import java.io.IOException;
import java.io.Reader;
import java.util.Iterator;
import javax.annotation.CheckForNull;

/**
 * A {@link Reader} that concatenates multiple readers.
 *
 * @author Bin Zhu
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
class MultiReader extends Reader {
  private final Iterator<? extends CharSource> it;
  @CheckForNull private Reader current;

 * under the License.
 */
package org.apache.maven.api.services;

import java.io.Serial;

import org.apache.maven.api.annotations.Experimental;

/**
 *
 *
 * @since 4.0.0
 */
@Experimental
public class ArtifactResolverException extends MavenException {

    @Serial
    private static final long serialVersionUID = 7252294837746943917L;

    /**

import org.apache.maven.api.Repository;
import org.apache.maven.api.Version;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 *
 * @since 4.0.0
 */
@Experimental
public interface VersionResolverResult {

    @Nonnull
    List<Exception> getExceptions();

    @Nonnull
    Version getVersion();

    @Nonnull

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * This annotation indicates that a type is automatically generated.
 *
 * @since 4.0.0
 */
@Experimental
@Documented
@Retention(RetentionPolicy.CLASS)
@Target(ElementType.TYPE)

import org.apache.maven.api.cli.mvn.MavenInvoker;
import org.apache.maven.api.cli.mvn.MavenInvokerRequest;
import org.apache.maven.api.cli.mvn.MavenOptions;

/**
 * Local Maven invoker.
 *
 * @since 4.0.0
 */
@Experimental

import org.apache.maven.api.annotations.Nonnull;

/**
 * A listener for session events.
 * TODO: open this to other events like similar to {@code org.apache.maven.eventspy.EventSpy}
 *
 * @since 4.0.0
 */
@Experimental
@FunctionalInterface
@Consumer
public interface Listener {
    void onEvent(@Nonnull Event event);

/**
 * Marker interface for all services provided by the {@link Session}.
 * <p>
 * Services can be retrieved from the session using the
 * {@link Session#getService(Class)} method.
 *
 * @since 4.0.0
 * @see Session#getService(Class)
 */
@Experimental
@ThreadSafe

 * under the License.
 */
package org.apache.maven.cli.logging;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Abstract implementation.
 *
 * @since 3.1.0
 */
public class BaseSlf4jConfiguration implements Slf4jConfiguration {
    private static final Logger LOGGER = LoggerFactory.getLogger(BaseSlf4jConfiguration.class);

    public void setRootLoggerLevel(Level level) {

 * under the License.
 */
package org.apache.maven.cli.logging.impl;

import org.apache.maven.cli.logging.BaseSlf4jConfiguration;

/**
 * Configuration for slf4j-log4j2.
 *
 * @since 3.1.0
 */
public class Log4j2Configuration extends BaseSlf4jConfiguration {
    @Override
    public void setRootLoggerLevel(Level level) {
        String value;
        switch (level) {
            case DEBUG:

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

import java.util.List;

/**
 *
 * @since 3.3.0
 */
public class ProblemCollectorFactory {

    /**
     * The default implementation is not visible, create it with this factory
     *
     * @param problems starting set of problems, may be {@code null}