Package org.eclipse.aether.util.graph.manager

Class ClassicDependencyManager

java.lang.Object

org.eclipse.aether.util.graph.manager.AbstractDependencyManager

org.eclipse.aether.util.graph.manager.ClassicDependencyManager

All Implemented Interfaces:

org.eclipse.aether.collection.DependencyManager

public final class ClassicDependencyManager
extends AbstractDependencyManager

A dependency manager that mimics the way Maven 2.x works for backward compatibility.

Overview

This manager was used throughout all Maven 3.x versions for backward compatibility reasons. It provides the exact same dependency management behavior as Maven 2.x, which differs significantly from modern dependency management approaches.

Key Characteristics

• Exclusion Handling: Ignores exclusions introduced by direct dependencies
• Management Scope: Only obeys root management, ignoring intermediate management
• Depth Behavior: deriveUntil=2, applyFrom=2 with special "hop" at depth=1
• Level 1 Skip: Ignores context from depth=1 for Maven 2.x compatibility

When to Use

Use this manager when you need exact Maven 2.x compatibility behavior or when working with legacy projects that depend on Maven 2.x dependency resolution semantics.

Comparison with Other Managers

Unlike TransitiveDependencyManager and DefaultDependencyManager, this manager deliberately ignores certain dependency management rules to maintain backward compatibility. See MavenITmng4720DependencyManagementExclusionMergeTest for behavioral differences.

See Also:

TransitiveDependencyManager, DefaultDependencyManager

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.aether.util.graph.manager.AbstractDependencyManager

AbstractDependencyManager.Holder<T>, AbstractDependencyManager.Key

Field Summary

Fields inherited from class org.eclipse.aether.util.graph.manager.AbstractDependencyManager

applyFrom, depth, deriveUntil, managedExclusions, managedLocalPaths, managedOptionals, managedScopes, managedVersions, path, systemDependencyScope

Constructor Summary

Constructors

Constructor	Description
ClassicDependencyManager()	Creates a new dependency manager without any management information.
ClassicDependencyManager(org.eclipse.aether.scope.ScopeManager scopeManager)	Creates a new dependency manager without any management information.

Method Summary

Modifier and Type	Method	Description
org.eclipse.aether.collection.DependencyManager	deriveChildManager(org.eclipse.aether.collection.DependencyCollectionContext context)	Derives a child manager with Maven 2.x compatibility behavior.
protected org.eclipse.aether.collection.DependencyManager	newInstance(MMap<AbstractDependencyManager.Key,java.lang.String> managedVersions, MMap<AbstractDependencyManager.Key,java.lang.String> managedScopes, MMap<AbstractDependencyManager.Key,java.lang.Boolean> managedOptionals, MMap<AbstractDependencyManager.Key,java.lang.String> managedLocalPaths, MMap<AbstractDependencyManager.Key,AbstractDependencyManager.Holder<java.util.Collection<org.eclipse.aether.graph.Exclusion>>> managedExclusions)

Methods inherited from class org.eclipse.aether.util.graph.manager.AbstractDependencyManager

equals, hashCode, isApplied, isDerived, isInheritedDerived, manageDependency

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassicDependencyManager

public ClassicDependencyManager()

Creates a new dependency manager without any management information.

ClassicDependencyManager

public ClassicDependencyManager(org.eclipse.aether.scope.ScopeManager scopeManager)

Creates a new dependency manager without any management information.

This constructor initializes the manager with Maven 2.x compatible behavior:

• deriveUntil = 2 (collect rules only from root level)
• applyFrom = 2 (apply rules starting from depth 2)
• Special depth=1 handling for backward compatibility

Parameters:

scopeManager - application-specific scope manager for handling system dependencies, may be null to use legacy system dependency scope handling

Since:

2.0.12

Method Detail

deriveChildManager

public org.eclipse.aether.collection.DependencyManager deriveChildManager(org.eclipse.aether.collection.DependencyCollectionContext context)

Derives a child manager with Maven 2.x compatibility behavior.

Critical Maven 2.x Compatibility: This method implements a special "hop" at depth=1 that skips dependency management collection at that level. This behavior is essential for Maven 2.x compatibility and is verified by integration tests.

Why the depth=1 skip is necessary: Maven 2.x did not collect dependency management from first-level dependencies, only from the root. Removing this skip would break backward compatibility with Maven 2.x projects.

Specified by:

deriveChildManager in interface org.eclipse.aether.collection.DependencyManager

Overrides:

deriveChildManager in class AbstractDependencyManager

Parameters:

context - the dependency collection context

Returns:

a new child manager or the current instance with passed-through management

See Also:

MNG-4720 Integration Test

newInstance

protected org.eclipse.aether.collection.DependencyManager newInstance(MMap<AbstractDependencyManager.Key,java.lang.String> managedVersions,
                                                                      MMap<AbstractDependencyManager.Key,java.lang.String> managedScopes,
                                                                      MMap<AbstractDependencyManager.Key,java.lang.Boolean> managedOptionals,
                                                                      MMap<AbstractDependencyManager.Key,java.lang.String> managedLocalPaths,
                                                                      MMap<AbstractDependencyManager.Key,AbstractDependencyManager.Holder<java.util.Collection<org.eclipse.aether.graph.Exclusion>>> managedExclusions)

Specified by:

newInstance in class AbstractDependencyManager