org.mule.maven.client.internal

Class OneInstancePerNodeGraphTransformer

java.lang.Object

org.mule.maven.client.internal.OneInstancePerNodeGraphTransformer

All Implemented Interfaces:

org.eclipse.aether.collection.DependencyGraphTransformer

public class OneInstancePerNodeGraphTransformer
extends Object
implements org.eclipse.aether.collection.DependencyGraphTransformer

DependencyGraphTransformer implementation that makes sure that there are no DependencyNode instances shared amongst plugins, apis and non-plugin subtrees.

This transformer was created after finding out that the received graph was reusing instances of DependencyNode. That caused that, in some cases, the logic implemented by MulePluginDependencyGraphTransformer modified more than the required nodes. As a consequence, the final dependency graph was wrong.

For example, with an application like this:

APP |__plugin | \_lib | \_transitive |__other-lib \_lib \_transitive

The DependencyNode representing the `transitive` dependency, would be the same for all branches. In that case, when MulePluginDependencyGraphTransformer changes it's artifactId so that it doesn't conflict with non-plugin dependencies, since the DependencyNode instance is the same, the artifactId will be changed for multiple branches. That causes the dependency to be filtered because it will be considered as if it was only declared as a plugin dependency.

To fix this issue, this implementation will recreate all DependencyNodes that hang from a plugin's to make sure that if it's modified, it only affects that particular instance. For api dependencies, the logic is similar, but we only recreate other api dependencies. That is because, non-api dependencies should not be considered as dependencies in an "api parent context" and should conflict with other dependencies in the general graph.

Since:

1.4.3, 1.5.0

Constructor Summary

Constructors

Constructor and Description
OneInstancePerNodeGraphTransformer()

Method Summary

Modifier and Type	Method and Description
org.eclipse.aether.graph.DependencyNode	transformGraph(org.eclipse.aether.graph.DependencyNode node, org.eclipse.aether.collection.DependencyGraphTransformationContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

OneInstancePerNodeGraphTransformer

public OneInstancePerNodeGraphTransformer()

Method Detail

transformGraph

public org.eclipse.aether.graph.DependencyNode transformGraph(org.eclipse.aether.graph.DependencyNode node,
                                                              org.eclipse.aether.collection.DependencyGraphTransformationContext context)
                                                       throws org.eclipse.aether.RepositoryException

Specified by:

transformGraph in interface org.eclipse.aether.collection.DependencyGraphTransformer

Throws:

org.eclipse.aether.RepositoryException