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stub_indexes.md: add Kotlin sample for stubElementTypeHolder EP

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Yann Cébron 2023-01-12 14:32:38 +01:00
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topics/basics/indexing_and_psi_stubs/stub_indexes.md
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[//]: # (title: Stub Indexes) # Stub Indexes
<!-- Copyright 2000-2022 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file. --> <!-- Copyright 2000-2023 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file. -->
## Stub Trees ## Stub Trees
@ -28,7 +28,9 @@ The following steps need to be performed only once for each language that suppor
* In your <path>[plugin.xml](plugin_configuration_file.md)</path>, define the `com.intellij.stubElementTypeHolder` extension and specify the interface which contains the `IElementType` constants used by your language's parser. * In your <path>[plugin.xml](plugin_configuration_file.md)</path>, define the `com.intellij.stubElementTypeHolder` extension and specify the interface which contains the `IElementType` constants used by your language's parser.
Define common `externalIdPrefix` to be used for all stub element types (see [`StubElementTypeHolderEP`](%gh-ic%/platform/core-api/src/com/intellij/psi/stubs/StubElementTypeHolderEP.java) docs for important requirements). Define common `externalIdPrefix` to be used for all stub element types (see [`StubElementTypeHolderEP`](%gh-ic%/platform/core-api/src/com/intellij/psi/stubs/StubElementTypeHolderEP.java) docs for important requirements).
**Example**: [`JavaStubElementTypes`](%gh-ic%/java/java-psi-impl/src/com/intellij/psi/impl/java/stubs/JavaStubElementTypes.java) registered in [`JavaPsiPlugin.xml`](%gh-ic%/java/java-psi-impl/src/META-INF/JavaPsiPlugin.xml) **Examples**:
- [`JavaStubElementTypes`](%gh-ic%/java/java-psi-impl/src/com/intellij/psi/impl/java/stubs/JavaStubElementTypes.java) registered in [`JavaPsiPlugin.xml`](%gh-ic%/java/java-psi-impl/src/META-INF/JavaPsiPlugin.xml)
- see [`Angular2HtmlStubElementTypes`](%gh-ij-plugins-master%/AngularJS/src/org/angular2/lang/html/stub/Angular2HtmlStubElementTypes.kt) for Kotlin sample
For each element type that you want to store in the stub tree, you need to perform the following steps: For each element type that you want to store in the stub tree, you need to perform the following steps:

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<var name="gh-ij-android" value="https://git.jetbrains.org/?p=idea/android.git;hb=refs/tags/idea/%ijPlatformBuild%;a=blob;f="/> <var name="gh-ij-android" value="https://git.jetbrains.org/?p=idea/android.git;hb=refs/tags/idea/%ijPlatformBuild%;a=blob;f="/>
<!-- <var name="gh-ij-android" value="https://github.com/JetBrains/android/tree/idea/%ijPlatformBuild%"/>--> <!-- <var name="gh-ij-android" value="https://github.com/JetBrains/android/tree/idea/%ijPlatformBuild%"/>-->
<var name="gh-ij-plugins" value="https://github.com/JetBrains/intellij-plugins/tree/idea/%ijPlatformBuild%"/>
<var name="gh-ij-plugins-master" value="https://github.com/JetBrains/intellij-plugins/tree/master"/>
</vars> </vars>