java - How to get the value of complex JavaBean -


i have .jrxml file , pass params code it. have order class has fields double price, int quantity , product product. situation simple, when need pass price or quantity, this: 

<textfieldexpression class = "java.lang.integer">    <![cdata[$f{quantity}]]> </textfieldexpression>

the problem appears when try pass product.getname(). tried like:

<textfieldexpression class = "java.lang.string">    <![cdata[$f{product}.getname()]]> </textfieldexpression>

and many others keep getting error: net.sf.jasperreports.engine.design.jrvalidationexception: report design not valid : 1. field not found : product

do have idea how solve problem?

for example have pair of javabeans (pojo):

public class order {      private double price;     private int quantity;     private product product;     // public getters  }  public class product {      private string name;     // public getters  }

and declare report's datasource in manner this: (yes, guava)

jrbeancollectiondatasource datasource = new jrbeancollectiondatasource(lists.newarraylist(immutablelist.<order>builder()         .add(new order(1000.2, 10, new product("phone")))         .add(new order(10200.0, 2, new product("tv")))         .build()));

in case using fields declaration:

<field name="order" class="java.lang.object">     <fielddescription><![cdata[_this]]></fielddescription> </field> <field name="price" class="java.lang.double"/> <field name="quantity" class="java.lang.integer"/> <field name="productname" class="java.lang.string">     <fielddescription><![cdata[product.name]]></fielddescription> </field>

you can use such expressions:

<textfield>     <reportelement x="0" y="0" width="100" height="30"/>     <textfieldexpression><![cdata[$f{price}]]></textfieldexpression> </textfield> <textfield>     <reportelement x="100" y="0" width="100" height="30"/>     <textfieldexpression><![cdata[$f{quantity}]]></textfieldexpression> </textfield> <textfield>     <reportelement x="200" y="0" width="100" height="30"/>     <textfieldexpression><![cdata[$f{productname}]]></textfieldexpression> </textfield>

note:


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