org.eclipse.aether.graph

Interface DependencyNode

All Known Implementing Classes:

DefaultDependencyNode

public interface DependencyNode

A node within a dependency graph. To conserve memory, dependency graphs may reuse a given node instance multiple times to represent reoccurring dependencies. As such clients traversing a dependency graph should be prepared to discover multiple paths leading to the same node instance unless the input graph is known to be a duplicate-free tree. Note: Unless otherwise noted, implementation classes are not thread-safe and dependency nodes should not be mutated by concurrent threads.

Restriction:

This interface is not intended to be extended by clients.

Restriction:

This interface is not intended to be implemented by clients.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MANAGED_EXCLUSIONS A bit flag indicating the exclusions were subject to dependency management
static int	MANAGED_OPTIONAL A bit flag indicating the optional flag was subject to dependency management
static int	MANAGED_PROPERTIES A bit flag indicating the artifact properties were subject to dependency management
static int	MANAGED_SCOPE A bit flag indicating the dependency scope was subject to dependency management
static int	MANAGED_VERSION A bit flag indicating the dependency version was subject to dependency management

Method Summary

Modifier and Type	Method and Description
boolean	accept(DependencyVisitor visitor) Traverses this node and potentially its children using the specified visitor.
Collection<? extends Artifact>	getAliases() Gets the known aliases for this dependency's artifact.
Artifact	getArtifact() Gets the artifact associated with this node.
List<DependencyNode>	getChildren() Gets the child nodes of this node.
Map<?,?>	getData() Gets the custom data associated with this dependency node.
Dependency	getDependency() Gets the dependency associated with this node.
int	getManagedBits() Gets a bit field indicating which attributes of this node were subject to dependency management.
List<? extends Artifact>	getRelocations() Gets the sequence of relocations that was followed to resolve the artifact referenced by the dependency.
List<RemoteRepository>	getRepositories() Gets the remote repositories from which this node's artifact shall be resolved.
String	getRequestContext() Gets the request context in which this dependency node was created.
Version	getVersion() Gets the version that was selected for the dependency's target artifact.
VersionConstraint	getVersionConstraint() Gets the version constraint that was parsed from the dependency's version declaration.
void	setArtifact(Artifact artifact) Updates the artifact of the dependency after resolution.
void	setChildren(List<DependencyNode> children) Sets the child nodes of this node.
void	setData(Map<Object,Object> data) Sets the custom data associated with this dependency node.
void	setData(Object key, Object value) Associates the specified dependency node data with the given key.
void	setOptional(Boolean optional) Sets the optional flag of the dependency.
void	setRequestContext(String context) Sets the request context in which this dependency node was created.
void	setScope(String scope) Sets the scope of the dependency.

Field Detail

MANAGED_VERSION

static final int MANAGED_VERSION

A bit flag indicating the dependency version was subject to dependency management

See Also:

getManagedBits(), Constant Field Values

MANAGED_SCOPE

static final int MANAGED_SCOPE

A bit flag indicating the dependency scope was subject to dependency management

See Also:

getManagedBits(), Constant Field Values

MANAGED_OPTIONAL

static final int MANAGED_OPTIONAL

A bit flag indicating the optional flag was subject to dependency management

See Also:

getManagedBits(), Constant Field Values

MANAGED_PROPERTIES

static final int MANAGED_PROPERTIES

A bit flag indicating the artifact properties were subject to dependency management

See Also:

getManagedBits(), Constant Field Values

MANAGED_EXCLUSIONS

static final int MANAGED_EXCLUSIONS

A bit flag indicating the exclusions were subject to dependency management

See Also:

getManagedBits(), Constant Field Values

Method Detail

getChildren

List<DependencyNode> getChildren()

Gets the child nodes of this node. To conserve memory, dependency nodes with equal dependencies may share the same child list instance. Hence clients mutating the child list need to be aware that these changes might affect more than this node. Where this is not desired, the child list should be copied before mutation if the client cannot be sure whether it might be shared with other nodes in the graph.

Returns:

The child nodes of this node, never null.

setChildren

void setChildren(List<DependencyNode> children)

Sets the child nodes of this node.

Parameters:

children - The child nodes, may be null

getDependency

Dependency getDependency()

Gets the dependency associated with this node. Note: For dependency graphs that have been constructed without a root dependency, this method will yield null when invoked on the graph's root node. The root node of such graphs may however still have a label as returned by getArtifact().

Returns:

The dependency or null if none.

getArtifact

Artifact getArtifact()

Gets the artifact associated with this node. If this node is associated with a dependency, this is equivalent to getDependency().getArtifact(). Otherwise the artifact merely provides a label for this node in which case the artifact must not be subjected to dependency collection/resolution.

Returns:

The associated artifact or null if none.

setArtifact

void setArtifact(Artifact artifact)

Updates the artifact of the dependency after resolution. The new artifact must have the same coordinates as the original artifact. This method may only be invoked if this node actually has a dependency, i.e. if getDependency() is not null.

Parameters:

artifact - The artifact satisfying the dependency, must not be null.

getRelocations

List<? extends Artifact> getRelocations()

Gets the sequence of relocations that was followed to resolve the artifact referenced by the dependency.

Returns:

The (read-only) sequence of relocations, never null.

getAliases

Collection<? extends Artifact> getAliases()

Gets the known aliases for this dependency's artifact. An alias can be used to mark a patched rebuild of some other artifact as such, thereby allowing conflict resolution to consider the patched and the original artifact as a conflict.

Returns:

The (read-only) set of known aliases, never null.

getVersionConstraint

VersionConstraint getVersionConstraint()

Gets the version constraint that was parsed from the dependency's version declaration.

Returns:

The version constraint for this node or null.

getVersion

Version getVersion()

Gets the version that was selected for the dependency's target artifact.

Returns:

The parsed version or null.

setScope

void setScope(String scope)

Sets the scope of the dependency. This method may only be invoked if this node actually has a dependency, i.e. if getDependency() is not null.

Parameters:

scope - The scope, may be null.

setOptional

void setOptional(Boolean optional)

Sets the optional flag of the dependency. This method may only be invoked if this node actually has a dependency, i.e. if getDependency() is not null.

Parameters:

optional - The optional flag, may be null.

getManagedBits

int getManagedBits()

Gets a bit field indicating which attributes of this node were subject to dependency management.

Returns:

A bit field containing any of the bits MANAGED_VERSION, MANAGED_SCOPE, MANAGED_OPTIONAL, MANAGED_PROPERTIES and MANAGED_EXCLUSIONS if the corresponding attribute was set via dependency management.

getRepositories

List<RemoteRepository> getRepositories()

Gets the remote repositories from which this node's artifact shall be resolved.

Returns:

The (read-only) list of remote repositories to use for artifact resolution, never null.

getRequestContext

String getRequestContext()

Gets the request context in which this dependency node was created.

Returns:

The request context, never null.

setRequestContext

void setRequestContext(String context)

Sets the request context in which this dependency node was created.

Parameters:

context - The context, may be null.

getData

Map<?,?> getData()

Gets the custom data associated with this dependency node. Clients of the repository system can use this data to annotate dependency nodes with domain-specific information. Note that the returned map is read-only and setData(Object, Object) needs to be used to update the custom data.

Returns:

The (read-only) key-value mappings, never null.

setData

void setData(Map<Object,Object> data)

Sets the custom data associated with this dependency node.

Parameters:

data - The new custom data, may be null.

setData

void setData(Object key,
             Object value)

Associates the specified dependency node data with the given key. Note: This method must not be called while getData() is being iterated.

Parameters:

key - The key under which to store the data, must not be null.

value - The data to associate with the key, may be null to remove the mapping.

accept

boolean accept(DependencyVisitor visitor)

Traverses this node and potentially its children using the specified visitor.

Parameters:

visitor - The visitor to call back, must not be null.

Returns:

true to visit siblings nodes of this node as well, false to skip siblings.