryString" value="#{properties[varargs[0] + 'RenewJob.hibernate.query']}"/>

Thanks, but what is varargs[0]? Is this the job parameter? In my case, my key name should have the spring batch job parameter's value.

Thank you.

[traduz]

Not the job parameter.
I have a main class JobRunner:

package com.company.core.batch.launch;
public class JobRunner
{
    public static String[] ARGS;

        public static void main(String[] args) throws Exception
        {
            ARGS = args;
         ...
        }

And in my xml file

<util:constant id="varargs" static-field="com.company.core.batch.launch.JobRunner.ARGS"/>

So in my example when i do

java -jar myjarfile.jar Service

the key is loaded correctly

[roger16]

Ok thanks.

[traduz]

You are welcome. I edited my answer so now it's complete.

[roger16]

Instead of varargs, I substituted the spring batch's job parameters something like below.

<property name="fileName" value="#{systemProperties[jobParameters['fileType'] + '.fileName']}" />

Thanks.