import org.apache.maven.project.MavenProject;

/**
 * Lifecycle mapping delegate component interface. Calculates project build execution plan given {@link Lifecycle} and
 * lifecycle phase. Standard lifecycles use plugin execution {@code <phase>} or mojo default lifecycle phase to
 * calculate the execution plan, but custom lifecycles can use alternative mapping strategies.
 */
@Named(DefaultLifecycleMappingDelegate.HINT)
@Singleton

                    phase("generate-sources"),
                    phase("process-sources"),
                    phase("generate-resources"),
                    phase("process-resources"),
                    phase("compile"),
                    phase("process-classes"),
                    phase("generate-test-sources"),
                    phase("process-test-sources"),
                    phase("generate-test-resources"),

     * Collection of phases for this lifecycle
     */
    Collection<Phase> phases();

    /**
     * Pre-ordered list of phases.
     * If not provided, a default order will be computed.
     */
    default Optional<List<String>> orderedPhases() {
        return Optional.empty();
    }

    /**
     * A phase in the lifecycle.
     */
    interface Phase {
        String name();

        List<Plugin> plugins();

    }

    @Test
    void testSet() {
        LifecyclePhase phase = new LifecyclePhase();
        assertNull(phase.getMojos());

        phase.set("");
        assertNotNull(phase.getMojos());
        assertEquals(0, phase.getMojos().size());

        phase.set("jar:jar, war:war");

        List<LifecycleMojo> mojos = phase.getMojos();
        assertNotNull(mojos);

    }

    /**
     * Get lifecycle based on phase
     *
     * @param phase
     * @return
     */
    public Lifecycle get(String phase) {
        return getPhaseToLifecycleMap().get(phase);
    }

    /**
     * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
     * phase they want to execute and we can easily determine what lifecycle we need to run.

        return getExecutionPlanItems().iterator();
    }

    /**
     * Returns the last ExecutionPlanItem in the supplied phase. If no items are in the specified phase,
     * the closest executionPlanItem from an earlier phase item will be returned.
     *
     * @param requestedPhase the requested phase
     *                       The execution plan item
     * @return The ExecutionPlanItem or null if none can be found
     */

public class Lifecycles {

    static Lifecycle.Phase phase(String name) {
        return new DefaultPhase(name, Collections.emptyList(), Collections.emptyList());
    }

    static Lifecycle.Phase phase(String name, Plugin plugin) {
        return new DefaultPhase(name, Collections.singletonList(plugin), Collections.emptyList());
    }

    static Plugin plugin(String coord, String phase) {
        String[] c = coord.split(":");

        <executions>
          <execution>
            <id>plugin</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
              <version>2.0.0</version>
              <models>

				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-source-plugin</artifactId>
				<version>3.2.1</version>
				<executions>
					<execution>
						<id>source-jar</id>
						<phase>package</phase>
						<goals>
							<goal>jar</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
			<plugin>
				<artifactId>maven-javadoc-plugin</artifactId>
				<version>3.6.3</version>

        this.defaultPhases = getDefaultPhases(lifecycle);
    }

    // <lifecycle>
    //   <id>clean</id>
    //   <phases>
    //     <phase>pre-clean</phase>
    //     <phase>clean</phase>
    //     <phase>post-clean</phase>
    //   </phases>
    //   <default-phases>
    //     <clean>org.apache.maven.plugins:maven-clean-plugin:clean</clean>
    //   </default-phases>
    // </lifecycle>