Package org.eclipse.aether.util.graph.traverser

Class AndDependencyTraverser

java.lang.Object

org.eclipse.aether.util.graph.traverser.AndDependencyTraverser

All Implemented Interfaces:

DependencyTraverser

public final class AndDependencyTraverser
extends Object
implements DependencyTraverser

A dependency traverser that combines zero or more other traversers using a logical AND. The resulting traverser enables processing of child dependencies if and only if all constituent traversers request traversal.

Constructor Summary

Constructors

Constructor	Description
AndDependencyTraverser(Collection<? extends DependencyTraverser> traversers)	Creates a new traverser from the specified traversers.
AndDependencyTraverser(DependencyTraverser... traversers)	Creates a new traverser from the specified traversers.

Method Summary

Modifier and Type	Method	Description
DependencyTraverser	deriveChildTraverser(DependencyCollectionContext context)	Derives a dependency traverser that will be used to decide whether the transitive dependencies of the dependency given in the collection context shall be traversed.
boolean	equals(Object obj)
int	hashCode()
static DependencyTraverser	newInstance(DependencyTraverser traverser1, DependencyTraverser traverser2)	Creates a new traverser from the specified traversers.
boolean	traverseDependency(Dependency dependency)	Decides whether the dependencies of the specified dependency should be traversed.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AndDependencyTraverser

public AndDependencyTraverser(DependencyTraverser... traversers)

Creates a new traverser from the specified traversers. Prefer newInstance(DependencyTraverser, DependencyTraverser) if any of the input traversers might be null.

Parameters:

traversers - The traversers to combine, may be null but must not contain null elements.

AndDependencyTraverser

public AndDependencyTraverser(Collection<? extends DependencyTraverser> traversers)

Creates a new traverser from the specified traversers.

Parameters:

traversers - The traversers to combine, may be null but must not contain null elements.

Method Detail

newInstance

public static DependencyTraverser newInstance(DependencyTraverser traverser1,
                                              DependencyTraverser traverser2)

Creates a new traverser from the specified traversers.

Parameters:

traverser1 - The first traverser to combine, may be null.

traverser2 - The second traverser to combine, may be null.

Returns:

The combined traverser or null if both traversers were null.

traverseDependency

public boolean traverseDependency(Dependency dependency)

Description copied from interface: DependencyTraverser

Decides whether the dependencies of the specified dependency should be traversed.

Specified by:

traverseDependency in interface DependencyTraverser

Parameters:

dependency - The dependency to check, must not be null.

Returns:

true if the dependency graph builder should recurse into the specified dependency and process its dependencies, false otherwise.

deriveChildTraverser

public DependencyTraverser deriveChildTraverser(DependencyCollectionContext context)

Description copied from interface: DependencyTraverser

Derives a dependency traverser that will be used to decide whether the transitive dependencies of the dependency given in the collection context shall be traversed. When calculating the child traverser, implementors are strongly advised to simply return the current instance if nothing changed to help save memory.

Specified by:

deriveChildTraverser in interface DependencyTraverser

Parameters:

context - The dependency collection context, must not be null.

Returns:

The dependency traverser for the target node or null if dependencies should be unconditionally traversed in the sub graph.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object