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    <title>MongoDB Jira</title>
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    <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-3925] DocumentCodec ignores registry when writing Iterable or Map instances</title>
                <link>https://jira.mongodb.org/browse/JAVA-3925</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;Using POJO serialization, updates seem to be problematic.  Considering this POJO:&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;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	@BsonId&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	public String key;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	@BsonProperty(&quot;value&quot;)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	public ObjectNode value;  &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt; 
&lt;p&gt;Note, the &quot;value&quot; is Jackson.  &lt;/p&gt;

&lt;p&gt;To support this, it was registered a custom Codec for ObjectNode.  Updates will not invoke the codec.  For example:&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;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	Document setters = new Document(&quot;value&quot;, Mappers.getJacksonMapper().createObjectNode());&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	Document d = new Document(&quot;$set&quot;, setters);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	// does not invoke codec, you get []&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	pojoCollection.updateOne(new Document(&quot;_id&quot;, &quot;key1&quot;), d);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;  

&lt;p&gt;The ObjectNode is replaced with [] in the resulting BSON, which makes subsequent POJO reads fail. &lt;/p&gt;

&lt;p&gt;After some investigation, it was identified the root cause is &lt;span class=&quot;error&quot;&gt;&amp;#91;this line&amp;#93;&lt;/span&gt;(&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L192&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L192&lt;/a&gt;) in the DocumentCodec.  &lt;span class=&quot;error&quot;&gt;&amp;#91;This line&amp;#93;&lt;/span&gt;(&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L192&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L192&lt;/a&gt;) special-cases encoding instances of &lt;em&gt;Iterable&lt;/em&gt; with its own encoder.  Normally this is not an issue. However in this case it is an issue because &lt;em&gt;ObjectNode&lt;/em&gt; extends &lt;em&gt;JsonNode&lt;/em&gt; which implements &lt;em&gt;Iterable&amp;lt;JsonNode&amp;gt;&lt;/em&gt;. This prevents the process from falling through to &lt;span class=&quot;error&quot;&gt;&amp;#91;this line&amp;#93;&lt;/span&gt;(&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L197&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/blob/r3.12.5/bson/src/main/org/bson/codecs/DocumentCodec.java#L197&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;As a workaround,   the ObjectNode can be wrapped in some other class that does not implement &lt;em&gt;Iterable&lt;/em&gt;, and provide a codec for that class as well. &lt;/p&gt;</description>
                <environment></environment>
        <key id="1585331">JAVA-3925</key>
            <summary>DocumentCodec ignores registry when writing Iterable or Map instances</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="jeff.yemin@mongodb.com">Jeffrey Yemin</assignee>
                                    <reporter username="conchi.bueno@mongodb.com">Conchi Bueno</reporter>
                        <labels>
                    </labels>
                <created>Sun, 10 Jan 2021 22:56:35 +0000</created>
                <updated>Sat, 28 Oct 2023 11:21:30 +0000</updated>
                            <resolved>Mon, 1 Nov 2021 15:01:02 +0000</resolved>
                                                    <fixVersion>4.4.0</fixVersion>
                                    <component>Codecs</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4160539" author="xgen-internal-githook" created="Mon, 1 Nov 2021 15:00:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jeff Yemin&apos;, &apos;email&apos;: &apos;jeff.yemin@mongodb.com&apos;, &apos;username&apos;: &apos;jyemin&apos;}
&lt;p&gt;Message: Use CodecRegistry in DocumentCodec for Iterable and Map instances (#811)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Instead of using private methods within DocumentCodec to encode instances&lt;br/&gt;
of Iterable and Map, look up the Codec in the registry as with&lt;br/&gt;
any other instance.&lt;/li&gt;
	&lt;li&gt;Instead of using a private method within DocumentCodec to decode BSON arrays,&lt;br/&gt;
lookup up the Codec in the registry according to the type mapped to array in the &lt;br/&gt;
BsonTypeClassMap.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-3925&quot; title=&quot;DocumentCodec ignores registry when writing Iterable or Map instances&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-3925&quot;&gt;&lt;del&gt;JAVA-3925&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/commit/53b0ff156a33d883ec6c78a64d2c9c3d14e9218c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/commit/53b0ff156a33d883ec6c78a64d2c9c3d14e9218c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3557178" author="john.lilley@redpointglobal.com" created="Mon, 11 Jan 2021 11:57:44 +0000"  >&lt;p&gt;This is the workaround we implemented for the issue.&#160; Unfortunately, it cannot be added to existing code, you must retrofit POJOs with the wrapper type.&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;See attached codec_example.txt&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
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