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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HSEARCH?atlOrigin=eyJpIjoiZDRhYzJiOTE1MDA0NGUwMWI5YTQ5NzRmMjMyZWJiOGUiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-3971?atlOrigin=eyJpIjoiZDRhYzJiOTE1MDA0NGUwMWI5YTQ5NzRmMjMyZWJiOGUiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-134dcc5a-dda7-4d99-b24a-7f2f095bf8f4" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3971?atlOrigin=eyJpIjoiZDRhYzJiOTE1MDA0NGUwMWI5YTQ5NzRmMjMyZWJiOGUiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HSEARCH-3971</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3971?atlOrigin=eyJpIjoiZDRhYzJiOTE1MDA0NGUwMWI5YTQ5NzRmMjMyZWJiOGUiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Mapping an entity differently based on a discriminator</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-134dcc5a-dda7-4d99-b24a-7f2f095bf8f4" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"> New Feature </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> mapper-pojo </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 27/Jul/2020 03:39 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Fix Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 6.1 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="yrodiere" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_yrodiere" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A58fa1ced-171a-4c00-97e8-5d70d442cc4b"> Yoann Rodière </a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Follow-up on <span class="jira-issue-macro" data-jira-key="HSEARCH-3311"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3311" class="jira-issue-macro-key issue-link" title="Test (and document) alternatives to analyzer discriminators in Search 6" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=medium&avatarId=12158&avatarType=issuetype"> HSEARCH-3311 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-current jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Pull Request Sent</span> </span> .</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">In some cases, one could benefit of mapping an entity differently depending on </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">There are two use cases to distinguish:</p>
<ol>
<li>I want a different set of fields depending on a discriminator. This could be solved by including all fields in the schema, but populating them only when needed at runtime: e.g. only index <tt>largeTextField</tt> when <tt>entityState</tt> is <tt>ACTIVE</tt>, but not when it's <tt>ARCHIVED</tt>.</li>
<li>I want the same fields, but configured differently depending on a discriminator. This could be solved by mapping the same entity type to multiple indexes ( <span class="jira-issue-macro" data-jira-key="HSEARCH-3683"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3683" class="jira-issue-macro-key issue-link" title="Mapping a single entity type to multiple indexes" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=medium&avatarId=12150&avatarType=issuetype"> HSEARCH-3683 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-complete jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Open</span> </span> ) with <b>a different schema</b> (not included in <span class="jira-issue-macro" data-jira-key="HSEARCH-3683"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3683" class="jira-issue-macro-key issue-link" title="Mapping a single entity type to multiple indexes" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=medium&avatarId=12150&avatarType=issuetype"> HSEARCH-3683 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-complete jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Open</span> </span> ), and creating the documents in the relevant index at runtime ; e.g. map "BlogPost" to <tt>blogposts_fr</tt> and <tt>blogposts_de</tt>, use a different analyzer on the <tt>text</tt> field in each index, and route blog posts with <tt>language = FR</tt> to <tt>blogposts_fr</tt>, blog posts with <tt>language = DE</tt> to <tt>blogposts_de</tt>.</li>
</ol> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Usecase1%3Aenable%2Fdisablefieldsbasedonadiscriminator" style="color: #3b73af; text-decoration: none"></a>Use case 1: enable/disable fields based on a discriminator</h3> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Both use cases could be addressed with the concept of "groups" introduced in <span class="jira-issue-macro" data-jira-key="HSEARCH-3903"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3903" class="jira-issue-macro-key issue-link" title="Filters based exclusively on mapper metadata for @IndexedEmbedded" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=medium&avatarId=12151&avatarType=issuetype"> HSEARCH-3903 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-complete jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Open</span> </span> . The user would provide a component that enables or disables "groups" dynamically, based on the state of the entity. All the groups that <b>can</b> be selected would be included in the index schema, and when indexing some fields would get enabled or not based on the dynamic group selection.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This would provide a feature similar to the <tt>AlternativeBinder</tt>, but much more powerful.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">There is one unknown, though: how would <tt>@IndexedEmbedded.includeGroups</tt> interact with the dynamic group selection? If dynamic group selection is overridden by <tt>@IndexedEmbedded.includeGroups</tt>, it will likely not work as intended for the "multi-language" use case of <tt>AlternativeBinder</tt>. If dynamic group selection ignores <tt>@IndexedEmbedded.includeGroups</tt>, it will become impossible to exclude dynamically enabled fields from <tt>@IndexedEmbedded</tt>.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Maybe we should separate the two concepts, e.g. <tt>@GenericField(groups = ..., dynamicGroups = ...)</tt>?</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Or maybe we should assign a static group to the "dynamic group resolver": the resolver and all corresponding fields would be included in the schema if the resolver's assigned static group is included, even if the field's (dynamic) groups are not included. Then it would be the user's responsibility to make sure static and dynamic groups use different names, so as not to include dynamic groups statically by mistake.</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Usecase2%3Aroutetoadifferentindexwithadifferentschemabasedonadiscriminator" style="color: #3b73af; text-decoration: none"></a>Use case 2: route to a different index with a different schema based on a discriminator</h3> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This should only be a matter of building upon what is described above and the work done in HSEARCH-3683: when declaring the indexes an entity type is mapped to, we would also declare the groups of field that are enabled for each index. Then at runtime, when an entity is routed to an index, it would use the appropriate mapping.</p> </td>
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