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54 lines
1.4 KiB
Markdown
54 lines
1.4 KiB
Markdown
---
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title: PSI Cookbook
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---
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This page gives a list of recipes for the most common operations for working with the PSI (Program Structure Interface) of IntelliJ Platform. Unlike
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[Developing Custom Language Plugins](/reference_guide/custom_language_support.html),
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it talks about working with the PSI of existing languages (such as Java).
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### How do I find a file if I know its name but don't know the path?
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```FilenameIndex.getFilesByName()```
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### How do I find where a particular PSI element is used?
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```ReferencesSearch.search()```
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### How do I rename a PSI element?
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```RefactoringFactory.createRename()```
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### How can I cause the PSI for a virtual file to be rebuilt?
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```FileContentUtil.reparseFiles()```
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## Java Specific
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### How do I find all inheritors of a class?
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```ClassInheritorsSearch.search()```
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### How do I find a class by qualified name?
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```JavaPsiFacade.findClass()```
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### How do I find a class by short name?
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```PsiShortNamesCache.getInstance().getClassesByName()```
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### How do I find a superclass of a Java class?
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```PsiClass.getSuperClass()```
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### How do I get a reference to the containing package of a Java class?
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```java
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PsiJavaFile javaFile = (PsiJavaFile) psiClass.getContaningFile();
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PsiPackage pkg = JavaPsiFacade.getInstance(project).findPackage(javaFile.getPackageName());
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```
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### How do I find the methods overriding a specific method?
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```OverridingMethodsSearch.search()```
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