height of the list component at ireport

I have a list component in my report that displays a set of data.Its height is determined during runtime according to the size of the Set(JRBeanCollectionDataSource).I want to create a rectangle whose height is the same as the list.How can i do this? Thanks.

Update: enter image description here

Update 2: ireport look enter image description here

<frame>
                <reportElement x="0" y="127" width="502" height="548"/>
                <frame>
                    <reportElement x="21" y="0" width="460" height="180"/>
                    <componentElement>
                        <reportElement x="203" y="0" width="257" height="55"/>
                        <jr:list xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" printOrder="Vertical">
                            <datasetRun subDataset="dataset1">
                                <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{inventors})]]></dataSourceExpression>
                            </datasetRun>
                            <jr:listContents height="55" width="257">
                                <textField isStretchWithOverflow="true">
                                    <reportElement x="50" y="0" width="47" height="18"/>
                                    <textElement>
                                        <font pdfEncoding="Cp1254"/>
                                    </textElement>
                                    <textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
                                </textField>
                                <textField isStretchWithOverflow="true">
                                    <reportElement x="97" y="0" width="100" height="18"/>
                                    <textElement/>
                                    <textFieldExpression><![CDATA[$F{surname}]]></textFieldExpression>
                                </textField>
                                <textField isStretchWithOverflow="true">
                                    <reportElement x="72" y="18" width="100" height="18"/>
                                    <textElement/>
                                    <textFieldExpression><![CDATA[$F{department}]]></textFieldExpression>
                                </textField>
                                <textField isStretchWithOverflow="true">
                                    <reportElement x="61" y="36" width="100" height="18"/>
                                    <textElement/>
                                    <textFieldExpression><![CDATA[$F{appellation}]]></textFieldExpression>
                                </textField>
                                <line>
                                    <reportElement x="0" y="54" width="256" height="1"/>
                                </line>
                                <line>
                                    <reportElement x="0" y="0" width="1" height="54"/>
                                </line>
                                <line direction="BottomUp">
                                    <reportElement x="256" y="0" width="1" height="54"/>
                                </line>
                            </jr:listContents>
                        </jr:list>
                    </componentElement>
                    <rectangle>
                        <reportElement stretchType="RelativeToTallestObject" x="61" y="0" width="142" height="164"/>
                    </rectangle>
                    <staticText>
                        <reportElement x="73" y="7" width="119" height="63"/>
                        <textElement>
                            <font size="12" isBold="true" pdfEncoding="Cp1254"/>
                        </textElement>
                        <text><![CDATA[Buluş Bildiren Çalışan’ın Adı/Soyadı/Bölümü/Görevi]]></text>
                    </staticText>
                    <rectangle>
                        <reportElement stretchType="RelativeToTallestObject" x="0" y="0" width="61" height="164"/>
                    </rectangle>
                    <staticText>
                        <reportElement x="10" y="7" width="40" height="139"/>
                        <textElement rotation="Left">
                            <font size="10" isBold="true" pdfEncoding="Cp1254"/>
                        </textElement>
                        <text><![CDATA[BULUŞ BİLDİREN ÇALIŞANLARLA  İLGİLİ BİLGİLER]]></text>
                    </staticText>
                </frame>
                <staticText>
                    <reportElement x="21" y="180" width="459" height="139"/>
                    <textElement markup="none">
                        <font pdfEncoding="Cp1254"/>
                    </textElement>
                    <text><![CDATA[Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.]]></text>
                </staticText>
                                </frame>

Solution

You can put List element and Rectangle in Frame container.

The sample:

<detail>
    <band height="20" splitType="Stretch">
        <textField>
            <reportElement x="0" y="0" width="100" height="20"/>
            <textElement/>
            <textFieldExpression><![CDATA[$F{ADDRESS_FIRSTNAME}]]></textFieldExpression>
        </textField>
        <textField>
            <reportElement x="100" y="0" width="100" height="20"/>
            <textElement/>
            <textFieldExpression><![CDATA[$F{ADDRESS_CITY}]]></textFieldExpression>
        </textField>
        <frame>
            <reportElement x="200" y="0" width="324" height="20"/>
            <componentElement>
                <reportElement x="0" y="0" width="155" height="20"/>
                <jr:list xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" printOrder="Vertical">
                    <datasetRun subDataset="dataset1">
                        <datasetParameter name="addressId">
                            <datasetParameterExpression><![CDATA[$F{ADDRESS_ID}]]></datasetParameterExpression>
                        </datasetParameter>
                        <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
                    </datasetRun>
                    <jr:listContents height="20" width="155">
                        <textField isStretchWithOverflow="true">
                            <reportElement x="0" y="0" width="62" height="20"/>
                            <textElement/>
                            <textFieldExpression><![CDATA["Total docs: " + $F{DOCUMENT_TOTAL}]]></textFieldExpression>
                        </textField>
                    </jr:listContents>
                </jr:list>
            </componentElement>
            <rectangle>
                <reportElement stretchType="RelativeToTallestObject" x="155" y="0" width="100" height="20"/>
            </rectangle>
        </frame>
    </band>
</detail>

You should set stretchType property for rectangle as RelativeToTallestObject and set textField's (lying in list) isStretchWithOverflow property as true.

The result will be:

enter image description here