# Package-level declarations

## Types

Action
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@HasImplicitReceiver
interface Action<T>
Performs some action against objects of type T.
ActionConfiguration
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interface ActionConfiguration
Allows specification of configuration for some action.
AntBuilder
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abstract class AntBuilder : AntBuilder
An `AntBuilder` allows you to use Ant from your build script.
Buildable
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interface Buildable
A `Buildable` represents an artifact or set of artifacts which are built by one or more Task instances.
BuildableComponentSpec
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@Incubating
interface BuildableComponentSpec : Buildable, ComponentSpec
A ComponentSpec that is directly Buildable via a specified task.
BuildCancelledException
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open class BuildCancelledException : GradleException
A `BuildCancelledException` is thrown when a build is interrupted due to cancellation request.
CheckableComponentSpec
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@Incubating
interface CheckableComponentSpec : ComponentSpec
A ComponentSpec that is directly checkable via a specified task.
CircularReferenceException
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open class CircularReferenceException : GradleException
A `CircularReferenceException` is thrown if circular references exists between tasks, the project evaluation order or the project dependsOn order.
DefaultTask
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@DisableCachingByDefault(because = "Gradle would require more information to cache this task")
abstract class DefaultTask : AbstractTask, Task
`DefaultTask` is the standard Task implementation.
Describable
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interface Describable
Types can implement this interface when they provide a human-readable display name.
DomainObjectCollection
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interface DomainObjectCollection<T> : Collection<T>
A `DomainObjectCollection` is a specialised Collection that adds the ability to receive modification notifications and use live filtered sub collections.
DomainObjectSet
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@ManagedType
interface DomainObjectSet<T> : DomainObjectCollection<T> , Set<T>
A `DomainObjectSet` is a specialization of DomainObjectCollection that guarantees Set semantics.
ExtensiblePolymorphicDomainObjectContainer
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@ManagedType
interface ExtensiblePolymorphicDomainObjectContainer<T> : PolymorphicDomainObjectContainer<T> , NamedDomainObjectFactoryRegistry<T>
A org.gradle.api.PolymorphicDomainObjectContainer that can be extended at runtime to create elements of new types.
Generated
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@Retention(value = RetentionPolicy.CLASS)
@Target(value = ElementType.TYPE)
@Documented
annotation class Generated
Indicates that the annotated member code was generated.
GradleException
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open class GradleException : RuntimeException
`GradleException` is the base class of all exceptions thrown by Gradle.
GradleScriptException
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open class GradleScriptException : GradleException
A `GradleScriptException` is thrown when an exception occurs in the compilation or execution of a script.
HasImplicitReceiver
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@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Target(value = ElementType.TYPE)
annotation class HasImplicitReceiver
Marks a SAM interface as a target for lambda expressions / closures where the single parameter is passed as the implicit receiver of the invocation (`this` in Kotlin, `delegate` in Groovy) as if the lambda expression was an extension method of the parameter type.
IllegalDependencyNotation
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open class IllegalDependencyNotation : GradleException
This exceptions is thrown, if a dependency is declared with a illegal notation.
Incubating
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@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Target(value = [ElementType.PACKAGE, ElementType.TYPE, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.METHOD])
annotation class Incubating
Indicates that a feature is incubating.
InvalidActionClosureException
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open class InvalidActionClosureException : GradleException
Thrown when a Closure is given as an Action implementation, but has the wrong signature.
InvalidUserCodeException
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open class InvalidUserCodeException : GradleException
A `InvalidUserCodeException` is thrown when user-provided code cannot be executed.
InvalidUserDataException
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open class InvalidUserDataException : GradleException
A `InvalidUserDataException` is thrown, if a user is providing illegal data for the build.
IsolatedAction
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@HasImplicitReceiver
@Incubating
interface IsolatedAction<T> : Serializable
Defines an action that is applied to objects of type T, with each target getting its own isolated action instance.
JavaVersion
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enum JavaVersion
An enumeration of Java versions.
Named
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interface Named
Types can implement this interface and use the embedded Namer implementation, to satisfy API that calls for a namer.
NamedDomainObjectCollection
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interface NamedDomainObjectCollection<T> : DomainObjectCollection<T>
A `NamedDomainObjectCollection` represents a collection of objects that have an inherent, constant, name.
NamedDomainObjectCollectionSchema
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interface NamedDomainObjectCollectionSchema
Schema of named domain object collections.
NamedDomainObjectContainer
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@ManagedType
interface NamedDomainObjectContainer<T> : NamedDomainObjectSet<T> , Configurable<NamedDomainObjectContainer<T>>
A named domain object container is a specialization of NamedDomainObjectSet that adds the ability to create instances of the element type.
NamedDomainObjectFactory
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interface NamedDomainObjectFactory<T>
A factory for named objects of type `T`.
NamedDomainObjectList
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@ManagedType
interface NamedDomainObjectList<T> : NamedDomainObjectCollection<T> , List<T>
A specialization of org.gradle.api.NamedDomainObjectCollection that also implements java.util.List.
NamedDomainObjectProvider
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interface NamedDomainObjectProvider<T> : Provider<T>
Provides a domain object of the given type.
NamedDomainObjectSet
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@ManagedType
interface NamedDomainObjectSet<T> : NamedDomainObjectCollection<T> , DomainObjectSet<T>
A specialization of NamedDomainObjectCollection that also implements Set and orders objects by their inherent name.
Namer
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interface Namer<T>
A namer is capable of providing a name based on some inherent characteristic of an object.
NonExtensible
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@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Inherited
@Target(value = [ElementType.TYPE])
annotation class NonExtensible
Indicates that the type, when DSL enhanced, does not support extensibility.
NonNullApi
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@Target(value = [ElementType.TYPE, ElementType.PACKAGE])
@NotNull
@Nonnull
@TypeQualifierDefault(value = [ElementType.METHOD, ElementType.PARAMETER])
@Documented
@Retention(value = RetentionPolicy.RUNTIME)
annotation class NonNullApi
Marks a type or a whole package as providing a non-null API by default.
PathValidation
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enum PathValidation
An enumeration for describing validation policies for file paths.
Plugin
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interface Plugin<T>
A `Plugin` represents an extension to Gradle.
PolymorphicDomainObjectContainer
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interface PolymorphicDomainObjectContainer<T> : NamedDomainObjectContainer<T>
A NamedDomainObjectContainer that allows you to create objects with different types.
Project
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interface Project : Comparable<Project> , ExtensionAware, PluginAware
This interface is the main API you use to interact with Gradle from your build file.
ProjectConfigurationException
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open class ProjectConfigurationException : DefaultMultiCauseException
Indicates a problem that occurs during project configuration.
ProjectEvaluationListener
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interface ProjectEvaluationListener
An `ProjectEvaluationListener` is notified when a project is evaluated.
ProjectState
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interface ProjectState
`ProjectState` provides information about the execution state of a project.
Rule
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interface Rule
A `Rule` represents some action to perform when an unknown domain object is referenced.
Script
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interface Script
This interface is implemented by all Gradle Groovy DSL scripts to add in some Gradle-specific methods.
SupportsKotlinAssignmentOverloading
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@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Target(value = ElementType.TYPE)
annotation class SupportsKotlinAssignmentOverloading
Marks interface that works with overloaded Kotlin assignment.
Task
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interface Task : Comparable<Task> , ExtensionAware, Named
A `Task` represents a single atomic piece of work for a build, such as compiling classes or generating javadoc.
Transformer
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interface Transformer<OUT, IN>
A `Transformer` transforms objects of type.
UncheckedIOException
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open class UncheckedIOException : RuntimeException
`UncheckedIOException` is used to wrap an java.io.IOException into an unchecked exception.
UnknownDomainObjectException
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open class UnknownDomainObjectException : GradleException
A `UnknownDomainObjectException` is the super class of all exceptions thrown when a given domain object cannot be located.
UnknownProjectException
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open class UnknownProjectException : UnknownDomainObjectException
An `UnknownProjectException` is thrown when a project referenced by path cannot be found.
UnknownTaskException
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open class UnknownTaskException : UnknownDomainObjectException
An `UnknownTaskException` is thrown when a task referenced by path cannot be found.
XmlProvider
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interface XmlProvider
Provides various ways to access the content of an XML document.