public static final String DATE_FORMAT_ISO_8601_BASIC = "yyyyMMdd'T'HHmmss.SSSZ";

    public static final String DATE_FORMAT_ISO_8601_EXTEND = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";

    public static final String DATE_FORMAT_ISO_8601_EXTEND_UTC = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";

    public static final String DATE_FORMAT_DIGIT_ONLY = "yyyyMMddHHmmss";

    protected CoreLibConstants() {
    }

 * UnicodeEscaper}. They are heavily optimized for performance and greatly simplify the task of
 * implementing new escapers. It is strongly recommended that when implementing a new escaper you
 * extend one of these classes. If you find that you are unable to achieve the desired behavior
 * using either of these classes, please contact the Java libraries team for advice.
 *

    PropertyContributorExtender(Lookup lookup) {
        this.lookup = lookup;
    }

    @SuppressWarnings({"rawtypes", "unchecked"})
    @Override
    public void extend(MavenExecutionRequest mavenExecutionRequest) {
        Map<String, PropertyContributor> effectivePropertyContributors = lookup.lookupMap(PropertyContributor.class);
        if (!effectivePropertyContributors.isEmpty()) {

/**
 * This class provides a skeletal implementation of the {@code Cache} interface to minimize the
 * effort required to implement this interface.
 *
 * <p>To implement a cache, the programmer needs only to extend this class and provide an
 * implementation for the {@link #get(Object)} and {@link #getIfPresent} methods. {@link
 * #getUnchecked}, {@link #get(Object, Callable)}, and {@link #getAll} are implemented in terms of

/**
 * This class provides a skeletal implementation of the {@code Cache} interface to minimize the
 * effort required to implement this interface.
 *
 * <p>To implement a cache, the programmer needs only to extend this class and provide an
 * implementation for the {@link #get(Object)} and {@link #getIfPresent} methods. {@link
 * #getUnchecked}, {@link #get(Object, Callable)}, and {@link #getAll} are implemented in terms of

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

/**
 * An SPI interface to extend Maven with a new enum value.
 *
 * @param <T> The type of extensible enum to extend
 */
@Experimental
@Consumer
public interface ExtensibleEnumProvider<T extends ExtensibleEnum> extends SpiService {

    /**
     * Registers new values for the T extensible enum.
     *

import org.eclipse.aether.repository.MirrorSelector;
import org.eclipse.aether.repository.ProxySelector;

/**
 * Strictly internal component able to "extend" session in some way.
 *
 * @since 4.0.0
 */
interface RepositorySystemSessionExtender {
    void extend(
            MavenExecutionRequest mavenExecutionRequest,
            Map<String, Object> configProperties,
            MirrorSelector mirrorSelector,

                    final Date timestamp =
                            new SimpleDateFormat(Constants.DATE_FORMAT_ISO_8601_EXTEND_UTC).parse(fileMap.get("@timestamp").toString());
                    for (final DictionaryCreator creator : creatorList) {
                        final DictionaryFile<? extends DictionaryItem> file = creator.create(path, timestamp);
                        if (file != null) {
                            return file;

    }
    this.safeMin = safeMin;
    this.safeMax = safeMax;

    // This is a bit of a hack but lets us do quicker per-character checks in
    // the fast path code. The safe min/max values are very unlikely to extend
    // into the range of surrogate characters, but if they do we must not test
    // any values in that range. To see why, consider the case where:
    // safeMin <= {hi,lo} <= safeMax

import org.apache.maven.execution.MavenExecutionRequest;

/**
 * Strictly internal component able to "extend" {@link MavenExecutionRequest} in some way before it is used to
 * construct resolver session.
 *
 * @since 4.0.0
 */
interface MavenExecutionRequestExtender {
    void extend(MavenExecutionRequest mavenExecutionRequest);