BIRT Report - Borked Nested Data Set Example

<?xml version="1.0" encoding="UTF-8"?>
<report xmlns="http://www.eclipse.org/birt/2005/design" version="3.2.23" id="1">
    <property name="createdBy">Eclipse BIRT Designer Version 4.2.1.v201209101448 Build &lt;4.2.1.v20120912-1721></property>
    <property name="units">in</property>
    <property name="iconFile">/templates/blank_report.gif</property>
    <property name="bidiLayoutOrientation">ltr</property>
    <property name="imageDPI">96</property>
    <data-sources>
        <script-data-source name="Scripted Data Source" id="7"/>
    </data-sources>
    <data-sets>
        <script-data-set name="Outer Data Set" id="8">
            <list-property name="resultSetHints">
                <structure>
                    <property name="position">1</property>
                    <property name="name">key</property>
                    <property name="dataType">string</property>
                </structure>
            </list-property>
            <list-property name="columnHints">
                <structure>
                    <property name="columnName">key</property>
                </structure>
            </list-property>
            <structure name="cachedMetaData">
                <list-property name="resultSet">
                    <structure>
                        <property name="position">1</property>
                        <property name="name">key</property>
                        <property name="dataType">string</property>
                    </structure>
                </list-property>
            </structure>
            <property name="dataSource">Scripted Data Source</property>
            <method name="open"><![CDATA[importPackage(Packages.java.util);

map = new HashMap();
for (index = 0; index < 10; index++){
    var list = new ArrayList();
    for (index2 = 0; index2 < 5; index2++) {
        list.add("value[" + index + "][" + index2 + "]");
    }
    map.put("key" + index, list);
}
keys = new ArrayList(map.keySet());
Collections.sort(keys);
keys = keys.iterator();]]></method>
            <method name="fetch"><![CDATA[if (!keys.hasNext() ) {
    return false;
}

var key = keys.next();
var value = map.get(key);

row["key"] = key;
vars["values"] = value;

return true;]]></method>
        </script-data-set>
        <script-data-set name="Inner Data Set" id="9">
            <list-property name="resultSetHints">
                <structure>
                    <property name="position">1</property>
                    <property name="name">value</property>
                    <property name="dataType">string</property>
                </structure>
            </list-property>
            <list-property name="columnHints">
                <structure>
                    <property name="columnName">value</property>
                </structure>
            </list-property>
            <structure name="cachedMetaData">
                <list-property name="resultSet">
                    <structure>
                        <property name="position">1</property>
                        <property name="name">value</property>
                        <property name="dataType">string</property>
                    </structure>
                </list-property>
            </structure>
            <property name="dataSource">Scripted Data Source</property>
            <method name="open"><![CDATA[values = vars["values"].iterator();
]]></method>
            <method name="fetch"><![CDATA[if (!values.hasNext() ) {
    return false;
}

row["value"] = values.next();

return true;]]></method>
        </script-data-set>
    </data-sets>
    <styles>
        <style name="report" id="4">
            <property name="fontFamily">sans-serif</property>
            <property name="fontSize">10pt</property>
        </style>
        <style name="crosstab-cell" id="5">
            <property name="borderBottomColor">#CCCCCC</property>
            <property name="borderBottomStyle">solid</property>
            <property name="borderBottomWidth">1pt</property>
            <property name="borderLeftColor">#CCCCCC</property>
            <property name="borderLeftStyle">solid</property>
            <property name="borderLeftWidth">1pt</property>
            <property name="borderRightColor">#CCCCCC</property>
            <property name="borderRightStyle">solid</property>
            <property name="borderRightWidth">1pt</property>
            <property name="borderTopColor">#CCCCCC</property>
            <property name="borderTopStyle">solid</property>
            <property name="borderTopWidth">1pt</property>
        </style>
        <style name="crosstab" id="6">
            <property name="borderBottomColor">#CCCCCC</property>
            <property name="borderBottomStyle">solid</property>
            <property name="borderBottomWidth">1pt</property>
            <property name="borderLeftColor">#CCCCCC</property>
            <property name="borderLeftStyle">solid</property>
            <property name="borderLeftWidth">1pt</property>
            <property name="borderRightColor">#CCCCCC</property>
            <property name="borderRightStyle">solid</property>
            <property name="borderRightWidth">1pt</property>
            <property name="borderTopColor">#CCCCCC</property>
            <property name="borderTopStyle">solid</property>
            <property name="borderTopWidth">1pt</property>
        </style>
    </styles>
    <page-setup>
        <simple-master-page name="Simple MasterPage" id="2">
            <page-footer>
                <text id="3">
                    <property name="contentType">html</property>
                    <text-property name="content"><![CDATA[<value-of>new Date()</value-of>]]></text-property>
                </text>
            </page-footer>
        </simple-master-page>
    </page-setup>
    <body>
        <list id="10">
            <property name="dataSet">Outer Data Set</property>
            <list-property name="boundDataColumns">
                <structure>
                    <property name="name">key</property>
                    <text-property name="displayName">key</text-property>
                    <expression name="expression" type="javascript">dataSetRow["key"]</expression>
                    <property name="dataType">string</property>
                </structure>
            </list-property>
            <detail>
                <grid id="11">
                    <column id="12"/>
                    <column id="13"/>
                    <row id="14">
                        <cell id="15">
                            <data id="24">
                                <property name="resultSetColumn">key</property>
                            </data>
                        </cell>
                        <cell id="16">
                            <list id="18">
                                <property name="dataSet">Inner Data Set</property>
                                <list-property name="boundDataColumns">
                                    <structure>
                                        <property name="name">value</property>
                                        <text-property name="displayName">value</text-property>
                                        <expression name="expression" type="javascript">dataSetRow["value"]</expression>
                                        <property name="dataType">string</property>
                                    </structure>
                                </list-property>
                                <detail>
                                    <grid id="19">
                                        <column id="20"/>
                                        <row id="21">
                                            <cell id="22">
                                                <data id="25">
                                                    <property name="resultSetColumn">value</property>
                                                </data>
                                            </cell>
                                        </row>
                                    </grid>
                                </detail>
                            </list>
                        </cell>
                    </row>
                </grid>
            </detail>
        </list>
    </body>
    <property name="pageVariables">
        <variable-element name="values">
            <property name="type">report</property>
        </variable-element>
    </property>
</report>