Jira report plugin, add properties dinamically

Hi everyone,

I am developing a report plugin, there is a file called atlassian-plugin.xml where I have the report properties, more exactly I have only one property, a selector.

    <properties>

      <property>
        <key>selectedSprint</key>
        <name>report.issuecreation.sprint.name</name>
        <type>select</type>
        <values class="com.jiraPlugin.utility.GetSprintsForUI"/>
      </property>

    </properties>

What I need to add here now are some properties related to the selected project, I want to add some textboxes but the number of textboxes depends on the project.
Is there any way to do that?
Thank you