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Entity Read | IntelliJ Platform Plugin SDK

EntityStorage provides the ability to query data from WorkspaceModel.

To request all entities of the concrete type use EntityStorage.entities().

// Take a copy of the current storage val currentSnapshot: ImmutableEntityStorage = WorkspaceModel.getInstance(project).currentSnapshot // Search for the module with the given name throughout the whole list val moduleEntity: ModuleEntity? = currentSnapshot.entities(ModuleEntity::class.java) .find { it.name == moduleName } // Extension function shortcut for // EntityStorage.entities(E::class.java) currentSnapshot.entities<ModuleEntity>()

Throughout the entity's lifecycle, a number of internal indexes are created and maintained to speed up certain types of searches.

This index stores information about entities' EntitySource and allows obtaining all entities matching the given predicate.

val currentSnapshot: ImmutableEntityStorage = WorkspaceModel.getInstance(project).currentSnapshot // Querying all entities of different types // but with concrete entitySource currentSnapshot.entitiesBySource { it is GradleEntitySource }.forEach { // ... }

EntityStorage.getVirtualFileUrlIndex() provides a way to quickly find entities referring to a particular VirtualFileUrl.

val currentSnapshot: ImmutableEntityStorage = WorkspaceModel.getInstance(project).currentSnapshot // Searching all entities with the given path currentSnapshot.getVirtualFileUrlIndex() .findEntitiesByUrl(virtualFileUrl)

Allows searching for an entity by its SymbolicEntityId.

val moduleId = ModuleId("moduleName") val entityStorage: ImmutableEntityStorage = WorkspaceModel.getInstance(project).currentSnapshot entityStorage.resolve(moduleId)

Provides a way to associate WorkspaceEntity with an external data type. The association survives modifications of an entity, and is automatically removed when the entity is deleted. Use MutableEntityStorage.getMutableExternalMapping() to fill the index and EntityStorage.getExternalMapping() to access it.

In the following example, data stored in instances of Foo is associated with ModuleEntity.

// Сlass whose instances we want to store in the index data class Foo(val someData: String) // Unique identifier of the concrete mapping val externalMappingKey = ExternalMappingKey.create<Foo>("intellij.foo") val mutableEntityStorage = WorkspaceModel.getInstance(project) .currentSnapshot.toBuilder() // Getting mutable instance of specific mapping val mutableFooExternalMapping = mutableEntityStorage.getMutableExternalMapping(externalMappingKey) val moduleEntity = mutableEntityStorage .entities(ModuleEntity::class.java).single() // Associate data with specific `ModuleEntity` mutableFooExternalMapping.addMapping(moduleEntity, Foo("someData"))

// Сlass whose instances we want to store in the index data class Foo(val someData: String) // Unique identifier of the concrete mapping val externalMappingKey = ExternalMappingKey.create<Foo>("intellij.foo") val entityStorage = WorkspaceModel.getInstance(project).currentSnapshot // Immutable instance of specific mapping val fooExternalMapping = entityStorage .getExternalMapping(externalMappingKey) val moduleEntity = entityStorage .entities(ModuleEntity::class.java).single() // Getting the data associated with specific `ModuleEntity` val foo = fooExternalMapping.getDataByEntity(moduleEntity)

11 September 2024

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