this.logger.error(
                    String.format("Invalid version specification '%s' creating plugin artifact '%s'.", version, plugin),
                    e);

            return null;
        }

        return artifactFactory.createPluginArtifact(plugin.getGroupId(), plugin.getArtifactId(), versionRange);
    }

                    if (versions.get(key) == null) {
                        versions.put(key, plugin.getVersion());
                        plugins.put(key, plugin);
                    }
                }
                PluginManagement mgmt = build.getPluginManagement();
                if (mgmt != null) {
                    for (Plugin plugin : mgmt.getPlugins()) {
                        String key = plugin.getKey();

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

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.concurrent.atomic.AtomicReference;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.LegacySupport;
import org.eclipse.aether.RepositorySystemSession;

/**

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin;

import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;

    <testSourceDirectory>src/test</testSourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <configuration>
          <includes>
            <include>**/AvalonLoggerTest.java</include>
          </includes>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
      <groupId>log4j</groupId>

          </association>
          <description><![CDATA[Artifacts in the format <code>groupId:artifactId</code>. All the ones listed here are filtered (i.e. removed) from plugin and build extension class realms,
          i.e. referencing any of those coordinates in plugin/build extension dependencies has no effect.]]>
          </description>
        </field>
      </fields>
    </class>
  </classes>

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api.services.xml;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.plugin.descriptor.PluginDescriptor;

/**
 * Reads and writes a {@link PluginDescriptor} object to/from XML.
 *
 * @since 4.0.0
 */
@Experimental

import org.apache.maven.execution.ExecutionEvent.Type;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.ExecutionEventCatapult;
import org.apache.maven.plugin.MojoExecution;

/**
 */
public class ExecutionEventCatapultStub implements ExecutionEventCatapult {

    public void fire(Type eventType, MavenSession session, MojoExecution mojoExecution) {}

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.execution;

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;

/**
 * Holds data relevant for an execution event.
 *
 */
public interface ExecutionEvent {

    /**

     * collected from this method in combination with a custom cache implementation to dispose unused records from the
     * cache.
     *
     * @param project The project that employs the plugin realm, must not be {@code null}.
     * @param record The cache record being used for the project, must not be {@code null}.
     */
    void register(MavenProject project, Key key, CacheRecord record);