"Illegal group reference"

[OndraZizka]

01:28:58,382 ERROR [stderr](ServerService Thread Pool -- 76) ERROR when parsing programovani/java/howto-spring-reading_properties_file.texy:

java.lang.IllegalArgumentException: Illegal group reference 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) java.lang.IllegalArgumentException: Illegal group reference 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.openjdkregex.Matcher.appendReplacement(Matcher.java:725) 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.modules.HtmlOutputModule.postProcess(HtmlOutputModule.java:158) 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.modules.HtmlOutputModule.access$100(HtmlOutputModule.java:29) 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.modules.HtmlOutputModule$1.onEvent(HtmlOutputModule.java:100) 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.modules.HtmlOutputModule$1.onEvent(HtmlOutputModule.java:96) 01:28:58,383 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.JTexy.invokeNormalHandlers(JTexy.java:350) 01:28:58,384 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.JTexy.stringToHtml(JTexy.java:308) 01:28:58,384 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.JTexy.process(JTexy.java:250) 01:28:58,384 ERROR [stderr](ServerService Thread Pool -- 76) at cz.dynawest.jtexy.JTexy.process(JTexy.java:210)

[OndraZizka]

How to read properties file in Spring Framework
***********************************************

I've had a problem with reading `.properties` file in Spring Framework.
I needed to inject it into the iBatis' `SqlMapConfig.xml`:


/--code xml .[brush:]
  <!-- iBatis -->
  <bean id="sqlMap" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
    <property name="sqlMapClientProperties" value="file:conf/${profile}/nastaveni.properties" />
    <property name="configLocation" value="ibatis-maps/SqlMapConfig2.xml"/>
  </bean>
  <alias alias="iBatis" name="sqlMap"/>
\--



But iBatis kept complaining that the properties defined in the file were not resolved.
Better said, it behaved like the actual value was the property name, thus the code

/--code xml .[brush:]
  <transactionManager type="JDBC">
    <dataSource type="SIMPLE">
      <property name="JDBC.Driver" value="${jdbc.driver}"/>
\--


gave me a `ClassNotFoundException` for the class `jdbc.driver`.

What actually happened was clear when I made a test bean with a property of type `java.lang.Properties`.
Spring takes the file path "file:conf/${profile}/nastaveni.properties" as a Properties string definition
and provides iBatis a `Properties` object with a single property: `file = conf/release/nastaveni.properties`.

The solution is to use the `SqlMapClientFactoryBean`:

/--code xml .[brush:]
  <!-- iBatis -->
  <bean id="sqlMap" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
    <property name="sqlMapClientProperties">
      <bean class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="location" value="file:conf/${profile}/nastaveni.properties"/>
      </bean>
    </property>
    <property name="configLocation" value="ibatis-maps/SqlMapConfig2.xml"/>
  </bean>
\--

Of course, this is a trivial think, but not much well documented.