<component>
      <role>org.apache.maven.wagon.Wagon</role>
      <role-hint>testfile</role-hint>
      <implementation>org.apache.maven.artifact.resolver.TestFileWagon</implementation>
      <instantiation-strategy>per-lookup</instantiation-strategy>
    </component>
  </components>

/**
 * Extension point that allows build extensions observe and possibly veto mojo executions.
 * <p>
 * Unlike {@link org.apache.maven.execution.MojoExecutionListener}, this extension point does not
 * trigger instantiation of the component, hence "weak" class name prefix. Only applies to mojo execution
 * scoped components.
 * </p>
 * <strong>Note:</strong> This interface is part of work in progress and can be changed or removed without notice.

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.legacy;

import javax.inject.Named;

/**
 * Wagon with per-lookup instantiation strategy.
 */
@Named("perlookup")
public class PerLookupWagon extends WagonMock {

    public String[] getSupportedProtocols() {
        return new String[] {"perlookup"};
    }

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;

/**
 * Metadata for the artifact version directory of the repository.
 *
 * TODO split instantiation (versioning, plugin mappings) from definition
 */
@Deprecated
public class SnapshotArtifactRepositoryMetadata extends AbstractRepositoryMetadata {
    private Artifact artifact;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import junit.framework.TestSuite;

/**
 * Concrete instantiation of {@link AbstractCollectionTestSuiteBuilder} for testing collections that
 * do not have a more specific tester like {@link ListTestSuiteBuilder} or {@link
 * SetTestSuiteBuilder}.
 *
 * @author Chris Povirk

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import junit.framework.TestSuite;

/**
 * Concrete instantiation of {@link AbstractCollectionTestSuiteBuilder} for testing collections that
 * do not have a more specific tester like {@link ListTestSuiteBuilder} or {@link
 * SetTestSuiteBuilder}.
 *
 * @author Chris Povirk

   * use the {@code ArrayList} {@linkplain ArrayList#ArrayList() constructor} directly, taking
   * advantage of <a
   * href="https://docs.oracle.com/javase/tutorial/java/generics/genTypeInference.html#type-inference-instantiation">"diamond"
   * syntax</a>.
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call
  public static <E extends @Nullable Object> ArrayList<E> newArrayList() {

  of most plexus components has been to avoid instance state like the plague.
  With the current parameter passing model of mojos, this will not be possible,
  particularly when we move mojos to a singleton instantiation model, and then
  run a reactorized project...the successive calls may leave behind configuration
  artifacts from invocation to invocation.

Maven Modifications

* DefaultPluginManager

    /**
     * Default ctor is used in IT and most probably some 3rd party code. For those cases, we do provide sane defaults
     * but given this is a component, injection should be used, replacing direct instantiation.
     *
     * @deprecated Do not use this ctor directly, inject this component instead.
     */
    @Deprecated
    public DefaultMojoExecutionConfigurator() {

   * use the {@code HashSet} constructor directly, taking advantage of <a
   * href="https://docs.oracle.com/javase/tutorial/java/generics/genTypeInference.html#type-inference-instantiation">"diamond"
   * syntax</a>.
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call
  public static <E extends @Nullable Object> HashSet<E> newHashSet() {