mirror of
https://github.com/JetBrains/intellij-sdk-code-samples.git
synced 2025-07-28 01:07:49 +08:00
112 lines
6.7 KiB
Markdown
112 lines
6.7 KiB
Markdown
[//]: # (title: Library)
|
|
|
|
<!-- Copyright 2000-2020 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. -->
|
|
|
|
A library is an archive of compiled code (such as JAR files) that modules depend on.
|
|
|
|
The IntelliJ Platform supports three types of libraries:
|
|
* **Module Library**: the library classes are visible only in this module and the library information is recorded in the module `.iml` file.
|
|
* **Project Library**: the library classes are visible within the project and the library information is recorded under `.idea/libraries` directory or in the project `.ipr` file.
|
|
* **Global Library**: the library information is recorded in the `applicationLibraries.xml` file in `<User Home>/.IntelliJIdea/config/options` directory. Global libraries are similar to project libraries, but are visible for different projects.
|
|
|
|
For more information about libraries, refer to [Libraries](https://www.jetbrains.com/help/idea/working-with-libraries.html).
|
|
|
|
A particular type of programmatically defined libraries is [Predefined Libraries](#predefined-libraries).
|
|
|
|
## Accessing Libraries and Jars
|
|
Package [`libraries`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/libraries) provides functionality for working with project libraries and jars.
|
|
|
|
### Getting a List of Libraries a Module Depends On
|
|
To get the list of libraries that a module depends on, use `OrderEnumerator.forEachLibrary` as follows.
|
|
|
|
```java
|
|
final List<String> libraryNames = new ArrayList<String>();
|
|
ModuleRootManager.getInstance(module).orderEntries().forEachLibrary(library -> {
|
|
libraryNames.add(library.getName());
|
|
return true;
|
|
});
|
|
Messages.showInfoMessage(StringUtil.join(libraryNames, "\n"), "Libraries in Module");
|
|
```
|
|
|
|
This sample code outputs a list of libraries that the given module depends on.
|
|
|
|
### Getting a List of All Libraries
|
|
To manage the lists of application and project libraries, use [`LibraryTable`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/libraries/LibraryTable.java).
|
|
The list of application-level library tables is accessed by calling `LibraryTablesRegistrar.getInstance().getLibraryTable()`, whereas the list of project-level library tables is accessed through `LibraryTablesRegistrar.getInstance().getLibraryTable()`.
|
|
Once you have a `LibraryTable`, you can get the libraries in it by calling `LibraryTable.getLibraries()`.
|
|
|
|
To get the list of all module libraries defined in a given module, use the following API:
|
|
|
|
```java
|
|
OrderEntryUtil.getModuleLibraries(ModuleRootManager.getInstance(module));
|
|
```
|
|
|
|
### Getting the Library Content
|
|
[`Library`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/libraries/Library.java) provides the `getUrls()` method you can use to get a list of source roots and classes the library includes.
|
|
To clarify, consider the following code snippet:
|
|
|
|
```java
|
|
StringBuilder roots = new StringBuilder("The " + lib.getName() + " library includes:\n");
|
|
roots.append("Sources:\n");
|
|
for (String each : lib.getUrls(OrderRootType.SOURCES)) {
|
|
roots.append(each).append("\n");
|
|
}
|
|
roots.append("Classes:\n");
|
|
for (String each : lib.getUrls(OrderRootType.CLASSES)) {
|
|
strRoots.append(each).append("\n");
|
|
}
|
|
Messages.showInfoMessage(roots.toString(), "Library Info");
|
|
```
|
|
|
|
### Creating a Library
|
|
To create a library, perform the following steps:
|
|
* Get a [write action](general_threading_rules.md#read-write-lock)
|
|
* Obtain the library table to which you want to add the library. Use one of the following, depending on the library level:
|
|
* `LibraryTablesRegistrar.getInstance().getLibraryTable()`
|
|
* `LibraryTablesRegistrar.getInstance().getLibraryTable(Project)`
|
|
* `ModuleRootManager.getInstance(module).getModifiableModel().getModuleLibraryTable()`
|
|
* Create the library by calling `LibraryTable.createLibrary()`
|
|
* Add contents to the library (see below)
|
|
* For a module-level library, commit the modifiable model returned by `ModuleRootManager.getInstance(module).getModifiableModel()`.
|
|
|
|
For module-level libraries, you can also use simplified APIs in the [`ModuleRootModificationUtil`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/ModuleRootModificationUtil.java) class to add a library with a single API call.
|
|
You can find an example of using these APIs in the [project_model](https://github.com/JetBrains/intellij-sdk-code-samples/blob/main/project_model/src/main/java/org/intellij/sdk/project/model/ModificationAction.java) code sample.
|
|
|
|
### Adding Contents or Modifying a Library
|
|
To add or change the roots of a library, you need to perform the following steps:
|
|
* Get a [write action](general_threading_rules.md#read-write-lock)
|
|
* Get a **modifiable model** for the library, using `Library.getModifiableModel()`
|
|
* Use methods such as `Library.ModifiableModel.addRoot()` to perform the necessary changes
|
|
* Commit the model using `Library.ModifiableModel.commit()`.
|
|
|
|
### Adding a Library Dependency to a Module
|
|
Use `ModuleRootModificationUtil.addDependency(module, library)` from under a write action.
|
|
|
|
### Checking Belonging to a Library
|
|
The [`ProjectFileIndex`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/ProjectFileIndex.java) interface implements a number of methods you can use to check whether the specified file belongs to the project library classes or library sources.
|
|
You can use the following methods:
|
|
|
|
* To check if a specified virtual file is a compiled class file use
|
|
```java
|
|
ProjectFileIndex.isLibraryClassFile(virtualFile)
|
|
```
|
|
* To check if a specified virtual file or directory belongs to library classes use
|
|
```java
|
|
ProjectFileIndex.isInLibraryClasses(virtualFileorDirectory)
|
|
```
|
|
* To check if the specified virtual file or directory belongs to library sources use
|
|
```java
|
|
ProjectFileIndex.isInLibrarySource(virtualFileorDirectory)
|
|
```
|
|
|
|
See the [project_model](https://github.com/JetBrains/intellij-sdk-code-samples/blob/main/project_model/src/main/java/org/intellij/sdk/project/model/ProjectFileIndexSampleAction.java) to see how the method mentioned above can be applied.
|
|
|
|
More details on libraries can be found in the [plugin_model](https://github.com/JetBrains/intellij-sdk-code-samples/blob/main/project_model/src/main/java/org/intellij/sdk/project/model/LibrariesAction.java) code sample.
|
|
|
|
## Predefined Libraries
|
|
EP: `com.intellij.additionalLibraryRootsProvider`
|
|
|
|
[`AdditionalLibraryRootsProvider`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/AdditionalLibraryRootsProvider.java)
|
|
Allows providing synthetic/predefined libraries ([`SyntheticLibrary`](upsource:///platform/projectModel-api/src/com/intellij/openapi/roots/SyntheticLibrary.java)) in a project without exposing them in the model.
|
|
By default, they're also hidden from UI.
|