Managing tasks in an organizational hierarchy using Manager View

public class MyHierarchyMgmtService 
{ 
     /*
    Input : Principal Oid for a livecycle user
    Output : Returns true when the user is either the service invoker OR his direct/indirect report.
    */
    boolean isInHierarchy(String principalOid) {

    }
     
    /* 
    Input : Principal Oid for a livecycle user
    Output : List of principal Oids for direct reports of the livecycle user
    A user may get direct reports only for himself OR his direct/indirect reports.
    So the API is functionally equivalent to - 
    isInHierarchy(principalOid) ? <return direct reports> : <return empty list>
    */
    List<String> getDirectReports(String principalOid) {

    }
 
    /* 
    Returns whether a livecycle user has direct reports or not.
    It's functionally equivalent to -
    getDirectReports(principalOid).size()>0
    */
    boolean isManager(String principalOid) {

    }  
}

<component xmlns="http://adobe.com/idp/dsc/component/document"> 
    <component-id>com.adobe.sample.SampleDSC</component-id> 
    <version>1.1</version> 
    <supports-export>false</supports-export> 
      <descriptor-class>com.adobe.idp.dsc.component.impl.DefaultPOJODescriptorImpl</descriptor-class> 
      <services> 
        <service name="MyHierarchyMgmtService" title="My hierarchy management service" orchestrateable="false"> 
        <auto-deploy service-id="MyHierarchyMgmtService" category-id="Sample DSC" major-version="1" minor-version="0" /> 
        <description>Service for resolving hierarchy management.</description> 
         <specifications> 
         <specification spec-id="com.adobe.idp.taskmanager.dsc.enterprise.HierarchyManagementProvider"/> 
         </specifications> 
        <specification-version>1.0</specification-version> 
        <implementation-class>com.adobe.sample.hierarchymanagement.MyHierarchyMgmtService</implementation-class> 
        <request-processing-strategy>single_instance</request-processing-strategy> 
        <supported-connectors>default</supported-connectors> 
        <operation-config> 
            <operation-name>*</operation-name> 
            <transaction-type>Container</transaction-type> 
            <transaction-propagation>supports</transaction-propagation> 
            <!--transaction-timeout>3000</transaction-timeout--> 
        </operation-config> 
        <operations> 
            <operation anonymous-access="true" name="isInHierarchy" method="isInHierarchy"> 
                <input-parameter name="principalOid" type="java.lang.String" /> 
                <output-parameter name="result" type="java.lang.Boolean"/> 
            </operation> 
            <operation anonymous-access="true" name="getDirectReports" method="getDirectReports"> 
                <input-parameter name="principalOid" type="java.lang.String" /> 
                <output-parameter name="result" type="java.util.List"/> 
            </operation> 
            <operation anonymous-access="true" name="isManager" method="isManager"> 
                <input-parameter name="principalOid" type="java.lang.String" /> 
                <output-parameter name="result" type="java.lang.Boolean"/> 
            </operation> 
            </operations> 
            </service> 
      </services>
</component>