/**
 * Service responsible for validating plugin dependencies.
 *
 * @since 3.9.2
 */
abstract class AbstractMavenPluginDependenciesValidator implements MavenPluginDependenciesValidator {

    protected final PluginValidationManager pluginValidationManager;

    protected AbstractMavenPluginDependenciesValidator(PluginValidationManager pluginValidationManager) {
        this.pluginValidationManager = requireNonNull(pluginValidationManager);

/**
 * Detects Maven3 plugins using maven-compat Maven2 compatibility layer.
 *
 * @since 3.9.3
 */
@Singleton
@Named
class Maven3CompatDependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject
    Maven3CompatDependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected void doValidate(

import org.eclipse.aether.resolution.ArtifactDescriptorResult;

/**
 * Detects mixed Maven versions in plugins.
 *
 * @since 3.9.2
 */
@Singleton
@Named
class MavenMixedDependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject
    MavenMixedDependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected void doValidate(

/**
 * Detects Plexus Container Default in plugins.
 *
 * @since 3.9.2
 */
@Singleton
@Named
class PlexusContainerDefaultDependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject
    PlexusContainerDefaultDependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override

import org.eclipse.aether.resolution.ArtifactDescriptorResult;

/**
 * Detects Maven3 dependencies scope.
 *
 * @since 3.9.3
 */
@Singleton
@Named
class MavenScopeDependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject
    MavenScopeDependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected void doValidate(

import org.eclipse.aether.resolution.ArtifactDescriptorResult;

/**
 * Detects Maven2 plugins.
 *
 * @since 3.9.2
 */
@Singleton
@Named
class Maven2DependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject
    Maven2DependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected void doValidate(