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BIRT designer beforeOpen() not resolving function in external javascript file for a dataset

wtfacoconut · 2015-05-20T16:31:36+00:00

Environment: - BIRT Designer v4.3.2 Problem: I have a…

wtfacoconut

<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">Environment:</p>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">- BIRT Designer v4.3.2</p>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">Problem: I have a dataset that runs a query to retrieve data from a SQL DB and I'm trying to execute a javascript function that exists in an external js file. When trying to view the "Output Columns" for that dataset I get the following error:</p>
<pre class="_prettyXprint">
org.eclipse.birt.data.engine.core.DataException: Fail to execute script in function __bm_beforeOpen(). Source:

" + util.evaluateQueryTextExpressions(this); + "

A BIRT exception occurred. See next exception for more information.
ReferenceError: "util" is not defined. (<inline>#1)</pre>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">The javascript file which contains the function has been added to the report as a resource.</p>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">NOTE: When I actually generate the report, everything works fine as intended. However it's only in BIRT designer whenever I try to view "Output Columns" or "Preview Results" do I encounter this problem.</p>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">Assistance with resolving this problem will be greatly appreciated.</p>
<p style="font-size:15px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">Thanks!</p>

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Comments

JFreeman

<p>I have tried reproducing this with an external javascript file I use for logging purposes. When I call it from the beforeOpen of a data set it works properly when viewing output columns and previewing results as well as running the report.</p>
<p> </p>
<p>Can you provide a sample report and javascript file that replicates the behavior you are seeing?</p>

shivkumar150

<p>Hi JFreeman,</p>
<p> </p>
<p>I have tried a simple report wherein I need to get values from the XML Files/books.xml. When tried to view the report I'm getting an error as below:</p>
<p> </p>
<p><span><span>org.eclipse.birt.report.engine.api.EngineException: There are errors evaluating script "var xhttp = new XMLHttpRequest();":<br>
Fail to execute script in function __bm_OPEN(). Source:<br>

<br>
" + var xhttp = new XMLHttpRequest(); + "<br>

<br>
A BIRT exception occurred. See next exception for more information.<br>
ReferenceError: "XMLHttpRequest" is not defined.</span></span></p>
<pre class="_prettyXprint _lang-xml _linenums:1">
<?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 4.5.0.v201506092134 Build <@BUILD@></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="ScriptedDataSource" id="4">
<method name="open"><![CDATA[var xhttp = new XMLHttpRequest();]]></method>
<method name="close"><![CDATA[var xhttp=null;]]></method>
</script-data-source>
</data-sources>
<data-sets>
<script-data-set name="DataSet" id="5">
<list-property name="resultSetHints">
<structure>
<property name="position">1</property>
<property name="name">BookNames</property>
<property name="dataType">string</property>
</structure>
</list-property>
<list-property name="columnHints">
<structure>
<property name="columnName">BookNames</property>
</structure>
</list-property>
<structure name="cachedMetaData">
<list-property name="resultSet">
<structure>
<property name="position">1</property>
<property name="name">BookNames</property>
<property name="dataType">string</property>
</structure>
</list-property>
</structure>
<property name="dataSource">ScriptedDataSource</property>
<method name="open"><![CDATA[xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
myFunction(xhttp);
}
}
xhttp.open("GET", "XML Files/books.xml", true);
xhttp.send();

function myFunction(xml){
var xmlDoc = xml.responseXML;
var x=xmlDoc.getElementsByTagName("title")[0].childNodes[0];
var txt=x.nodeValue;
count=2;
}
]]></method>
<method name="fetch"><![CDATA[if(count<2){
row["BookNames"]=txt;
count++;
return true
}
else return false;]]></method>
</script-data-set>
</data-sets>
<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>
<table id="6">
<property name="dataSet">DataSet</property>
<list-property name="boundDataColumns">
<structure>
<property name="name">BookNames</property>
<text-property name="displayName">BookNames</text-property>
<expression name="expression" type="javascript">dataSetRow["BookNames"]</expression>
<property name="dataType">string</property>
</structure>
</list-property>
<column id="15"/>
<header>
<row id="7">
<cell id="8">
<label id="9">
<text-property name="text">BookNames</text-property>
</label>
</cell>
</row>
</header>
<detail>
<row id="10">
<cell id="11">
<data id="12">
<property name="resultSetColumn">BookNames</property>
</data>
</cell>
</row>
</detail>
<footer>
<row id="13">
<cell id="14"/>
</row>
</footer>
</table>
</body>
</report>

</pre>
<p>Can you suggest any method, to open the XML file in BIRT using javascript?</p>
<p>or am I doing scripting in the wrong method of Datasource?</p>