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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[JAVA-3918] Nested wildcard generic type stops automatic POJO codec creation</title>
                <link>https://jira.mongodb.org/browse/JAVA-3918</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;Using nested wildcard generic types causes exception and no automatic POJO codec will be build. I have a helper method of this style in a model class:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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&lt;p/&gt;

&lt;p&gt;Processing the return type of this method via &lt;tt&gt;PojoBuilderHelper.configureClassModelBuilder()&lt;/tt&gt; throws an exception in &lt;tt&gt;TypeDate.getNestedTypeData()&lt;/tt&gt; in the &lt;tt&gt;type instanceof WildcardType&lt;/tt&gt; branch. This tries to cast the result of &lt;tt&gt;((WildcardType) type).getUpperBounds()&lt;span class=&quot;error&quot;&gt;&amp;#91;0&amp;#93;&lt;/span&gt;&lt;/tt&gt; to &lt;tt&gt;Class&lt;/tt&gt; which will not work in this case as the upper bound type is a ParameterizedType. An exception is thrown which stops the automatic Codec creation.&lt;/p&gt;

&lt;p&gt;This issue was introduced in &lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-3390&quot; title=&quot;Support wildcard types in the PojoCodec&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-3390&quot;&gt;&lt;del&gt;JAVA-3390&lt;/del&gt;&lt;/a&gt; and prevents us from updating to a 4.x driver version. It is also unfortunate that even the &lt;tt&gt;@BsonIgnore&lt;/tt&gt; does not prevent this from happening.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1576125">JAVA-3918</key>
            <summary>Nested wildcard generic type stops automatic POJO codec creation</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="sebastianbober@fico.com">Sebastian Bober</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 Dec 2020 13:41:51 +0000</created>
                <updated>Wed, 19 Apr 2023 17:12:00 +0000</updated>
                                            <version>4.1.1</version>
                                                    <component>POJO</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3540736" author="jeff.yemin" created="Wed, 23 Dec 2020 13:13:57 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=guntermartens%40fico.com&quot; class=&quot;user-hover&quot; rel=&quot;guntermartens@fico.com&quot;&gt;guntermartens@fico.com&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Thanks, I see that the cases have already been linked. &lt;/p&gt;
</comment>
                            <comment id="3539450" author="jeff.yemin" created="Tue, 22 Dec 2020 13:59:28 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=sebastianbober%40fico.com&quot; class=&quot;user-hover&quot; rel=&quot;sebastianbober@fico.com&quot;&gt;sebastianbober@fico.com&lt;/a&gt;, &lt;/p&gt;

&lt;p&gt;Thanks for reporting this issue.  We will investigate and get back to you, though probably slower than usual due to the upcoming holidays.&lt;/p&gt;

&lt;p&gt;If you have already opened a support case, please let me know.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Jeff&lt;/p&gt;</comment>
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