mirror of
https://github.com/JetBrains/intellij-sdk-code-samples.git
synced 2025-07-27 16:57:49 +08:00
79 lines
2.9 KiB
Markdown
79 lines
2.9 KiB
Markdown
<!-- Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
|
|
|
|
# PSI Cookbook
|
|
|
|
<link-summary rel="excerpt"/>
|
|
<p id="excerpt">
|
|
This page gives recipes for the most common operations for working with the PSI (Program Structure Interface).
|
|
</p>
|
|
|
|
Unlike [Developing Custom Language Plugins](custom_language_support.md), it is about working with the PSI of existing languages (such as Java).
|
|
|
|
> See also the [](psi_performance.md) section.
|
|
>
|
|
|
|
## General
|
|
|
|
### How do I find a file if I know its name but don't know the path?
|
|
|
|
[`FilenameIndex.getFilesByName()`](%gh-ic%/platform/indexing-api/src/com/intellij/psi/search/FilenameIndex.java)
|
|
|
|
### How do I find where a particular PSI element is used?
|
|
|
|
[`ReferencesSearch.search()`](%gh-ic%/platform/indexing-api/src/com/intellij/psi/search/searches/ReferencesSearch.java)
|
|
|
|
### How do I rename a PSI element?
|
|
|
|
[`RefactoringFactory.createRename()`](%gh-ic%/platform/lang-api/src/com/intellij/refactoring/RefactoringFactory.java)
|
|
|
|
### How can I cause the PSI for a virtual file to be rebuilt?
|
|
|
|
[`FileContentUtil.reparseFiles()`](%gh-ic%/platform/analysis-api/src/com/intellij/util/FileContentUtil.java)
|
|
|
|
## Java Specific
|
|
|
|
> If your plugin depends on Java functionality, see [](plugin_compatibility.md#java).
|
|
> Also consider using [UAST](uast.md) if your plugin supports other JVM languages.
|
|
>
|
|
{style="note"}
|
|
|
|
### How do I find all inheritors of a class?
|
|
|
|
[`ClassInheritorsSearch.search()`](%gh-ic%/java/java-indexing-api/src/com/intellij/psi/search/searches/ClassInheritorsSearch.java)
|
|
|
|
### How do I find a class by qualified name?
|
|
|
|
[`JavaPsiFacade.findClass()`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/JavaPsiFacade.java)
|
|
|
|
### How do I find a class by short name?
|
|
|
|
[`PsiShortNamesCache.getClassesByName()`](%gh-ic%/java/java-indexing-api/src/com/intellij/psi/search/PsiShortNamesCache.java)
|
|
|
|
### How do I find a superclass of a Java class?
|
|
|
|
[`PsiClass.getSuperClass()`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/PsiClass.java)
|
|
|
|
### How do I get a reference to the containing package of a Java class?
|
|
|
|
```java
|
|
PsiJavaFile javaFile = (PsiJavaFile) psiClass.getContainingFile();
|
|
PsiPackage psiPackage = JavaPsiFacade.getInstance(project)
|
|
.findPackage(javaFile.getPackageName());
|
|
```
|
|
|
|
or
|
|
|
|
[`PsiUtil.getPackageName()`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/util/PsiUtil.java)
|
|
|
|
### How do I find the methods overriding a specific method?
|
|
|
|
[`OverridingMethodsSearch.search()`](%gh-ic%/java/java-indexing-api/src/com/intellij/psi/search/searches/OverridingMethodsSearch.java)
|
|
|
|
### How do I check the presence of a JVM library?
|
|
<primary-label ref="2023.2"/>
|
|
|
|
Use dedicated (and heavily cached) methods from [`JavaLibraryUtil`](%gh-ic%/java/openapi/src/com/intellij/java/library/JavaLibraryUtil.java):
|
|
|
|
- `hasLibraryClass()` to check presence via known library class FQN
|
|
- `hasLibraryJar()` using Maven coordinates (for example, `io.micronaut:micronaut-core`).
|