conf/digesterRules.xml

<?xml version="1.0"?>
<!DOCTYPE digester-rules PUBLIC "-//Jakarta Apache //DTD digester-rules XML V1.0//EN" "http://jakarta.apache.org/commons/digester/dtds/digester-rules.dtd">

<digester-rules>

    <pattern value="configuration/properties">
        <object-create-rule classname="org.apache.commons.configuration.PropertiesConfiguration"/>
        <set-properties-rule/>
        <set-next-rule methodname="addConfiguration" paramtype="org.apache.commons.configuration.Configuration"/>
        <call-method-rule methodname="load"/>
    </pattern>

    <pattern value="configuration/xml">
        <object-create-rule classname="org.apache.commons.configuration.XMLConfiguration"/>
        <set-properties-rule/>
        <set-next-rule methodname="addConfiguration" paramtype="org.apache.commons.configuration.Configuration"/>
        <call-method-rule methodname="load"/>
    </pattern>

    <pattern value="configuration/jndi">
        <object-create-rule classname="org.apache.commons.configuration.JNDIConfiguration"/>
        <set-properties-rule/>
        <set-next-rule methodname="addConfiguration" paramtype="org.apache.commons.configuration.Configuration"/>
    </pattern>

</digester-rules>