is there any ready to use code? any further information on where to get it?
thanx for the promising looking code.
I have written code to enable initialization of a bean using initialization parameters from a database table. The code can be downloaded from:
http://members.cox.net/jwebutil/InitParameters.zip
How to use it:
1. Create a bean class net.sourceforge.MyBean. To use the following example, create setWebMaster(...) and getWebMaster() methods.
2. Create a database table called "InitParametersTable", with columns named "Parameter" and "Value". You may change these using the SQL shown below.
Enter the names and values of the parameters you wish to use as the rows in the table.
e.g. Parameter: WEBMASTER
Value: The web master
3. Create a datasource with id="DATASOURCE" or whatever id you wish to use.
4. Create an InitParameters bean, specifying the DataSource and SQL needed to access the table.
<bean id="initParameters"
class="net.sourceforge.jwebutil.util.initparameters.InitP arametersFactory"
factory-method="createInstance">
<description>Database Init Parameters</description>
<constructor-arg index="0"><ref bean="DATASOURCE" /></constructor-arg>
<constructor-arg index="1">
<value>
<![CDATA[
SELECT Parameter, Value FROM InitParametersTable;
]]>
</value>
</constructor-arg>
</bean>
5. Create a bean, using the PropertyMapper factory. Specify the bean's class using the "targetClass" property. Specify the bean's properties using the "properties" property. Each key refers a property of the bean. Each value refers to the name of the Initialization Parameter in the database table.
<bean id="myBean" class="net.sourceforge.jwebutil.util.initparameters.Prope rtyMapper">
<description>Global Application Configuration properties</description>
<property name="targetClass"><value>net.sourceforge.MyBean</value></property>
<property name="initParameters"><ref bean="initParameters" /></property>
<property name="properties">
<props>
<prop key="webMaster">#WEBMASTER</prop>
</props>
</property>
</bean>
Notes:
1) Mandatory initialization parameters are indicated by a preceding "#". e.g. <prop key="webMaster">#WEBMASTER</prop>
2) Default values are indicated by a semi-colon followed by the default value. e.g. <prop key="webMaster">WEBMASTER;Tom Swift</prop>
3. You can specify a reference to a bean by preceding its name with a "*". e.g. <prop key="theBean">*theBeanRef</prop>
4. You can specify a value for a property by preceding its value with a "@". e.g. <prop key="webMaster">@Tom Swift@yahoo.com</prop>. In this case, the value of the property is used as-is, without looking it up in the InitParameters object.
5. All of your custom Property Editors are supported.
6. The InitializingBean and DisposableBean interfaces are supported. You can also specify a method to be called after all of the bean's properties are set - e.g. <property name="initMethod"><value>init</value></property>. In addition, you can specify a destroyMethod e.g. <property name="destroyMethod"><value>destroy</value></property>.
7. You can update all beans at any time by calling propertyMapManager().refreshAll()
8. You can update an individual bean at any time by calling propertyMapManager().refresh(theBean)
9. You can also use initialization parameters from the ServletContext, JNDI context, any Map, any Properties object, etc - see the InitParametersFactory class.
10. Use <property name="singleton"><value>false</value></property> to specify that the bean is a prototype. The default is "true", specifying a singleton.
11. Comments are appreciated...