Package org.gradle.api

Interface DomainObjectCollection<T>

Type Parameters:

T - The type of domain objects in this collection.

All Superinterfaces:

Collection<T>, Iterable<T>

All Known Subinterfaces:

ArtifactRepositoryContainer, ArtifactTypeContainer, AuthenticationContainer, BinaryTasksCollection, BuildDashboardReports, BuildTypeContainer, CheckstyleReports, CodeNarcReports, ConfigurationContainer, DependencyConstraintSet, DependencyReportContainer, DependencySet, DistributionContainer, DomainObjectSet<T>, ExtensiblePolymorphicDomainObjectContainer<T>, FindBugsReports, FlavorContainer, IvyArtifactSet, IvyConfigurationContainer, JacocoReportsContainer, JarBinarySpec.TasksCollection, JDependReports, JvmTestSuiteBinarySpec.JvmTestSuiteTasks, MavenArtifactSet, NamedDomainObjectCollection<T>, NamedDomainObjectContainer<T>, NamedDomainObjectList<T>, NamedDomainObjectSet<T>, NativeExecutableBinarySpec.TasksCollection, NativeTestSuiteBinarySpec.TasksCollection, NativeToolChainRegistry, PlatformContainer, PlayDistributionContainer, PluginCollection<T>, PluginContainer, PmdReports, PolymorphicDomainObjectContainer<T>, PrebuiltLibraries, ProjectSourceSet, PublicationContainer, PublishArtifactSet, ReportContainer<T>, Repositories, RepositoryHandler, SharedLibraryBinarySpec.TasksCollection, SoftwareComponentContainer, SourceSetContainer, StaticLibraryBinarySpec.TasksCollection, TaskCollection<T>, TaskContainer, TestSuiteTaskCollection, TestTaskReports

public interface DomainObjectCollection<T>
extends Collection<T>

A DomainObjectCollection is a specialised Collection that adds the ability to receive modification notifications and use live filtered sub collections.

The filtered collections returned by the filtering methods, such as matching(Closure), return collections that are live. That is, they reflect changes made to the source collection that they were created from. This is true for filtered collections made from filtered collections etc.

You can also add actions which are executed as elements are added to the collection. Actions added to filtered collections will be fired if an addition/removal occurs for the source collection that matches the filter.

DomainObjectCollection instances are not thread-safe and undefined behavior may result from the invocation of any method on a collection that is being mutated by another thread; this includes direct invocations, passing the collection to a method that might perform invocations, and using an existing iterator to examine the collection.

Method Summary

Modifier and Type	Method	Description
void	addAllLater(Provider<? extends Iterable<T>> provider)	Adds elements to this collection, given a Provider of Iterable that will provide the elements when required.
void	addLater(Provider<? extends T> provider)	Adds an element to this collection, given a Provider that will provide the element when required.
void	all(Closure action)	Executes the given closure against all objects in this collection, and any objects subsequently added to this collection.
void	all(Action<? super T> action)	Executes the given action against all objects in this collection, and any objects subsequently added to this collection.
void	configureEach(Action<? super T> action)	Configures each element in this collection using the given action, as each element is required.
Collection<T>	findAll(Closure spec)	Returns a collection which contains the objects in this collection which meet the given closure specification.
DomainObjectCollection<T>	matching(Closure spec)	Returns a collection which contains the objects in this collection which meet the given closure specification.
DomainObjectCollection<T>	matching(Spec<? super T> spec)	Returns a collection which contains the objects in this collection which meet the given specification.
void	whenObjectAdded(Closure action)	Adds a closure to be called when an object is added to this collection.
Action<? super T>	whenObjectAdded(Action<? super T> action)	Adds an Action to be executed when an object is added to this collection.
void	whenObjectRemoved(Closure action)	Adds a closure to be called when an object is removed from this collection.
Action<? super T>	whenObjectRemoved(Action<? super T> action)	Adds an Action to be executed when an object is removed from this collection.
<S extends T> DomainObjectCollection<S>	withType(Class<S> type)	Returns a collection containing the objects in this collection of the given type.
<S extends T> DomainObjectCollection<S>	withType(Class<S> type, Closure configureClosure)	Returns a collection containing the objects in this collection of the given type.
<S extends T> DomainObjectCollection<S>	withType(Class<S> type, Action<? super S> configureAction)	Returns a collection containing the objects in this collection of the given type.

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, parallelStream, remove, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

addLater

@Incubating
void addLater(Provider<? extends T> provider)

Adds an element to this collection, given a Provider that will provide the element when required. Note: this method currently has a placeholder name and will almost certainly be renamed.

Parameters:

provider - A Provider that can provide the element when required.

Since:

4.8

addAllLater

@Incubating
void addAllLater(Provider<? extends Iterable<T>> provider)

Adds elements to this collection, given a Provider of Iterable that will provide the elements when required. Note: this method currently has a placeholder name and will almost certainly be renamed.

Parameters:

provider - A Provider of Iterable that can provide the elements when required.

Since:

5.0

withType

<S extends T> DomainObjectCollection<S> withType(Class<S> type)

Returns a collection containing the objects in this collection of the given type. The returned collection is live, so that when matching objects are later added to this collection, they are also visible in the filtered collection.

Parameters:

type - The type of objects to find.

Returns:

The matching objects. Returns an empty collection if there are no such objects in this collection.

withType

<S extends T> DomainObjectCollection<S> withType(Class<S> type,
                                                 Action<? super S> configureAction)

Returns a collection containing the objects in this collection of the given type. Equivalent to calling withType(type).all(configureAction)

Parameters:

type - The type of objects to find.

configureAction - The action to execute for each object in the resulting collection.

Returns:

The matching objects. Returns an empty collection if there are no such objects in this collection.

withType

<S extends T> DomainObjectCollection<S> withType(Class<S> type,
                                                 Closure configureClosure)

Returns a collection containing the objects in this collection of the given type. Equivalent to calling withType(type).all(configureClosure).

Parameters:

type - The type of objects to find.

configureClosure - The closure to execute for each object in the resulting collection.

Returns:

The matching objects. Returns an empty collection if there are no such objects in this collection.

matching

DomainObjectCollection<T> matching(Spec<? super T> spec)

Returns a collection which contains the objects in this collection which meet the given specification. The returned collection is live, so that when matching objects are added to this collection, they are also visible in the filtered collection.

Parameters:

spec - The specification to use.

Returns:

The collection of matching objects. Returns an empty collection if there are no such objects in this collection.

matching

DomainObjectCollection<T> matching(Closure spec)

Returns a collection which contains the objects in this collection which meet the given closure specification. The returned collection is live, so that when matching objects are added to this collection, they are also visible in the filtered collection.

Parameters:

spec - The specification to use. The closure gets a collection element as an argument.

Returns:

The collection of matching objects. Returns an empty collection if there are no such objects in this collection.

whenObjectAdded

Action<? super T> whenObjectAdded(Action<? super T> action)

Adds an Action to be executed when an object is added to this collection.

Like all(Action), this method will cause all objects in this container to be realized.

Parameters:

action - The action to be executed

Returns:

the supplied action

whenObjectAdded

void whenObjectAdded(Closure action)

Adds a closure to be called when an object is added to this collection. The newly added object is passed to the closure as the parameter.

Parameters:

action - The closure to be called

See Also:

whenObjectAdded(Action)

whenObjectRemoved

Action<? super T> whenObjectRemoved(Action<? super T> action)

Adds an Action to be executed when an object is removed from this collection.

Parameters:

action - The action to be executed

Returns:

the supplied action

whenObjectRemoved

void whenObjectRemoved(Closure action)

Adds a closure to be called when an object is removed from this collection. The removed object is passed to the closure as the parameter.

Parameters:

action - The closure to be called

all

void all(Action<? super T> action)

Executes the given action against all objects in this collection, and any objects subsequently added to this collection.

Parameters:

action - The action to be executed

all

void all(Closure action)

Executes the given closure against all objects in this collection, and any objects subsequently added to this collection. The object is passed to the closure as the closure delegate. Alternatively, it is also passed as a parameter.

Parameters:

action - The action to be executed

configureEach

void configureEach(Action<? super T> action)

Configures each element in this collection using the given action, as each element is required. Actions are run in the order added.

Parameters:

action - A Action that can configure the element when required.

Since:

4.9

findAll

Collection<T> findAll(Closure spec)

Returns a collection which contains the objects in this collection which meet the given closure specification.

Parameters:

spec - The specification to use. The closure gets a collection element as an argument.

Returns:

The collection of matching objects. Returns an empty collection if there are no such objects in this collection.