Path path = Paths.get("").toAbsolutePath();

        MavenSession mavenSession = createMavenSession(null);
        mavenSession.getRequest().setTopDirectory(path);
        mavenSession.getRequest().setRootDirectory(path);

        Object result = new PluginParameterExpressionEvaluator(mavenSession, new MojoExecution(null))
                .evaluate("${session.rootDirectory.uri}");

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

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.LifecycleExecutionPlanCalculator;
import org.apache.maven.lifecycle.internal.LifecycleStarter;
import org.apache.maven.lifecycle.internal.LifecycleTaskSegmentCalculator;

        return false;
    }

    @Override
    public final void validate(
            MavenSession mavenSession,
            MojoDescriptor mojoDescriptor,
            Class<?> mojoClass,
            PlexusConfiguration pomConfiguration,
            ExpressionEvaluator expressionEvaluator) {
        doValidate(mavenSession, mojoDescriptor, mojoClass, pomConfiguration, expressionEvaluator);
    }

 */
@Named
@Singleton
public class DefaultLegacySupport implements LegacySupport {

    private static final ThreadLocal<AtomicReference<MavenSession>> SESSION = new InheritableThreadLocal<>();

    @Override
    public void setSession(MavenSession session) {
        AtomicReference<MavenSession> reference = DefaultLegacySupport.SESSION.get();
        if (reference != null) {
            reference.set(null);
        }

                .filter(parameter -> !parameter.isEditable())
                .forEach(parameter -> checkParameter(
                        mavenSession, mojoDescriptor, mojoClass, parameter, pomConfiguration, expressionEvaluator));
    }

    private void checkParameter(
            MavenSession mavenSession,
            MojoDescriptor mojoDescriptor,
            Class<?> mojoClass,
            Parameter parameter,

import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;

/**
 * Holds data relevant for an execution event.
 *
 */
class DefaultExecutionEvent implements ExecutionEvent {

    private final Type type;

    private final MavenSession session;

    private final MojoExecution mojoExecution;

    // separate.
    protected MavenSession createMavenSession(File pom) throws Exception {
        return createMavenSession(pom, new Properties());
    }

    protected MavenSession createMavenSession(File pom, Properties executionProperties) throws Exception {
        return createMavenSession(pom, executionProperties, false);
    }

public class EmptyLifecycleExecutor implements LifecycleExecutor {

    @Override
    public MavenExecutionPlan calculateExecutionPlan(MavenSession session, String... tasks) {
        return new MavenExecutionPlan(null, new DefaultLifecycles());
    }

    @Override
    public MavenExecutionPlan calculateExecutionPlan(MavenSession session, boolean setup, String... tasks) {
        return new MavenExecutionPlan(null, new DefaultLifecycles());
    }

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 {

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

    @Override

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

import java.util.List;
import java.util.Set;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.LifecycleNotFoundException;
import org.apache.maven.lifecycle.LifecyclePhaseNotFoundException;
import org.apache.maven.lifecycle.MavenExecutionPlan;