如何在(Jasper Studio)的mongo DB查询中创建动态/可选过滤器(参数)

<parameter name="productName" class="java.lang.String"/>
<parameter name="minPrice" class="java.lang.Double"/>
<parameter name="maxPrice" class="java.lang.Double"/>

<queryString><![CDATA[{
    "collectionName": "yourCollection",
    "query": {
        "$and": [
            {"$expr": {"$eq": [{"$ifNull": ["$productName", ""]}, {"$ifNull": ["$P{productName}", ""]}]}},
            {"$expr": {"$gte": ["$price", {"$ifNull": ["$P{minPrice}", -Infinity]}]}}},
            {"$expr": {"$lte": ["$price", {"$ifNull": ["$P{maxPrice}", Infinity]}]}}]
    }
}]]></queryString>

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="DynamicFiltersReport" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <parameter name="productName" class="java.lang.String"/>
    <parameter name="minPrice" class="java.lang.Double"/>
    <parameter name="maxPrice" class="java.lang.Double"/>
    <queryString><![CDATA[{
        "collectionName": "yourCollection",
        "query": {
            "$and": [
                {"$expr": {"$eq": [{"$ifNull": ["$productName", ""]}, {"$ifNull": ["$P{productName}", ""]}]}},
                {"$expr": {"$gte": ["$price", {"$ifNull": ["$P{minPrice}", -Infinity]}]}}},
                {"$expr": {"$lte": ["$price", {"$ifNull": ["$P{maxPrice}", Infinity]}]}}]
        }
    }]]></queryString>
    <!-- 其他报表定义 -->
</jasperReport>